As filed with the Securities and Exchange Commission on May 22, 1998
                          Registration No. 33-44562               

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                        POST-EFFECTIVE AMENDMENT NO. 1
                                 TO FORM S-1

               REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                            PROTEIN DESIGN LABS, INC.
             (Exact name of registrant as specified in its charter)

Delaware 2836 94-3023969 (State or other jurisdiction of (Primary Standard Industrial (I.R.S. Employer incorporation or organization) Classification Number) Indentification Number)
2375 Garcia Avenue Mountain View, CA 94043 (650) 903-3700 (Address, including zip code, and telephone number, including area code, of Registrant's principal executive offices) Douglas O. Ebersole, Esq. Senior Vice President, Licensing and Corporate Services, General Counsel and Secretary PROTEIN DESIGN LABS, INC. 2375 Garcia Avenue Mountain View, CA 94043 (650) 903-3700 (Name, address, including zip code, and telephone number, including area code, of agent for service) Copies to: GREGORY M. GALLO, ESQ. DOUGLAS J. REIN, ESQ. Gray Cary Ware & Freidenrich LLP 400 Hamilton Avenue Palo Alto, California 94301-1825 (650) 328-6561 If any of the securities being registered on this Form are being offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, as amended (the "Securities Act") check the following box.[ ] If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration number of the earlier effective registration statement for the same offering. [ ] If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration number of the earlier effective registration statement for the same offering. [ ] If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [X] 133-44562 If delivery of the prospectus is expected to be made pursuant to Rule 434, check the following box. [ ] EXPLANATORY NOTE This Post-Effective Amendment No. 1 to the Registration Statement on Form S-1 (File No. 33-44562) of Protein Design Labs, Inc. (the "Registration Statement") is filed pursuant to Rule 462(d) of the Securities Act solely for the purpose of refiling Exhibits 10.7, 10.8, 10.9, 10.11, 10.13, 10.14, 10.15 and 10.16 to the Registration Statement for which confidential treatment previously was granted and subsequently has been extended by the Securities and Exchange Commission. The contents of the Registration Statement are hereby incorporated by reference. PART II INFORMATION NOT REQUIRED IN PROSPECTUS Item 16. Exhibits and Financial Statement Schedules. (a) Exhibits. Exhibit Number Exhibit Title 1.1* Form of Purchase Agreement. 3.1* Restated Certificate of Incorporation. 3.2* Amended Bylaws 4.1* Registration Rights Agreement between the Company and certain holders of Preferred Stock and Common Stock dated August 21, 1986. 4.2* Amendment to Registration Rights Agreement between the Company and certain holders of Preferred Stock and Common Stock dated March 16, 1989. 4.3* Registration Rights Agreement between the Company and Hoffmann-La Roche Inc. dated March 16, 1989. 4.4* Standstill Agreement between the Company and Hoffmann-La Roche Inc. dated March 16, 1989. 5.1* Opinion and Consent of Ware & Freidenrich, A Professional Corporation. 10.1* Form of Director and Officer Indemnification Agreement. 10.2* 1991 Stock Option Plan, together with forms of Incentive Stock Option Agreement and Nonqualified Stock Option Agreement. 10.3* Founder Stock Purchase Agreement between the Company and Dr. Laurence Jay Korn dated August 21, 1986. 10.4* Founder Stock Purchase Agreement between the Company and Dr. Cary Queen dated January 1, 1987. 10.5* Lease Agreement between the Company and Charleston Properties, a California general partnership, dated December 22, 1989. 10.6* Deferred Compensation Plan dated July 22, 1991. 10.7+ License Agreement between the Company and the National Technical Information Service effective as of October 31, 1988 (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.8+ License Agreement between the Company and Hoffmann-La Roche Inc. effective January 31, 1989 (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.9+ License Agreement between the Company and F. Hoffmann-La Roche & Co. effective January 31, 1989 (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.10* License Agreement between the Company and Medical Research Council of the United Kingdom dated July 1, 1989, as amended on January 30, 1990 (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.11+ License Agreement between the Company and Sloan-Kettering Institute for Cancer Research dated November 30, 1989 (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.12* License and Option Agreement between the Company and The UAB Research Foundation dated December 31, 1989, (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.13+ License Agreement between the Company and the Board of Trustees of the Leland Stanford Junior University effective July 1, 1990 (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.14+ Software License Agreement among the Company, Molecular Applications Group and Michael Levitt effective September 1, 1990 (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.15+ Development and License Agreement between the Company and Sandoz Pharma, Ltd. effective December 1, 1990 (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.16+ Development and License Agreement between the Company and Yamanouchi Pharmaceutical Company, Ltd. effective February 12, 1991, as amended on February 12, 1991 (with certain confidential information deleted and marked by a box surrounding the deleted information). 10.17* License Option Agreement between the Company and Hoffmann-La Roche Inc. effective February 1, 1991. 10.18* 1986 Stock Purchase Plan. 10.19* Forms of Stock Purchase Agreement under the 1986 Stock Purchase Plan. 10.20* Series A Stock Purchase Warrant issued to Mayfield V dated August 16, 1990. 10.21* Warrant Purchased Agreement between the Company and certain holders of Preferred Stock dated August 21, 1986. 10.22* Stock Purchase Agreement between the Company and certain holders of Preferred Stock and Common Stock dated August 21, 1986. 10.23* Amendment to Stock Purchase Agreement between the Company and certain holders of Preferred Stock and Common Stock dated February 2, 1987. 10.24* Amendment to Stock Purchase Agreement between the Company and certain holders of Preferred Stock and Common Stock dated March 16, 1989. 10.25* Stock Purchase Agreement between the Company and Hoffmann-La Roche Inc. dated March 16, 1989. 11.1* Statement regarding computation of per share earnings. 24.1* Consent of Ernst & Young, Independent Auditors. Reference is made to page II-5. 24.2* Consent of Ware & Freidenrich, A Professional Corporation. Reference is made to Exhibit 5.1. 25.1* Power of Attorney for Drs. Korn and Queen and Messrs. Gould and Saxe. 25.2* Power of Attorney for Dr. Falkow. * Previously filed with the Registration Statement on Form S-1 for Protein Design Labs, Inc. + Extended confidential treatment has been granted with respect to portions of this Exhibit. Such portions have been omitted and filed separately with the Securities and Exchange Commission. (b) Financial Statement Schedules None. SIGNATURES Pursuant to the requirements of the Securities Act, the Registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Mountain View, County of Santa Clara, State of California, on the 22nd day of May, 1998. PROTEIN DESIGN LABS, INC. /s/ Laurence Jay Korn -------------------------- Laurence Jay Korn Chief Executive Officer and Chairperson of the Board of Directors (Principal Executive Officer) Pursuant to the requirements of the Securities Act, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated:
Signature Title Date - -------------------------- ------------------------------------- ------------- /s/ Laurence Jay Korn Chief Executive Officer and May 22, 1998 - -------------------------- Chairperson of the Board of Directors Laurence Jay Korn (Principal Executive Officer) /s/ Jon S. Saxe* President and Director May 22, 1998 - -------------------------- (Principal Accounting Officer) Jon S. Saxe /s/ Cary L. Queen* Director May 22, 1998 - -------------------------- Cary L. Queen /s/ Stanley Falkow* Director May 22, 1998 - -------------------------- Stanley Falkow /s/ George M. Gould* Director May 22, 1998 - -------------------------- George M. Gould Director - -------------------------- Max Link Director - -------------------------- Jurgen Drews
* By: /s/ LAURENCE JAY KORN -------------------------- Laurence Jay Korn Attorney-in-Fact
 

EXHIBIT 10.7

CONFIDENTIAL TREATMENT REQUESTED
LICENSE AGREEMENT

This Agreement is entered into between the National Technical 
Information Services (NTIS), a primary operating unit of the United States 
Department of Commerce, having offices at 5285 Port Royal Road, Springfield, 
VA  22161, and Protein Design Labs, Incorporated (LICENSEE), a corporation, 
having offices in Palo Alto, California.

WHEREAS, the United States Department of Health and Human Services has 
sponsored research on malignancy and autoimmune disorders in humans and has 
received by assignment certain valuable patent rights thereon in the United 
States; and

WHEREAS, pursuant to 35 U.S.C. 207 and 37 C.F.R. 404 the Department of 
Health and Human Services has transferred custody of the entire right, title 
and interest in the patent rights to the Department of Commerce; and

WHEREAS, the Department of Commerce, pursuant to 35 U.S.C. 207 and 37 
C.F.R. 404 is authorized to receive by transfer custody of the right, title 
and interest in federally owned inventions; to apply for, obtain and maintain 
patents on federally owned inventions in the United States and in foreign 
countries; to grant nonexclusive, partially exclusive or exclusive licenses 
under federally owned patents and patent applications; and to undertake all 
other suitable and necessary steps to protect and administer rights to 
federally owned inventions; and 

WHEREAS, the Secretary of Commerce, through Department Organization 
Order 30-7A, has delegated to NTIS the authority of the Secretary to acquire 
federally owned inventions from other Federal agencies for the purpose of 
licensing the use of those inventions in the United States; and

WHEREAS, NTIS desires, in the public interest, that the subject 
invention be perfected, marketed and practiced so that the benefits are 
readily available for widest possible utilization in the shortest time 
possible; and

WHEREAS, LICENSEE has the facilities, personnel and expertise to bring, 
and is willing to expend reasonable efforts to bring the invention to the 
point of practical application at an early date.

NOW THEREFORE, in consideration of the foregoing, including the above-
cited patent licensing regulations, NTIS and LICENSEE agree as set forth 
below.

                                 ARTICLE I
                                Definitions

1.1     Licensed Patent(s) shall mean issued claims in U.S. Patent 
Application Serial Number 7-085,707 filed August 17, 1988 all divisions, 
continuations and continuations-in-part of such patent applications, where the 
making, using or selling in such continuations-in-part would be covered by a 
claim in such patent applications or their divisions and all patents issuing 
from such patent applications and all reissues, renewals and extensions of 
such patents.

1.2     Licensed Process shall mean a method of treating T-cell mediated 
disorders in humans encompassed within the scope of a claim in a Licensed 
Patent.

1.3     Net Sales shall mean the amount billed or invoiced on sales of any 
Product used in practicing the Licensed Process or, in the event of disposal 
of any Products other than as scrap prior to its shipment from its place of 
manufacture or pre-disposal storage or other than by sales, the amount billed 
or invoiced for a like quantity and quality of any such Product on or about 
the time of such disposal, less:
(a)      flat nine percent (9%) representing customary trade, 
quantity or cash discounts and nonaffiliated brokers' or agents' 
commissions; actually allowed and taken; 
(a)     Amounts repaid or credited by reason of rejections or 
returns; and/or
(c)     Any freight or other transportation costs, insurance 
charges, duties, tariffs and all sales and excise taxes based 
directly on sales or turnover or delivery of material produced 
under this Agreement.

Net Sales shall not include any product used in practicing the 
Licensed Process which is used for research or collaborative 
research, clinical trials, donations for humanitarian purposes, or 
promotional allowances or other promotional purposes.

1.4     AFFILIATE shall mean any person, corporation, firm, partnership or 
other entity in which LICENSEE owns or controls at least fifty percent (50%) 
of the voting stock thereof.

1.5     Licensed Territory shall mean those countries listed in the 
attached Schedule and in which a Licensed Patent subsists, and any other 
countries in which a Licensed Patent may be filed in the future.

                            ARTICLE II
                              Grant

2.1     NTIS hereby grants to LICENSEE and any AFFILIATES of LICENSEE's 
choice, subject to the terms and conditions herein, a nonexclusive license 
under the Licensed Patent(s) to make, have made, use and sell Products used in 
practicing the Licensed Process and to practice the Licensed Process in the 
Licensed Territory for the term of this Agreement.  LICENSEE shall notify NTIS 
of any AFFILIATE included under this Paragraph 2.1.  LICENSEE may make, have 
made, use and sell products used in practicing the Licensed Process and to 
practice the Licensed Process in any country outside the Licensed Territory 
with no obligation to NTIS if such products are both made and sold outside the 
Licensed Territory; provided, however, that LICENSEE must bear all risks of 
third party claims against the Licensed Patent(s) in any area outside the 
Licensed Territory.


2.2     NTIS hereby grants to LICENSEE the right to grant sublicenses no 
greater in scope than the license granted in Paragraph 2.1 above to 
nonaffiliated companies subject to the provisions of this Agreement and to the 
submission to and approval by NTIS of the proposed sublicense, which approval 
shall not be unreasonably withheld.  Each sublicense shall make reference to 
this Agreement and a copy of such sublicense shall be furnished to NTIS 
promptly after its execution.

2.3     NTIS hereby grants to LICENSEE and its included AFFILIATES and 
sublicensees the right to extend to their customers of Products used in 
practicing the Licensed Process on which a maintenance and royalty fee has 
been or will be paid the right to use such Products.

                              ARTICLE III
                         Royalties and Payments

3.1     Within thirty (30) days after the execution date of this Agreement 
by NTIS, LICENSEE shall pay to NTIS an execution fee of [               ], 
no part of which shall be refunded for any reason.

3.2     (a)     LICENSEE shall also pay to NTIS an annual maintenance fee of 
[       ], no part of which shall be refunded for any reason.  The first annual 
maintenance fee payment which shall be paid at the time of making the payment 
required in Paragraph 3.1 above, shall be prorated for the balance of the 
calendar year remaining after the effective date of this Agreement.  
Subsequent annual maintenance fees shall accrue on January 1 of each year and 
shall be payable within sixty (60) days thereafter during the term of this 
Agreement.  Should the ordinary and usual costs to NTIS of maintaining any 
Licensed Patent(s) exceed in any year the total annual maintenance fee 
received from all licensees under such Licensed Patent(s), NTIS may request 
each licensee to increase its minimum annual fee for the following year by an 
amount proportionate to the number of licensees, the sum of which amounts 
equals such excess costs.  Should LICENSEE fail to include such increased 
amount in its annual maintenance fee when due, NTIS may at its option, 
terminate LICENSEE's license as to such Licensed Patents in accordance with 
the provisions of Paragraph 8.2 hereof.  The annual maintenance fee paid by 
LICENSEE for any given year shall be a credit against any administration and 
royalty fee accrued for such year in accordance with Paragraph 3.3 below.  The 
administration and royalty accrued in any one calendar year shall not be 
credited against the annual maintenance fee paid or to be paid in any other 
year.
(b)     Before any commitment to expend substantial funds for an 
extraordinary and unusual procedure for obtaining or maintaining any Licensed 
Patent(s), including but not limited to interference, reexamination, term-
extension or reissue but not including infringement or counterclaims thereto, 
NTIS shall notify LICENSEE of such extraordinary and unusual procedure and the 
estimated cost thereof and request LICENSEE to assume responsibility for a 
proportionate share of such cost, i.e., the cost divided by the number of 
licensees under the 

CONFIDENTIAL TREATMENT REQUESTED

Licensed Patents.  Should LICENSEE decline to assume such 
responsibility, NTIS may terminate LICENSEE's license for the country in the 
Licensed Territory in which such cost would have been incurred under such 
Licensed Patent(s) in accordance with the provisions of Paragraph 8.2 hereof.

3.3     LICENSEE shall pay NTIS an administration and royalty fee on the 
Net Sales of LICENSEE (or its included AFFILIATES or sublicensees) of [ ], if 
the entire anti-Tac monoclonal antibody, as described in U.S. Patent 
Application Serial Number 7-085,707 filed August 17, 1987 (the "Antibody"), is 
included in the product used in practicing the Licensed Process by Licensee, 
its included AFFILIATES or sublicensees.  In the event that the licensed 
Antibody or portion of it is sold as part of another protein or combination 
package containing antibodies or other reagents and if, as such part, the 
Antibody or a portion of it does not have a separate invoiced selling price, 
then for the purpose of computing royalties, the Net Sales Price of the 
Product used in practicing the licensed process shall be the net selling price 
of the entire protein multiplied by the ratio of the manufacturing cost of the 
antibody or portion of it to the manufacturing cost of the entire protein.  
This ratio shall be a fraction, the numerator of which shall be obtained by 
counting the number of Amino Acids comprising the complementary determining 
regions [as defined in E. Kabat et. al., Sequences of Proteins of Immological 
interest 45,121 (1983)], of the Antibody and the denominator of which shall be 
the total number of Amino Acids comprising the entire protein.

3.4     [       ] royalty fee shall be payable hereunder for direct sales of 
Products used in practicing the Licensed Process by LICENSEE or its included 
AFFILIATES and sublicensees to the Government of the United States of America 
or on any such Product scrapped prior to shipment from its place of 
manufacture.

3.5     LICENSEE agrees to submit to NTIS within sixty (60) days after 
each calendar half year ending June 30th and December 31st, reports setting 
forth for the preceding six (6) month period the amount of Products used in 
practicing the Licensed Process made, used, sold or otherwise disposed of 
(except scrap as previously provided) by LICENSEE and its included AFFILIATES 
and sublicensees in the Licensed Territory, the Net Sales thereof separated as 
to Net Sales within the Licensed Territory and those of such Products made 
within the Licensed Territory but sold elsewhere and the amount of royalty fee 
due thereon, and with each such report LICENSEE agrees to pay the amount of 
such fee due.  If no such fee is due to NTIS for any report period, the 
written report shall so state.

3.6     All payments due NTIS under this Article III shall be payable in 
United States dollars for the account of "NTIS/Patent Licensing."  All checks 
and bank drafts shall be drawn on United States banks.  If payments are 
overdue, late charges will be applied as required by the Department of 
Treasury (Treasury Fiscal Requirements Manual, Section 8020.20).  Conversion 
of foreign currency to United States dollars shall be made at the conversion 
rate existing in the United States on the last business day of the applicable 
reporting period for the purchase of United States dollar bank wire transfers 
for settlement of such payment obligations.  Any and all loss of exchange, 
value, taxes or other expenses incurred in the transfer or conversion of other 
currency to United States dollars shall be paid entirely by LICENSEE.

3.7     LICENSEE and/or its included AFFILIATES and/or sublicensees shall 
pay all necessary expenses for its commercialization of Products used in 
practicing the Licensed Process and such expenses shall not be deducted from 
any payments due NTIS as provided herein.

3.8     Except as provided in Paragraph 1.3(c), any tax on any payment due 
NTIS under this ARTICLE III in any country in which such payment accrued shall 
be paid by LICENSEE without deduction from the amount owned to NTIS.

                               ARTICLE IV
                                Markings

LICENSEE, its included AFFILIATES and sublicensees may, at their sole 
option and in conformity with applicable statutes, identify Licensed Products 
with the marking "Licensed Under U.S. Patent or "U.S. Patent Pending.""  The 
name of the Government employee inventor(s), the name of any agency or 
department of the United States Government, or any adaptation of the above 
shall not be used in any promotional activity without prior written approval 
from NTIS.

                                ARTICLE V
                           Reports and Records

5.1     LICENSEE shall provide written annual reports within sixty (60) 
days of the end of each calendar year detailing progress being made to bring 
the invention licensed hereunder to practical application.  No further annual 
progress reports will be required after notification of the first commercial 
sale of Licensed Products unless otherwise requested by NTIS.

5.2     LICENSEE and its included AFFILIATES shall keep and shall cause 
their sublicensees to keep accurate and complete records of Products used in 
practicing the Licensed Process made, used, sold or otherwise disposed of 
(except scrap as previously provided), and such products used solely for 
research under this Agreement in the Licensed Territory, appropriate to 
determine the amount of the administration and royalty fee due hereunder.  
Such records shall be retained for at least two (2) years following a given 
reporting period and, upon reasonable notice, shall be available during normal 
business hours for inspection at the expense of NTIS by an accountant selected 
by NTIS and approved by LICENSEE for the sole purpose of verifying reports and 
payments hereunder.  Such accountant shall not disclose to NTIS any 
information other than information relating to the accuracy of reports and 
payments made under this Agreement.

                               ARTICLE VI
                           Patent Enforcement

6.1     LICENSEE shall notify NTIS promptly in writing of any infringement 
of a Licensed Patent which becomes known to LICENSEE.  If NTIS determines that 
a substantial infringement exists, NTIS shall communicate such determination 
to LICENSEE in writing and take prompt action to attempt to eliminate that 
substantial infringement.  LICENSEE shall cooperate with NTIS in determining 
if substantial infringement exists and, if so, in attempting to eliminate that 
substantial infringement.

6.2     If NTIS receives LICENSEE's infringement notice under the 
provisions of paragraph 6.1 above and within a reasonable time following the 
date of such notice, NTIS is unsuccessful in eliminating the infringement 
which it has determined is substantial, NTIS agrees to recommend to the 
appropriate United States Government authorities that an infringement action 
based on such infringed Licensed Patent be initiated.  LICENSEE shall, at 
NTIS' request, cooperate in every respect in the preparation and prosecuting 
of such action including making available to NTIS records, information, 
evidence, and testimony by employees of LICENSEE relevant to the substantial 
infringement of the Licensed Patent.

6.3     If, after twelve (12) months from the date of LICENSEE's notice of 
an infringement under the provisions of Paragraph 6.1 above, which 
infringement NTIS has determined constitutes a substantial infringement of a 
Licensed Patent and NTIS has not eliminated such substantial infringement and 
the United States Government has not initiated an infringement suit, LICENSEE 
shall be excused from payment of the royalty fee due hereunder resulting from 
sales or other dispositions of Licensed Products.  When the substantial 
infringement has been eliminated or an infringement suit has been initiated, 
NTIS shall notify LICENSEE in writing of either of such event and LICENSEE's 
obligation to pay the annual maintenance and royalty fee shall resume as of 
the date that the infringement is eliminated or such infringement suit is 
initiated.

                              ARTICLE VII
                         Licensee Performance

7.1     LICENSEE shall expend reasonable efforts and resources to carry 
out the development and marketing plan submitted with LICENSEE's application 
for a license and to bring Products used in practicing the Licensed Process to 
the point of practical application (as defined at 37 C.F.R. 404.3(d)) within 
four years of the effective date of this Agreement, unless this period is 
extended by mutual agreement of the parties.  NTIS shall not unreasonably 
withhold approval of any request of LICENSEE to extend this period, if such 
request is supported by a reasonable showing by LICENSEE of due diligence 
toward bringing such Products to the point of practical application.  "Due 
diligence" shall include any reasonable and diligent application for approval 
required by any Government agency within the United States.

7.2     After bringing Products used in practicing the Licensed Process to 
the point of practical application in the Licensed Territory, LICENSEE agrees 
to keep Licensed Products reasonably available to the public in the Licensed 
Territory during the term of this Agreement.

7.3     LICENSEE agrees that Products used in practicing the Licensed 
Process sold or otherwise disposed of in the United States by LICENSEE, its 
included AFFILIATES and the sublicensees will be manufactured substantially in 
the United States.

7.4     Failure to comply with the terms of this Article VII shall be 
cause for modification or termination of this Agreement in accordance with the 
provisions of Article VIII below.

                               ARTICLE VIII
                         Modification and Termination

8.1     This Agreement may be modified or terminated by NTIS subject to 
the provisions of Paragraphs 8.2 and 10.4 below, if it is determined that:
(a)     LICENSEE, or any of its included AFFILIATES or any of its 
sublicensees fail to meet the obligations set forth in Article VII 
above;
(b)Such action is necessary to meet requirements for public use 
specified by Federal regulations issued after the date of the 
license and such requirements are not reasonably satisfied by the 
LICENSEE, its included AFFILIATES or its sublicensees;
(c)     LICENSEE has willfully made a false statement of or 
willfully omitted a material fact in the license application or in 
any report required by this Agreement;
(d)     LICENSEE, or any of its included AFFIALIATES or any of its 
sublicensees commit a substantial breach of a covenant or 
agreement contained in this Agreement;
(e)     LICENSEE is adjudged a bankrupt or has its assets placed in 
the hands of a receiver or makes any assignment or other 
accommodation for the benefit of creditors; or
(f)     LICENSEE, or any of its included AFFILIATES or any of its 
sublicensees misuse any Licensed Patent.

8.2     Prior to any modification or termination of this Agreement NTIS 
shall furnish LICENSEE and any sublicensee of record a written notice of 
intention to modify or terminate, and the LICENSEE and any notified 
sublicensee shall be allowed thirty (30) days after the date on such notice to 
remedy any breach or default of any covenant or agreement of this Agreement or 
to show cause why this Agreement should not be modified or terminated.

8.3     LICENSEE may terminate this Agreement at any time as to any or all 
Licensed Patents upon ninety (90) days written notice to NTIS.

8.4     Upon termination of this Agreement, sums due to NTIS from LICENSEE 
in respect of the Licensed Patent(s) included in such termination shall become 
immediately payable.  In all other respects, the rights and obligations of the 
parties hereto concerning the Licensed Patent(s) included in such termination 
shall cease as of the effective date of such termination.

8.5     In the event of termination of this Agreement, any sublicense of 
record granted pursuant to Paragraph 2.2 may, at sublicensee's option, be 
converted to a license directly between sublicensee and NTIS.

                               ARTICLE IX
                                Duration

This Agreement, unless sooner terminated as provided herein, shall 
remain in effect until the expiration of the last-to-expire Licensed Patent.

                                 ARTICLE X
                                 General

10.1    NTIS represents and warrants that the entire right, title and 
interest in the Licensed Patent(s) has been assigned to the United States of 
America as represented by the Secretary of Commerce and that NTIS has the 
authority to issue licenses under the Licensed Patent(s).  NTIS does not 
warrant the patentability or validity of the Licensed Patent(s) and makes no 
representations whatsoever with regard to the scope of the Licensed Patent(s) 
or that such Licensed Patent(s) may be exploited without infringing other 
patents.

10.2    This Agreement shall not be transferred or assigned by LICENSEE to 
any party other than to a successor or assignee of the entire business 
interest of LICENSEE relating to Licensed Products.

10.3    NTIS shall notify LICENSEE of any subsequent agreement containing 
more favorable terms and conditions which may hereafter be granted by NTIS to 
any other party under the Licensed Patents; and LICENSEE, if it is in a 
position to do so, may substitute any or all the terms and conditions of such 
other agreement for the terms and conditions of this Agreement.

10.4    The parties shall make every reasonable effort to resolve amicably 
any dispute concerning a question of fact arising under this Agreement.  Any 
disputes not settled amicably between the parties concerning a question of 
fact arising under this Agreement shall be decided by the Director, NTIS, who 
shall reduce his decision to writing and mail or otherwise furnish a copy 
thereof to LICENSEE.  The decision of the Director, NTIS, to modify or 
terminate this Agreement shall be final and conclusive unless LICENSEE mails 
or otherwise furnishes to the Director, NTIS, a written appeal under the 
Appeal Procedures of 15 C.F.R. Part 17, Subpart C.  Pending final decision of 
a dispute hereunder, LICENSEE shall proceed diligently with the performance of 
its obligations under this Agreement.

10.5    The interpretation and application of the provisions of this 
Agreement shall be governed by the laws of the United States as interpreted 
and applied by the Federal courts in the District of Columbia.

10.6    Written notices required to be given under this Agreement shall be 
considered duly given if mailed by first class mail, postage prepaid and 
addressed as follows:
If to NTIS:             Director, Office of Federal Patent Licensing
                        National Technical Information Service
                        United States Department of Commerce
                        5285 Port Royal Road
                        Springfield, VA 22161

If to LICENSEE:         Protein Design Labs, Inc.
                        3181 Porter Drive
                        Palo Alto, CA 94304

or such other address as either party may request in writing.

10.7    This Agreement constitutes the entire understanding and supersedes 
all prior agreements and understandings between the parties with respect to 
the subject matter hereof or information relating thereto except for any non-
disclosure agreement relating to the claims of the Licensed Patent(s) which 
non-disclosure agreement, if any, is incorporated herein by reference, and 
neither party shall be obligated by any condition, promise or representation 
other than those expressly stated herein or as may be subsequently agreed to 
by the parties hereto in writing.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be 
executed by their duly authorized representatives.
The Effective Date of this Agreement is October 31, 1988.

Witness:                               National Technical Information Service
/s/ P. Divanain                        /s/Joseph F. Caponio 
- -------------------                    --------------------
                                       JOSEPH F. CAPONIO
                                       Director

October 12, 1988                       October 12, 1988 
- -------------------                    --------------------
     Date                                   Date

Protein Design Labs, Inc.

Witness:
/s/ Cary Queen                         /s/Laurence Jay Korn
- ---------------------                  ---------------------
                                       (By)

                                       President
                                       ---------------------
                                       (Title)

    10/6/88                                6/10/88
- ---------------------                  ---------------------
     Date                                   Date


                     SCHEDULE OF LICENSED PATENTS

                                                          Patent
Country         Patent Application No.   Date Filed       Number    Grant Date

United States   7-085,707                8/17/88
Canada                                   8/17/88

PCT
Japan

EPO via PCT
Austria
Belgium
Switzerland
West Germany
France
United Kingdom
Italy
The Netherlands
Luxembourg
Sweden

 

EXHIBIT 10.8

CONFIDENTIAL TREATMENT REQUESTED

AGREEMENT

This Agreement is entered into as of January 31, 1989 ("Effective Date"), by 
and between HOFFMANN-LA ROCHE INC., a New Jersey corporation having offices at 
340 Kingsland Street, Nutley, New Jersey  07110 ("Roche") and PROTEIN DESIGN 
LABS, INC., a Delaware corporation having offices at 3181 Porter Drive, Palo 
Alto, California  94304 ("PDL").

WITNESSETH

WHEREAS, PDL has developed a body of technology relating to humanizing 
antibodies and, in particular, to humanized antibodies against the 
interleukin-2 receptor ("IL-2R");

WHEREAS, Roche has an active research and development program in human 
immunology and desires to obtain rights in and to PDL's proprietary technology 
with respect to these humanized antibodies;

WHEREAS, Roche has proven experience in the development, clinical 
research, registration, manufacturing and marketing of pharmaceutical 
products;

WHEREAS, PDL and Roche have agreed on understandings which will govern a 
scientific collaboration, clinical development program and subsequent 
commercialization on a sole and exclusive basis by Roche set forth in part in 
a Letter of Intent dated January 5, 1989; and

WHEREAS, PDL and Roche now desire that such understandings be embodied 
in a full text, binding agreement;

NOW, THEREFORE, in consideration of the premises and the mutual promises 
and covenants set forth below, PDL and Roche mutually agree as follows:

I.  DEFINITIONS

For the purposes of this Agreement, the following terms, when written 
with an initial capital letter, shall have the meaning ascribed to them below.

1.01    "Affiliate" means any corporation or other business entity 
controlled by, controlling, or under common control with another entity, with 
"control" meaning direct or indirect beneficial ownership of more than fifty 
percent (50%) of the voting stock of, or more than a fifty percent (50%) 
interest in the income of, such corporation or other business entity.

1.02    "Combination Product" means any product containing both an 
ingredient which causes it to be considered a Licensed Product and one or more 
other therapeutically active ingredients.

1.03    "FDA" shall mean the United States Food and Drug Administration.

1.04    "Field" means any humanized or chimeric antibody which binds to 
IL-2R, where "humanized" means a genetically engineered combination of a 
substantially human framework region and constant region, and complementarity 
determining regions from non-human antibodies, and where "chimeric" means a 
genetically engineered combination of a human constant region and non-human 
variable region.  "Antibodies in the Field" means humanized and chimeric 
antibodies which bind to the IL-2R.  It is believed that these Antibodies in 
the Field may be useful for therapeutic, diagnostic, imaging and similar 
purposes.  It is understood that the Field includes, but is not limited to, 
that certain humanized murine monoclonal antibody prepared against the p55 
component of the IL-2R ("humanized anti-Tac").  Furthermore, the Field 
includes, but is not limited to, all improvements relating to humanized anti-
Tac including without limitation modifications in a structure introduced by 
genetic engineering, or by chemical or enzymatic cleavage.  Also included 
within the Field shall be alternate hosts for producing humanized anti-Tac, 
methods for purification, formulations incorporating humanized anti-Tac, and 
uses and methods of use for humanized anti-Tac in human medicine.

1.05    "Initial Commercialization" means the end of the calendar month 
containing the date following FDA approval of the Product License Application 
filed for a Licensed Product for human therapeutic use for prevention of 
kidney transplant rejection or a major disease (within the meaning of 
Milestone #2 in Section 3.02 hereof) on which Roche, its Affiliates or 
sublicensees first sell such a product to an independent third party not an 
Affiliate of the seller in the Territory.

1.06    "Joint Inventions" means any inventions in the Field, whether 
patented or not, which are jointly made during the period beginning on the 
Effective Date and ending one year after termination of the Research Program 
by at least one PDL employee or person contractually required to assign or 
license patent rights covering such inventions to PDL and at least one Roche 
or F. Roche (as defined in Section 1.13) employee or person contractually 
required to assign or license patent rights covering such inventions to Roche 
or F. Roche.

1.07    "Licensed Product" means any product in the Field, including any 
Combination Product, the making, use or sale of which utilizes PDL Know-How, 
PDL Patents or Joint Inventions or would, in the absence of this Agreement, 
infringe a Valid Claim.

1.08    "Net Sales" means the gross invoice price ("GIP") of all Licensed 
Products sold or otherwise disposed of for consideration by Roche, its 
Affiliates or sublicensees to independent third parties not an Affiliate of 
the seller after deducting, if not already deducted, from the amount invoiced:

(a)     the amounts actually allowed as volume or quantity 
discounts, rebates, price reductions, returns (including withdrawals and 
recalls); and

(b)     sales, excise and turnover taxes imposed directly upon and 
actually paid by Roche, its Affiliates or sublicensees.

In addition, there shall be deducted, to the extent not already deducted 
from the amount invoiced, an amount equal to eight percent (8%) of the GIP to 
cover all other expenses or discounts, including but not limited to cash 
discounts, custom duties, transportation and insurance charges and other 
direct expenses.

In the case of Combination Products for which the Licensed Product and 
each of the other therapeutically active ingredients contained in the 
Combination Product have established market price when sold separately, Net 
Sales shall be determined by multiplying the Net Sales for each such 
Combination Product by a fraction, the numerator of which shall be the 
established market price for the Licensed Product(s) contained in the 
Combination Product, and the denominator of which shall be the sum of the 
established market prices for the Licensed Product(s) plus the other active 
ingredients contained in the Combination Product.  When such separate market 
prices are not established, then the parties shall negotiate in good faith to 
determine the method of calculating Net Sales for Combination Products.

If Roche or its Affiliates or sublicensees receive non-cash 
consideration for any Licensed Product sold or otherwise transferred to an 
independent third party not an Affiliate of the seller or transferor, the fair 
market value of such non-cash consideration on the date of the transfer as 
known to Roche, or as reasonably estimated by Roche if unknown, shall be 
included in the definition of Net Sales.

1.09    "PDL Know-How" means, except as otherwise set forth in this 
Section 1.09, all inventions, discoveries, trade secrets, information, 
experience, data, formulas, procedures and results in the Field, and 
improvements thereon, including any information regarding the structure, 
sequence and characterization of Antibodies in the Field, methods of making 
and the characterization of cell lines producing Antibodies in the Field, and 
methods of achieving high levels of expression of Antibodies in the Field, 
which are rightfully held by PDL as of the Effective Date, or which are 
developed or acquired by PDL during the period beginning on the Effective Date 
and ending one year after termination of the Research Program, and which Know-
How is needed for registration, manufacturing, using or selling products in 
the Field; provided, however, that PDL Know-How excludes any Know-How of any 
kind concerning generic methods of designing, developing or preparing 
antibodies including, but not limited to, methods of humanizing antibodies, 
methods of reducing the immunogenicity of antibodies, and methods of 
increasing the affinity of antibodies.

1.10    "PDL Patent" means all patent applications owned or controlled by 
PDL ("Sole PDL Patents") and all patent applications resulting from Joint 
Inventions ("Joint Roche-PDL Patents") containing claims in the Field, which 
are filed prior to or during the term of this Agreement in the United States 
or any foreign jurisdiction, including any addition, continuation, 
continuation-in-part or division thereof or any substitute application 
therefor; any patent issued with respect to such patent application, any 
reissue, extension or patent term extension of any such patent, and any 
confirmation patent or registration patent or patent of addition based on any 
such patent; and any other United States and foreign patent or inventor's 
certificate covering claims in the Field.

1.11    "Research Program" means the collaborative scientific research 
program between PDL and Roche described more fully in Article VI hereof.

1.12    "Roche Inventions" means any inventions in the Field which are 
made during the term of this Agreement by employees of Roche of persons 
contractually required to assign or license patent rights covering such 
inventions to Roche.

1.13    "Territory" means the United States of America and its territories 
and possessions where the patent laws of the United States are in force.  It 
is understood that PDL and Roche's parent company, F. Hoffmann-La Roche & Co. 
Limited Company of Basle, Switzerland ("F. Roche"), are contemporaneously 
entering into a separate license agreement (the "F. Roche Agreement") for all 
countries of the world outside the Territory.

1.14    "Valid Claim" means a claim in any issued patent within the PDL 
Patents which has not been disclaimed or held unenforceable or invalid by a 
decision of a court or governmental agency of competent jurisdiction by a 
decision beyond right of review.





CONFIDENTIAL TREATMENT REQUESTED

II.  LICENSE GRANT

2.01    License Grant.  PDL grants to Roche and to Roche's Affiliates the 
sole and exclusive right to the PDL Know-How and the PDL Patents, but only to 
the extent necessary to make, have made, use and sell Licensed Products in the 
Field within the Territory.  For so long as Roche is in compliance with its 
obligations under Section 7.01 hereof, Roche may sublicense the right to make, 
have made, use and sell Licensed Products in the Field within the Territory, 
but no other rights may be sublicensed.  Any such sublicense shall be subject 
to the Section 4.05 hereof, and shall terminate automatically if Roche or F. 
Roche shall not have remedied or initiated steps to remedy a breach of 
Section 7.01 hereof or Section 5.01 of the F. Roche Agreement, respectively, 
in a manner reasonably satisfactory to PDL within sixty (60) days after 
receipt by Roche of notice of such breach from PDL.

2.02    Identification of Patents.  Set forth on Appendix A is a list 
identifying patents or patent applications which comprise Sole PDL Patents.  
PDL shall update this list by delivering a supplement to Roche no less 
frequently than once per year during the term of this Agreement.

III.  MILESTONES AND PAYMENTS

3.01    Kidney Transplant Indication.

  (a)  Roche agrees to pay PDL each of the Milestone Payments specified 
below upon the occurrence of certain events, immediately with respect to 
Milestone #1 and within thirty (30) days with respect to all other Milestones, 
in accordance with the schedule set forth below:

Milestone #                                                        Payment $(M)

 #1         Full execution and deliver of the Agreements and          [  ]
            delivery of a cell line producing the humanized 
            anti-Tac antibody by PDL to Roche.

 #2         Delivery of a cell line producing an Antibody in the      [  ]
            Field at greater than or equal to [   ] ug/ml.        (plus maximum
            Determination of yield shall be made for production   bonus of [ ])
            at Roche's facility under scale-up conditions, using 
            media to be mutually agreed upon.  A [   ] shall be 
            paid for each 1 ug/ml greater than [   ] ug/ml, with 
            maximum total bonus payments of [   ].  Any bonus 
            payments shall be made upon making yield 
            determinations at both six months and twelve months 
            from the Effective Date.

 #3         Demonstration of reduced [                ] in            [  ] 
            monkey test for Antibody in the Field compared to 
            the murine anti-Tac antibody.

 #4         [              ]                                          [  ]

 #5         Initial demonstration in human clinical trials that       [  ]
            an Antibody in the Field can be safely administered 
            in multiple dose protocol.

 #6         Initiation of efficacy studies for an Antibody in         [  ]
            the Field for [        ]             indication.


 #7         Filing of U.S. Product License Application ("PLA")        [  ]
            with the FDA.                                             [  ]

(b) If any Milestone is not achieved (excluding those events which 
trigger a bonus payment under Milestone #2) but Roche elects to proceed to the 
next Milestone, payment for the Milestone not achieved shall be made to PDL at 
the time of payment for such next Milestone.

(c) Once the foregoing Milestone Payments have been paid for kidney 
transplant rejection indication, no further Milestone Payments are due for any 
other transplant rejection indications. 

3.02    Additional Major Non-Transplant Indications.

  Subject to Section 3.01(c), Roche agrees to pay PDL the Milestone 
Payments specified below within thirty (30) days of the occurrence of (or, if 
achieved by PDL, receipt by Roche of notice of) certain events in accordance 
with the schedule set forth below:

Milestone #                                                        Payment $(M)

 #1         IND application opened in the United States for an 
            Antibody in the Field for a major disease (as 
            defined below).
            a.      If filed by Roche.                                [  ]      
            b.      If filed by PDL and Roche conducts further        [  ] 
                    new drug approval testing.

 #2         Roche initiates [          ] for establishing             [  ]
            safety and efficacy of an Antibody in the Field for 
            a major disease such as, for example, Type One 
            diabetes, rheumatoid arthritis, SLE, multiple 
            sclerosis, ankylosing spondylitis, inflammatory 
            bowel disease or any disease where drugs for 
            treating such a disease would not be classified as 
            orphan drugs under then applicable U.S. law.

3.03    Cap on Milestone Payments.  There shall be a cap on total 
Milestone Payments made by Roche to PDL pursuant to Sections 3.01 and 3.02 
hereof, excluding any bonus payments, of Fifteen Million Dollars 
($15,000,000).  If Roche initiates a pivotal study(ies) in the United States 
for a second major disease indication pursuant to Milestone #2 of Section 3.02 
and has not previously paid PDL a total of Fifteen Million Dollars 
(15,000,000) in Milestone Payments under Sections 3.01 and/or 3.02 at the time 
such studies are initiated, then at that time Roche shall pay to PDL the 
difference between Fifteen Million Dollars ($15,000,000) and the total amount 
of Milestone Payments already made to PDL excluding any bonus payments.  If 
Roche conducts clinical trials for a major disease indication and such trials 
proceed faster than clinical trials for the kidney transplant indication (or 
if the kidney transplant indication trials are stopped) then the Milestone 
Schedule and Payments set forth in Section 3.01 are to be applied to such 
other major disease indication in lieu of the Milestone Schedule and Payments 
in Section 3.02 if the remaining Milestone Payments to be made under 
Section 3.01 are greater than [  ].

3.04    Additional Indications Pursued by PDL.  PDL reserves the right to 
conduct clinical trails and otherwise pursue the FDA product license approval 
process for Antibodies in the Field for uses other than kidney transplant 
indication ("Additional Testing"); provided, however, that if PDL undertakes 
Additional Testing, it shall use, and Roche hereby agrees to supply and 
license to PDL at no cost to PDL for this purpose, Antibodies in the Field 
manufactured by Roche; and provided further, that PDL shall regularly consult 
with and inform Roche concerning the Additional Testing and that PDL must 
obtain the prior written consent of Roche to the clinical protocols proposed 
by PDL, which consent shall not be unreasonably withheld.

IV.  ROYALTIES

4.01    Roche agrees to pay PDL royalties for sales of Licensed Products 
and Combination Products according to the schedule and terms set forth below.

(a)     Years 1 through 3.  For the first three (3) years following 
Initial Commercialization of a particular Licensed Product, Roche shall pay 
PDL royalties on the aggregate annual worldwide Net Sales of all Licensed 
Products as follows:

Net Sales ($ in millions)                               Royalty Rate

Up to and including [   ]                               [  ]
Amount in excess of [   ] but not exceeding [   ]       [  ]
Over [   ]                                              [  ]

        For purposes of computing aggregate annual worldwide Net Sales, Roche's 
Net Sales in the Territory will be combined with the Net Sales of F. Roche for 
all countries of the world outside of the Territory.  This same understanding 
is being incorporated into the agreement between PDL and F. Roche concerning 
the sale of Licensed Products outside the Territory.

(b)     Years 4 and Succeeding.  If a Valid Claim covering any 
Licensed Product has been issued in the Territory prior to or during the three 
(3) year period following Initial Commercialization, Roche shall pay PDL 
royalties in accordance with the provisions of Section 4.01(a).  subject to 
Section 4.02 below, if no such Valid Claim has been issued then Roche shall 
pay PDL a royalty rate of [                  ] of the Net Sales in the 
Territory.  In such case, Roche's obligation to pay PDL royalties with respect 
to any particular Licensed Product shall terminate on the tenth anniversary of 
Initial Commercialization of such Licensed Product unless prior to that time 
such Valid Claim has been issued in the Territory, at which time Roche shall 
resume paying PDL royalties at the rates specified in Section 4.01(a) above.

(c)     Expiration After Year [   ].  If there are no Valid Claims, 
Roche's obligation to pay royalties to PDL hereunder shall expire with respect 
to any particular Licensed Product on the [     ] anniversary of the Initial 
Commercialization of such Licensed Product in the Territory.

(d)     Antibodies in the Field Not Provided or Developed by PDL.  
In consideration of the disclosure to Roche of PDL Know-How and cell lines as 
provided for herein, Roche agrees that products incorporating or using 
Antibodies in the Field which are not provided or developed by PDL shall 
nevertheless be conclusively presumed to utilize PDL Know-How.  Accordingly, 
Roche shall pay PDL royalties on sales of each such product in the Territory 
for a period of [     ] years from Initial 


Commercialization of such product in accordance with the terms of 
this Section 4.01, and such sales shall constitute "Net Sales" for purposes 
hereof.

4.02    De Facto Exclusivity.  For purposes of this Article IV, the term 
"de facto exclusivity" means that Roche, together with its Affiliates and 
sublicensees, controls at least [    ] of the market for a particular Licensed 
Product in the Territory as measured by unit sales.  If no Valid Claim has 
been issued in the Territory and Roche does not enjoy de facto exclusivity for 
a Licensed Product at any time after  [      ] years following Initial 
Commercialization, then Roche shall pay PDL a royalty rate of [          ] of 
the Net Sales in the Territory of that product until the [      ] anniversary 
of Initial Commercialization, or until Roche shall acquire de facto 
exclusivity for that product or until such time as a Valid Claim issues in the 
Territory (at which time Roche shall resume paying PDL royalties at the rates 
specified in Sections 4.01(a) or (b) above, whichever is applicable).

4.03    Milestone Payments Credited Against Royalties.  Roche shall have 
the right to credit [   ] of all Milestone Payments, exclusive of bonus 
payments, actually made to PDL in excess of [         ]         against future 
royalties due to PDL pursuant to this Article IV provided that such credits, 
when added to the offset provided for in Section 4.04 below, may not reduce 
the royalties to be paid to PDL to less than fifty percent (50%) of the amount 
which would otherwise be due pursuant to Section 4.01 hereof.

4.04    Offset for Third Party Licenses.

(a)     If PDL and Roche agree in writing that either party must 
obtain a license from an independent third party in order for Roche to 
manufacture, use or sell a Licensed Product or for PDL to fulfill its 
obligations under the Research Program and if PDL and Roche agree upon the 
terms of such license ("Third Party License"), then the parties shall [     ] 
the cost of that license [      ].  Such cost includes license fees and any 
other fixed costs associated with the Third Party License as well as any 
royalties.  The parties then shall, within thirty (30) days, reimburse each 
other in the manner necessary to effect a [           ] of such license fees 
and other fixed costs.  Both parties hereby acknowledge that PDL has obtained 
a required license from the National Technical Information Service ("NTIS") to 
use the anti-Tac antibody prepared against the IL-2R in order to carry out the 
activities anticipated by this Agreement, and that Roche will reimburse PDL 
within thirty (30) days of the Effective Date so that the license fees and 
other fixed costs of the NTIS license will have been [          ].

(b)     PDL's share of the royalties portion of the cost of any 
Third Party License, including the aforementioned license from NTIS, shall be 
(i) accrued against and deducted from any royalties due to PDL from Roche 
pursuant to Sections 4.01 and 4.02 if Roche pays the royalties due 
under the Third Party License to such third party, and (ii) accrued in favor 
of and added to any royalties due to PDL from Roche pursuant to Sections 4.01 
and 4.02 if PDL pays the royalties due under the Third Party License to such 
third party; provided, however, that this addition or offset shall not cause 
PDL's royalties to be reduced under the schedule set forth in Section 4.01 to 
less than [         ] of Net Sales in any year, or under Sections 4.01(b) and
4.02 to less than [     ] if Roche has de facto exclusivity and   [     ] if 
Roche does not have de facto exclusivity, and provided further, that Roche's 
total royalty obligations to PDL under Sections 4.01 and 4.02 when added to 
those royalties payable to third parties pursuant to Third Party Licenses 
shall not exceed [      ] of Net Sales in any year. 

4.05    Sublicenses.  Any Net Sales of a Roche sublicensee shall be 
treated as Net Sales of Roche for purposes of royalty payments hereunder.  If 
Roche shall grant any sublicenses under this Agreement, then Roche shall 
obtain the written commitment of such sublicensees to abide by all applicable 
terms and conditions of this Agreement and Roche shall remain responsible to 
PDL for the performance of any and all terms by such sublicensee.  All such 
sublicenses shall terminate on termination of this Agreement.

4.06    Royalties upon Termination.  If this Agreement is terminated 
pursuant to Sections 11.02, 11.03, or 11.04 below, Roche shall continue to pay 
PDL any royalties earned pursuant to this Article IV prior to the date of 
termination and any royalties earned thereafter as a result of sales under 
Section 11.05.

V.  ACCOUNTING AND PAYMENTS

5.01    Quarterly Royalty Payments and Reports.  Roche agrees to make 
royalty payments and written reports to PDL within forty-five (45) days after 
the end of each calendar quarter covering all sales of Licensed Products by 
Roche, its Affiliates or sublicensees for which invoices were sent during such 
calendar quarter.  Each report shall state:

(a)     for Licensed Products disposed of by sale, the quantity, 
description, Net Sales, GIP and the deductions pursuant to Section 1.08 by 
which such GIP is reduced to Net Sales,

(b)     for Licensed Products disposed of other than by sale, the 
quantity, description, and nature of the disposition, and

(c)     the calculation of royalties due to PDL for such quarter 
pursuant to Section 1.08 and Article IV hereof.

The information contained in each in each such report shall be 
considered confidential and PDL agrees not to disclose such information to any 
third party except as may be required by law, or to PDL's shareholders during 
such time as PDL is a privately-held company pursuant to any contract among 
PDL and such shareholders.  Every other quarterly report shall reconcile 
aggregate annual Net Sales attributable to Roche with aggregate annual 
worldwide Net Sales attributable to F. Roche.  Concurrent with the making of 
each quarterly report, Roche shall include payment due PDL of royalties for 
the calendar quarter covered by such report.

It is understood that pursuant to this provision, only one royalty 
shall be payable on a given unit of Licensed Produce disposed of under this 
Agreement.  In the case of transfers or sales of any
Licensed Product between Roche, F. Roche or an Affiliate or sublicensee of 
Roche or F. Roche, only one royalty payment shall be due, and such royalty 
shall be payable with respect to the sale of such Licensed Product to an 
independent third party not an Affiliate of the seller. 

5.02    Termination Report.  Roche also agrees to make a written report to 
PDL within ninety (90) days after the date on which Roche, F. Roche or their 
Affiliates or sublicensees last sell a Licensed 

Product, stating in such report the same information called for in each 
quarterly report by Section 5.01 for all Licensed Products and Combination 
Products made, sold or otherwise disposed of and upon which were not 
previously reported to PDL.  

5.03    Accounting.  Roche agrees to keep full, clear and accurate records 
for a period of at least three (3) years, or such longer period as may 
coincide with Roche's internal records retention policy, setting forth the 
manufacturing, sales and other disposition of Licensed Products and 
Combination Products sold or otherwise disposed of under the license herein 
granted in sufficient detail to enable 

royalties payable to PDL hereunder to be determined.  Roche further agrees to 
permit its books and records to be examined by an independent accounting firm 
selected by PDL from time to time to the extent necessary to verify reports 
provided for in Sections 5.01 and 5.02 above.  Unless PDL obtains the prior 
written consent of Roche, such accounting firms must be selected from among 
those firms commonly referred to as the "Big Eight" firms in the Territory.  
Such examination is to be made at the expense of PDL, except in the event that 
the results of the audit reveal a discrepancy in favor of Roche of 10% or more 
over the period being audited, in which case reasonable audit fees for such 
examination shall be paid by Roche.

5.04    Methods of Payments.  All payments due to PDL hereunder, plus any 
payments due under Articles III and VI, shall be paid in United States dollars 
by wire transfer to a bank in the United States designated in writing by PDL. 

VI.  RESEARCH PROGRAM

6.01    Term.  The Research Program shall have an initial term of two (2) 
years from the Effective Date.  It may be extended on a year-to-year basis at 
Roche's option, with the areas of scientific research to be mutually agreed 
upon.  The level of quarterly financial support contributed by Roche pursuant 
to Section 6.04 and the numbers of scientific personnel contributed by PDL 
pursuant to Section 6.02 shall remain unchanged by any such extension.  If 
Roche desires not to extend the Research Program beyond its initial term or 
any subsequent term, it shall so notify PDL in writing at least six (6) months 
prior to the expiration of such term.

6.02    PDL Contributions.  PDL agrees to provide the services of an 
annual average of  [   ] full time employees, including scientists and 
technicians, to conduct scientific research in the following areas:
(a)     as a first priority, the delivery to Roche of a cell line 
capable of producing a humanized anti-Tac antibody or antibodies;

(b)     the development of additional Antibodies in the Field;

(c)     the development of Antibodies in the Field which have 
increased binding affinity;
(d)     the development of cell lines expressing Antibodies in the 
Field at high levels; and
(e)     such additional areas as the parties may agree upon, if any. 

6.03    Cell Lines

(a)     PDL agrees to deliver to Roche viable samples of all cell 
lines producing any Antibodies in the Field developed under the research 
activities described in Section 6.02, and to deliver additional samples of 
such cell lines during the term of this Agreement as reasonably required by 
Roche to carry out its activities under this Agreement.  Roche agrees to 
deliver back to PDL viable samples of such cell lines as may be requested by 
PDL.

(b)     Ownership of any cell lines developed under the Research 
Program or delivered to Roche under Milestone #1 of Section 3.01, together 
with their progeny and derivatives, shall remain vested at all times in PDL.

(c)     Roche may only use the cell lines delivered to it under this 
Section 6.03 or under Section 3.01, or their progeny or derivatives or the 
plasmids contained therein, to make, have made, use and sell Licensed Products 
in the Field within the Territory.  Furthermore, the plasmids or parts thereof 
may only be used with the genes encoding antibodies developed or provided by 
PDL pursuant to the terms of this Agreement.

(d)     EXCEPT AS SPECIFICALLY SET FORTH IN SECTION 6.10 BELOW, PDL 
MAKES NO REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER EXPRESS 
OR IMPLIED, WITH RESPECT TO ANY CELL LINES DELIVERED HEREUNDER.  THERE ARE NO 
EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR 
PURPOSE, OR THAT THE USE OF THE CELL LINES DELIVERED TO ROCHE UNDER 
SECTION 3.01 OR THIS SECTION 6.03 WILL NOT INFRINGE ANY PATENT OR OTHER 
RIGHTS. 

6.04    Roche Contributions.  Roche, in consideration of PDL's obligations 
under Section 6.02 hereof, agrees to pay to PDL [          ] per quarter in the 
first year of the Research Program and [      ] per quarter in each subsequent
year of the Research Program in support of its activities.  The first quarter 
of the Research Program shall commence on February 1, 1989, with all 
subsequent quarters commencing on May 1, August 1 and November 1, 
respectively.

6.05    Records.  PDL agrees to keep records for a period of at least four 
(4) years which confirm that the PDL is meeting its obligations under 
Section 6.02 above, and to permit such records to be examined by a 
representative of Roche from time to time to the extent necessary to verify 
the commitment of human resources by PDL set forth in Section 6.02.

6.06    Research Protocol.  PDL agrees to prepare, with the assistance of 
Roche, a statement of scientific goals and research protocols designed to 
support the areas of research set forth in Section 6.02(a)-(d).

6.07    Management and Meetings.  Initially upon entering into this 
Agreement, each party shall nominate a Scientific Coordinator or Coordinators 
who will be responsible for facilitating the exchange of information and 
promoting and monitoring the progress of the Research Program.  The Scientific 
Coordinators shall meet within sixty (60) days following the Effective Date at 
a place to be mutually agreed upon and, thereafter, at locations designated 
alternatively by the parties, approximately every six (6) months, beginning at 
the end of the six month after the first formal meeting and continuing 
thereafter until a final meeting takes place within sixty (60) days after 
termination of the Research Program.  In addition, representatives of the 
parties shall meet informally as the Scientific Coordinators deem appropriate.  
Each party shall pay its own travel and lodging expenses.

6.08    Exchange of Information.  At the outset of this Agreement, Roche 
and PDL shall inform each other, to the extent they have not already done so, 
of such knowledge as they possess in the Field which is necessary for the 
other party to carry out its obligations under this Agreement.  Each party 
will permit access during the Research Program at reasonable times and with 
reasonable frequency to the relevant scientific personnel of the other party.  
The parties agree to inform each other on a timely basis of all results in the 
Field obtained by them during the Research Program to the extent such results 
are necessary for the other party to carry out its obligations under this 
Agreement or to reach the goals of the Research Program.

6.09    Reports.  At least thirty (30) days prior to each of the meetings 
prescribed above, each party shall prepare written progress reports for the 
other party which summarize the reporting party's progress to date in 
achieving the goals of the Research Program.  Following each such meeting, the 
parties shall jointly prepare a report summarizing the discussions and 
conclusions which were held and reached and setting forth plans for the 
Program for the next six months.  A final, comprehensive technical report 
shall be submitted by each party to the other within sixty (60) days after 
expiration or termination of the Research Program.

6.10    Representations of PDL.  PDL represents and warrants to Roche 
that, except as may otherwise be disclosed in writing to Roche:

(a)     PDL has the full right and authority to enter into this 
Agreement;

(b)     to the best knowledge of PDL after reasonable investigation, 
no third party has any right, title or interest in the Sole PDL Patents or PDL 
Know-How as the result of such third party's former employment of any PDL 
employee;

(c)     PDL is not aware of any patent or other proprietary rights 
of third parties which might be infringed by the Sole PDL Patents or the PDL 
Know-How, including cell lines delivered hereunder.

VII.  CERTAIN COVENANTS OF ROCHE

7.01    Diligence.  Upon execution of this Agreement, Roche shall use 
reasonable diligence in proceeding with (i) the development, testing and 
manufacturing of Licensed Products in accordance with the Milestone Schedule 
set forth in Article III hereof, and (ii) the subsequent marketing and sale of 
Licensed Products.  Reasonable diligence as used in this Agreement shall mean 
the same standard of effort used by Roche in the development, testing, 
manufacturing, marketing and sale of its own protein-based products which must 
be approved by the FDA before they can be sold in the Territory.  If Roche 
fails to exercise such diligence, PDL may terminate this Agreement and Roche's 
rights hereunder pursuant to Section 11.04 below.

7.02    Summary Information.  Roche agrees to provide semi-annually to PDL 
summaries of the results of scale-up, GMP manufacturing, pre-clinical and 
clinical trials and other information concerning the Field which is generated 
pursuant to Roche's efforts to complete Milestones #2-7 as set forth in 
Section 3.01 and Milestones #1 and #2 as set forth in Section 3.02. 

VIII.  OWNERSHIP OF TECHNOLOGY

8.01    PDL Technology.  Ownership of the PDL Know-How and Sole PDL 
Patents shall remain vested at all times in PDL.  Notwithstanding the 
provisions of Section 2.01, PDL expressly reserves under this Agreement 
(i) all rights to use the PDL Know-How and Sole PDL Patents to make, have 
made, use and sell anywhere in the world all products not within the Field and 
(ii) the right to use the PDL Know-How and Sole PDL Patents for PDL's internal 
research purposes in the Field.

8.02    Joint Inventions and Joint Roche-PDL Patents.  Ownership of Joint 
Inventions and Joint Roche-PDL Patents shall be vested jointly in PDL and 
Roche.  Roche shall have the exclusive right to make, have made, use or sell 
any Joint Invention or Joint Roche-PDL Patent in the Field within the 
Territory during the term of the Agreement.  Both parties shall have the non-
exclusive right to make, have made, use or sell any Joint Invention or Joint 
Roche-PDL Patent outside the Field during the term of the Agreement, and 
neither party shall be obligated to account to the other for such use.  Upon 
the expiration or termination of the Agreement, both parties shall have the 
non-exclusive right to make, have made, use or sell any Joint Invention or 
Joint Roche-PDL Patent without restriction and without any obligation to 
account to the other party for such use.  Notwithstanding the foregoing or the 
provisions of Section 2.01, PDL expressly reserves the right to use Joint 
Inventions and Joint Roche-PDL Patents for PDL's internal research purposes in 
the Field.

8.03    Roche Inventions.  PDL hereby acknowledges that this Agreement 
does not grant PDL any ownership rights in the Roche Inventions.

IX.  INVENTIONS

9.01    Sole PDL Patents.  PDL agrees to prosecute and reasonably maintain 
all of the patents and applications included within the Sold PDL Patents.  PDL 
shall bear [            ] costs and expenses for such prosecution and 
maintenance except for the costs and expenses of foreign filings for such 
patents which are to be borne by F. Roche in accordance with the terms of the 
F. Roche Agreement.  At PDL's reasonable request, Roche shall cooperate, in 
all reasonable ways, in connection with the prosecution of all patent 
applications included within the Sole PDL Patents.  Should PDL decide that it 
is no longer interested in maintaining or prosecuting a Sole PDL Patent, it 
shall promptly advise Roche thereof and, at the request of Roche, PDL and 
Roche shall negotiate in good faith to determine an appropriate course of 
action in the interests of both parties.  If any  Sole PDL Patents are 
assigned to Roche, Roche will thereafter prosecute and reasonably maintain 
such at Roche's own cost to the extent that Roche desires to do so.

9.02    Joint Inventions.

(a)     PDL will have the first right of election to file priority 
patent applications for Joint Inventions in any country in the world.  If PDL 
declines to file such applications then Roche may do so.  Regardless of which 
party files a priority patent application, however, any claims covered by such 
applications shall be considered as part of the PDL Patents for the purpose of 
defining a Valid Claim under this Agreement.

(b)     The party not performing the priority patent filings for 
Joint Inventions pursuant to this Section 9.02 undertakes without cost to the 
filing party to obtain all necessary assignment documents for the filing 
party, to render all signatures which shall be necessary for such patent 
filings and to assist the filing party in all other reasonable ways which are 
necessary for the issuance of the patents involved as well as for the 
maintenance and prosecution of such patents.  The party not performing the 
patent filings shall upon request be authorized by the other party to have 
access to the files concerning such patents in any patent offices in the 
world.

(c)     The party performing the priority patent filings for Joint 
Inventions pursuant to this Section 9.02 undertakes to perform the 
corresponding convention filings from case to case, after having discussed the 
countries for foreign filings with the other party; provided, however, that, 
pursuant to the F. Roche Agreement, F. Roche is to bear any costs associated 
with such foreign filings regardless of which party performs such filings.

9.03    General Procedures.  The parties shall observe the following 
procedures for patent applications for inventions arising from this Agreement:

(a)     As soon as one of the parties concludes that it wishes to 
file a patent application covering an invention in the Field, it shall 
immediately inform the other party thereof and consult about the filing 
procedures concerning such patent application.  For this purpose, such party 
will provide the other party with the determination of inventors and scope of 
claims as early as possible.  Should a party be faced with possible loss of 
rights, such communications may take place promptly after filing a convention 
application.

(b)     Except as set forth in Sections 9.01 and 9.02 with respect 
to the costs of foreign filings, the party performing any priority patent 
filings as described above shall be obliged to prosecute and reasonably 
maintain such applications and any patents resulting therefrom and will have 
to bear the costs associated therewith.  On request of the party performing 
the filing, the other party will cooperate, in all reasonable ways, in 
connection with the prosecution of all such patent applications relating to 
inventions.  The party performing the filing shall advise the other party of 
any substantial action or development in the prosecution of its patent 
applications and patents, in particular of the question of scope, the issuance 
of, or the rejection of, an interference involving or an opposition to any 
respective patent application or patent.

(c)     Inventions and other intellectual property made by either 
party outside the Field shall be excluded from the provisions of this 
Agreement and shall belong solely to the party having made the invention or 
other intellectual property.

X.  ENFORCEMENT OF PATENTS

10.01   Sole PDL Patents.  In the event of any action against a third 
party for infringement of any claim in any issued patent within the Sole PDL 
Patents, or the institution by a third party of any proceedings for the 
revocation of any such claim, each party will notify the other promptly and, 
following such notification, the parties shall confer.  PDL shall have the 
right, but shall not be obligated, to prosecute such actions or to defend such 
proceedings at its own expense, in its own name and entirely under its own 
direction and control.  Roche will reasonably assist PDL in such actions or 
proceedings if so requested, and will lend its name to such actions or 
proceedings if requested by PDL or required by law.  PDL will pay or reimburse 
Roche for all costs, expenses and liabilities which Roche may incur or suffer 
in affording assistance to such actions or proceedings.  If PDL elects not to 
bring any action for infringement or to defend any proceeding for revocation 
of any claims in any issued patent within the Sole PDL Patents within ninety 
(90) days of being requested by Roche to do so, Roche may bring such action or 
defend such proceeding at its own expense, in its own name and entirely under 
its own direction and control.  PDL will reasonably assist Roche in any action 
or proceeding being prosecuted or defended by Roche, if so requested by Roche 
or required by law.  Roche will pay or reimburse PDL for all costs, expenses 
and liabilities which PDL may incur or suffer in affording assistance to such 
actions or proceedings.  No settlement of any such action or defense which 
restricts the scope or affects the enforceability of PDL Know-How or Sole PDL 
Patents may be entered into by either PDL or Roche without the prior consent 
of the other party hereto, which consent, in the case of Roche shall not be 
unreasonably withheld and in the case of PDL may be withheld in PDL's sole and 
absolute discretion.

If either party elects to bring an action for infringement or to defend 
any proceedings for revocation of any claims pursuant to this Section 10.01 
and subsequently ceases to continue or withdraws from such action or defense, 
it shall forthwith so notify the other party and the other party may 
substitute itself for the withdrawing party and the parties' respective rights 
and obligations under this Section 10.01 shall be reversed.

10.02   Joint Roche-PDL Patents.  In the event of any action against a 
third party for infringement of any claim in any issued patent within the 
Joint Roche-PDL Patents, or the institution by a third party of any 
proceedings for the revocation of any such claim, each party will notify the 
other promptly and, following such notification, the parties shall confer to 
determine whether either or both parties shall control the prosecution or 
defense of such action or proceeding and who shall bear the costs thereof.  If 
the parties are unable to reach agreement within ninety (90) days of the 
notification referred to above, then each party shall have the right to bring 
such action or defend such proceeding at its own expense, in its own name and 
entirely under its own direction and control; provided, however, that if both 
parties elect to prosecute or defend, each party shall bear its own expenses 
but both parties shall have equal control over such prosecution or defense.  
No settlement of any action or defense which restricts the scope or affects 
the enforceability of Joint Roche-PDL Patents may be entered into by either 
PDL or Roche without the prior consent of the other party hereto, which 
consent shall not be unreasonably withheld.

10.03   Distribution of Proceeds.  In the event either party exercises the 
rights conferred in Section 10.01 or 10.02 hereof, and recovers any damages or 
other sums in such action, suit or proceeding or in settlement thereof, such 
damages or other sums recovered, shall first be applied to all costs and 
expenses connected therewith including reasonable attorneys fees, necessarily 
involved in the prosecution and/or defense of any suit or proceeding, and if 
after such reimbursement any funds shall remain from such damages or other 
sums recovered, said recovery shall belong to the party exercising its rights; 
provided, however, that any remaining recovery by Roche shall be shared, with 
seventy-five percent (75%) being retained by Roche and twenty-five percent 
(25%) being paid to PDL.

10.04   Defense of Infringement Actions.  Roche shall defend at its own 
cost any infringement suit that may be brought against PDL or Roche on account 
of the development, manufacture, production, use or sale of any Licensed 
Product, and shall indemnify and save PDL harmless against any such patent or 
other infringement suits, and any claims, losses, damages, liabilities, 
expenses, including reasonable attorneys' fees and cost, which may be incurred 
by PDL therein or in settlement thereof.  Any and all settlements which 
restrict the scope or enforceability of PDL Know-How or Sole PDL Patents must 
be approved by PDL in its sole and absolute discretion before execution by 
Roche.  Any and all settlements which restrict the scope or enforceability of 
Joint Roche-PDL Patents must be approved by PDL before execution by Roche, 
such approval not to be unreasonably withheld.  PDL shall not be required to 
approve any settlement which does not include as a condition thereof the 
granting to PDL of a full and unconditional release of claims.  PDL will use 
its best efforts to avoid knowingly infringing any patents of third parties in 
PDL's design of the cell lines being delivered to Roche hereunder, and PDL 
will inform Roche of any such potential infringement promptly upon PDL's 
becoming aware of such potential infringement.

10.05   Right to Counsel.  Each party to this Agreement shall always have 
the right to be represented by counsel of its own selection and its own 
expense in any suit or other action instituted by the other for infringement, 
under the terms of this Agreement.



XI.  TERM AND TERMINATION

11.01   Term.   Unless earlier terminated pursuant to the terms of this 
Article XI, this Agreement shall remain in effect until the later of (a) the 
date of expiration of the last to expire of any Valid Claims or (b) the date 
of the [   ] anniversary of the Initial Commercialization of the last Licensed 
Product to be introduced by Roche hereunder, at which time this Agreement 
shall automatically expire.

11.02   Termination by Mutual Agreement.        This Agreement may be 
terminated by the written agreement of the parties.

11.03   Termination by Roche.  Roche may terminate this Agreement upon 
ninety (90) days written notice to PDL; however, any such termination prior to 
the end of the initial two-year term of the Research Program shall not relieve 
Roche of its obligations under Section 6.04 to make quarterly payments to PDL 
for the full two-year period provided in Section 6.01.

11.04   Termination by Default.  If either party defaults in the 
performance of, or fails to be in compliance with, any material agreement, 
condition or covenant of this Agreement, the party not in default may 
terminate this Agreement at its option; provided, however, that if such event 
of default or non-compliance is the first occurrence of an event giving rise 
to the right of termination pursuant to this Section 11.04, the non-defaulting 
party may terminate this Agreement only if such default or noncompliance shall 
not have been remedied, or steps initiated to remedy the same to the other 
party's reasonable satisfaction within sixty (60) days after receipt by the 
defaulting party of a written notice thereof from the other party.  If PDL 
terminates the F. Roche Agreement pursuant to Section 7.04 thereof, PDL may 
elect to simultaneously terminate this Agreement upon written notice to Roche.  
If F. Roche terminates the F. Roche Agreement pursuant to Section 7.04 
thereof, Roche may elect to simultaneously terminate this Agreement upon 
written notice to PDL.

11.05   Inventory.  Upon termination of this Agreement, PDL hereby grants 
Roche a license to sell within one (1) year of such termination any Licensed 
Products in Roche's or its Affiliates or sublicensee's inventory on the date 
of such termination, which have not previously been sold ("Inventory"); 
provided, however that Roche shall pay the royalties due on such Inventory in 
the amounts and manner provided for in Articles IV and V.

11.06   Return of Materials and Information.  Subject to Section 12.05 
hereof concerning archival copies, upon termination of this Agreement by Roche 
pursuant to Section 11.03 or by either or both parties pursuant to 
Sections 11.02 or 11.04:  (a) Roche forthwith shall return to PDL all cell 
lines and their progeny, antibodies and other biological materials provided to 
Roche by PDL under this Agreement, as well as complete copies of all data and 
results of scale-up, GMP manufacturing, pre-clinical and clinical trials and 
other information generated pursuant to Roche's efforts to complete 
Milestones #2-7 as set forth in Section 3.01 above and Milestones #1-2 as set 
forth in Section 3.02 above; and (b) PDL forthwith shall return to Roche all 
scientific instruments and materials and related information provided to PDL 
by Roche under this Agreement.

11.07   Rights and Obligations on Termination or Expiration.  Unless 
expressly provided to the contrary, the provisions of Sections 4.07, 9.04 and 
Articles V, X, XII, XIII, and XV (and, if applicable under Section 11.03, the 
payment obligations of Roche under Section 6.04), shall survive the 
termination of this Agreement.  Upon the expiration of this Agreement pursuant 
to Section 11.01 above, if it is not otherwise terminated pursuant to this 
Article XI, PDL shall grant to Roche a non-exclusive, royalty-free license to 
use the PDL Know-How and Sole PDL Patents and cell lines delivered pursuant to 
Section 6.03, but only to the extent necessary to make, have made, use and 
sell Licensed Products in the Field.

11.08   Archival Copies.  Section 11.06 notwithstanding, each party shall 
be entitled to keep for archival purposes one copy of all written materials 
returned to the other party pursuant to Section 11.06.

XII.  CONFIDENTIALITY, DISCLOSURE AND PUBLICATIONS

12.01   Prior Agreements.  This Agreement supersedes that certain 
Confidential Disclosure Agreement entered into between PDL and Roche on 
August 29, 1988.

12.02   Confidentiality.  During the term of this Agreement and for a 
period of five (5) years following expiration or termination of this 
Agreement, each party shall maintain in confidence all information and 
materials including, but not limited to, cell lines, their progeny, and 
antibodies, disclosed by the other party hereto which such party knows or has 
reason to know are or contain trade secrets or other proprietary information 
of the other, including, without limitation, information relating to the PDL 
Know-How, PDL Patents, Joint Inventions and inventions of the other party, and 
the business plans of the other party, including, without limitation, 
information provided by either party to the other party hereto prior to the 
Effective Date, and shall not use such trade secrets or proprietary 
information for any purpose, including, without limitation, for the purpose of 
developing products in the Field except as permitted by this Agreement or 
disclose the same to anyone other than those of its Affiliates, sublicensees, 
employees, consultants, agents or subcontractors as are necessary in 
connection with such party's activities as contemplated in this Agreement.  
Each party shall obtain a written agreement from any sublicensees, employees, 
consultants, agents and subcontractors, prior to disclosure, to hold in 
confidence and not make use of such trade secrets or proprietary information 
for any purpose other than those permitted by this Agreement.  Notwithstanding 
the foregoing sentence, with respect to employees or consultants of a party or 
such party's Affiliates who have signed a confidentiality agreement in favor 
of such party or Affiliate as employer, if such confidentiality agreement 
binds the employee or consultant to protect proprietary information disclosed 
hereunder to the same extent (or greater) as required by this Section 12.02, 
then it shall be sufficient for the employing party to (a) notify such 
employees or consultants of the fact that information disclosed hereunder is 
governed by such confidentiality agreements and (b) identify to such employees 
the information which is so governed.  Each party shall be responsible for 
ensuring compliance with these obligations by such party's Affiliates, 
sublicensees, employees, consultants, agents and subcontractors.  Each party 
shall use a similar effort to that which it uses to protect its own most 
valuable trade secrets or proprietary information to ensure that its 
Affiliates, sublicensees, employees, consultants, agents and subcontractors do 
not disclose or make any unauthorized use of trade secrets or proprietary 
information of the other party hereto.  Each party shall notify the other 
promptly upon discovery of any unauthorized use or disclosure of the other's 
trade secrets or proprietary information.

12.03   Exceptions.  The obligation of confidentiality contained in this 
Agreement shall not apply to the extent that (a) either party (the 
"Recipient") is required to disclose information by order or regulation of a 
governmental agency or a court of competent jurisdiction or (b) the Recipient 
can demonstrate that (i) the disclosed information was at the time of such 
disclosure by the Recipient already in the public domain other than as a 
result of actions of the Recipient, its Affiliates, employees, licensees, 
agents or subcontractors, in violation hereof; (ii) the disclosed information 
was rightfully known by the Recipient or its Affiliates (as shown by its 
written records) prior to the date of disclosure to the Recipient in 
connection with the negotiation, execution or performance of this Agreement; 
or (iii) the disclosed information was received by the Recipient or its 
Affiliates on an unrestricted basis from a source unrelated to any party to 
this Agreement and not under a duty of confidentiality to the other party, or 
(c) disclosure is made to the FDA as part of the FDA's product license 
approval process.

12.04   Publications.  Prior to public disclosure or submission for 
publication of a manuscript describing the results of any aspect of the 
Research Program or other scientific activity or collaboration between PDL and 
Roche in the Field, the party disclosing or submitting such a manuscript 
("Disclosing Party") shall send the other party ("Responding Party") by 
express air-mail a copy of the manuscript to be submitted and shall allow the 
Responding Party a reasonable time period (not to exceed sixty (60) days from 
the date of mailing) in which to determine whether the manuscript contains 
subject matter of which patent protection should be sought (prior to 
publication of such manuscript) for the purpose of protecting an invention 
conceived or developed in connection with the PDL/Roche scientific 
collaboration, or whether the manuscript contains confidential information 
belonging to the Responding Party.  After the expiration of sixty (60) days 
from the date of mailing such manuscript, the Disclosing Party shall be free 
to submit such manuscript for publication and publish or otherwise disclose to 
the public such research results.  Should the Responding Party believe the 
subject matter of the manuscript contains confidential information or a 
patentable invention of substantial commercial value to the Responding Party, 
then prior to the expiration of sixty (60) days from the date of mailing of 
such manuscript to it by the Disclosing Party, the Responding Party shall 
notify the Disclosing Party in writing of its determination that such 
manuscript contains such information or subject matter for which patent 
protection should be sought. Upon receipt of such written notice from the 
Responding Party, the Disclosing Party shall delay public disclosure of such 
information or submission of the manuscript for an additional period of sixty 
(60) days to permit preparation and filing of a patent application on the 
disclosed subject matter.  The Disclosing Party shall thereafter be free to 
publish or disclose such information, except that the Disclosing Party may not 
disclose any confidential information of the Responding Party in violation of 
Sections 12.02 and 12.03 hereof.  Each Party agrees to give the other party 
reasonable opportunity to review and comment on any proposed publication 
arising from the research collaboration between the parties.  Determination of 
authorship for any paper or patent shall be in accordance with accepted 
scientific practice.  Should any questions on authorship arise, this will be 
determined by good faith consultation between the Scientific Coordinators.

XIII.  DISPUTE RESOLUTION

13.01   Arbitration.  Any claim, dispute or controversy arising out of or 
in connection with or relating to this agreement or the breach or alleged 
breach thereof shall be submitted by the parties to arbitration by the 
American Arbitration Association in Santa Clara County, California under the 
commercial rules then in effect for that Association except as provided 
herein.  All proceedings shall be held in English and a transcribed record 
prepared in English.  The parties shall choose, by mutual agreement, one 
arbitrator within thirty (30) days of receipt of notice of the intent to 
arbitrate.  If no arbitrator is appointed within the times herein provided or 
any extension of time which is mutually agreed upon, the Association shall 
make such appointment within thirty (30) days of such failure.  The award 
rendered by the arbitrator shall include costs of arbitration, reasonable 
attorneys' fees and reasonable costs for expert and other witnesses, and 
judgment on such award may be entered in any court having jurisdiction 
thereof.  The parties shall be entitled to discovery as provided in 
Sections 1283.05 and 1283.1 of the Code of Civil Procedure of the State of 
California, whether or not the California Arbitration Act is deemed to apply 
to said arbitration.  Nothing in this Agreement shall be deemed as preventing 
either party from seeking injunctive relief (or any other provisional remedy) 
from any court having jurisdiction over the parties and the subject matter of 
the dispute as necessary to protect either party's name, proprietary 
information, trade secrets, know-how or any other proprietary right.  If the 
issues in dispute involve scientific or technical matters, any arbitrator 
chosen hereunder shall have educational training and/or experience sufficient 
to demonstrate a reasonable level of knowledge in the field of biotechnology.  
Judgment upon the award rendered by the arbitrator may be entered in any court 
having jurisdiction thereof.

13.02   Use of Scientific Coordinators.  Both parties shall endeavor to 
resolve any disputes emerging out of the activities of the Research Program or 
Article III by first having the respective Scientific Coordinators meet to 
discuss such disputes.

XIV.  FORCE MAJEURE

14.01   If either party shall be delayed, interrupted in or prevented from 
the performance of any obligation hereunder by reason of force majeure 
including an act of God, fire, flood, earthquake, war (declared or 
undeclared), public disaster, strike or labor differences, governmental 
enactment, rule or regulation, or any other cause beyond such party's control, 
such party shall not be liable to the other therefor; and the time for 
performance of such obligation shall be extended for a period equal to the 
duration of the contingency which occasioned the delay, interruption or 
prevention.  The party invoking such force majeure rights of this subparagraph 
must notify the other party by registered letter within a period of fifteen 
(15) days, from the first and last day of the force majeure unless the force 
majeure renders such notification impossible in which case notification will 
be made as soon as possible.  If the delay resulting from the force majeure 
exceeds six (6) months, both parties shall consult together to find an 
appropriate solution.

XV.  MISCELLANEOUS

15.01   Assignment.  This agreement and the licenses herein granted other 
than the aforementioned agreement between PDL and F. Roche relating to the 
same Field but outside the Territory shall be binding upon and shall inure to 
the benefit of, successors of the parties hereto, or to an assignee of all of 
the good will and entire business and assets of a party hereto relating to 
pharmaceutical and veterinary products but shall not otherwise be assignable 
without the prior written consent of the other party, which consent will not 
be unreasonably withheld.

15.02   Entire Agreement.  This Agreement and the F. Roche Agreement 
constitute the entire Agreement between the parties hereto with respect to the 
within subject matter and supersede all previous Agreements, whether written 
or oral.  This Agreement shall not be changed or modified orally, but only by 
an instrument in writing signed by both parties.

15.03   Severability.  If any provision of this Agreement is declared 
invalid by an arbitrator pursuant to Section 13.01 or by a court of last 
resort or by any court from the decision of which an appeal is not taken 
within the time provided by law, then and in such event, this Agreement will 
be deemed to have been terminated only as to the portion thereof which relates 
to the provision invalidated by that decision and only in the relevant 
jurisdiction, but this Agreement, in all other respects and all other 
jurisdictions, will remain in force; provided, however, that if the provision 
so invalidated is essential to the Agreement as a whole, then the parties 
shall negotiate in good faith to amend the terms hereof as nearly as practical 
to carry out the original interest of the parties, and, failing such 
amendment, either party may submit the matter to arbitration for resolution 
pursuant to Section 13.01.

15.04   Indemnification.  Roche shall defend, indemnify and hold harmless 
PDL, its trustees, officers, agents and employees harmless from any and all 
liability, demands, damages, expenses, and losses of any kind, including those 
resulting from death, personal injury, illness or property damage arising 
(i) out of the manufacture, distribution, use, testing, sale or other 
disposition, by Roche, an Affiliate of Roche, or any distributor, customer, 
sublicensee or representative of Roche or anyone in privity therewith, of any 
Licensed Product, or any cell lines, their progeny, or other biological 
materials, method, process, device or apparatus licensed or provided by PDL to 
Roche hereunder, or (ii) as a result of practicing a Joint Invention, or using 
PDL Know-How or PDL Patents licensed to Roche under this Agreement, except 
where such claim is based on the negligent acts of commission or omission of 
PDL.

15.05   Notices.  Any notice or report required or permitted to be given 
under this Agreement shall be in writing and shall be mailed by United States 
mail, or telexed or telecopied and confirmed by mailing, as follows and shall 
be effective five (5) days after such mailing:

        If to PDL:      Protein Design Labs, Inc.
                        3181 Porter Drive
                        Palo Alto, California 94304
                        Attention: President

        Copy to:        Ware & Freidenrich
                        400 Hamilton Avenue
                        Palo Alto, California 94301-1809
                        Attention:  Marta L. Morando, Esq.

        If to Roche:    Hoffmann-La Roche Inc.
                        340 Kingsland Street
                        Nutley, New Jersey 07110
                        Attention:  Corporate Secretary

15.06   Choice of Law.  The validity, performance, construction, and 
effect of this Agreement shall be governed by the laws of the State of 
California.

15.07   Publicity.  Both parties agree to issue mutual press releases 
concerning their entry into this Agreement, with the content of such releases 
to be approved in advance by both parties.  In all other respects, neither 
party shall use the name of the other party in any publicity release without 
the prior written permission of such other party, which shall not be 
unreasonably withhold.  The other party shall have a reasonable opportunity to 
review and comment on any such proposed publicity release.  Except as required 
by law, neither party shall publicly disclose the terms of this agreement or 
its terms and conditions unless expressly authorized to do so by the other 
party which authorization shall not be unreasonably withheld.  In the event 
that disclosure shall be agreed upon then the parties will work together to 
develop a mutually acceptable disclosure.

15.08   Headings.  The captions used herein are inserted for convenience 
of reference only and shall not be construed to create obligations, benefits, 
or limitations.

15.09   Counterparts.  This Agreement may be executed in counterparts, all 
of which taken together shall be regarded as one and the same instrument.


IN WITNESS WHEREOF, the parties have executed this Agreement to be 
effective as of the Effective Date.


PROTEIN DESIGN LABS, INC.
By:   /s/  Laurence Jay Korn             
Title:     President 
Date:  16 March 1989

HOFFMANN-LA ROCHE, INC.
By:  /s/  Irwin Lerner
Title:  President and CEO
Date:  March 16, 1989


                                    APPENDIX A
                                 Sole PDL Patents
T&T
DOCKET
NO.         TITLE                INVENTORS      FILING DATE    SERIAL NO. STATUS

11823-1     Closing and          Tso and Queen  Dec. 15, 1987  132,387   Pending
            Expressions of 
            Phospholipase C 
            Genes

11823-4     IL-2 Receptor-       Queen          Apr. 15, 1988  182,682   Pending
            Specific
            Chimeric Antibodies

11823-5     Chimeric Antibody    Queen          Sep. 28, 1988  233,037   Pending
            Production

11823-7     Cellular Toxic       Queen          Nov. 23, 1988  275,462   Pending
            Conjugates

11823-7-1   Cellular Toxic       Queen,         Dec. 15, 1988  PCT/US88/ Pending
(Comb. of   Conjugates           Chovnick,      (Canada & PCT  04493
`387 and                         Schneider and  for Japan &  
`462)                            Tso            EPO)

11823-7-2   Cellular Toxic       Queen,         Dec. 28, 1988  290,968   Pending
(Comb. of   Conjugates           Chovnick,
`387 and                         Schneider and
`462)                            Tso 

11823-8     Novel IL-2           Queen and      Dec. 28, 1988  290,975   Pending
            Receptor Specific    Selleck
            Human 
            Immunoglobulins

11823-9     Humanized            Queen          Feb. 13, 1989  310,252   Pending
            Antibody 
            Production

 

EXHIBIT 10.9

CONFIDENTIAL TREATMENT REQUESTED

AGREEMENT

This Agreement is entered into as of January 31, 1989 ("Effective 
Date"), by and between F. HOFFMANN-LA ROCHE & CO. LIMITED COMPANY of Basle, 
Switzerland ("F. Roche) and PROTEIN DESIGN LABS, INC., a Delaware corporation 
having offices at 3181 Porter Drive, Palo Alto, California  94304 ("PDL").

WITNESSETH
WHEREAS, PDL has developed a body of technology relating to humanizing 
antibodies and, in particular, to humanized antibodies against the 
interleukin-2 receptor ("IL-2R");

WHEREAS, PDL and Hoffmann-La Roche Inc. ("Roche"), a New Jersey 
corporation, are contemporaneously entering into an agreement ("PDL/Roche 
Agreement") which will govern a scientific collaboration, clinical development 
program and subsequent commercialization in the Roche Territory (as defined in 
Section 1.13 hereof) of pharmaceutical products based on PDL's proprietary 
technology relating to such humanized antibodies;

WHEREAS, F. Roche has proven experience in the development, clinical 
research, registration, manufacturing and marketing of pharmaceutical 
products;

WHEREAS, PDL and F. Roche desire F. Roche to register and market such 
pharmaceutical products in countries of the world outside the Roche Territory, 
and now wish to embody their mutual understandings in a full text, binding 
agreement;

NOW THEREFORE, in consideration of the premises and the mutual promises 
and covenants set forth below, PDL and F. Roche mutually agree as follows:

I.  DEFINITIONS

For the purposes of this Agreement, the following terms, when written 
with an initial capital letter, shall have the meaning ascribed to them below.

1.01    "Affiliate" means any corporation or other business entity 
controlled by, controlling, or under common control with a party to this 
Agreement through common share holdings, with "control" meaning direct or 
indirect beneficial ownership of more than fifty percent (50%) of the voting 
stock of, or more than a fifty percent (50%) interest in the income of, such 
corporation or other business entity; and any corporation in which the maximum 
amount of stock permitted by law to be held by another entity is beneficially 
owned, directly or indirectly, by F. Roche.

1.02    "Combination Product" means any product containing both an 
ingredient which causes it to be considered a Licensed Product and one or more 
other therapeutically active ingredients.

1.03    "Field" means any humanized or chimeric antibody which binds to 
the IL-2R, where "humanized" means a genetically engineered combination of a 
substantially human framework region and constant region, and complementarity 
determining regions from non-human antibodies, and where "chimeric" means a 
genetically engineered combination of a human constant region and non-human 
variable region.  "Antibodies in the Field" means humanized and chimeric 
antibodies which bind to the IL-2R.  It is believed that these Antibodies in 
the Field may be useful for therapeutic, diagnostic, imaging and similar 
purposes.  It is understood that the Field includes, but is not limited to, 
that certain humanized murine monoclonal antibody prepared against the p55 
component of the IL-2R ("humanized anti-Tac").  Furthermore, the Field 
includes, but is not limited to, all improvements relating to humanized anti-
Tac including without limitation modifications in structure introduced by 
genetic engineering, or by chemical or enzymatic cleavage.  Also included 
within the Field shall be alternate hosts for producing humanized anti-Tac, 
methods for purification, formulations incorporating humanized anti-Tac, and 
uses and methods of use for humanized anti-Tac in human medicine.

1.04    "Initial Commercialization" means the end of the calendar month 
containing the date following the granting of Regulatory Approval (as defined 
in Section 1.10 hereof) for a Licensed Product for human therapeutic use for 
prevention of kidney transplant rejection or a major disease (within the 
meaning of Milestone #2 in Section 3.02 of the PDL/Roche Agreement) on which 
F. Roche, its Affiliates or sublicensees first sell such a product to an 
independent third party not an Affiliate of the seller in a major market 
within the Territory, where "major market" means either Japan or two of the 
following three countries:  France, Italy or the United Kingdom.

1.05    "Joint Inventions" means any inventions in the Field, whether 
patented or not, which are jointly made during the period beginning on the 
Effective Date and ending one year after termination of the Research Program 
(as defined in Section 1.11 hereof) by at least one PDL employee or person 
contractually required to assign or license patent rights covering such 
inventions to PDL and at least one F. Roche or Roche employee or person 
contractually required to assign or license patent rights covering such 
inventions to F. Roche or Roche.

1.06    "Licensed Product" means any product in the Field, including any 
Combination Product, the making, use or sale of which utilizes PDL Know-How, 
PDL Patents or Joint Inventions or would, in the absence of this Agreement, 
infringe a Valid Claim.

1.07    "Net Sales" means the gross invoice price ("GIP") of all Licensed 
Products sold or otherwise disposed of for consideration by F. Roche, its 
Affiliates or sublicensees to independent third parties not an Affiliate of 
the seller, as computed in the central F. Roche Swiss Francs Sales Statistics 
for the countries concerned, whereby the amount of such sales in foreign 
currencies is converted into Swiss Francs at the average monthly rate of 
exchange at the time, after deducting, if not already deducted, from the 
amount invoiced:

(a)     the amounts actually allowed as volume or quantity 
discounts, sales rebates (including cash discounts), price reductions, returns 
(including withdrawals and recalls); and

(b)     sales, excise and turnover taxes imposed directly upon and 
actually paid by F. Roche, its Affiliates or sublicensees.

In addition, there shall be deducted, to the extent not already deducted 
from the amount invoiced, an amount equal to seven percent (7%) of the GIP to 
cover all other expenses or discounts, including but not limited to customs 
duties, transportation and insurance charges and other direct expenses.

In the case of Combination Products for which the Licensed Product and 
each of the other therapeutically active ingredients contained in the 
Combination Product have established market prices when sold separately, Net 
Sales shall be determined by multiplying the Net Sales for each such 
Combination Product by a fraction, the numerator of which shall be the 
established market price for the Licensed Product(s) contained in the 
Combination Product, and the denominator of which shall be sum of established 
market prices for the Licensed Product(s) plus the other active ingredients 
contained in the Combination Product.  When such separate market prices are 
not established, then the parties shall negotiate in good faith to determine 
the method of calculating Net Sales for Combination Products.

If F. Roche or its Affiliates or sublicensees receive non-cash 
consideration for any Licensed Product sold or otherwise transferred to an 
independent third party not an Affiliate of the seller or transferor, the fair 
market value of such non-cash consideration on the date of the transfer as 
known to F. Roche, or as reasonably estimated by F. Roche if unknown, shall be 
included in the definition of Net Sales.

1.08    "PDL Know-How" means, except as otherwise set forth in this 
Section 1.08, all inventions, discoveries, trade secrets, information, 
experience, data, formulas, procedures and results in the Field, and 
improvements thereon, including any information regarding the structure, 
sequence and characterization of Antibodies in the Field, methods of making 
and the characterization of cell lines producing Antibodies in the Field, and 
methods of achieving high levels of expression of Antibodies in the Field, 
which are rightfully held by PDL as of the Effective Date, or which are 
developed or acquired by PDL during the period beginning on the Effective Date 
and ending one year after termination of the Research Program, and which Know-
How is needed for registration, manufacturing, using or selling products in 
the Field; provided, however, that PDL Know-How excludes any Know-How of any 
kind concerning generic methods of designing, developing or preparing 
antibodies including, but not limited to, methods of humanizing antibodies, 
methods of reducing the immunogenicity of antibodies, and methods of 
increasing the affinity of antibodies.

1.09    "PDL Patents" means all patent applications owned or controlled by 
PDL ("Sole PDL Patents") and all patent applications resulting from Joint 
Inventions ("Joint Roche-PDL Patents") containing claims in the Field, which 
are filed prior to or during the term of this Agreement in the United States 
or any foreign jurisdiction, including any addition, continuation, 
continuation-in-part or division thereof or any substitute application 
therefor; any patent issued with respect to such patent application, any 
reissue, extension or patent term extension of any such patent, and any 
confirmation patent or registration patent or patent of addition based on any 
such patent; and any other United States and foreign patent or inventor's 
certificate covering claims in the Field.

1.10    "Regulatory Approval" means the granting of all governmental 
regulatory approvals required, if any, for the sale of a Licensed Product in a 
given country or jurisdiction within the Territory.

1.11    "Research Program" means the collaborative scientific research 
program between PDL and Roche described more fully in Article VI of the 
PDL/Roche Agreement.

1.12    "F. Roche Inventions" means any inventions in the Field which are 
made during the term of this Agreement by employees of F. Roche or persons 
contractually required to assign or license patent rights covering such 
inventions to F. Roche.

1.13    "Roche Territory" means the United States of America and its 
territories and possessions where the patent laws of the United States are in 
force.  It is understood that the PDL/Roche Agreement comprises a separate but 
complementary license agreement covering activities in the Roche Territory.

1.14    "Territory" means all countries of the world excluding the Roche 
Territory.

1.15    "Valid Claim" means a claim in any issued patent within the PDL 
Patents which has not been disclaimed or held unenforceable or invalid by a 
decision of a court or governmental agency of competent jurisdiction by a 
decision beyond right of review.

II.  LICENSE GRANT

2.01    License Grant.  PDL grants to F. Roche and to F. Roche's 
Affiliates the sole and exclusive right to the PDL Know-How and the PDL 
Patents, but only to the extent necessary to make, have made, use and sell 
Licensed Products in the Field within the Territory.  For so long as F. Roche 
is in compliance with its obligations under Section 5.01 hereof, F. Roche may 
sublicense the right to make, have made, use and sell Licensed Products in the 
Field within the Territory, but no other rights may be sublicensed.  Any such 
sublicense shall be subject to Section 3.05 hereof, and shall terminate 
automatically if F. Roche or Roche shall not have remedied or initiated steps 
to remedy a breach of Section 5.01 hereof or Section 7.01 of the PDL/Roche 
Agreement, respectively, in a manner reasonably satisfactory to PDL within 
sixty (60) days after receipt by F. Roche of notice of such breach from PDL.

2.02    Identification of Patents.  Set forth on Appendix A is a list 
identifying patents or patent applications which comprise Sole PDL Patents.  
PDL shall update this list by delivering a supplement to F. Roche no less 
frequently than once per year during the term of this Agreement.
CONFIDENTIAL TREATMENT REQUESTED

III.  ROYALTIES

3.01    F. Roche agrees to pay PDL royalties for sales of Licensed 
Products and Combination Products according to the schedule and terms set 
forth below:

(a)     Years 1 through 3.  Prior to and for the first three (3) 
years following Initial Commercialization of a particular Licensed Product, 
F. Roche shall pay PDL royalties on sales of that product at a rate determined 
by the aggregate annual worldwide Net Sales of all Licensed Products as 
follows:

Net Sales ($ in millions)                               Royalty Rate

Up to and including [   ]                               [  ]
Amount in excess of [   ] but not exceeding [   ]       [  ]
Over [   ]                                              [  ]

For purposes of computing aggregate annual worldwide Net Sales, 
F. Roche's Net Sales in the Territory will be combined with the Net Sales of 
Roche within the Roche Territory.  This same understanding is being 
incorporated into the PDL/Roche Agreement.

(b)     Years 4 and Succeeding.  For the fourth and each succeeding 
year following Initial Commercialization, F. Roche shall pay PDL royalties in 
accordance with the provisions of Section 3.01(a) for Net Sales in a 
particular country, provided either (i) the Licensed Product or its method of 
manufacture (wherever actually manufactured) is covered by a Valid Claim in 
the country of sale, or (ii) the Licensed Product is manufactured in a country 
where the method of manufacture is covered by a Valid Claim (together, (i) and 
(ii) are referred to as the "Patentability Criteria").

Subject to Section 3.02 below, if neither of the Patentability Criteria 
have been satisfied, then Roche shall pay PDL a royalty rate of [               
        ] of the Net Sales in the country of sale for the duration of this 
Agreement or until such time as one of the Patentability Criteria is 
satisfied, at which time F. Roche shall resume paying PDL royalties at the 
rates specified in Section 3.01(a) above.

(c)     Expiration.  F. Roche's obligation to pay royalties to PDL 
hereunder shall expire with respect to sales in any particular country of any 
particular Licensed Product on the later of the expiration of all Valid
Claims covering such Licensed Product or the [           ] anniversary of 
Initial Commercialization of such Licensed Product in the Territory.

(d)     Antibodies in the Field Not Provided or Developed by PDL.  
In consideration of the disclosure to F. Roche of PDL Know-How and cell lines 
as provided for herein, F. Roche agrees that products incorporating or using 
antibodies in the Field which are not provided or developed by PDL shall 
nevertheless be presumed to utilize PDL Know-How, with such presumption being 
rebuttable by clear and convincing evidence with respect to sales of such 
products made in those countries listed on Appendix B, and such presumption 
being conclusive as between the parties hereto with respect to sales of such 
products made anywhere else within the Territory.  Accordingly, F. Roche shall 
pay PDL royalties on sales of each such product in the Territory (except for 
sales with respect to which the above rebuttable presumption has in fact been 
refuted by Roche) for a period of [             ] years from Initial 
Commercialization of such product in accordance with the terms of this 
Section 3.01, and such sales shall constitute "Net Sales" for purposes hereof.

3.02    De Facto Exclusivity.  For purposes of this Article III, the term 
"de facto exclusivity" means that F. Roche, together with its Affiliates and 
sublicensees, controls at least [             ] of the market for a particular
Licensed Product in a country as measured by unit sales.  If neither of the 
Patentability Criteria have been satisfied and F. Roche does not enjoy de 
facto exclusivity for a particular Licensed Product in a particular country at 
any time after [           ] years following Initial Commercialization of such 
Licensed Product, then F. Roche shall pay PDL a royalty rate of [        ] of 
the Net Sales of such Licensed Product in the country of sale until the [
        ] anniversary of Initial Commercialization, or until F. Roche shall 
acquire de facto exclusivity for that product or until such time as either of 
the Patentability Criteria is satisfied (at which time F. Roche shall resume 
paying PDL royalties at the rates specified in Sections 3.01(a) or (b) above, 
whichever is applicable).  Valid Claims and de facto exclusivity are to be 
determined on a country-by-country basis.

3.03    Foreign Filing Expenses Credited Against Royalties.  F. Roche 
shall have the right to credit [         ] of all Foreign Filing Expenses (as 
defined in Section 5.02 below) actually paid to PDL against future royalties 
due to PDL pursuant to this Article III provided that such credits, when added 
to the offset provided for in Section 3.04 below, may not reduce the royalties 
to be paid to PDL to less than [                ] of the amount which would 
otherwise be due pursuant to Section 3.01 hereof.

3.04    Offset for Third Party Licenses.

(a)     If PDL and F. Roche agree in writing that either party must 
obtain a license from an independent third party in order for F. Roche to 
manufacture, use or sell a Licensed Product in the Territory and if PDL and 
F. Roche agree upon the terms of such license ("Third Party License"), then 
the parties shall [     ] the cost of that license [            ].  
Such cost includes license fees and any other fixed costs associated with the 
Third Party License as well as any royalties.  The parties then shall, within 
thirty (30) days, reimburse each other in the manner necessary to effect a [   
        ] of such license fees and other fixed costs.

(b)     PDL's share of the royalties portion of the cost of any 
Third Party License, shall be (i) accrued against and deducted from any 
royalties due to PDL from F. Roche pursuant to Sections 3.01 and 3.02 if 
F. Roche pays the royalties due under the Third Party License to such third 
party, and (ii) accrued in favor of and added to any royalties due to PDL from 
F. Roche pursuant to Sections 3.01 and 3.02 if PDL pays the royalties due 
under the Third Party License to such third party; provided, however, that 
this addition or offset shall not cause PDL's royalties to be reduced under 
the schedule set forth in Section 3.01 to less than [                 ] of Net
Sales in any year, or under Sections 3.01(b) and 3.02 to less than [            
        ] if F. Roche has de facto exclusivity and [                    ] if 
F. Roche does not have de facto exclusivity, and provided further, that 
F. Roche's total royalty obligations to PDL under Sections 3.01 and 3.02 when 
added to those royalties payable to third parties pursuant to Third Party 
Licenses shall not exceed [             ] of Net Sales in any year.

3.05    Sublicenses.  Any Net Sales of an F. Roche sublicensee shall be 
treated as Net Sales of F. Roche for purposes of royalty payments hereunder.  
If F. Roche shall grant any sublicenses under this Agreement, then F. Roche 
shall obtain the written commitment of such sublicensees to abide by all 
applicable terms and conditions of this Agreement and F. Roche shall remain 
responsible to PDL for the performance of any and all terms by such 
sublicensee.  All such sublicenses shall terminate on termination of this 
Agreement.

3.06    Royalties upon Termination.  If this Agreement is terminated 
pursuant to Sections 7.02, 7.03 or 7.04 below, F. Roche shall continue to pay 
PDL any royalties earned pursuant to this Article III prior to the date of 
termination and any royalties earned thereafter as a result of sales under 
Section 7.05.

IV.  ACCOUNTING AND PAYMENTS

4.01    Semi-Annual Royalty Payments and Reports.  F. Roche agrees to make 
royalty payments and written reports to PDL following the end of every 
calendar half-year covering all sales of Licensed Products by F. Roche, its 
Affiliates or sublicensees for which invoices were sent during such half-year 
period.  F. Roche shall exercise its best efforts to render such reports 
within forty-five (45) days after the end of each calendar half-year period, 
but in no event shall such reports be rendered by F. Roche later than 
sixty (60) days after the end of each calendar half-year period.  Each report 
shall state:

(a)     for Licensed Products disposed of by sale, the quantity, 
description, country(ies) of manufacture and sale, Net Sales, GIP and the 
deductions pursuant to Section 1.07 by which such GIP is reduced to Net Sales,

(b)     for Licensed Products disposed of other than by sale, the 
quantity, description, country(ies) of manufacture and disposition, and nature 
of the disposition, and

(c)     the calculation of royalties due to PDL for such period 
pursuant to Section 1.07 and Article III hereof.  

The information contained in each such report shall be considered 
confidential and PDL agrees not to disclose such information to any third 
party except as may be required by law, or to PDL's shareholders during such 
time as PDL is a privately-held company pursuant to any contract among PDL and 
such shareholders.  Each report shall reconcile aggregate annual Net Sales 
attributable to F. Roche with aggregate annual worldwide Net Sales 
attributable to Roche.  Concurrent with the making of each report, F. Roche 
shall include payment due PDL of royalties for the period covered by such 
report.

It is understood that pursuant to this provision, only one royalty shall 
be payable on a given unit of Licensed Product disposed of under this 
Agreement.  In the case of transfers or sales of any Licensed Product between 
Roche, F. Roche or an Affiliate or sublicensee of Roche or F. Roche, only one 
royalty payment shall be due, and such royalty shall be payable with respect 
to the sale of such Licensed Product to an independent third party not an 
Affiliate of the seller.

4.02    Termination Report.  F. Roche also agrees to make a written report 
to PDL within ninety (90) days after the date on which F. Roche, Roche or 
their Affiliates or sublicensees last sell a Licensed Product, stating in such 
report the same information called for in each semi-annual report by 
Section 4.01 for all Licensed Products and Combination Products made, sold or 
otherwise disposed of and upon which were not previously reported to PDL.

4.03    Accounting.  F. Roche agrees to keep full, clear and accurate 
records for a period of at least three (3) years, or such longer period as may 
coincide with F. Roche's internal records retention policy, setting forth the 
manufacturing, sales and other disposition of Licensed Products and 
Combination Products sold or otherwise disposed of under the license herein 
granted in sufficient detail to enable royalties payable to PDL hereunder to 
be determined.  F. Roche further agrees to permit its books and records to be 
examined by an independent accounting firm selected by PDL from time to time 
to the extent necessary to verify reports provided for in Sections 4.01 and 
4.02 above.  Unless PDL obtains the prior written consent of F. Roche, such 
accounting firm must be a foreign representative of one of those firms 
commonly referred to in the United Sates as the "Big Eight" firms.  Such 
examination is to be made at the expense of PDL, except in the event that the 
results of the audit reveal a discrepancy in favor of F. Roche of 10% or more 
over the period being audited, in which case reasonable audit fees for such 
examination shall be paid by F. Roche.

4.04    Methods of Payment.  All payments due to PDL hereunder shall be 
paid in United States dollars by wire transfer to a bank in the United States 
designated in writing by PDL.  Conversion from Swiss Francs into the 
equivalent in United States dollars shall be made at the rate of exchange for 
buying funds as quoted and confirmed by the Swiss Bank Corporation in Basle, 
Switzerland for the last business day of each calendar half-year.

4.05    Withholding Taxes.  If law or regulation requires the withholding 
of any taxes due by F. Roche's Affiliates or sublicensees on Net Sales by such 
Affiliates or sublicensees in a given country in the Territory, the parties 
shall confer regarding possible alternative arrangements to lawfully avoid 
such withholding.  If, between a country in the Territory and any other place 
as designated, a treaty for the avoidance of double taxation is in force and 
such treaty reduces or eliminates the withholding of any taxes otherwise due 
on royalties payable from such country, PDL may (but shall not be obligated 
to) request a direct remittance of royalties to PDL at such place that PDL may 
designate hereunder.  If the parties are unable to formulate or agree upon 
action to lawfully avoid withholding, then the parties agree that fifty 
percent (50%) of such taxes shall be applied to reduce the Net Sales amount 
for sales of Licensed Products in such country.  Notwithstanding the 
foregoing, F. Roche shall be solely responsible for any withholding of taxes 
due on royalties payable from Japan and the countries listed on Appendix B.

4.06    Currency Transfer Restrictions.  If in any country in the 
Territory the payment or transfer of royalties on Net Sales in such country is 
prohibited by law or regulation, the parties hereto shall confer regarding the 
terms and conditions on which Licensed Products shall be sold in such 
countries, including the possibility of payment of royalties to PDL in local 
currency to a bank account in such country or the re-negotiation of royalty 
rates and terms for such sales.  However, PDL shall be under no obligation to 
accept terms and conditions other than those set forth herein, and if the 
parties do not reach an alternative agreement then F. Roche shall either 
(a) remain responsible for royalties payable to PDL with respect to Net Sales 
in such countries, or (b) cease sales in such countries, which shall not be 
deemed a breach by F. Roche of its due diligence obligations under 
Section 5.01 below.

V.  CERTAIN COVENANTS OF F. ROCHE

5.01    Diligence.  F. Roche shall use reasonable diligence in proceeding 
with registering, marketing and selling Licensed Products within the Territory 
in the event such products are developed as a result of the PDL/Roche 
Agreement.  Reasonable diligence as used in this Agreement shall mean the same 
standard of effort used by F. Roche in registering, marketing and selling its 
own protein-based products which must receive Regulatory Approval.  The 
parties acknowledge that F. Roche does not register, market and sell its own 
protein-based products in every country within the Territory, and it is 
understood that the exercise by F. Roche of reasonable diligence is to be 
determined by judging its efforts in the Territory taken as a whole.  If 
F. Roche fails to exercise such diligence, PDL may terminate this Agreement 
and F. Roche's rights hereunder pursuant to Section 7.04 below.

5.02    Reimbursement for Costs of Patent Applications.

(a)     F. Roche agrees to reimburse PDL for all ex parte out-of-
pocket expenses incurred by PDL after the Effective Date hereof in connection 
with the prosecution and maintenance in the Territory of patent applications 
and patents included within the Sole PDL Patents or Joint Roche-PDL Patents
for which PDL makes filings pursuant to Article IX of the PDL/Roche Agreement
("Foreign Filing Expenses").  F. Roche shall make such payments to PDL no
less frequently than semi-annually, within thirty (30) days after submission
by PDL of a reasonably itemized statement of such expenses incurred 
by PDL during the relevant six-month period.  Notwithstanding the 
foregoing, F. Roche shall not be obligated to reimburse PDL for such expenses
exceeding an aggregate of [              ] in any calendar year.

(b)     Prior to the filing of a patent application in the 
Territory, PDL shall inform F. Roche concerning such proposed filing and shall 
consult with F. Roche concerning the proposed filing procedures, including 
specifically the determination of the scope of any such patent and the 
countries in which such application is to be filed.  PDL shall regularly 
advise F. Roche of any substantial action or development in the prosecution of 
its patent applications and patents in the Territory, in particular of the 
question of scope of, the issuance of, the rejection of, or an opposition to 
any respective patent application or patent.

(c)     F. Roche shall be entitled to a credit against royalties 
payable hereunder as provided in Section 3.03 hereof.

VI.  OWNERSHIP OF TECHNOLOGY

6.01    PDL Technology.  Ownership of the PDL Know-How and Sole PDL 
Patents shall remain vested at all times in PDL.  Notwithstanding the 
provisions of Section 2.01, PDL expressly reserves under this Agreement 
(i) all rights to use the PDL Know-How and Sole PDL Patents to make, have 
made, use and sell anywhere in the world all products not within the Field and 
(ii) the right to use the PDL Know-How and Sole PDL Patents for PDL's internal 
research purposes in the Field.

6.02    Joint Inventions and Joint Roche-PDL Patents.  Ownership of Joint 
Inventions and Joint Roche-PDL Patents shall be vested jointly in PDL and 
Roche.  F. Roche shall have the exclusive right to make, have made, use or 
sell any Joint Invention or Joint Roche-PDL Patent in the Field within the 
Territory during the term of the Agreement.  Both parties shall have the non-
exclusive right to make, have made, use or sell any Joint Invention or Joint 
Roche-PDL Patent outside the Field during the term of the Agreement, and 
neither party shall be obligated to account to the other for such use.  Upon 
the expiration or termination of the Agreement, both parties shall have the 
non-exclusive right to make, have made, use or sell any Joint Invention or 
Joint Roche-PDL Patent without restriction and without any obligation to 
account to the other party for such use.  Notwithstanding the foregoing or the 
provisions of Section 2.01, PDL expressly reserves the right to use Joint 
Inventions and Joint Roche-PDL Patents for PDL's internal research purposes in 
the Field and to carry out its obligations under the PDL/Roche Agreement.

6.03    F. Roche Inventions.  PDL hereby acknowledges that this Agreement 
does not grant PDL any ownership rights in the F. Roche Inventions.

VII.  TERM AND TERMINATION

7.01    Term.  Unless earlier terminated pursuant to the terms of this 
Article VII, this Agreement shall remain in effect until the later of (a) the 
date of expiration of the last to expire of any Valid Claims in any country or 
(b) the date of the [           ] anniversary of Initial Commercialization of 
the last Licensed Product to be introduced by F. Roche hereunder, at which 
time this Agreement shall automatically expire.

7.02    Termination by Mutual Agreement.  This Agreement may be terminated 
by the written agreement of the parties.

7.03    Termination by F. Roche.  F. Roche may terminate this Agreement 
upon ninety (90) days written notice to PDL.

7.04    Termination by Default.  If either party defaults in the 
performance of, or fails to be in compliance with, any material agreement, 
condition or covenant of this Agreement, the party not in default may 
terminate this Agreement at its option; provided, however, that if such event 
of default or non-compliance is the first occurrence of an event giving rise 
to the right of termination pursuant to this Section 7.04, the non-defaulting 
party may terminate this Agreement only if such default or noncompliance shall 
not have been remedied, or steps initiated to remedy the same to the other 
party's reasonable satisfaction within sixty (60) days after receipt by the 
defaulting party of a written notice thereof from the other party.  If PDL 
terminates the PDL/Roche Agreement pursuant to Section 11.04 thereof, PDL may 
elect to simultaneously terminate this Agreement upon written notice to 
F. Roche.  If Roche terminates the PDL/Roche Agreement pursuant to 
Section 11.04 thereof, F. Roche may elect to simultaneously terminate this 
Agreement upon written notice to PDL.

7.05    Inventory.  Upon termination of this Agreement, PDL hereby grants 
F. Roche a license to sell within one (1) year of such termination any 
Licensed Products in F. Roche's or its Affiliates or sublicensee's inventory 
on the date of such termination, which have not previously been sold 
("Inventory"); provided, however that F. Roche shall pay the royalties due on 
such Inventory in the amounts and manner provided for in Articles III and IV.

7.06    Return of Materials.  Subject to Section 7.08 hereof concerning 
archival copies, upon termination of this Agreement by F. Roche pursuant to 
Section 7.03 or by either or both parties pursuant to Sections 7.02 or 7.04, 
F. Roche forthwith shall return to PDL all cell lines and their progeny, 
antibodies and other biological materials provided by PDL under the PDL/Roche 
Agreement.

7.07    Rights and Obligations on Termination or Expiration.  Unless 
expressly provided to the contrary, the provisions of Sections 3.06 and 5.03 
and Articles IV, VIII, IX and XI shall survive the termination of this 
Agreement.  Upon the expiration of this Agreement pursuant to 
Section 7.01 above, if it is not otherwise terminated pursuant to this Article 
VII, PDL shall grant to F. Roche a [                    ] license to use 
the PDL Know-How and Sole PDL Patents and cell lines delivered by
PDL pursuant to the PDL/Roche Agreement, but only to the extent necessary
to make, have made, use and sell Licensed Products in the Field within
the Territory.

7.08    Archival Copies.  Section 7.06 notwithstanding, each party shall 
be entitled to keep for archival purposes one copy of all written materials 
returned to the other party pursuant to Section 7.06.

VIII.  CONFIDENTIALITY, DISCLOSURE AND PUBLICATIONS

8.01    Confidentiality.  During the term of this Agreement and for a 
period of five (5) years following expiration or termination of this 
Agreement, each party shall maintain in confidence all information and 
materials including, but not limited to, cell lines, their progeny, and 
antibodies, disclosed by the other party hereto which such party knows or has 
reason to know are or contain trade secrets or other proprietary information 
of the other, including, without limitation, information relating to the PDL 
Know-How, PDL Patents, Joint Inventions and inventions of the other party, and 
the business plans of the other party, including, without limitation, 
information provided by either party to the other party hereto prior to the 
Effective Date, and shall not use such trade secrets or proprietary 
information for any purpose, including, without limitation, for the purpose of 
developing products in the Field except as permitted by this Agreement or 
disclose the same to anyone other than those of its Affiliates, sublicensees, 
employees, consultants, agents or subcontractors as are necessary in 
connection with such party's activities as contemplated in this Agreement.  
Each party shall be responsible for ensuring compliance with these obligations 
by such party's Affiliates, sublicensees, employees, consultants, agents and 
subcontractors.  Each party shall use a similar effort to that which it uses 
to protect its own most valuable trade secrets or proprietary information to 
ensure that its Affiliates, sublicensees, employees, consultants, agents and 
subcontractors do not disclose or make any unauthorized use of trade secrets 
or proprietary information of the other party hereto.  Each party shall notify 
the other promptly upon discovery of any unauthorized use or disclosure of the 
other's trade secrets or proprietary information.

8.02    Exceptions.  The obligation of confidentiality contained in this 
Agreement shall not apply to the extent that (a) either party (the 
"Recipient") is required to disclose information by order or regulation of a 
governmental agency or a court of competent jurisdiction or (b) the Recipient 
can demonstrate that (i) the disclosed information was at the time of such 
disclosure by the Recipient already in the public domain other than as a 
result of actions of the Recipient, its Affiliates, employees, licensees, 
agents or subcontractors, in violation hereof; (ii) the disclosed information 
was rightfully known by the Recipient or its Affiliates (as shown by its 
written records) prior to the date of disclosure to the Recipient in 
connection with the negotiation, execution or performance of this Agreement; 
or (iii) the disclosed information was received by the Recipient or its 
Affiliates on an unrestricted basis from a source unrelated to any party to 
this Agreement and not under a duty of confidentiality to the other party, or 
(c) the Recipient can demonstrate that disclosure to a regulatory authority is 
required by its product license approval process.

IX.  DISPUTE RESOLUTION

9.01    Arbitration.  Any claim, dispute or controversy arising out of or 
in connection with or relating to this agreement or the breach or alleged 
breach thereof shall be submitted by the parties to arbitration by the 
American Arbitration Association in Santa Clara County, California under the 
commercial rules then in effect for that Association except as provided 
herein.  All proceedings shall be held in English and a transcribed record 
prepared in English.  The parties shall choose, by mutual agreement, one 
arbitrator within thirty (30) days of receipt of notice of the intent to 
arbitrate.  If no arbitrator is appointed within the times herein provided or 
any extension of time which is mutually agreed upon, the Association shall 
make such appointment within thirty (30) days of such failure.  The award 
rendered by the arbitrator shall include costs of arbitration, reasonable 
attorneys' fees and reasonable costs for expert and other witnesses, and 
judgment on such award may be entered in any court having jurisdiction 
thereof.  The parties shall be entitled to discovery as provided in 
Sections 1283.05 and 1283.1 of the Code of Civil Procedure of the State of 
California, whether or not the California Arbitration Act is deemed to apply 
to said arbitration.  Nothing in this Agreement shall be deemed as preventing 
either party from seeking injunctive relief (or any other provisional remedy) 
from any court having jurisdiction over the parties and the subject matter of 
the dispute as necessary to protect either party's name, proprietary 
information, trade secrets, know-how or any other proprietary right.  If the 
issues in dispute involve scientific or technical matters, any arbitrator 
chosen hereunder shall have educational training and/or experience sufficient 
to demonstrate a reasonable level of knowledge in the field of biotechnology.  
Judgment upon the award rendered by the arbitrator may be entered in any court 
having jurisdiction thereof.

X.  FORCE MAJEURE

10.01   If either party shall be delayed, interrupted in or prevented from 
the performance of any obligation hereunder by reason of force majeure 
including an act of God, fire, flood, earthquake, war (declared or 
undeclared), public disaster, strike or labor differences, governmental 
enactment, rule or regulation, or any other cause beyond such party's control, 
such party shall not be liable to the other therefor; and the time for 
performance of such obligation shall be extended for a period equal to the 
duration of the contingency which occasioned the delay, interruption or 
prevention.  The party invoking such force majeure rights of this subparagraph 
must notify the other party by registered letter within a period of 
fifteen (15) days, from the first and last day of the force majeure unless the 
force majeure renders such notification impossible in which case notification 
will be made as soon as possible.  If the delay resulting from the force 
majeure exceeds six (6) months, both parties shall consult together to find an 
appropriate solution.

XI.  MISCELLANEOUS

11.01   Representations of PDL.  PDL represents and warrants to F. Roche 
that, except as may otherwise be disclosed in writing to F. Roche:
(a)     PDL has the full right and authority to enter into this 
Agreement;

(b)     to the best knowledge of PDL after reasonable investigation, 
no third party has any right, title or interest in the Sole PDL Patents or PDL 
Know-How as the result of such third party's former employment of any PDL 
employee;

(c)     PDL is not aware of any patent or other proprietary rights 
of third parties which might be infringed by the Sole PDL Patents or the PDL 
Know-How.

11.02   Assignment.  This agreement and the licenses herein granted other 
than the PDL/Roche Agreement relating to the same Field but for the Roche 
Territory shall be binding upon and shall inure to the benefit of, successors 
of the parties hereto, or to an assignee of all of the good will and entire 
business and assets of a party hereto relating to pharmaceutical and 
veterinary products but shall not otherwise be assignable without the prior 
written consent of the other party, which consent will not be unreasonably 
withheld.

11.03   Entire Agreement.  This Agreement and the PDL/Roche Agreement 
constitute the entire Agreement between the parties hereto with respect to the 
within subject matter and supersede all previous Agreements, whether written 
or oral.  This Agreement shall not be changed or modified orally, but only by 
an instrument in writing signed by both parties.

11.04   Severability.  If any provision of this Agreement is declared 
invalid by an arbitrator pursuant to Section 9.01 or by a court of last resort 
or by any court or other governmental body from the decision of which an 
appeal is not taken within the time provided by law, then and in such event, 
this Agreement will be deemed to have been terminated only as to the portion 
thereof which relates to the provision invalidated by that decision and only 
in the relevant jurisdiction, but this Agreement, in all other respects and 
all other jurisdictions, will remain in force; provided, however, that if the 
provision so invalidated is essential to the Agreement as a whole, then the 
parties shall negotiate in good faith to amend the terms hereof as nearly as 
practical to carry out the original intent of the parties, and, failing such 
amendment, either party may submit the matter to arbitration for resolution 
pursuant to Section 9.01.

11.05   Indemnification.  F. Roche shall defend, indemnify and hold 
harmless PDL, its trustees, officers, agents and employees harmless from any 
and all liability, demands, damages, expenses, and losses of any kind, 
including those resulting from death, personal injury, illness or property 
damage arising (i) out of the manufacture, distribution, use, testing, sale or 
other disposition, by F. Roche, an Affiliate of F. Roche, or any distributor, 
customer, sublicensee or representative of F. Roche or anyone in privity 
therewith, of any Licensed Product, or any cell lines, their progeny, or other 
biological materials provided by PDL pursuant to the PDL/Roche Agreement, 
method, process, device or apparatus licensed or provided by PDL to F. Roche 
hereunder, or (ii) as a result of practicing a Joint Invention, or using PDL 
Know-How or PDL Patents licensed to F. Roche under this Agreement, except 
where such claim is based on the negligent acts of commission or omission of 
PDL.

11.06   Notices.  Any notice or report required or permitted to be given 
under this Agreement shall be in writing and shall be mailed by certified or 
registered mail, or telexed or telecopied and confirmed by mailing, as follows 
and shall be effective five (5) days after such mailing:

If to PDL:
Protein Design Labs, Inc.
3181 Porter Drive
Palo Alto, California  94304
Attention:  President

Copy to:        
Gray Cary Ware & Freidenrich
400 Hamilton Avenue
Palo Alto, California  94301-1809
Attn:  Marta L. Morando, Esq.

If to F. Roche:
F. Hoffman - La Roche & Co.
Limited Company
Grenzacherstrasse 124
CH-4002 Basle, Switzerland
Attention:  Law Department

11.07   Choice of Law.  The validity, performance, construction, and 
effect of this Agreement shall be governed by the laws of the State of 
California, United States of America.

11.08   Publicity.  Both parties agree to issue mutual press releases 
concerning their entry into this Agreement, with the content of such releases 
to be approved in advance by both parties.  In all other respects, neither 
party shall use the name of the other party in any publicity release without 
the prior written permission of such other party, which shall not be 
unreasonably withheld.  The other party shall have a reasonable opportunity to 
review and comment on any such proposed publicity release.  Except as required 
by law, neither party shall publicly disclose the terms of this agreement or 
its terms and conditions unless expressly authorized to do so by the other 
party which authorization shall not be unreasonably withheld.  In the event 
that disclosure shall be agreed upon then the parties will work together to 
develop a mutually acceptable disclosure.

11.09   Headings.  The captions used herein are inserted for convenience 
of reference only and shall not be construed to create obligations, benefits, 
or limitations.

11.10   Counterparts.  This Agreement may be executed in counterparts, all 
of which taken together shall be regarded as one and the same instrument.

IN WITNESS WHEREOF, the parties have executed this Agreement to be 
effective as of the Effective Date.

PROTEIN DESIGN LABS, INC.
By  /s/ Laurence Jay Korn
Title:  President
Date:   16 March 1989

F. HOFFMANN-LA ROCHE & CO.
LIMITED COMPANY

By  /s/ W. Herr. /s/ Pp Lunti
Title:  Corporate Licensing     Law Department
Date:   March 16, 1989

Solely with respect to the granting of rights in Joint Roche-PDL Patents to F. 
Roche, Roche hereby joins in this Agreement.

HOFFMANN-LA ROCHE INC.


By  /s/ Irwin Lerner
Title:  President and CEO
Date:   March 16, 1989


                                    APPENDIX A
                                 Sole PDL Patents
T&T
DOCKET
NO.         TITLE                INVENTORS      FILING DATE    SERIAL NO. STATUS

11823-1     Closing and          Tso and Queen  Dec. 15, 1987  132,387   Pending
            Expressions of 
            Phospholipase C 
            Genes

11823-4     IL-2 Receptor-       Queen          Apr. 15, 1988  182,682   Pending
            Specific
            Chimeric Antibodies

11823-5     Chimeric Antibody    Queen          Sep. 28, 1988  233,037   Pending
            Production

11823-7     Cellular Toxic       Queen          Nov. 23, 1988  275,462   Pending
            Conjugates

11823-7-1   Cellular Toxic       Queen,         Dec. 15, 1988  PCT/US88/ Pending
(Comb. of   Conjugates           Chovnick,      (Canada & PCT  04493
`387 and                         Schneider and  for Japan &  
`462)                            Tso            EPO)

11823-7-2   Cellular Toxic       Queen,         Dec. 28, 1988  290,968   Pending
(Comb. of   Conjugates           Chovnick,
`387 and                         Schneider and
`462)                            Tso 

11823-8     Novel IL-2           Queen and      Dec. 28, 1988  290,975   Pending
            Receptor Specific    Selleck
            Human 
            Immunoglobulins

11823-9     Humanized            Queen          Feb. 13, 1989  310,252   Pending
            Antibody 
            Production


                             APPENDIX B

EC Countries
Belgium
Denmark (including Iceland)
France
Germany
Greece
Ireland
Italy
Luxembourg
Netherlands
Portugal
Spain
United Kingdom (Scotland, England, Wales, Northern Ireland, Channel Islands, 
Isle of Man)

As soon as it is perceivable that one country of the Territory may join
the EC or withdraw or become excluded from the EC, this APPENDIX B shall be 
adapted accordingly.

 

EXHIBIT 10.11

CONFIDENTIAL TREATMENT REQUESTED

                                AGREEMENT

This Agreement is made as of the 30th day of November, 1989 by and 
between PROTEIN DESIGN LABS, INC. a corporation organized and existing under 
the laws of the State of Delaware and having its principal office at 3181 
Porter Drive, Palo Alto, California 94304 (hereinafter referred to as "PDL"), 
and SLOAN-KETTERING INSTITUTE FOR CANCER RESEARCH, a not-for-profit 
corporation organized and existing under the laws of the State of New York and 
having its principal office at 1275 York Street, New York, New York 10021 
(hereinafter referred to as "SKI").
                              WITNESSETH

WHEREAS, SKI has certain clinical and preclinical data, information and 
patent rights relating to the production and use of M195 monoclonal antibody 
("M195");

WHEREAS, SKI desired to have M195 monoclonal antibody developed and made 
available on reasonable terms for general use in the treatment of human 
diseases and for those purposes is willing to grant a license;

WHEREAS, PDL has or has access to the research and development 
capability, the manufacturing capacity and the marketing ability needed to 
manufacture and sell M195 monoclonal antibody products in the United States 
and abroad;

WHEREAS, PDL desires to obtain, and SKI is willing to grant, a license 
under the Licensed Patents and Technical Information and Know-How upon the 
terms and conditions set forth below.

NOW, THEREFORE, in consideration of the premises and the mutual 
covenants contained herein, the parties hereto agree as follows:

ARTICLE I - DEFINITIONS

For the purposes of this Agreement, the following words and phrases 
shall have the following meanings:

1.1     "Affiliate" shall mean
(a)     with respect to PDL, any corporation which directly or 
indirectly controls, is controlled by or is under common control with 
the party in question, control being the ownership of at least 50% of 
the outstanding voting stock of such corporation, including directors' 
qualifying shares owned beneficially, and having the power to vote for 
directors, and
(b)     with respect to SKI, Memorial Sloan-Kettering Cancer Center 
or Memorial Hospital for Cancer and Allied Diseases (collectively 
referred to as "Memorial"), and any present or future corporation or 
other entity effectively, at the time in question, under the control of 
or under common control with, SKI or Memorial.

1.2     "Combination Product(s)" means any End Product containing both an 
agent or ingredient which constitutes a Licensed Product and one or more other 
active agents which do not constitute Licensed Products.

1.3     "End Product(s)" means commercially marketable goods incorporating 
a Licensed Product which goods are sold in a form for therapeutic use and are 
not intended or marketed for further formulation, processing, repackaging or 
relabelling prior to such use.  End Products shall include any Combination 
Product.

1.4     "Field" shall mean the therapeutic treatment of hematologic 
malignancies, including but not limited to leukemia and lymphoma; the Field 
shall not include diagnostics.

1.5     "Licensed Patents" shall mean United States and foreign patents 
and patent applications owned or controlled by SKI or its Affiliates relating 
to M195 Antibodies at any time during the term of this Agreement, and the 
United States patents and foreign patents issuing from said United States and 
foreign patent applications or later-filed foreign application based upon any 
of said United States patents and application and any divisions, 
continuations, continuations-in-part, reissues or extensions of any of the 
foregoing.

1.6     "Licensed Product(s)" shall mean materials (a) that contain DNA or 
protein sequences which encode for all or a portion of any M195 Antibody, 
provided that any portion must include at a minimum the entire binding domain 
(complementarity determining regions) of such M95 Antibody, and (b) which were 
derived from hybridoma cell lines provided to PDL by SKI pursuant to this 
Agreement; however, Licensed Products shall exclude any murine M195 Antibody 
which is radiolabelled.  All Licensed Products shall fall into one of two 
classes:

Class 1 Products shall consist of one or more of the hybridoma 
cell lines provided by SKI hereunder or the monoclonal antibodies 
secreted by any such cell line when sold as End Products without any 
substantial modification, or if modified by means other than genetic 
engineering.

Class 2 Products shall consist of all other Licensed Products 
produced by genetic engineering, including, but not limited to, the 
following:  less than full-length antibody forms such as Fv, Fab, and 
F(ab')2; single-chain antibodies; hybrid antibodies; chimeric 
immunoglobulins (i.e., proteins constructed with immunoglobulin variable 
and constant regions from different antibodies); humanized 
immunoglobulins (i.e., an immunoglobulin comprising a substantially 
human framework region and one or more CDR's from a nonhuman 
immunoglobulin); and immunoglobulin conjugates composed of an 
immunoglobulin polypeptide bound to a toxin, label or other compound.

1.7     "M195 Antibody(ies)" shall mean (a) the M195 monoclonal antibody 
as described in Tanimoto, M. et al., Leukemia, Vol. 3, No. 5, May 1989, pages 
339-348 and (b) any other antibody binding to the CD33 antigen which is 
developed, discovered or acquired by Dr. David Scheinberg or personnel under 
his supervision while associated with SKI or its Affiliates prior to June 30, 
1993 and which PDL elects to have covered by this Agreement pursuant to 
Section 3.3 below.

1.8     "Net Sales" shall mean (a) with respect to sales of End Products 
by PDL, the gross sales price received for such End Products by PDL, the gross 
sales price received for such End Products less the following items to the 
extent they are paid or allowed and included in the invoice price:
(i)     Usual trade discounts actually allowed:
(ii)    Packing costs;
(iii)   Import, export, excise, sales taxes, and customs 
duties;
(iv)    Costs of insurance and transportation from the place 
of       manufacture to the customer's premises; and
(v)     Credit for returns, allowances, or trades;
and, (b) with respect to sales of End Products by a Sublicensee, the gross 
sales price received by the Sublicensee in respect of the sales of End 
Products, less such amounts for discounts, credits, transportation costs, 
taxes and other expenses as may be deductible by the Sublicensee for purposes 
of the payments Sublicensee is obligated to make to PDL pursuant to the 
written agreement between PDL and the Sublicensee.
In the case of Combination Products for which the agent or ingredient 
constituting a Licensed Product and each of the other active agents or 
ingredients not constituting Licensed Products have established market prices 
when sold separately, Net Sales shall be determined by multiplying the Net 
Sales for each such Combination Product by a fraction, the numerator of which 
shall be the established market price for the Licensed Product(s) contained in 
the Combination Product and the denominator of which shall be the sum of the 
established market prices for the Licensed Product(s) plus the other active 
agents or ingredients contained in the Combination Product.  When such 
separate market prices are not established, then the parties shall negotiate 
in good faith to determine a fair and equitable method of calculating Net 
Sales for the Combinational Product in question.

1.9     "Program" shall mean the collaborative research program generally 
described in Articles IV and V hereof and conducted at SKI under the direction 
of Dr. David A. Scheinberg (or his successor appointed by SKI with the consent 
of PDL which shall not be unreasonably withheld), and at PDL under the 
direction of Dr. Laurence J. Korn (or under the direction of such other person 
at PDL or a Sublicensee of PDL as Dr. Korn may designate).

1.10    "Sublicensee" shall mean any person who receives a sublicense from 
PDL pursuant to Article II hereof.

1.11    "Technical Information and Know-How" shall mean any and all 
technical data, information, material (including the cell lines 
delivered to PDL hereunder, antibodies, fragments thereof and gene 
sequences therefrom, and all other biological materials and samples) and 
other know-how which:
(a)     relates to M195 Antibodies, including, without limitation, 
physical and chemical and biological data and materials (including 
antibodies and fragments thereof and gene sequences therefrom), 
toxicological and pharmacological data, clinical data, veterinary data, 
medical uses, product forms and product formulations, specifications and 
techniques;
(b)     relates to methods, processes and techniques for the 
manufacture or use of Licensed Products including, without limitation, 
preparation, recovery and packaging, and sterilization processes and 
techniques, dosage regimens, control assays and specifications.

1.12    "Valid Claim" shall mean an unexpired claim in any issued Licensed 
Patent which has not been disclaimed or held unenforceable or invalid by a 
governmental agency or court by a decision or decree beyond right of review.

ARTICLE II - GRANT

2.1     SKI hereby grants to PDL and its Affiliates an exclusive, 
worldwide right and license, with the right to sublicense, (a) to make, use, 
and sell Licensed Products for use in the Field under the Licensed Patents, 
and (b) to use in the Field the Technical Information and Know-How provided by 
SKI or its Affiliates.

2.2     Set forth in Schedule A attached hereto is a list of patents or 
patent applications owned or controlled by SKI or its Affiliates comprising 
the Licensed Patents.  SKI shall update this list annually by delivering to 
PDL an amended Schedule A.

ARTICLE III - CERTAIN OBLIGATIONS AND REPRESENTATIONS OF SKI

3.1     Promptly following the execution of this Agreement, if not 
previously delivered, SKI shall deliver to PDL a viable hybridoma cell line 
producing the M195 monoclonal antibody.  SKI shall deliver to PDL such 
additional samples of this cell line from time-to-time as may be reasonably 
required by PDL to carry out its activities under this Agreement.

3.2     SKI and its Affiliates shall, promptly following the discovery, 
development or acquisition of any antibody which would, subject to PDL's 
election pursuant to Section 3.3, constitute an M195 Antibody, (a) advise PDL 
thereof, (b) disclose to PDL all Technical Information and Know-How relating 
thereto, and (c) deliver to PDL a viable hybridoma cell line producing such 
M195 Antibody and such additional samples of such cell line from time-to-time 
as may be reasonably required by PDL to carry out its activities under this 
Agreement.

3.3     At PDL's election made by written notice to SKI, any antibody 
which is required to be disclosed to PDL under Section 3.2 shall be deemed to 
be an M195 Antibody for all purposes of this Agreement.

3.4     SKI represents and warrants to PDL that SKI is the sole owner of 
the Licensed Patents, the Technical Information and Know-How provided to PDL 
hereunder, and the cell lines delivered to PDL hereunder; and that SKI has the 
full unrestricted legal right to grant the license granted to PDL hereunder 
and to disclose to PDL the Technical Information and Know-How required to be 
disclosed to PDL hereunder.

3.5     All employees and agents of SKI and its Affiliates who are engaged 
in the development of M195 Antibodies or Technical Information and Know-How 
are, in accordance with SKI's written policy attached as Schedule B hereto, 
under obligation, and shall continue to be under obligation, to assign to SKI 
all rights relating to M195 Antibodies or Technical Information and Know-How.

3.6     In the event that SKI or its Affiliates develop or acquire an M195 
Antibody which is radiolabelled, SKI shall notify PDL of such fact in writing.  
SKI hereby grants to PDL a right of first refusal to obtain rights in the 
Field to make, use and sell such radiolabelled M195 Antibody.  If at any time 
SKI or its Affiliates shall desire to grant rights (by way of license, sale or 
otherwise) to any party to make, use or sell such radiolabelled M195 Antibody 
(other than rights to use such radiolabelled M195 Antibody solely for research 
purposes with no rights to sell or otherwise commercialize a product, or 
rights to use such radiolabelled M195 Antibody for diagnostic purposes), SKI 
shall give PDL written notice identifying the subject radiolabelled M195 
Antibody and specifying all the principal terms and conditions on which SKI or 
its Affiliates proposes to grant such rights.  PDL may exercise its rights of 
first refusal by written notice to SKI within ninety (90) days of receipt of 
SKI's notice, in which case the parties shall promptly enter into a written 
agreement on such terms and conditions as were specified in SKI's notice and 
such corollary terms as may be usual for agreements of that type.  In the 
event that PDL fails to exercise its right of first refusal, SKI shall be 
entitled, for a period of one hundred twenty (120) days after the expiration 
of PDL's ninety (90) day period, to grant rights to the radiolabelled M195 
Antibody identified in SKI's notice to a third party on the same terms and 
conditions as were specified in SKI's notice.  Should SKI not consummate a 
grant of rights within such 120-day period, no subsequent grant may be made 
without first offering the rights to PDL in accordance with the right of first 
refusal granted in this Section 3.6

3.7     SKI represents and warrants to PDL that, to its best knowledge and 
belief after reasonable investigation, no employee of SKI or its Affiliates 
has developed at SKI or its Affiliates or is working at SKI or its Affiliates 
on the development of an antibody binding to the CD33 antigen other than Dr. 
David Scheinberg or personnel under his supervision.

ARTICLE IV - DEVELOPMENT EFFORTS

4.1     To induce SKI to enter into this Agreement, PDL represents that 
during the term of this Agreement it will exercise commercially reasonable 
efforts to proceed with the development, manufacture, and sale of End 
Products.

4.2     PDL shall exercise commercially reasonable efforts to complete the 
following actions ("Milestones") by the following dates:
(a)     on or prior to May 31, 1990, clone and sequence the genes 
for both the light and heavy chain of M195;
(b)     on or prior to November 30, 1990:
        (i)     construct IgGl and IgG3 chimeric antibodies and do 
        preliminary tests for binding affinity, complement fixation 
        ("CDC") and antibody-dependent cellular cytotoxicity 
        ("ADCC"),
        (ii)    complete the computer-aided design of humanized 
        antibody sequence;
(c)     on or prior to May 31, 1990:
        (i)     construct a humanized antibody and do preliminary 
        tests for its binding affinity, CDC and ADCC, and
        (ii)    genetically link the M195 and genes encoding one or 
        more toxins and perform cytotoxicity testing of the 
        resulting immunotoxin.

4.3     (a)     If PDL fails to achieve any Milestone by the date set forth 
above for such Milestone, the period for achieving such Milestone shall 
automatically be extended by up to three (3) months (the "First Extension") 
upon PDL's providing SKI with written notice of such failure with a reasonably 
detailed summary of actions taken by PDL to date and a plan for achieving the 
Milestone.  If PDL fails to achieve any Milestone by the end of the First 
Extension for such Milestone, then, for up to an additional six (6) months or 
such lesser period until the Milestone is achieved (the "Second Extension"), 
PDL shall provide the services of at least an average of [  ] full-time 
scientific personnel (scientists and/or technicians) to work on achieving such 
Milestone.  Notwithstanding the foregoing, in no event shall the aggregate of 
First Extensions and Second Extensions for all Milestones exceed an aggregate 
of nine (9) months.  With respect to Milestone (c), PDL shall be deemed to 
have achieved such Milestone if it achieves either the goal described in 
clause (i) or the goal described in clause (ii) of Subsection 2.4(c) above.
(b)     If PDL fails to achieve any Milestone by the end of the 
Second Extension for such Milestone, then SKI shall have the option to 
terminate PDL's rights to proceed to the next Milestone (the "Option") upon 
written notice to PDL within thirty (30) days after the expiration of the 
Second Extension.  If SKI exercises the Option, PDL shall retain only the 
rights to commercialize the results of those Milestones which it has achieved, 
and all rights to commercialize the results of Milestones not achieved by PDL 
shall revert to SKI.  Also, if (i) PDL has failed to achieve Milestone (c), 
(ii) SKI has exercised its Option, and (iii) PDL decides not to commercialize 
the results of Milestone (b), then SKI shall have a further option to 
commercialize the chimeric M195 Antibody developed by PDL pursuant to 
Milestone (b) by giving written notice to PDL and entering into a royalty 
agreement with PDL on terms to be negotiated by the parties in good faith.

4.4     SKI acknowledges that PDL may sublicense or subcontract portions 
of the development, testing, manufacture and/or sale of Licensed Products to a 
third party which may be a major pharmaceutical company ("Corporate Partner") 
and that, as part of such arrangement, the Corporate Partner may require the 
right to determine whether or not SKI shall conduct the activities described 
in this Section 4.4 and in Article V.  PDL agrees, however, to require in its 
written agreement with the Corporate Partner that the Corporate Partner must 
consent to such activities being conducted by Partner must consent to such 
activities being conducted by SKI provided that all of the following 
conditions are met:  (x) the technical, medical and scientific skills of SKI's 
principal investigator conducting such activities shall be acceptable in the 
reasonable judgment of the Corporate Partner; (y) SKI shall be able to supply 
an adequate number of patients for clinical trials in the reasonable judgment 
of the Corporate Partner; and (z) the protocols and procedures to be used or 
followed by SKI shall be mutually acceptable to SKI and the Corporate Partner.  
If there is no Corporate Partner, the foregoing three conditions must be met 
by SKI in PDL's reasonable judgment or, with respect to clause (z), to PDL's 
satisfaction.  Subject to such conditions being met and the consent of the 
Corporate Partner being obtained (if required), PDL shall request that SKI 
undertake, and SKI shall undertake, the following action:
(a)     promptly after receipt of a chimeric antibody by SKI:
        (i)     complete the biochemical/immunological testing       
        thereof:
        (ii)    upon the mutual agreement of PDL and SKI, and at PDL's 
        cost, scale up production of such chimeric antibody to 
        produce such materials for a Phase I trial at Memorial 
        Hospital for Cancer and Allied Diseases;
        (iii)   conduct a Phase I trial of such chimeric antibody;
(b)     promptly after receipt of the humanized antibody:
        (i)     complete the biochemical/immunological testing of such 
        humanized antibody;
        (ii)    upon the mutual agreement of PDL and SKI, and at PDL's 
        cost, scale up production of such humanized antibody to 
        produce such materials for a Phase I trial at Memorial 
        Hospital for Cancer and Allied Diseases; and
        (iii)   conduct a Phase I trial of such humanized antibody;
(c)     promptly after receipt of the M195 immunotoxin;
        (i)     complete the biochemical/immunological testing of such 
        immunotoxin; and
        (ii)    conduct a Phase I trial of such immunotoxin.

4.5     Notwithstanding the provisions of Section 4.4 above, PDL shall be 
obligated to fund, and SKI shall be obligated to perform, only one of the 
following three activities described in Section 4.4:  Section 4.4(a)(iii); 
Section 4.4(b)(iii), and Section 4.4(c)(ii).  However, if PDL elects to fund 
more than one of such activities, PDL shall request that SKI undertake, and 
SKI shall undertake, those additional activities, subject to the conditions of 
Section 4.4 above.

ARTICLE V - DIRECT PROGRAM SUPPORT BY PDL

5.1     Subject to the consent of the Corporate Partner in accordance with 
Section 4.4, in the event that further clinical tests or trials are required 
in the United States in the course of obtaining market approvals for Licensed 
Products, and providing that SKI and its Affiliates have the capability of 
doing so, then SKI and its Affiliates shall have the right of first refusal to 
be the site at which such further tests or trials are performed.  SKI agrees 
that such tests and trials shall be done at compensation equal to the median 
price paid to SKI and its Affiliates for similar tests and trials.  In all 
cases and regardless of this right of first refusal, PDL and its Corporate 
Partner shall have the right to conduct such trials at additional sites.

ARTICLE VI - CONSIDERATION

6.1     For the rights, privileges and license granted hereunder, PDL 
shall pay or cause to be paid to SKI:
(a)     a non-creditable license fee of [   ] payable in three 
installments of [   ], the first installment being due promptly 
after the execution of this Agreement, and the second and third 
installments being due on the first and second anniversaries, 
respectively, of the execution of this Agreement;
(b)     payments in the amounts set forth below promptly after 
receipt of governmental approval of the marketing of Licensed 
Products in the United States, with such amounts being creditable 
against royalties due to SKI pursuant to Section 6.1(c) below at 
any time hereunder, provided that no individual royalty payment 
shall be reduced by more than fifty percent (50%) of the amount 
that would otherwise have been due for that quarter:
       (i)     for the treatment of acute nonlymphocytic leukemia 
       (ANLL), [   ];
       (ii)    for the treatment of myelodysplastic syndrome (MDS), [   
       ];
       (iii)   for the treatment of chronic myelogenous leukemia 
       (CML), [   ];
       (iv)    for the treatment prior to bone marrow transplant, [         ];
(c)     a royalty of [   ] of the Net Sales of Class 1 End Products 
and [   ] of the Net Sales of Class 2 End Products sold by or for 
PDL, its Affiliates and Sublicensees where either (i) the End 
Product is covered by a Valid Claim in the country of sale, or 
(ii) the End Product is manufactured in a country where the method 
of manufacture is covered by a Valid Claim; and a royalty of [   ] 
of the Net Sales of Class 1 End Products and [   ] of the Net 
Sales of Class 2 End Products if the manufacture or sale of End 
Products is not covered by a Valid Claim in the country of 
manufacture or sale.

Such royalties shall be payable in each country until the expiration in such 
country of all Licensed Patents which, except for this Agreement, would be 
infringed by the manufacture, use or sale of End Products in such country or, 
if there is no such Licensed Patent in such country, for a period of [   ] 
years after the first marketing of End Products in such country.

6.2     No multiple royalties shall be payable because End Products, their 
manufacture, use or sale, are or shall be covered by more than one patent 
application or patent licensed under this Agreement.

6.3     Royalty payments shall be paid in United States dollars in New 
York, NY or at such other place as SKI may reasonably designate consistent 
with the laws and regulations controlling in any foreign country.  Any taxes 
which PDL or any Affiliates or Sublicensee shall be required by law to 
withhold or pay on remittance of the royalty payments shall be deducted from 
royalty paid to SKI.  PDL shall furnish SKI the original copies of all 
official receipts for such taxes.  If any currency conversion shall be 
required in connection with the payment of royalties hereunder, such 
conversion shall be made by using the exchange rate prevailing at a first-
class foreign exchange bank on the last business day of the calendar quarterly 
reporting period to which such royalty payments relate, or, in the case of 
sales by Sublicensees, using the exchange rates provided for in the written 
agreements between PDL and such Sublicensees.

6.4     In the event and to the extent that any payment due hereunder is 
subject to direct taxes levied or assessed by any government authority under 
the law of the country from which payment is made and there is a relevant 
treaty or other provision for the avoidance of double taxation or for other 
relief in respect of tax deducted at the source, PDL shall have the right to 
deduct from the payment any such taxes provided that PDL shall for each such 
deduction furnish to SKI a certificate or other documentary evidence executed 
in the matter required by the relevant government authority to enable SKI to 
obtain relief from double taxation or such other relief in respect of the tax 
so deducted.

6.5     Notwithstanding the provisions of Section 6.1(c) above, PDL's 
obligation to make payments hereunder shall be suspended for any period of 
time during which PDL, its Affiliates or Sublicensees are enjoined or 
otherwise prohibited from exercising the relevant rights under this license by 
the order or judgment of any court or other governmental authority based on 
actual or alleged infringement of any patent of a third party.

ARTICLE VII - REPORTS AND RECORDS

7.1     PDL shall keep full, true and accurate accounts containing all 
particulars that may be necessary for the purpose of showing the amount 
payable to SKI.  Said books of account shall be kept at PDL's principal place 
of business.  Said books and the supporting data shall be open for three (3) 
years following the end of the calendar year to which they pertain, to the 
inspection of an independent certified public accountant retained and paid by 
SKI for the purpose of verifying PDL's royalty statement, but not more 
frequently than once per year.

7.2     PDL agrees to make written reports and royalty payments to SKI 
within sixty (60) days after the close of each calendar quarter during the 
term of this Agreement, beginning with the quarter in which the first Net 
Sales occur.  These reports shall show for the calendar quarter in question 
PDL's Net Sales on sales by it of the End Products on a country-by-country 
basis, details of the quantities of End Products sold in each country and the 
country of manufacture if different, and the royalty due to SKI thereon 
pursuant to Section 6.1(c) above, together with the same information for End 
Products sold by Sublicensees pursuant to Article II above.  Notwithstanding 
the foregoing, with respect to sales of End Products by Sublicensees, PDL's 
reports hereunder shall be required to include only information regarding Net 
Sales of Sublicensees reflected in the reports required by Section 7.3 below 
which are received by PDL during the calendar quarter in question.  
Concurrently with the making of each such report, PDL shall make any payment 
due to SKI of royalties for the period covered by such report.

7.3     In order to facilitate the reporting and payment of royalties by 
PDL on Net Sales of End Products made by Sublicensees, PDL agrees to require, 
as a term of any sublicense agreement that the other party to such agreement 
shall render written reports to PDL of Net Sales of End Products by such party 
no less frequently than twice per year and in sufficient detail to enable the 
royalties payable by PDL hereunder to be determined ("Third Party Reports").  
PDL shall also require such parties to keep records concerning such Net Sales 
for a period of at least three (3) years, and to permit reasonable examination 
of such records by PDL or an independent accounting firm reasonably 
satisfactory to PDL.

7.4     SKI agrees that the information set forth in (a) PDL's reports 
required by Sections 7.2, (b) PDL's records subject to examination under 
Section 7.1, and (c) all Third Party Reports shall be maintained in confidence 
by SKI and the independent accounting firm selected by SKI pursuant to 
Section 7.1, shall not be used by SKI or such accounting firm for any purpose 
other than verification of the performance by PDL of its obligations 
hereunder, and shall not be disclosed by SKI or such accounting firm to any 
other person.

ARTICLE VIII - TECHNICAL KNOW-HOW

8.1     Promptly after the execution of this Agreement, and during the 
first five (5) years of the term of this Agreement, SKI shall disclose and 
furnish to PDL all Technical Information and Know-How which is requested by 
PDL and which is known or possessed by SKI or any of its Affiliates; provided, 
however, that SKI shall not be obligated to disclose any such information 
after the execution of this Agreement from a third party pursuant to a written 
agreement which prohibits the disclosure thereof.

8.2     During the first five (5) years of the term of this Agreement, 
subject to any restrictions imposed upon PDL by a Corporate Partner, PDL shall 
disclose and furnish to SKI (for use in its research programs only) Technical 
Information and Know-How relevant to the clinical use of the Product which is 
requested by SKI and which is known or possessed by PDL or any of its 
Affiliates; provided, however, that PDL shall not be obligated to disclose any 
such information acquired after the execution of this Agreement from a third 
party pursuant to a written agreement which prohibits the disclosure thereof.

8.3      Each of the parties, for itself and its Affiliates, undertakes 
during the term of this Agreement, to hold in confidence and not to disclose 
the Technical Information and Know-How received from the other (a) in the case 
of PDL, to any third party, and (b) in the case of SKI, to any person other 
than Dr. David Scheinberg or personnel under his supervision and then such 
disclosure may be made only while such persons are associated with SKI or its 
Affiliates; provided that such undertaking shall not apply to any portion of 
said Technical Information and Know-How which:
        (i)     was known to the receiving party or any of its 
        Affiliates prior to its receipt by the receiving party or 
        any of its Affiliates hereunder;
        (ii)    is received at any time by the receiving party or any 
        of its Affiliates in good faith from a third party lawfully 
        in possession of the same and having the right to disclose 
        the same;
       (iii)   is as of the date of the receipt by the receiving 
       party or any of its Affiliates in the public domain or 
       subsequently enters the public domain other than by reason 
       of acts or omissions of the employees or agents of the 
       receiving party or any of its Affiliates;

and provided further that nothing contained herein shall prevent PDL or any of 
its Affiliates from using and disclosing the Technical Information and Know-
How received from SKI in connection with applying for and securing 
governmental authorizations for the marketing of Licensed Products, in 
connection with negotiations or discussions with a Corporate Partner provided 
that such disclosure takes place pursuant to a confidentiality agreement 
limiting use of the Technical Information and Know-How to evaluation of this 
license or operation pursuant to a subsequent sublicense agreement, or 
otherwise in the performance of their obligations under this Agreement.

8.4     Prior to public disclosure or submission for publication of a 
manuscript describing the results of any aspect of the Technical Information 
and Know-How, the party disclosing or submitting such a manuscript 
("Disclosing Party") shall send the other party ("Responding Party") by 
express air-mail a copy of the manuscript to be submitted and shall allow the 
Responding Party a reasonable time period (not to exceed sixty (60) days from 
the date of mailing) in which to determine whether the manuscript contains 
subject matter of which patent protection should be sought (prior to 
publication of such manuscript) for the purpose of protecting an invention 
conceived or developed in connection with the parties' scientific 
collaboration hereunder, or whether the manuscript contains confidential 
information belonging to the Responding Party.  After the expiration of sixty 
(60) days from the date of mailing such manuscript, the Disclosing Party shall 
be free to submit such manuscript for publication and publish or otherwise 
disclose to the public such research results. Should the Responding Party 
believe the subject matter of the manuscript contains confidential information 
or a patentable invention of substantial commercial value to the Responding 
Party, then prior to the expiration of sixty (60) days from the date of 
mailing of such manuscript to it by the Disclosing Party, Responding Party 
shall notify the Disclosing Party in writing of its determination that such 
manuscript contains such information or subject matter for which patent 
protection should be sought.  Upon receipt of such written notice from the 
Responding Party, the Disclosing Party shall delay public disclosure of such 
information or submission of the manuscript for an additional period of sixty 
(60) days to permit preparation and filing of a patent application on the 
disclosed subject matter.  The Disclosing Party shall thereafter be free to 
publish or disclose such information, except that the Disclosing Party may not 
disclose any confidential information of the Responding Party in violation of 
Section 8.3 hereof.  Each Party agrees to give the other party reasonable 
opportunity to review and comment on any proposed publication arising from the 
Program.  Determination of authorship for any paper or patent shall be in 
accordance with accepted scientific practice.  Should any questions on 
authorship arise, this will be determined by good faith consultation between 
the parties.

ARTICLE IX - PATENT MATTERS

9.1     SKI shall seek prompt issuance of, and maintain, at its expense 
(for reimbursement pursuant to Paragraph 9.3 below), the Licensed Patents.  
SKI shall keep PDL informed of, and shall provide to PDL copies of, all 
applications and correspondence from or on behalf of SKI and its Affiliates to 
governmental patent offices, and all correspondence and documents received 
from governmental patent offices.  SKI shall provide PDL with reports no less 
frequently than once per year listing all patents and patent applications 
which comprise the Licensed Patents identifying them by country and patent or 
application number, and briefly describing the status thereof,  Prior to 
filing or amending any patent application which constitutes the Licensed 
Patents, SKI shall submit such application to PDL for its review and 
consultation.

9.2     If SKI shall decide to discontinue any such prosecution, or shall 
decide not to maintain any patent, or not to file a patent application on an 
invention under the Licensed Patents, or not file a patent application on an 
invention under the Licensed Patents, or not to file same in  a particular 
country, it shall promptly notify PDL in writing and in reasonably sufficient 
time for PDL to assume such prosecution or maintenance, or file such patent 
application, and shall take the necessary steps and execute the necessary 
documents to permit PDL to assume the filing, prosecution or maintenance of 
the same at PDL's expense and control.  All amounts paid by PDL shall be fully 
creditable as specified in Section 6.1(b) against royalties payable by PDL 
under Section 6.1(c).

9.3     PDL shall reimburse SKI on a quarterly basis for one-half (1/2) of all 
documented out-of-pocket expenses incurred by SKI after the execution of this 
Agreement in connection with 
the filing, prosecution and maintenance of all Licensed Patents in countries 
agreed to by PDL.  All amounts paid by PDL shall be fully creditable as 
specified in Section 6.1(b) against royalties payable by PDL under 
Section 6.1(c).

9.4     [   ]

9.5     PDL shall have a right of first refusal to obtain an exclusive 
license under any inventions or discoveries for therapeutic agents outside the 
Field, whether patentable or not, which are made by employees or agents of SKI 
or its Affiliates in the course of their activities under the Program.

9.6     (a)     In the event of a joint invention or discovery in the Field 
made by one or more employees of both PDL and SKI or their respective 
Affiliates in the course of their activities under the Program, whether 
patentable or not, PDL shall have sole and exclusive rights to such invention 
or discovery, without any obligation to pay royalties or other consideration.  
SKI and its Affiliates shall cooperate in promptly taking all such actions and 
executing all such documents as may be reasonably necessary to vest in PDL 
exclusive ownership and rights to such invention or discovery.
(b)     In the event of a joint invention or discovery outside the 
Field made by one or more employees of both PDL and SKI or their respective 
Affiliates in the course of their activities under the Program, whether 
patentable or not, PDL and SKI shall each have non-exclusive rights to such 
invention or discovery without any obligation to account to the other for use 
thereof.  PDL and SKI shall consult together and cooperate in taking 
reasonable steps to protect such invention or discovery by patent or 
otherwise, with all costs to be shared equally.  PDL shall have a right of 
first refusal to obtain sole and exclusive rights to any such invention or 
discovery by acquiring SKI's rights therein.

9.7     If  PDL becomes aware of a suspected infringement of the Licensed 
Patents, it shall notify SKI in reasonable detail.  If the alleged 
infringement consists of any act which, if done by PDL, would be within the 
scope of the license granted under this Agreement, SKI and PDL shall (within a 
reasonable tune of said notification) consult together with a view to agreeing 
upon a course of action to be pursued, which action shall be taken by SKI at 
SKI's sole expense.  In addition, if any such infringement is resulting in 
sales of competing products by parties other than PDL and its Affiliates and 
Sublicensees exceeding [   ] of the sales of PDL, its Affiliates and 
Sublicensees for a period of six (6) months or more, then, in addition to 
PDL's rights under Section 10.4, PDL shall be entitled to reduce the royalty 
rates otherwise payable hereunder to the lower of the two rates provided for 
the relevant class of product as set forth in Section 6.1(c) until SKI has 
taken steps reasonably acceptable to PDL to prevent such unlicensed 
competition.  Further, in such event, PDL shall be entitled to institute 
actions or proceedings as appropriate to prevent such infringement and PDL may 
retain any damages or other sums received by PDL in connection with such 
actions or proceedings.

9.8     SKI represents and warrants that, except as disclosed on 
Schedule B, neither SKI nor any of its Affiliates is aware of any patent or 
other proprietary right of any third party which is or will be infringed by 
the Licensed Patents or the Technical Information and Know-How being provided 
by SKI hereunder, or by any acts contemplated by this Agreement.  SKI and its 
Affiliates will inform PDL of any such potential infringement promptly upon 
becoming aware of such potential infringement.

9.9     [   ]

ARTICLE X - TERM AND TERMINATION

10.1    This Agreement shall be effective as of the date first written 
above and shall continue in effect until the expiration of the last to expire 
of the Licensed Patents or until all royalty obligations arising hereunder 
have terminated, whichever shall last occur.

10.2    Should PDL fail in its payment to SKI of royalties due in 
accordance with the terms of this Agreement, SKI shall have the right to serve 
notice upon PDL by certified mail at the address designated in Article XV 
hereof, of its intention to terminate this Agreement within thirty (30) days 
after receipt of said notice of termination unless PDL shall pay or cause to 
be paid to SKI within the thirty (30) day period, all such royalties due and 
payable.  Upon the expiration of the thirty (30) day period, if PDL shall not 
have paid or cause to be paid all such royalties due and payable, the rights, 
privileges and license granted hereunder shall thereupon immediately 
terminate.

10.3    Upon any material breach or default of this Agreement by PDL, 
other than those occurrences set out in Paragraph 10.2 above which shall 
always take precedence in that order over any material breach or default 
referred to in this Paragraph 10.3, SKI shall have the right to terminate this 
Agreement and the rights, privileges and license granted hereunder by ninety 
(90) days' notice including a detailed explanation of the reasons for 
termination, by certified mail to PDL.  Such termination shall become 
effective unless PDL shall have cured or caused to be cured any such breach or 
default prior to the expiration of the ninety (90) day period from receipt of 
SKI's notice of termination.

10.4    PDL may terminate this Agreement by giving SKI ninety (90) days' 
notice to that effect if (a) PDL considers that substantial unlicensed 
competition is seriously interfering with PDL's exploitation of the Licensed 
Patents under this Agreement and that SKI is not taking appropriate steps to 
seek to prevent such unlicensed competition, or (b) PDL determines to cease 
utilizing all license rights granted hereunder, or (c) SKI or any of its 
Affiliates commits any material breach or default of this Agreement which has 
not been cured within ninety (90) days' notice from PDL to SKI.

10.5    Upon termination of this Agreement for any reason, nothing herein 
shall be construed to release either party from any obligation that matured 
prior to the effective date of such termination.  PDL and its Affiliates and 
Sublicensees may, however, after the effective date of such termination, sell 
all Licensed Products, and complete Licensed Products in the process of 
manufacture at the time of such termination and sell the same, provided that 
PDL shall pay to SKI the royalties thereon as required by Article VI of the 
Agreement and shall submit the reports required by Article VII hereof on the 
sale of Licensed Products.  In addition, the obligations of confidentiality 
and indemnity set forth in Sections 7.4, 8.3, 12.1 and 12.2 shall survive the 
termination or expiration of this Agreement.

ARTICLE XI - ARBITRATION

11.1    Except as to issues relating to the validity, construction or 
effect of any patent licensed hereunder, any and all claims, disputes or 
controversies arising under, out of, or in connection with this Agreement, 
which have not been resolved by good faith negotiations between the parties, 
shall be resolved by final and binding arbitration under the rules of the 
American Arbitration Association.  Arbitration shall take place in the State 
and County of the principal office of the party not initiating such 
arbitration.  The arbitrators shall have no power to add to, subtract from or 
modify any of the terms or conditions of this Agreement.  The award rendered 
by the arbitrator shall include costs of arbitration, reasonable attorneys' 
fees and reasonable costs for expert and other witnesses, and judgment on such 
award may be entered in any court having jurisdiction thereof.  The parties 
shall be entitled to discovery as provided in Sections 1283.05 and 1283.1 of 
the Code of Civil Procedure of the State of California, whether or not the 
California Arbitration Act is deemed to apply to said arbitration.  Nothing in 
this Agreement is deemed as preventing either party from seeking injunctive 
relief (or any other provisional remedy) from any court having jurisdiction 
over the parties and the subject matter of the dispute as necessary to protect 
either party's name, proprietary information, trade secrets, know-how or any 
other proprietary right.  If the issues in dispute involve scientific or 
technical matters, any arbitrator chosen hereunder shall have educational 
training and/or experience sufficient to demonstrate a reasonable level of 
knowledge in the field of biotechnology.  Any award rendered in such 
arbitration may be enforced by any of the parties in a court of competent 
jurisdiction.

11.2    Claims, disputes or controversies concerning the validity, 
construction or effect of any patent licensed hereunder shall be resolved in 
any court having jurisdiction thereof.

ARTICLE XII - PRODUCT LIABILITY

12.1    PDL shall at all times, during the term of this Agreement and 
thereafter, indemnify and hold SKI and its Affiliates and their directors, 
officers, agents and employees, harmless against all claims and expenses, 
including legal expenses and reasonable attorneys' fees, arising out of the 
death of or injury to any person or persons or out of any damage to property 
and against any other claim, proceeding, demand, expense and liability of any  
kind whatsoever resulting from the actions of PDL and its Affiliates and 
Sublicensees hereunder in the production, manufacture, sales, use, consumption 
or advertisement of Licensed Products, subject to SKI  giving to PDL prompt 
notice of any such claim, giving to PDL full control of the defense or 
settlement of any such claim, and giving to PDL such reasonable assistance as 
PDL may request in the defense of such claim; provided, however, that the 
foregoing indemnity obligation shall not apply (i) where such claim, 
proceeding, demand, expense or liability is the result of negligence on behalf 
of SKI or its Affiliates, or its or their staff or agents, (ii) where such 
claim, proceeding, demand, expense or liability is the result of a failure by 
SKI or its Affiliates, or its or their staff or agents, to comply with any 
applicable FDA or other governmental requirement or to adhere to the terms of 
the protocols agreed to under Section 4.4(z), or (iii) where the activities of 
SKI or its Affiliates are not pursuant to, and in accordance with, an 
investigational new drug (IND) application approved by the FDA.

12.2    Except as may be provided otherwise in any clinical trial 
agreement subsequently executed by the parties hereto, SKI and its Affiliates 
shall at all times, during the term of this Agreement and thereafter, 
indemnify and hold PDL and its Affiliates and Sublicensees and their 
directors, officers, agents and employees, harmless against all claims and 
expenses, including legal expenses and reasonable attorneys' fees, arising out 
of the death of or injury to any person or persons or out of any damage to 
property and against any other claim, proceeding, demand, expense and 
liability of any kind whatsoever resulting from the actions of SKI and its 
Affiliates or its or their staff or agents in connection with their activities 
under the Program, subject to PDL giving to SKI prompt notice of any such 
claim, giving to SKI full control of the defense or settlement of any such 
claim, and giving to SKI such reasonable assistance as SKI may request in the 
defense of such claim.

ARTICLE XIII - ASSIGNMENT

PDL shall be entitled to assign its rights hereunder, without the 
written consent of SKI, in whole or in part, to (i) a successor of PDL's 
business, whether by merger, purchase or otherwise, or (ii) any Affiliate or 
Affiliates (which may be substituted directly hereunder for PDL) provided that 
such Affiliate has the technical competence and capability to discharge the 
obligations of PDL hereunder.  At PDL's request, SKI shall enter into a 
separate counterpart agreement with any such assignee, it being expressly 
agreed that PDL shall remain bound by the obligations hereof.  Such 
counterpart agreement shall be the same in form and substance except for 
necessary changes to reflect the extent of the assignment.
Neither party may otherwise assign this Agreement or any rights granted 
hereunder in whole or in part without prior written consent of the other 
party, which consent shall not be unreasonably withheld.

ARTICLE XIV - NON-USE OF NAMES

PDL shall not use the names of Sloan-Kettering Institute for Cancer 
Research nor of the Memorial Sloan-Kettering Cancer Center, nor of the 
Memorial Hospital For Cancer and Allied Diseases nor any adaptation thereof in 
any advertising, promotional or sales literature for the Licensed Products 
without prior written consent obtained from SKI in each case, which consent 
shall not be unreasonably withheld.

ARTICLE XV - PAYMENTS, NOTICES AND OTHER COMMUNICATIONS

Any payment, notice or other communication pursuant to this Agreement 
shall be sufficiently made or given on the date of mailing if sent to such 
party by certified first class mail, postage prepaid, addressed to it at its 
address below or as it shall designate by written notice given to the other 
party:
In the case of SKI:
Sloan-Kettering Institute for Cancer Research
1275 York Avenue
New York, NY 10021
Attention:  Mr. James Quirk, Senior Vice President

In the case of PDL:
Protein Design Labs, Inc.
3181 Porter Drive
Palo Alto, California 94304
Attention:  Laurence Jay Korn, Ph.D., President

with a copy to:
Marta L. Morando
Ware and Freidenrich
400 Hamilton Avenue
Palo Alto, California 94301

ARTICLE XVI - MISCELLANEOUS PROVISIONS

16.1    This Agreement shall be construed, governed, interpreted and 
applied in accordance with the laws of the State of California, USA except 
that questions affecting the construction and effect of any patent shall be 
determined by the law of the country in which the patent was granted.

16.2    The parties hereto acknowledge that this Agreement sets forth the 
entire Agreement and understanding of the parties hereto as to the subject 
matter hereof, and shall not be subject to any change or modification except 
by the execution of a written instrument subscribed to by the parties hereto.

16.3    The provisions of this Agreement are severable, and in the event 
that any provision of this Agreement shall be determined to be invalid or 
unenforceable under any controlling body of law, such invalidity or 
unenforceability shall not in any way effect the validity or enforceability of 
the remaining provisions hereof.

16.4    The failure of either party to assert a right hereunder or to 
insist upon compliance with any term or condition of this Agreement shall not 
constitute a waiver of that right or excuse a similar subsequent failure to 
perform any such term or condition by the other party.

16.5    Neither party shall, without the consent of the other, originate 
any publicity, news release, or other public announcement, written or oral, 
whether to the public press, to stockholders, or otherwise, relating to the 
execution of this Agreement or any amendment hereto, save only such 
announcement or disclosure as in the opinion of legal counsel to the party 
making such announcement is required by law to be made.  The party making such 
announcement will give the other party an opportunity to review the form of 
the announcement before it is made.

IN WITNESS WHEREOF, the parties hereto have caused this License 
Agreement to be executed by their duly authorized representatives as of the 
day and year first set forth above.


SLOAN-KETTERING INSTITUTE FOR CANCER 
RESEARCH

By:/s/ James S. Quirk
     James S. Quirk
     Senior Vice President


PROTEIN DESIGN LABS, INC.


By:/s/ Laurence J. Korn
     Laurence Jay Korn, Ph.D.
     President


                            SCHEDULE A
                     (Revised November ___, 1989)


Docket                Patent         Filing      Patent       Issue
No.      Country      Appln. No.     Date        Number       Date

None


                           SCHEDULE B
(SKI's written policy per   3.5]

 

EXHIBIT 10.13

CONFIDENTIAL TREATMENT REQUESTED
AGREEMENT
Effective as of July 1, 1990, THE BOARD OF TRUSTEES OF THE LELAND 
STANFORD JUNIOR UNIVERSITY, a body having corporate powers under the laws of 
the State of California ("STANFORD"), and PROTEIN DESIGN LABS, INC., a 
Delaware company, having a principal place of business at 2375 Garcia Avenue, 
Mountain View, California 94043 ("PDL"), agree as follows.

1. BACKGROUND

1.1 STANFORD has the exclusive assignment to an invention entitled, 
"Method and Dosage Form Using an Antagonist to Gamma Interferon to Control 
MHC-Associated Autoimmune Disease" ("Invention[s]"), as described in Stanford 
Docket S87-029 and to any Licensed Patent(s), as hereinafter defined, which 
may issue to such Invention(s).

1.2 STANFORD desires to have the Invention(s) perfected and marketed 
at the earliest possible time in order that products resulting therefrom may 
be available for public use and benefit.

1.3 PDL desires to acquire an exclusive, worldwide license under said 
Invention(s) and Licensed Patent(s), for the purpose of undertaking 
development, to manufacture, use, and sell Licensed Product(s). 

1.4 The Invention(s) was made in the course of research supported by 
the National Institutes of Health ("NIH").

2. DEFINITIONS

2.1 "Licensed Patent(s)" means any Letters Patent issued upon 
STANFORD's U.S. Patent Application, Serial Number 087,015, filed August 18, 
1987, including the information contained in such application, with respect to 
the Invention(s), any foreign patents corresponding thereto, and/or any 
divisions, continuations, continuations-in-part, or reissue thereof.  The 
table of currently pending patent applications is shown as Exhibit I.  

2.2 "Licensed Product(s)" means any product or part thereof, the 
manufacture, use, or sale of which is covered by a valid claim of an issued, 
unexpired Licensed Patent(s) directed to the Invention(s).  A claim of an 
issued, unexpired Licensed Patent(s) shall be presumed to be valid unless and 
until it has been disclaimed in writing by STANFORD or held to be invalid or 
not infringed by a final judgment of a court of competent jurisdiction from 
which no appeal can be or is taken.

2.3 "Net Sales" means the gross selling price of the Licensed 
Product(s) in the form in which it is sold or used, less the following items 
but only insofar as they actually pertain to the disposition of such Licensed 
Product(s) by PDL or sublicensee(s) and are included in such gross selling 
price, and (except Item [d]) are separately billed:
(a) Import, export, excise, value-added, and sales taxes, plus 
custom duties;
(b) Costs of insurance, packing, and transportation from the 
place of manufacture to the customer's premises or point of installation;
(c) Costs of installation at the place of use; and
(d) Credit for returns, allowances, or trades.
In the case of PDL's sublicensee(s), "Net Sales" may be defined as said 
sublicensee(s) normally calculate and define "Net Sales" so long as it is 
substantially similar to the above definition.

2.4 "Exclusive" means STANFORD shall not grant further licenses, 
subject to Article 4.  STANFORD has not granted any licenses except for the 
license to the U.S. Government herein attached (Exhibit 2).

2.5 "Combination Product(s)" means Licensed Product(s) sold in a 
combination package or kit containing other active products, such as 
antibodies, antigens, and enzymes.  Net Sales, for purposes of determining 
royalty payments on the combination package, shall be calculated using one of 
the following methods on a country-by-country basis:
(a) By multiplying the net selling price of that combination 
package by the fraction A/A+B; where A is the gross selling price, during the 
royalty paying period in question, of the Licensed Product(s) sold separately, 
and B is the gross selling price, during the royalty period in question, of 
the other active products sold separately; or
(b) If no such separate sales are made of the Licensed 
Product(s) or any of the active products in such combination package during 
the royalty paying period in question, Net Sales will be negotiated in good 
faith.

2.6 "PDL" means PDL and Affiliates.  An Affiliate means any 
corporation or other business entity controlled by, controlling, or under 
common control with PDL.  For this purpose, "control" means direct or indirect 
beneficial ownership of at least fifty percent (50%) of the voting stock, or 
at least fifty percent (50%) interest in the income of such corporation or 
other business.

2.7 "First Commercial Sale" means first sale of a non-orphan drug (as 
currently defined under U.S. law) Licensed Product(s) following FDA approval 
of such Licensed Product(s).

3. GRANT

3.1 STANFORD hereby grants and PDL hereby accepts a worldwide license, 
which includes the right to sublicense, to make, have made, use, and sell 
Licensed Product(s).

3.2 Said license shall be Exclusive for a term commencing as of July 
1, 1990, and ending [   ] years from the date of First Commercial Sale of a 
Licensed Product(s) by PDL or its sublicensee(s); PDL agrees to promptly 
inform STANFORD in writing of the date of First Commercial Sale.

3.3 Upon request by PDL, STANFORD agrees to extend the period of 
exclusivity if, in STANFORD's judgment, such extension is justifiable, taking 
into consideration PDL's development costs and return on its investment.

3.4 After the Exclusive period, the license shall be nonexclusive 
until expiration of the last to expire of Licensed Patent(s).

3.5 STANFORD retains the right to practice the Invention(s) for its
internal research purposes but will not commercialize the Invention(s).

4. GOVERNMENT RIGHTS

This Agreement is subject to all of the terms and conditions of Public 
Law 96-517 as amended to date, and PDL agrees to take all action reasonably 
necessary on its part as Licensee to enable STANFORD to satisfy its obligation 
thereunder with NIH, relating to any Invention(s).  PDL is not obligated to 
disclose confidential information under this Article 4.

5. ROYALTIES

5.1 PDL agrees to pay to STANFORD a creditable, non-refundable license 
issue royalty fee of [   ] upon signing the Agreement.

5.2 PDL also shall pay a [              ] annual advance on earned royalties 
according to the following schedule:
(a) [   ] on July 1, 1991, if no Licensed Patent(s) has issued;
(b) [   ] on July 1, 1992, if no Licensed Patent(s) has issued; 
and 
(c) [   ] on each July 1 after a Licensed Patent(s) has issued 
with a claim covering at least one (1) major autoimmune disease for as long as 
this license shall be Exclusive.  During the nonexclusive period, if any, PDL 
will not be required to pay minimum annual advances.
All advance royalty payments are nonrefundable but they are creditable 
against earned royalties to the extent provided in Paragraph 5.4.

5.3 In addition, PDL shall pay STANFORD earned royalties 
(a) [   ] on Net Sales by PDL and its sublicensee(s) of Licensed 
Product(s) during the period that the license to PDL is Exclusive; and
(b) [   ] of Net Sales during the period the license to PDL is 
nonexclusive.
If PDL is required to obtain additional licenses not covered by this 
Agreement in order to develop, manufacture, sell, or market Licensed 
Product(s), PDL may reduce its earned royalty payments to STANFORD by an 
amount equal to the sum of royalties under additional license(s) provided that 
the royalty paid to STANFORD will not be less than [   ] of the rates 
specified above.

5.4 Creditable payments under this Agreement shall be credited to PDL 
against up to  [   ] of each earned royalty payment which PDL would be 
required to pay pursuant to Paragraph 5.3 until the entire credit is 
exhausted.

5.5 The royalty on sales in currencies other than U.S. Dollars shall 
be calculated using the appropriate foreign exchange rate for such currency 
quoted by the Bank of America (San Francisco) foreign exchange desk, on the 
close of business on the last banking day of each calendar quarter.  Royalty 
and payments to STANFORD shall be in U.S. Dollars an shall be net of all non-
U.S. taxes.  In the case of PDL's sublicensee(s), the currency conversion 
exchange rate may be computed as sublicensee(s) normally computes such 
transactions.

6. REPORTS, PAYMENTS AND ACCOUNTING

6.1 Quarterly Royalty Payment and Report.  PDL shall make written 
reports and royalty payments to STANFORD within ninety (90) days after the end 
of each calendar quarter following the First Commercial Sale.  This report 
shall state the number, description, and aggregate Net Sales of Licensed 
Product(s) during such completed calendar quarter, and resulting calculation 
pursuant to Paragraph 5.3 of earned royalty payment due STANFORD for such 
completed calendar quarter.  Concurrent with the making of each such report, 
PDL shall include payment due STANFORD of royalties for the calendar quarter 
covered by such report.  In the case of sublicensee(s), PDL shall report 
sublicensee sales within thirty (30) days of receipt by PDL of sublicensee 
reports and pay STANFORD in the next applicable quarter.

6.2 Accounting.  PDL agrees to keep records for a period of two (2) 
years showing the manufacturing, sales, use, and other disposition of products 
sold or otherwise disposed of under the license herein granted in sufficient 
detail to enable the royalties payable hereunder by PDL to be determined, and 
further agrees to permit its books and records to be examined by an 
independent Certified Public Accountant satisfactory to PDL nominated by 
STANFORD from time to time, but not more than once a calendar year, to the 
extent necessary to verify reports provided for in Paragraph 6.1.  Such 
examination is to be made at the expense of STANFORD, and all information 
shall be treated confidentially by STANFORD.

6.3 Progress Report.  On or before September 1, starting with 
September 1, 1991, of each year until PDL markets a Licensed Product(s), PDL 
shall make a written report to STANFORD covering the preceding year regarding 
the progress of PDL toward commercial use of Licensed Product(s).  STANFORD 
will use all reasonable efforts to keep any progress report, if clearly marked 
"Confidential" confidential.  Such report shall include, as a minimum, 
information sufficient to enable STANFORD to satisfy reporting requirements of 
the U.S. Government and for STANFORD to ascertain progress by PDL toward 
meeting the diligence requirements of Paragraph 12.1.  If PDL does not submit 
the required reports, or if PDL has not demonstrated diligence as required by 
Paragraph 12.1, STANFORD may terminate upon failure of PDL to cure the defect 
within thirty (30) days after receipt of written notice from STANFORD.

6.4 PDL will reimburse STANFORD for any reasonable costs incurred by 
STANFORD after July 1, 1990, in connection with the filing, prosecution of 
patent applications, and maintenance of Licensed Patent(s), and these expenses 
shall be paid within thirty (30) days of receipt of invoice of such costs.  
With respect to foreign prosecution, STANFORD and PDL will agree on the 
countries in which to pursue patent protection.  STANFORD  will employ 
mutually agreeable patent counsel and keep PDL informed of patent prosecution.

7. NEGATION OF WARRANTIES

7.1 STANFORD warrants that STANFORD has an exclusive assignment to 
Licensed Patent(s) and that STANFORD has the right to grant licenses under 
Public Law 96-517 as amended.

7.2 Except for Paragraph 7.1, nothing in this Agreement is or shall be 
construed as:
(a) A warranty or representation by STANFORD as to the validity 
or scope of any Licensed Patent(s);
(b) A warranty or representation that anything made, used, sold, 
or otherwise disposed of under any license granted in this Agreement is or 
will be free from infringement of patents, copyrights, trademarks, or other 
rights of third parties.
(c) An obligation to bring or prosecute actions or suits against 
third parties for infringement, except to the extent and in the circumstances 
described in Article 11, or 
(d) Granting by implication, estoppel, or otherwise any licenses 
under patents of STANFORD or other persons other than Licensed Patent(s), 
regardless of whether such patents are dominant or subordinate to any Licensed 
Patent(s).  STANFORD is aware of the following issued patents and pending 
applications which may or may not be infringed by PDL in practicing the claims 
of the Invention(s).
       (i) U.S. Patent No. 4,237,224 issued December 2, 1980, 
       U.S. Patent No. 4,468,464 issued August 28, 1984, and U.S. Patent No. 
       4,740,470 issued April 26, 1988 (Cohen-Boyer patents).  PDL agrees that 
       nothing in this Agreement grants PDL any express or implied license or 
       right under or to the above Cohen-Boyer patents;
       (ii) U.K. Patent Application No. 8607679 filed 27.03.86 
       (Winter patent);
       (iii) U.S. Patent No. 4,816,397 issued March 28, 1989 
       (Celltech patent);
       (iv) U.S. Patent No. 4,816,567 issued March 28, 1989 
       (Genentech patent); and 
       (v) U.S. Patent Application 644,473 filed August 27, 1984, 
       and all continuations, divisionals or continuations-in-part, and foreign 
       counterparts (STANFORD/ Columbia University chimeric inventions).

7.3 Except as expressly set forth in this Agreement STANFORD MAKES NO 
REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR 
IMPLIED.  THERE ARE NO EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY OR 
FITNESS FOR A PARTICULAR PURPOSE, OR THAT THE USE OF LICENSED PRODUCT(S) WILL 
NOT INFRINGE ANY PATENT, COPYRIGHT, TRADEMARK, OR OTHER RIGHTS.

8. INDEMNITY

8.1 PDL agrees to indemnify, hold harmless, and defend STANFORD and 
its trustees, officers, employees, students, and agents against any and all 
claims for death, illness, personal injury, property damage, and improper 
business practices arising out of the manufacture, use, sale, or other 
disposition of Invention(s), Licensed Patent(s), or Licensed Product(s) by PDL 
or sublicensee(s).

8.2 PDL agrees not to proceed with [   ] until the appropriate 
insurance limits have been mutually agreed upon in writing by STANFORD and 
PDL, provided that premiums for such insurance are reasonable and obtainable.  
Such insurance shall cover the activities of PDL contemplated by this 
Agreement, including public liability and product liability.

8.3 In order to meet the obligations of this Article 8, PDL agrees to 
notify STANFORD thirty (30) days prior to the onset of Phase III clinical 
trials and to inform STANFORD as to the expected number of patients 
participating in such clinical trials.

8.4 Insurance shall be procured and maintained with a reputable and 
financially secure insurance carrier.  Such insurance shall include Stanford 
University, Stanford University Hospital, their trustees, directors, officers, 
employees, and agents, as additional insureds with respect to this Agreement, 
and shall provide that it shall not be canceled or materially altered except 
upon at least thirty (30) days written notice to STANFORD.

9. MARKING

When reasonable, prior to the issuance of patents on the Invention(s), 
PDL agrees to mark Licensed Product(s) (or its containers or labels) made, 
sold, or otherwise disposed of by it under the license granted in this 
Agreement with the words "Patent Pending," and following the issuance of one 
or more patents, with the numbers of the Licensed Patent, if applicable.

10. PROMOTIONAL ADVERTISING

PDL agrees not to identify STANFORD in any promotional advertising or 
other materials to be disseminated to the public or any portion thereof or to 
use the name of any STANFORD faculty member, employee, or student or any 
trademark, service mark, trade name, or symbol of STANFORD or the Stanford 
University Hospital, or that is associated with either of them, without 
STANFORD's prior written consent.

11. INFRINGEMENT BY OTHERS:  PROTECTION OF PATENTS

11.1 Both parties shall promptly inform the other party of any 
suspected infringement of any Licensed Patent(s) by a third party.  During the 
Exclusive period of this Agreement, STANFORD and PDL each shall have the right 
to institute an action for infringement of the Licensed Patent(s) against such 
third party in accordance with the following:
(a) If STANFORD and PDL agree to institute suit jointly, the 
suit shall be brought in both their names, the out-of-pocket costs thereof 
shall be borne equally, and any recovery or settlement shall be shared 
equally.  PDL and STANFORD shall agree to the manner in which they shall 
exercise control over such action.  STANFORD may, if it so desires, also be 
represented by separate counsel of its own selection, the fees for which 
counsel shall be paid by STANFORD;
(b) In the absence of an agreement to institute a suit jointly, 
PDL may institute suit, and, at its option, join STANFORD as a plaintiff.  PDL 
shall bear the entire cost of such litigation and shall be entitled to retain 
the entire amount of any recovery or settlement;
(c) In the absence of an agreement to institute a suit jointly 
and if PDL has not notified STANFORD that it has decided to join in or 
institute a suit, as provided in (a) or (b) above, STANFORD may institute a 
suit and, at its option, join PDL as a plaintiff.  STANFORD shall bear the 
entire cost of such litigation and shall be entitled to retain the entire 
amount of any recovery or settlement; and
(d) If STANFORD decides to institute suit, then it shall notify 
PDL in writing.  PDL's failure to notify STANFORD in writing, within thirty 
(30) days after the date of the notice, that it will join in enforcing the 
patent pursuant to the provisions hereof, shall be and be deemed conclusively 
to be PDL's assignment to STANFORD of all rights, causes of action, and 
damages resulting from any such alleged infringement and STANFORD shall be 
entitled to retain the entire amount of any recovery of settlement.  
Furthermore, at its option, STANFORD may join PDL as plaintiff.

11.2 Should either STANFORD or PDL commence a suit under the provisions 
of Paragraph 11.1 and thereafter elect to abandon the same, it shall give 
timely notice to the other party who may, if it so desires, continue 
prosecution of such suit, provided, however, that the sharing of expenses and 
any recovery in such suit shall be prorated as of the date the party elects to 
abandon the suit.

12. COMMERCIAL APPLICATION, SUBLICENSES

12.1 As an inducement to STANFORD to enter into this Agreement, PDL 
agrees to use commercially reasonable efforts and diligence to proceed with 
the development, manufacture, and sale of Licensed Product(s) and to develop 
markets for the Licensed Product(s), subject to any delays or hindrances 
beyond the control of PDL or due to force majeure.  PDL intends to develop 
Licensed Product(s) according to the following schedule.  Failure to meet the 
schedule will not be a breach of this Agreement as long as PDL can demonstrate 
to STANFORD's reasonable satisfaction PDL's diligence in developing Licensed 
Product(s):

June 1991:          Either produce and characterize, or complete the 
                    licensing of, a high-affinity, neutralizing anti-
                    gamma interferon (anti-IFN) antibody.


December 1991:      Clone and sequence the light and heavy chain genes 
                    of the anti-IFN antibody.

June 1992:          Produce and characterize a mouse-human chimeric 
                    anti-IFN antibody.  Complete the protein design of 
                    the (fully) humanized anti-IFN antibody.

December 1992:      Produce and characterize a high-affinity, humanized 
                    anti-IFN antibody.

June 1993:          Produce the humanized anti-IFN antibody in 
                    sufficient quality and quantity for animal 
                    toxicology studies.

December 1993:      Complete all toxicology studies required for IND 
                    submission.  Create master cell bank and complete 
                    all cell tests (e.g., virology) needed for IND 
                    submission.

June 1994:          File IND for Phase I trials acceptable to FDA and 
                    designed to show some indication of efficacy as well 
                    as safety.

December 1994:      Complete Phase I trials.



12.2 If PDL is unable (except for reasons or circumstances beyond PDL's 
control) or unwilling to serve or develop a potential market for which there 
is a willing and capable sublicensee(s), PDL will, at STANFORD's request, 
negotiate in good faith a sublicense hereunder.

12.3 Any sublicense granted by PDL under this Agreement shall be 
subject and subordinate to terms and conditions of this Agreement, except:
(a) Sublicense terms and conditions shall reflect that any 
sublicensee(s) shall not further sublicense; and
(b) The earned royalty rates and other fees payable to PDL by 
PDL's sublicensee(s) may be at higher rates and fees than of this Agreement.
Any such sublicense shall also expressly include the provisions of 
Articles 6, 7 and 8 for the benefit of STANFORD.

13. TERMINATION

13.1 PDL may terminate this Agreement by giving STANFORD notice in 
writing at least thirty (30) days in advance of the effective date of 
termination selected by PDL.

13.2 STANFORD may terminate this Agreement if PDL:
(a) is in default in payment of royalty or providing of reports;
(b) is in breach of any provision hereof materially affecting 
this Agreement; or
(c) provides any materially false report;
and PDL fails to remedy any such default, breach, or false report within 
thirty (30) days after written notice thereof by STANFORD.

13.3 Surviving any termination are:
(a) PDL's obligation to pay royalties accrued or accruable;
(b) Any cause of action or claim of PDL or STANFORD, accrued or 
to accrue, because of any breach or default by the other party; and
(c) The application provisions of Articles 6, 7, and 3.

14. ASSIGNMENT

        This Agreement may not be assigned except as part of a sale or transfer 
of substantially the entire business relating to operations pursuant to this 
Agreement.

15. ARBITRATION

15.1 Any controversy arising under or related to this Agreement, or any 
disputed claim by either party against the other under this Agreement 
excluding any dispute relating to patent validity or infringement arising 
under this Agreement, shall be settled in arbitration in accordance with the 
Licensing Agreement Arbitration Rules of the American Arbitration Association.  
Upon request of either party, arbitration will be by:
(a) A third party arbitrator mutually agreed upon in writing by 
PDL and STANFORD within thirty (30) days of such arbitration request; or
(b) A member of the American Bar Association selected in 
accordance with American Arbitration Association rules.
If the issues in dispute involve scientific or technical matters, any 
arbitrator chosen hereunder shall have educational training and/or experience 
sufficient to demonstrate a reasonable level of knowledge in the field of 
biotechnology.
Judgment upon the award rendered by the Arbitrator may be entered in any 
court having jurisdiction thereof.

15.2 The parties shall be entitled to discovery at their own expense in 
like manner as if the arbitration were a civil suit in a general district 
court.

15.3 Any arbitration shall be held at Stanford, California, unless the 
parties hereto mutually agree in writing to another place.

16. NOTICES
        All notices under this Agreement shall be deemed to have been fully 
given when done in writing and deposited in the United States mail, registered 
or certified, and addressed as follows:

To STANFORD:    Office of Technology Licensing
                Stanford University
                857 Serra Street, 2nd Floor
                Stanford, CA 94305-6225
                Attention:  Director, Technology Licensing

To PDL:         Protein Design Labs, Inc.
                2375 Garcia Avenue
                Mountain View, CA 94043
                Attention:  President

        Either party may change its address upon written notice to the 
other party.

17. APPLICABLE LAW

        This Agreement shall be construed, interpreted, and applied in 
accordance with the laws of the State of California.

        IN WITNESS WHEREOF, the parties hereto have executed this Agreement in 
duplicate originals by their duly authorized officers or representatives.


THE BOARD OF TRUSTEES
OF THE LELAND STANFORD 
JUNIOR UNIVERSITY


By: /s/ Katharine Ku
Title: Acting Director, Technology 
Licensing
Date: June 7, 1990      


PROTEIN DESIGN LABS, INC.


By: /s/ Laurence Jay Korn
Title: President
Date: June 7, 1990 




CONFIDENTIAL TREATMENT REQUESTED

                               Exhibit 1

                   TABLE OF PATENT APPLICATIONS AND PATENTS

             Patent         Patent                                  Patent 
             Application    Application     Patent   Patent Issue   Expiration
Country      Number         Filing Date     Number   Date           Date    

U.S.          [   ]           [   ]
              [   ]           [   ]
Australia     [   ]           [   ]
Japan         [   ]           [   ]
Europe        [   ]           [   ]
Canada        [   ]           [   ]


                            Exhibit 2

              LICENSE TO THE UNITED STATES GOVERNMENT



        WHEREAS, C. Jacob, H. McDevitt, P. van der Meide, and J. Holoshitz, of 
Stanford University, have invented "Method and Dosage Form Using An Antagonist 
To Gamma Interferon To Control MHC-Associated Autoimmune Disease" and filed a 
patent application thereon in United States bearing Serial No. 087.015 filing 
date August 18, 1988;

        WHEREAS, the invention was made in the course of research supported by 
the Department of Health and Human Services; and

        WHEREAS, the United States Government is entitled to certain rights in 
and to said invention and application by reason of the terms of such support; 
and

        WHEREAS, the Stanford University, hereinafter called the "Licensor" has 
acquired by assignment from the inventor the entire right, title, and interest 
of the inventor to such invention;

NOW, THEREFORE

        1.     The Licensor, in consideration of the premises and other good and
valuable considerations, hereby grants and conveys to the United States 
Government a royalty-free, nonexclusive and irrevocable license for 
governmental purposes and on behalf of any foreign government pursuant to any 
existing or future treaty or agreement with the United States under the 
aforesaid patent application, and any and all divisions or continuations, and 
in any and all patents or reissues which may be granted thereon during the 
full term or terms thereof.  As used herein, "governmental purpose" means the 
right of the Government of the United States, including any agency thereof, to 
practice and have practiced (made or have made, used or have used, sold or 
have sold) in connection with programs funded in whole or in part by the 
Federal Government throughout the world by or on behalf of the Government of 
the United States.

        2.      The Licensor convenants and warrants that he has the right to 
grant the foregoing license, and that any assignment which he may make of the 
invention or the said patent applications or patents thereon, shall expressly 
be made subject to this license.

        3.     The Licensor agrees that the Government shall not be estopped at
any time to contest the enforceability, validity, scope of, or title to, any 
patent or patent application herein licensed.

                                  The Board of Trustees of the
                                  Leland Stanford Junior University       
                                  (Institution)
                                  /s/ Katharine Ku
                                  (Signature)
                                  Katharine Ku
                                  (Print or type name)
November 8, 1988                  Associate Director, Technology Licensing
(Date)                            (Official Title)


I, Brenda Whitmarsh certify that I am the Asst. Secretary of the Institution 
named as Licensor herein; that Katherine Ku, who signed this License on behalf 
of the Institution is Assoc. Director, Tech. Licensing of said Institution; 
and that said License was duly signed for and in behalf of said Institution by 
authority of its governing body, and is within the scope of its corporate 
powers.


SEAL                                /s/ Brenda Whitemarsh   November 11, 1988
                                    (Signature)             (Date)



 

EXHIBIT 10.14

CONFIDENTIAL TREATMENT REQUESTED

SOFTWARE LICENSE AGREEMENT
Between Protein Design Labs, Inc. and Molecular Applications Group

This Software License Agreement ("Agreement") is entered into by and 
among Protein Design Labs, Inc., a Delaware corporation having a place of 
business at 2375 Garcia Avenue, Mountain View, California 94043 ("PDL"), and 
Molecular Applications Group, a California corporation having a place of 
business at 880 Lathrop, Stanford, California 94305 ("MAG") and Michael 
Levitt, a natural person having a residence at 880 Lathrop, Stanford, 
California 94305 ("Levitt").  The effective date of this Agreement shall be 
September 1, 1990 ("Effective Date").
RECITALS:

A.      MAG's president and sole shareholder, Levitt, is the developer of 
certain software described in Parts 1 ("Antibody Model") and II ("Other 
Software") of Exhibit A ("Product Description").

B.      MAG is the exclusive licensee of, and has the right to sublicense, 
such software and is considering, but undertakes no obligation with respect 
to, the future development, acquisition or licensing of additional programs 
related to the modeling of proteins.

C.      PDL desires to reproduce and use such software for its internal 
business purposes and to use one copy of a source code listing of certain of 
such software for the particular purposes described below.

D.      PDL desires to obtain certain licenses with respect to the 
foregoing, subject to certain permitted academic uses of such software, all as 
more fully set forth below.

AGREEMENT:

In consideration of the mutual covenants and other valuable 
consideration set forth herein, the parties agree as follows:

1.      Definitions.
For purposes of this Agreement, the following terms shall have the 
respective meanings indicated below.

1.1     Academic Use.  "Academic Use" shall mean use of the 
Software, governed by a binding, signed agreement substantially as 
protective of PDL's rights as the form attached hereto as Exhibit B 
("Academic License Agreement"), by Levitt's students and professional 
colleagues under Levitt's supervision ("Academic Users") for academic, 
non-commercial purposes or in the course of Levitt's consulting work for 
companies other than commercial companies.

1.2     License Term.  "License Term" shall mean the term, as set 
forth in Paragraph 7 ("Term and Termination") below, of the licenses 
granted in this Agreement to the Other Software and, as set forth in 
Paragraph 4.1 ("Updates") below, to certain enhancements, error 
corrections, modifications and other programs.

1.3     Software.  "Software" shall mean protein modeling software 
programs consisting of (a) certain existing programs, i.e., the Antibody 
Model and the Other Software and (b) other programs that MAG derives 
from such existing software or develops, acquires or obtains the right 
to sublicense during the term of this Agreement which are either:
        (i)     Changed or modified versions of the Software that 
        correct defects contained in the Software on the Effective Date 
        ("Corrected Software") or
        (ii)    Changed, modified or enhanced versions of the Software 
        (other than Corrected Software) and new software programs that are 
        applicable to the humanization of antibodies.

No software program, whether or not derived from the Software, that includes 
less than twenty-five percent (25%) of the source code of the Software in 
existence as of the Effective Date and that is not applicable to modeling the 
humanization of antibodies shall be considered to be Software for purposes of 
this Agreement.

2.      License.

2.1     License Grant.  MAG hereby grants to PDL a worldwide license 
to reproduce and use the Software within PDL (e.g., use by PDL's 
employees and consultants is within the scope of this license but PDL 
has no right to sublicense).  The foregoing license shall be for a 
perpetual term as to the Antibody Model and for the License Term as to 
the Other Software.

2.2     Exclusivity.

(a)     MAG covenants that it will not, during the License 
Term, grant any further license permitting any party other than 
PDL to use or sublicense the Software; provided, however, that 
        (i) MAG may grant a non-exclusive license permitting the internal 
        use of the Other Software (e.g., without the right to sublicense), 
        but not the Antibody Model, by E.I. duPont de Nemours & Co. and/or 
        Amgen Inc. (including any subsidiary or affiliate thereof) and 
        (ii) the foregoing restriction on MAG's rights shall end one (1) 
        year following the Effective Date.
(b)     PDL's license shall include an exclusive license (even 
as to MAG and its licensors) to use the Antibody Model to 
        (i) design antibodies, (ii) design proteins linked to antibodies, 
        or (iii) design and develop methods of joining antibodies and 
        proteins (the "Exclusive Purposes").
(c)     MAG and Levitt covenant that, MAG and Levitt will take 
reasonable steps to assure that no third party makes use of the 
Antibody Model other than an Academic Use by an Academic User.  
PDL agrees that, so long as MAG and Levitt are in compliance with 
the foregoing covenant, neither MAG nor Levitt shall have any 
liability to PDL as a result of third party uses of the Antibody 
Model not authorized by MAG or Levitt.
(d)     The restrictions on use and/or licensing of the 
Software set forth in this Paragraph 2.2 ("Exclusivity") shall in 
no way limit the right of MAG or Levitt to authorize Academic Use 
of the Software.

3.      Delivery, Acceptance and Warranty.

3.1     Delivery and Acceptance.  PDL acknowledges that MAG has 
previously delivered, or concurrently with the Effective Date will 
deliver, a master copy of the Antibody Model and Other Software.  PDL 
acknowledges that it has either inspected or waived its right to 
inspect, and hereby accepts, the Antibody Model and Other Software.

3.2     Warranty.  MAG warrants that (i) it is the sole and 
exclusive licensee of the Software and all intellectual property rights 
therein, (ii) it has the full right and power to grant to PDL the rights 
herein granted, (iii) the Software and its use by PDL within the scope 
of the licenses herein granted will not infringe any patent, copyright 
or trade secret and, to the best of MAG's knowledge, any other 
intellectual property right arising under United States law and 
(iv) neither it nor its licensors have previously granted any license 
permitting any party other than PDL to use or sublicense the Software.  
If in the future MAG becomes aware of a significant possibility that the 
Software or its use by PDL within the scope of the licenses granted 
herein might infringe any intellectual property right arising under 
United States law, MAG shall promptly so inform PDL.

3.3     WARRANTY DISCLAIMER.  EXCEPT FOR ANY EXPRESS WARRANTIES 
STATED IN THIS AGREEMENT, MAG (A) MAKES NO ADDITIONAL WARRANTIES, 
EXPRESS, IMPLIED, ARISING FROM COURSE OF DEALING OR USAGE OF TRADE, OR 
STATUTORY, AS TO ANY MATTER WHATSOEVER AND (B) DISCLAIMS ALL WARRANTIES 
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-
INFRINGEMENT OF THIRD PARTY RIGHTS.

4.      Updates and Use of PDL Computers.

4.1     Updates.  If, during the term of this Agreement, MAG shall 
develop, license or acquire any Corrected Software or New or Enhanced 
Software, MAG shall promptly provide PDL with a copy thereof. MAG also 
agrees to assist PDL, at no additional charge, in creating Corrected 
Software and New or Enhanced Software as
 reasonably requested by PDL during the term of this Agreement.  All 
Corrected Software and New or Enhanced Software shall be deemed, in 
accordance with the terms and conditions of this Agreement and without 
payment of additional consideration, to be included in the (i) Antibody 
Model if directly applicable to the modeling of antibodies and 
(ii) Other Software if not directly applicable to the modeling of anti-
bodies; provided, however, that PDL's license to all New or Enhanced 
Software shall expire at the end of the License Term for the Other 
Software.

4.2     Use of PDL Computers.  During the term of this Agreement, 
PDL shall allow Levitt to continue to use time an PDL's Silicon Graphics 
machines without charge, to the extent appropriate for additional 
software development and to the extent that such use does not interfere 
with PDL's ongoing activities.

5.      License Fee.  PDL agrees to pay MAG a license fee of [   ] within five 
(5) business days following the Effective Date and a license fee of [   ] 
dollars on fourth and each subsequent quarterly anniversary of the Effective 
Date during the License Term for the Other Software; provided, however, that 
the quarterly fee shall be reduced to [   ] following termination of this 
Agreement pursuant to Paragraph 7.2 ("Termination Without Cause") below.  PDL 
and MAG agree that [   ] shall be allocable to the Antibody Model and [   ] 
shall be applicable to each of ENCAD and MolMan (as defined in Exhibit A 
("Product Description")).

6.      Source Code.

6.1     Return of Source Code.  PDL specifically acknowledges that, 
except as set forth in this Paragraph 6 ("Source Code"), no rights are 
granted to it hereunder to the human readable source code versions of 
the Software.  PDL agrees not to disassemble, decompile, reverse 
engineer or otherwise reduce the object code versions of the Software to 
a human-perceivable form.  Within thirty (30) days of the Effective 
Date, PDL shall return to MAG all source code versions of the Software 
(other than as set forth in the following sentence) and shall certify to 
MAG in writing that it retains no such source code versions.  Within 
thirty (30) days of the Effective Date, MAG shall provide PDL with one 
(1) printed listing of the current Fortran source code of the Antibody 
Model, which PDL may consult, internally, for the sole purpose of 
diagnosing apparent conflicts between the documentation and behavior of 
the Antibody Model, and which PDL shall not otherwise reproduce or 
convert into in any other form by any electronic or other means 
(including, but not limited to, computer or information storage and 
retrieval systems) without the prior written consent of MAG; provided, 
however, that MAG hereby consents to PDL's reproduction of up to five 
(5) additional printed, non-electronic copies of the printed listing 
solely for PDL's internal use and subject to its confidentiality and 
non-disclosure requirements hereunder.

6.2     Potential Function Numbers.  MAG shall, during the License 
Term for the Other Software, provide PDL with the mathematical 
expression of potential energy functions (numerical values and relevant 
equations) that are developed, acquired or licensed by MAG or included 
in the Software, and all updates to these functions, in a timely manner.

6.3     Escrow Agreement.  PDL and MAG shall at all times during the 
License Term maintain in force an escrow agreement in substantially the 
form set forth in Exhibit C ("Escrow Agreement") with an independent 
third party escrow agent.  PDL and MAG shall promptly enter into such 
agreement with the escrow agent named in the Escrow Agreement and any 
successor escrow agent appointed pursuant to the Escrow Agreement.  PDL 
shall pay the fees and expenses of such escrow agent as required by the 
Escrow Agreement.

6.4     Escrow License.  MAG hereby grants PDL a worldwide, 
irrevocable, license, effective upon the rightful release (in accordance 
with the Escrow Agreement) to PDL of Source Code (as defined in the 
Escrow Agreement), to utilize such Source Code solely within PDL to 
(i) maintain and correct the Source Code for the Other Software and 
(ii) maintain, correct, enhance, modify and prepare derivative works 
based upon the Source Code for the Antibody Model, and to derive object 
code therefrom for use and reproduction by PDL subject to the licenses 
granted herein (which, in such event and for such purpose, shall be 
perpetual).  The foregoing license to utilize Source Code shall be 
exclusive as to the Source Code of the Antibody Model and non-exclusive 
as to the Source Code of the Other Software.

7.      Term and Termination.

7.1     Term and License Term.  The term of this Agreement and the 
License Term shall commence on the Effective Date and shall continue 
until terminated in accordance with the provisions of this Paragraph 7 
("Term and Termination").

7.2     Termination Without Cause.  PDL may terminate the term of 
this Agreement and the License Term, without cause, effective upon one 
(1) year written notice to MAG.  MAG may terminate the term of this 
Agreement, without cause, effective immediately upon written notice to 
PDL and the License Term shall continue for five (5) years following 
such notice.

7.3     Termination For Cause.  In the event of any breach of any 
term or provision under this Agreement by either party hereto, the non-
breaching party may send a written notice explaining the nature of the 
breach to the breaching party, which notice shall be delivered in 
accordance with the terms of this Agreement.  If any breach is not cured 
within thirty (30) days after the MAG of the notice of breach, the non-
breaching party may terminate this Agreement upon written notice.

7.4     Obligations Upon Termination or Expiration.  Upon the 
effective date of termination of the License Term, PDL shall deliver to 
MAG or destroy all Software, Master Copies and related materials in its 
possession furnished hereunder by MAG, together with all copies thereof, 
and shall warrant in writing within thirty (30) days of termination that 
the Software, Master Copies, related materials and all copies thereof 
have been returned to MAG-or erased or destroyed.

8.      Protection of Proprietary Rights.

8.1     Proprietary Rights.  PDL will take all reasonable measures 
to protect the proprietary rights of MAG and its licensors in the 
Software and any source code versions thereof, including all measures 
PDL employs to protects its own valuable trade secret information.  
Except as stated herein, this Agreement does not grant PDL any rights to 
patents, copyrights, trade secrets, tradenames, trademarks (whether 
registered or unregistered) or any other rights, franchises or licenses 
in respect of the Software.

8.2     Non-Disclosure.
(a)     Obligations.  PDL expressly undertakes to retain in 
confidence all confidential information, designated as such in 
accordance with the terms of subparagraph (b) below, transmitted 
to it hereunder by MAG, and agrees to make no use of such 
confidential information except under the terms of this Agreement.  
During the term of this Agreement, PDL shall be exposed to certain 
information concerning MAG's Software and proposed new Software 
which are the confidential and proprietary information of MAG and 
not generally known to the public.  PDL agrees that during and 
after the term of this Agreement, it will not use or disclose to 
any third party any confidential information without the prior 
written consent of MAG. MAG hereby consents to the disclosure of 
its confidential information to certain employees of PDL who agree 
to keep MAG's confidential information in confidence, in order to 
allow PDL to perform under this Agreement and to obtain the 
benefits hereof. MAG further agrees that PDL shall be permitted to 
demonstrate the object code version of the Software to third 
parties in connection with PDL's business discussions with such 
third parties.  This subparagraph (a) shall not apply to 
information after such information is made public by MAG.
(b)     Designation of Confidential Information.  MAG 
confidential information shall consist of (i) all information in 
written form that is marked "Confidential" or similarly marked by 
MAG before being furnished to PDL and (ii) the source code of the 
Software.  AU oral disclosures of confidential information shall 
be identified as such prior to disclosure and summarized, in 
writing, by MAG and said summary shall be given to PDL within 
thirty (30) days of the subject oral disclosure.
(c)     Exception.  PDL shall not be liable for disclosure or 
use of any data or information which (i) was in the public domain 
at the time it was disclosed or falls within the public domain, 
except through the fault of PDL; (ii) was known to PDL at the time 
of disclosure, which knowledge PDL shall have the burden of 
establishing by clear and convincing evidence; (iii) was disclosed 
after written approval of MAG; (iv) becomes known to PDL from a 
source other than MAG without breach of this Agreement by PDL; 
(iv) is disclosed pursuant to the order of a court or other 
governmental authority having jurisdiction over PDL (provided, 
however, that PDL shall promptly notify MAG and cooperate with MAG 
in limiting disclosure to the extent legally permissible and/or 
seeking an appropriate protective order from such authority); or 
(v) was independently developed by PDL without the benefit of 
confidential information received from MAG, which independent 
development the receiving party shall have the burden of 
establishing by clear and convincing evidence.

8.3     Proprietary Legends.  PDL will retain in and on all copies 
of the Software all copyright notices and proprietary data legends 
contained therein or thereon at the time of delivery to PDL or as 
otherwise reasonably requested by MAG and will affix all such legends to 
any copies of the Software made by PDL.

8.4     Continuing Covenant.  Each party covenants that, during and 
in the course of its performance hereunder, it will not communicate to 
the other party any confidential or proprietary information which, to 
the best of the communicating party's knowledge is communicated in 
violation of the communicating party's obligations to the owner thereof.

9.      EXCLUSION OF CERTAIN DAMAGES.  EXCEPT FOR DAMAGES ARISING FROM A 
BREACH OF THE OBLIGATIONS SET FORTH IN PARAGRAPH 8 ("PROTECTION OF PROPRIETARY 
RIGHTS") ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY OR ANY THIRD 
PARTY FOR ANY INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR 
REVENUE, OR INTERRUPTION OF BUSINESS IN ANY WAY ARISING OUT OF OR RELATED TO 
THIS AGREEMENT, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT 
(INCLUDING NEGLIGENCE AND STRICT PRODUCT LIABILITY BUT EXCLUDING INTENTIONAL 
TORT) OR OTHERWISE, EVEN IF ANY REPRESENTATIVE OF THE PARTY HAS BEEN ADVISED 
OF THE POSSIBILITY OF SUCH DAMAGES.  IN THE CASE OF SUCH DAMAGES ARISING FROM 
A BREACH OF THE OBLIGATIONS SET FORTH IN PARAGRAPH 8 ("PROTECTION OF 
PROPRIETARY RIGHTS") ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER PARTY 
OR ANY THIRD PARTY FOR INCIDENTAL SPECIAL OR CONSEQUENTIAL DAMAGES, LOSS OF 
PROFITS OR REVENUE, OR INTERRUPTION OF BUSINESS IN ANY WAY ARISING OUT OF OR 
RELATED TO THIS AGREEMENT, REGARDLESS OF THE FORM OF ACTION WHICH, IN 
AGGREGATE, EXCEED TWO HUNDRED THOUSAND DOLLARS ($200,000).

10.     Miscellaneous.

10.1    Notices.  Any notice or reports required or permitted to be 
given under this Agreement shall be given in writing and shall be 
delivered by personal delivery, telegram, telex, telecopier, facsimile 
transmission or by certified or registered mail, postage prepaid, return 
receipt requested, and shall be deemed given upon personal delivery, 
five (5) days after deposit in the mail or upon acknowledgment of 
receipt of electronic transmission.  Notices shall be sent to the 
signatory of this Agreement at the address set forth at the beginning of 
this Agreement or such other address as either party may specify in 
writing.

10.2    Survival of Obligations.  PDL agrees that its obligations 
under Paragraph 8 ("Protection of Proprietary Rights") shall survive any 
expiration or termination of this Agreement.

10.3    Severability.  The provisions of this Agreement are 
severable and if any one or more such provisions shall be determined to 
be invalid, illegal or unenforceable, in whole or in part, the validity, 
legality and enforceability of any of the remaining provisions or 
portions thereof shall not in any way be affected or impaired thereby 
and shall nevertheless be binding between the parties hereto.  Any such 
invalid, illegal or unenforceable provision or portion thereof shall be 
changed and interpreted so as to best accomplish the objectives of such 
provision or portion thereof within the limits of applicable law or 
applicable court decisions.

10.4    Governing Law.  This Agreement shall be construed in 
accordance with and all disputes hereunder shall be governed by the laws 
of the State of California as applied to transactions taking place 
wholly within California between California residents.

10.5    Attorneys' Fees.  In any action to interpret or enforce this 
Agreement, the prevailing party shall be awarded all court costs and 
reasonable attorneys' fees incurred.

10.6    Assignment.  Neither party shall directly or indirectly 
sell, transfer, assign, convey, pledge, encumber or otherwise dispose of 
this Agreement without the prior written consent of the other party.  
Notwithstanding the foregoing, either party may, without the prior 
consent of the other party, assign or transfer this Agreement as part of 
a corporate reorganization, consolidation, merger or sale of 
substantially an assets provided said entity assumes all of such party's 
obligations hereunder.

10.7    Relationship of the Parties.  Nothing contained in this 
Agreement shall be construed as creating any agency, partnership, or 
other form of joint enterprise between the parties.  The relationship 
between the parties shall at all times be that of independent 
contractors.  Neither party shall have authority to contract for or bind 
the other in any manner whatsoever.  This Agreement confers no rights 
upon either party except those expressly granted herein.

10.8    Counterparts.  This Agreement may be executed in two or more 
counterparts, each of which shall be deemed an original, but all of 
which together shall constitute one and the same instrument.

10.9    Entire Agreement.  This Agreement is the complete, entire, 
final and exclusive statement of the terms and conditions of the 
agreement between the parties.  This Agreement supersedes, and the terms 
of this Agreement govern, (i) any prior or collateral agreements between 
the parties with respect to the subject matter hereof (including that 
certain letter agreement between PDL and Levitt dated as of June 28, 
1988) and (ii) that certain Letter of Intent between PDL and Levitt 
dated as of May 30, 1990.  The parties acknowledge and agree that 
Levitt, in his capacity as a natural person, serves as a consultant to 
PDL pursuant to that certain Consulting Agreement dated as of October 1, 
1987 and amended as of January 1, 1990 ("Consulting Agreement") and 
agree that this Agreement shall not apply to, and the Consulting 
Agreement shall govern, all matters arising between PDL and Levitt in 
connection with Levitt's services as a consultant to PDL This Agreement 
may not be modified except in a writing executed by duly authorized 
representatives of the parties.

10.10   Levitt as Limited Party.  Levitt shall use his best efforts 
to insure that if he develops any software programs during the term of 
this Agreement ("Programs") which, had such Programs been developed by 
MAG, would constitute Software hereunder, that such Programs are 
licensed or assigned either to (i) PDL on terms providing PDL with 
rights substantially equivalent to its rights to Software hereunder or 
(ii) MAG so that MAG obtains the right to sublicense such Programs to 
PDL as Software.  PDL, Levitt and MAG agree that Levitt (in his capacity 
as a natural person) is a direct party to this Agreement solely to 
undertake the obligations and be subject to the provisions set forth in 
Paragraph 10 ("Miscellaneous") and subparagraph (c) of Paragraph 2.2 
("Exclusivity") and shall have no other obligations or liability under 
this Agreement.
IN WITNESS WHEREOF, the parties have caused this Agreement to be 
executed by their duly authorized representatives as of the Effective Date.


MAG:  Molecular Applications Group


By: /s/ Michael Levitt  
      Michael Levitt, President

PDL:  Protein Design Labs, Inc.


By: /s/ Lawrence Jay Korn       
      Laurence Jay Korn, President


      /s/ Michael Levitt        
Michael Levitt


                                   EXHIBIT A

                              Product Description

Part I:  Antibody Model

The Antibody Model (ABMOD) is a computer software program that builds a 
model of an antibody Fv domain from the three-dimensional structure of other Fv 
domains.

Part II:  Other Software

ENCAD (Energy Calculation and Dynamics) program, a program which 
calculates the potential energy of any system of organic molecules, especially 
protein macromolecules, for energy minimization and molecular dynamics 
simulation.

MolMan (Molecular Manager) program, a program which allows molecular 
structure to be displayed and modeled on the Silicon Graphics Iris series 
workstations, with emphasis on space-filling representations, real-time 
frequency filtering of trajectories and mouse-driven interface.


CONFIDENTIAL TREATMENT REQUESTED

                                EXHIBIT B

                            Academic License

In return for the rights granted below, you agree as follows:

Scope.  Molecular Applications Group ("MAG") grants to you the 
nonexclusive right to use the accompanying software and documentation 
("Product") for academic, noncommercial purposes and to make such software 
resident on a single computer.  This License does not grant you any 
intellectual property rights or other rights in the Product other than as 
expressly listed herein.  Without limitation, you may not (i) use the Product 
in a network, (ii) rent or lease the Product or (iii) license or convey to any 
third party any rights related to the commercial exploitation of humanized 
antibodies designed or developed with the Product.

Proprietary Rights and Obligations.  The Product, including its 
structure, sequence and organization, is the valuable property of MAG and its 
Licensors.  You may not make, have made, or permit to be made, any copies of 
the Product or any portion thereof, except that you may make one copy of the 
Product solely for backup purposes which shall contain the same proprietary 
notices which appear on or in the Product. MAG and its licensors retain title 
and ownership of the Product recorded on the original media and all subsequent 
copies of the Product, regardless of the form or media in or on which the 
original and other copies may exist.  You may not modify, adapt, translate, 
reverse engineer, decompile, disassemble or create derivative works based on 
the Product.

No Assignment.  You may not assign or transfer your rights under this 
License to any third party.

Term.  This License shall terminate immediately if you breach any 
provision hereof and, otherwise, in the year [   ].  Upon termination, you 
will destroy the Product and all copies or modifications in any form.

Export.  The Product may include commodities and technical data of 
United States origin whose export or re-export is restricted by U.S. law.  You 
agree not to export or reexport the Product, or any portion thereof in any 
form without all required U.S. and foreign licenses.  Your obligations 
pursuant to this paragraph shall survive and continue after any termination or 
expiration of this License.

NO WARRANTY.  The Product is provided  "as is" without warranty of any 
kind, either express or implied, including but not limited to the warranties 
of non-infringement of  third party rights, merchantability or fitness for a 
particular purpose.  MAG does not warrant that the Product will meet your 
requirements or will operate uninterruptedly or without error.  The entire 
risk as to the quality and performance of the Product is with you.  Should the 
Product prove defective, you assume the entire cost of repair and correction.  
Some states do not allow the exclusion of implied warranties, limits on the 
duration of implied warranties, or exclusion or limitation of incidental or 
consequential damages, so the limitations or exclusions contained herein may 
not apply to you.  This License gives you specific legal rights and you may 
also have other rights which vary from state to state.

Limit of Liability.  In no event will MAG be liable to you for any 
consequential or incidental damages, including lost profits or lost savings, 
or for any claim by another party, even if an MAG representative has been 
advised of the possibility of such damages or claim.

Third Party Beneficiary.  You acknowledge that certain commercial rights 
with respect to the Product have been licensed to Protein Design Labs, Inc., a 
Delaware corporation located at 2375 Garcia Avenue, Mountain View, California 
who is an intended third party beneficiary of, and entitled to enforce, this 
License.

Entire Agreement.  You have read and understand this License.  It is the 
complete and exclusive statement of the agreement between MAG and you and 
supersedes any prior agreement, oral or written, and any other communications 
between MAG and you relating to the subject matter hereof.  Your obligations 
hereunder shall inure to the benefit of MAG's licensors whose rights are 
licensed hereby.  No variation of the terms of this License or any different 
terms will be enforceable against MAG unless MAG gives its express signed 
written consent including an express waiver of the terms hereof.  This License 
is governed by the laws of the State of California, without regard to 
California's law regarding conflicts of law.

IN WITNESS WHEREOF, the undersigned student or professional colleague of 
Dr. Michael Levitt has signed his or her name below.

Signature



Printed Name



Date

                                 EXHIBIT C

                              ESCROW AGREEMENT


THIS AGREEMENT ("Escrow Agreement") is executed as of this 12th day of 
December, 1990 by and among Protein Design Labs, Inc. ("Licensee"), a Delaware 
corporation having a place of business at 2375 Garcia Avenue, Mountain View, 
California 94043, and Molecular Applications Group, a California business at 
880 Lathrop, Stanford, California 94305 ("Licensor") and Townsend & Townsend, 
a California partnership having a place of business at 379 Lytton Avenue, Palo 
Alto, California 94303 ("Escrow Agent").
RECITALS

A.      Licensor and Licensee have entered into a Software License 
Agreement (the "Agreement") dated as of September 1, 1990 pursuant to which 
Licensor has granted to Licensee certain rights with respect to object code 
versions of certain of Licensor's computer software programs ("Software").
B.      Maintenance and support of such programs are critical to Licensee 
in the conduct of its business;
C.      The Agreement requires Licensor and Licensee to enter into an 
Escrow Agreement with Escrow Agent in the form hereof.
D.      The purpose of this Agreement is to provide for Licensor's 
periodic deposit of certain source code for Software with Escrow Agent and, 
under certain circumstances specified below, to permit Licensee to obtain the 
escrowed Source Code from the Escrow Agent solely for the purposes set forth 
herein;
E.      Escrow Agent is a law firm which serves as Licensee's patent 
counsel.  Escrow Agent does not generally serve in the capacity of an escrow 
agent but is MAG to do so, on the terms set forth herein, as an accommodation 
to Licensee.

NOW, THEREFORE, in consideration of the promises and mutual covenants 
contained herein, and for other good and valuable consideration, receipt of 
which is hereby acknowledged, the parties agree as follows:

1.      DEPOSIT OF DOCUMENTATION.
(a)     The term "Source Code" as used in this Escrow Agreement 
means the human and/or machine readable versions (on disk or magnetic tape 
media) as applicable of the materials utilized or generated by Licensor 
internally in the course of creating Software and all associated internal 
documentation including computer source instructions for Software, a list of 
the names of the modules included, instructions for building object code 
versions of Software from Source Code, command files used in constructing such 
object code, object code files as built by Licensor from Source Code, any 
other ancillary files and listings created in the course of building such 
object code files and any additional tools and subroutines required to build 
Software that are not generally commercially available.
(b)     Licensor agrees to deposit with Escrow Agent, (i) January 
15, 1991 (the foregoing, and all other capitalized terms used and not defined 
herein, being ascribed the meanings set forth in the Agreement) the Source 
Code thereof and (ii) semi-annually, or as otherwise reasonably requested by 
Licensee, the then current Source Code of the Software and updates and 
corrections thereto delivered or required to be delivered under the Agreement.  
Such deposit shall consist of a sealed package certified by Licensee to 
contain a complete set of such Source Code as defined in Paragraph l(a) above.
(c)     The term "Deposit" as used in this Escrow Agreement means 
the Source Code deposited with Escrow Agent by Licensor pursuant to this 
Escrow Agreement.

2.      REVISIONS AND MAINTENANCE.  Escrow Agent shall acknowledge receipt 
of all Deposits by sending written acknowledgment thereof to both Licensor and 
Licensee.

3.      STORAGE AND SECURITY.
(a)     Escrow Agent shall act as custodian of the Deposit until the 
escrow is terminated pursuant to Paragraph 11 ("Termination") of this Escrow 
Agreement.  Escrow Agent shall maintain the Deposit in the same manner as it 
would maintain a confidential client file in accordance with Escrow Agent's 
usual business practices.
(b)     The Deposit shall remain the exclusive property of the 
Licensor, subject only to the licenses provided in this Escrow Agreement.
(c)     Escrow Agent shall not divulge, disclose or otherwise make 
available the Deposit to any parties other than those persons duly authorized 
in writing by a competent officer of Licensor, except as provided in this 
Escrow Agreement.
(d)     Escrow Agent shall not permit any person access to the 
Deposit except as may be necessary for Escrow Agent's authorized 
representatives to perform under this Escrow Agreement.
(e)     Access to the Deposit shall not be granted without 
compliance with any security and identification procedures instituted by 
Escrow Agent.
(f)     Escrow Agent shall have no obligation or responsibility to 
verify or determine that the Deposit does, in fact, consist of those items 
which Licensor is obligated to deliver, under any agreement, and Escrow Agent 
shall bear no responsibility whatsoever to determine the existence, relevance, 
completeness, currency, or accuracy of the Deposit.
(g)     Escrow Agent's sole responsibility shall be to accept, store 
and deliver the Deposit, in accordance with the terms and conditions of this 
Escrow Agreement.
(h)     If any of the Deposit shall be attached, garnished or levied 
upon pursuant to an order of court, or the delivery thereof shall be stayed or 
enjoined by an order of court, or any other order, judgment or decree shall be 
made or entered by any court affecting the Deposit or any part thereof, Escrow 
Agent is hereby expressly authorized in its sole discretion to obey and comply 
with all orders, judgments or decrees so entered or issued by any court, 
without the necessity of inquiring whether such court had jurisdiction, and in 
case Escrow Agent obeys or complied with any such order, judgment or decree, 
Escrow Agent shall not be liable to any Licensee of Record, Licensor or any 
third party by reason of such compliance, notwithstanding that such order, 
judgment or decree may subsequently be reversed, modified or vacated.

4.      RELEASE OF DEPOSIT.
(a)     Upon the occurrence of any Event of Default (as defined in 
Paragraph 7 ("Events of Default")), Licensee may deliver to Escrow Agent a 
written notice of such Event of Default (a "Notice").  Escrow Agent shall, 
within five (5) business days of receipt thereof, send a copy of such Notice 
to Licensor.  Unless Licensor shall have provided Contrary Instructions (as 
defined below) to Escrow Agent within twenty (20) business days after Escrow 
Agent has sent a copy of such Notice to Licensor, the Deposit shall be 
delivered to Licensee by Escrow Agent within the next five (5) business days 
following the end of such twenty (20) day period.
(b)     "Contrary Instructions" for the purposes of this Escrow 
Agreement means a notarized affidavit executed by an official of Licensor 
stating that the Event or Events of Default specified in Licensee's Notice 
have not occurred, or have been timely cured.
(c)     Upon timely receipt of such Contrary Instructions, Escrow 
Agent shall not release the Deposit, but (except pursuant to subparagraph (c) 
of Paragraph 11 ("Termination") below) shall continue to store the Deposit 
until otherwise directed by Licensee and Licensor jointly, or until resolution 
of the dispute pursuant to Paragraph 5 ("Dispute Resolution") of this Escrow 
Agreement, or by a court of competent jurisdiction.
(d)     Notwithstanding any Deposit release hereunder, the 
obligations of Licensor to continue making Deposits and the obligations of 
Escrow Agent to receive and maintain such Deposits shall continue throughout 
the term of this Escrow Agreement.

5.      DISPUTE RESOLUTION.  Licensor and Licensee agree that if Contrary 
Instructions are timely given by Licensor pursuant to Paragraph 4 ("Release of 
Deposit") hereof, then Licensor and Licensee shall submit their dispute 
regarding Licensee's Notice to arbitration by a single arbitrator appointed by 
the American Arbitration Association ("Association") in accordance with the 
Association's commercial arbitration rules then in effect (as expressly 
modified by this paragraph).  The arbitration shall take place in the County 
of Santa Clara, State of California.  The decision of the arbitrator shall be 
final and binding upon the parties and enforceable in any court of competent 
jurisdiction, and a copy of such decision shall be delivered immediately to 
Licensor, Licensee and Escrow Agent.  The parties shall use their best efforts 
to commence the arbitration proceeding within twenty (20) business days 
following delivery of the Contrary Instructions.  The sole question to be 
determined by the arbitration panel shall be whether or not there existed an 
Event of Default at the time Licensee delivered the Notice under Paragraph 4 
("Release of Deposit"), and, if so, whether such Event of Default was timely 
cured.  If the arbitration panel finds that there has been an Event of Default 
not timely cured, Escrow Agent shall promptly deliver the Deposit to Licensee.  
Depositions may be taken and discovery obtained in any such arbitration 
proceedings as provided in Sections 1283.05 and 1283.1 of the Code of Civil 
Procedure of the State of California.  All fees and charges by the American 
Arbitration Association and the reasonable attorneys' fees and costs incurred 
by the prevailing party in the arbitration shall be paid by the non-prevailing 
party.  Judgment upon the award rendered by the arbitrator may be entered into 
any court having jurisdiction thereof.  Notwithstanding the foregoing, either 
party shall have the right to obtain a preliminary judgment on any equitable 
claim in any court of competent jurisdiction, where such judgment is necessary 
to preserve property or proprietary rights under this Escrow Agreement.  Such 
judgment shall remain effective as long as the terms of the judgment so 
provide or until specifically superseded by the action of the arbitration 
panel as provided above.

6.      BANKRUPTCY.  Licensor and Licensee acknowledge that this Escrow 
Agreement is an "agreement supplementary to" the Agreement as provided in 
Section 365(n) of Title 11, United States Code (the "Bankruptcy Code").  
Licensor acknowledges that if Licensor as a debtor in possession or a trustee 
in bankruptcy in a case under the Bankruptcy Code rejects the Agreement or 
this Escrow Agreement, Licensee may elect to retain its rights under the 
Agreement and this Escrow Agreement as provided in Section 365(n) of the 
Bankruptcy Code.  Upon written request of the Licensee to Licensor or the 
Bankruptcy Trustee, Licensor or such Bankruptcy Trustee shall not interfere 
with the rights of licensee as provided in the Agreement and this Escrow 
Agreement, including the right to obtain the Deposit from Escrow Agent.

7.      EVENTS OF DEFAULT.  The occurrence of any of the following shall 
constitute an "Event of Default" for purposes of this Escrow Agreement.
(a)     Licensor applies for or consents to the appointment of a 
trustee, receiver or other custodian or makes a general assignment for the 
benefit of its creditors,
(b)     Any bankruptcy, reorganization, debt arrangement, or other 
case or proceeding under any bankruptcy or insolvency law, or any dissolution 
or liquidation proceedings are commenced by or against Licensor and, as to 
such case or proceeding not commenced by Licensor, is acquiesced in or remains 
undismissed for sixty (60) days.
(c)     Licensor fails to cure a material breach of its obligations 
under Paragraphs 4.1 ("Updates") or 6.2 ("Potential Function Numbers") of the 
Agreement within thirty (30) days of written notice thereof from Licensee.
(d)     The death or disability of Michael Levitt, the president and 
sole shareholder of Licensor, prevents Licensor's continued compliance with 
its obligations pursuant to the paragraphs of the Agreement referred to in 
clause (c) above.

8.      INDEMNIFICATION.  Licensor and Licensee jointly and severally 
agree to defend and indemnify Escrow Agent and to hold Escrow Agent harmless 
from and against any and all claims, actions and suits, whether groundless or 
otherwise, and from and against any and all liabilities, losses, damages, 
costs, charges, penalties, counsel fees, and any other expense of any other 
nature, including, without limitation, settlement costs incurred by Escrow 
Agent on account of any act or omission of Escrow Agent, in respect of or with 
regard to this Escrow Agreement, except insofar as such liabilities arise by 
reason of Escrow Agent's willful misconduct.

9.      LICENSE GRANT FOR USE OF SOURCE CODE, CONFIDENTIALITY.
(a)     Licensee's license described in Paragraph 6.4 ("Escrow 
License") of the Agreement shall be effective upon the rightful release (in 
accordance herewith) to Licensee of Source Code. 
(b)     Licensee acknowledges and agrees that use of the Source Code 
is furnished to Licensee on a confidential and secret basis for the sole and 
exclusive use of Licensee, and not for sale, sublicense or disclosure to third 
parties.  In the event that Licensee obtains the Source Code pursuant to the 
terms hereof, Licensee agrees to treat the Source Code as Licensee 
confidential information governed by Paragraph 8.2 ("NonDisclosure") of the 
Agreement.

10.     RECORDS.  Escrow Agent agrees to keep complete written records of 
the activities undertaken and materials prepared and delivered to Escrow Agent 
pursuant to this Escrow Agreement.  Licensor and Licensee shall be entitled at 
reasonable times during normal business hours and upon reasonable notice to 
Escrow Agent during the term of this Escrow Agreement to inspect the records 
of Escrow Agent with respect to the Source Code.  Licensor shall be entitled 
upon reasonable notice to Escrow Agent and during normal business hours to 
inspect the facilities of Escrow Agent with respect to the physical status and 
condition of the Source Code.

11.     TERMINATION.
(a)     This Escrow Agreement shall continue indefinitely until 
terminated as set forth below or by operation of law.  Upon such termination, 
except for termination as a result of rejection of the Agreement in a 
bankruptcy case of Licensor, Escrow Agent shall return the Deposit to Licensor 
after the payment of all costs, fees and expenses due Escrow Agent.
(b)     Licensee may unilaterally terminate this Escrow Agreement 
upon sixty (60) days written notice to Escrow Agent.
(c)     Escrow Agent reserves the right to resign as Escrow Agent 
either upon sixty (60) days prior written notice to Licensor and Licensee or 
(ii) upon ten (10) days prior written notice to Licensor and Licensee in the 
event that (x) Escrow Agent has received Contrary Instructions from Licensor 
and (y) Escrow Agent has turned the Deposit over to National Safe Depository 
(located at 3585 Stevens Creek Boulevard, San Jose, California 95117) or such 
other successor escrow agent as is acceptable to Licensor and Licensee.  No 
entity shall be qualified to be a successor escrow agent unless such entity is 
willing and able, not later than the transfer of the Deposit to such successor 
escrow agent, to enter into a written escrow agreement with Licensor and 
Licensee containing provisions substantially equivalent to those hereof; 
provided, however, that such successor agreement may, in lieu of subparagraph 
(a) of Paragraph 13 ("Fees") hereof, provide for Licensor and Licensee to 
jointly bear such successor escrow agent's usual and reasonable fees for 
escrow services.  When Escrow Agent has transferred the Deposit to such 
successor escrow agent, Escrow Agent shall have no further obligations 
hereunder but shall remain entitled to receive payment of any unpaid fees and 
costs pursuant to Paragraph 13 ("Fees") of this Escrow Agreement.
(d)     In the event that the applicable notice period in 
Paragraph 11(c) elapses without Escrow Agent having received payment from 
either Licensor or Licensee of the remaining fees due, Escrow Agent shall then 
have the option, without further notice to either party, to terminate the 
Escrow Agreement and to destroy the Deposit.

12.     GOOD FAITH RELIANCE.  Escrow Agent may rely and act upon any 
instruction, instrument, or signature believed in good faith to be genuine, 
and may assume that any person purporting to give any writing, notice, 
respect, advice, or instruction in connection with or relating to this Escrow 
Agreement has been duly authorized to do so.

13.     FEES.
(a)     Escrow Agent agrees to perform its normal services hereunder 
without fee; provided, however, that if Escrow Agent is required to perform 
any additional or extraordinary services as a result of being Escrow Agent, 
including intervention in any litigation or proceeding, Licensor and Licensee 
shall be jointly and severally obligated to pay Escrow Agent reasonable 
compensation for such services and to reimburse Escrow Agent for such costs 
incurred, including reasonable attorney's fees.
(b)     Escrow Agent shall be entitled to receive payment of all 
costs, fees and expenses due it, prior to release of the Deposit.

14.     ENTIRE AGREEMENT.  This Escrow Agreement and the Agreement, 
including the Exhibits hereto, constitutes the entire agreement among the 
parties regarding the subject matter hereof, and shall supersede all previous 
and contemporaneous communications, representations, understandings and 
agreement, either oral or written between the parties.

15.     NOTICE.  All notices required or permitted by this Escrow 
Agreement shall be sufficiently served by mailing the same by certified or 
registered mail, return receipt requested, to the parties at their respective 
addresses, as follows:
(a)     Escrow Agent: 

Townsend & Townsend
Attention:  George M. Schwab, Esq., Managing 
Partner
379 Lytton Avenue
Palo Alto, California 94303

(b)     Licensor:
        Molecular Applications Group
        c/o Michael Levitt, President 
        880 Lathrop
        Stanford, California 94305

(c)     Licensee:
        Protein Design Labs, Inc.
        2375 Garcia Avenue
        Mountain View, California 94043
Attention: President

16.     COUNTERPARTS.  This Escrow Agreement may be executed in one or 
more counterparts, each of which shall be deemed an original, and all of which 
taken together shall constitute one and the same instrument.

17.     GOVERNING LAW.  This Escrow Agreement shall be governed by and 
construed according to the internal laws of the State of California without 
application of the principles of choice of law or conflict of laws.

18.     SEVERABILITY.  In the event any of the provisions of this Escrow 
Agreement shall be held by a court of competent jurisdiction to be contrary to 
any state or federal law, the remaining provisions of this Escrow Agreement 
will remain in full force and effect.

19.     HEADINGS.  The section headings in this Escrow Agreement do not 
form a part of it, but are for convenience only and shall not limit or affect 
the meaning of the provisions.

IN WITNESS WHEREOF, the parties have executed this Escrow Agreement on 
the date first above written.


LICENSOR:

Molecular Applications Group


By:             
      Michael Levitt, President

PDL:

Protein Design Labs, Inc.


By: /s/ Laurence Jay Korn
    ------------------------
      Laurence Jay Korn, President


ESCROW AGENT:

Townsend & Townsend


By:             
      George M. Schwab, Esq.
       Managing Partner


 

EXHIBIT 10.15

CONFIDENTIAL TREATMENT REQUESTED

                    DEVELOPMENT AND LICENSE AGREEMENT
                         FOR HUMANISED [   ]

between
PROTEIN DESIGN LABS, INC.
and
SANDOZ PHARMA LTD.

CONFIDENTIAL TREATMENT REQUESTED

                   DEVELOPMENT AND LICENSE AGREEMENT

This Agreement effective as of December 1, 1990 between PROTEIN DESIGN 
LABS, INC., a Delaware corporation having offices at 2375 Garcia Avenue, 
Mountain View, CA  94043, USA (hereinafter "PDL") and SANDOZ PHARMA LTD, a 
Swiss corporation having offices at CH-4002, Basle, Switzerland (hereinafter 
"SANDOZ").

WHEREAS, SANDOZ has been granted exclusive worldwide license by [   ] 
USA (hereinafter [   ] ) to make, have made, use or sell a proprietary murine 
monoclonal antibody referred to under the SANDOZ internal code as [   ] 
(hereinafter[   ] ) or derivatives thereof, including any humanized derivative 
thereof (hereinafter "Humanized [   ] Antibody").

WHEREAS, SANDOZ wishes to engage PDL to develop a Humanized [   ] 
Antibody; and

WHEREAS, PDL is willing to undertake such development effort and to 
grant to SANDOZ an exclusive worldwide license to such Humanized [   ] 
Antibody.

NOW THEREFORE, in consideration of the mutual covenants herein contained 
and intending to be legally bound, the parties agree as follows:

ARTICLE 1

DEFINITIONS

The following terms, as used herein, shall have the following meanings:

1.01    "Affiliate," with respect to a party hereto, shall mean a 
corporate or other entity which, directly or indirectly, controls, is 
controlled by, or is under common control with such party; "control" shall 
mean the ownership of not less than 50% of the voting shares of the 
corporation, or decision-making authority as to an unincorporated entity; and 
any corporations in which the maximum amount of stock permitted by law to be 
held by another entity is beneficially owned by SANDOZ shall also be 
considered as Affiliates of SANDOZ.

1.02    "Calendar Half Year" shall mean each six month period, or any 
portion thereof, ending June 30 and December 31 during the Term of this 
Agreement.  "Interim Calendar quarter" shall mean each three month period, or 
any portion thereof ending on March 31, and September 30, during the Term of 
this Agreement.

1.03    "Hybridoma Cell Line" shall mean a hybridoma cell line producing [   
] in sufficient quantity to enable PDL to undertake its duties and obligations 
under this Agreement.

1.04    "Licensed Products" shall mean products, for any use, 
incorporating all or at least one variable region of one or more [   ] 
Antibodies (as defined in Article 2.3 hereinafter) or Humanized [   ] 
Antibodies developed by PDL in pursuance of this Agreement.

1.05    "Net Sales Value" shall mean the aggregate gross revenues whether 
in cash or in kind derived by or payable from or on account of the sale of 
Licensed Products, less an allowance of [   ] to cover factors such as 
(a) credits or allowances, if any, actually granted on account of price 
adjustments, recalls, rejection or return of items previously sold, (b) excise 
and sales taxes, duties or other taxes imposed on and paid with respect to 
such sales (excluding income or franchise taxes of any kind) and (c) freight 
and freight insurance costs.

1.06    "Technical Information" shall mean confidential proprietary 
technical information, know-how and materials owned by [   ], SANDOZ or PDL on 
the date hereof, or hereinafter developed by SANDOZ, [   ] or PDL in 
connection with this license and relating to the Hybridoma Cell Line, [  ]
or Humanized [   ] Antibody(ies) or their manufacture or use for any 
purpose.

ARTICLE 2

DEVELOPMENT PROGRAM

2.01    Immediately upon execution of this Agreement, SANDOZ shall provide 
to PDL a sufficient quantity of a Hybridoma Cell Line together with any 
Technical Information which in the judgment of SANDOZ and PDL would be useful 
in assisting PDL to accomplish the objectives of this Agreement and which 
SANDOZ is legally free to disclose.  PDL specifically acknowledges and accepts 
that the Hybridoma Cell Line and any [   ] Technical Information transferred 
are the sole property of [   ] and that, while [   ] has agreed to such 
transfer, it has done so solely for the purposes of accomplishing the 
objectives of this Agreement.  Upon completion of the development work 
contemplated under this Agreement or termination of this Agreement, whichever 
is earlier, any and all quantities of the Hybridoma Cell Line in the 
possession of PDL shall immediately be returned to SANDOZ.  In addition, PDL 
shall clearly identify in its records that any Hybridoma Cell Line provided 
hereunder is the property of [   ] and is to be returned to SANDOZ.

2.02    Upon receipt of the Hybridoma Cell Line, PDL shall immediately 
commence and diligently pursue on a best efforts basis a development program 
(hereinafter "Program") to apply its proprietary humanization technology with 
the objective of producing a Humanized [   ] Antibody having substantially 
equivalent therapeutic properties but presumably having, inter alia, reduced 
immunogenicity and/or an increased half-life.  SANDOZ will, primarily through 
its Affiliates Sandoz Research Institute, Vienna, Austria (hereinafter "SFI"), 
cooperate in those efforts and in particular will be responsible for 
pharmacological and other evaluation of antibodies developed by PDL as 
contemplated under the Program.

2.03    The Program will be sub-divided into four Phases as follows:

        Phase A. [   ] Antibody Production.  In the first Phase of the 
Program, PDL will prepare and provide to SFI sufficient quantities (with > 90% 
purity and having an endotoxin level < 50 units/mg) of two [   ] antibodies, 
one of IgG1 and the other of IgG3 isotype (herein "[   ] Antibodies"), for 
evaluation.  A quantity of from 1 to 10 mg of each antibody may be required by 
SFI.  PDL will also disclose to SFI the determined sequence of [   ].

        Phase B.  Evaluation of [   ] Antibodies.  In this second Phase of 
the Program, SFI will evaluate the two [   ] antibodies provided by PDL to 
determine which, if any, of the two isotypes it wishes PDL to pursue in the 
following Phases of the Program.  SFI will promptly advise PDL to its decision 
in this respect.
In parallel, PDL will during this Phase, commence and pursue the 
molecular modeling activities believed by PDL to be necessary for successful 
completion of the remaining Phases of the Program.  It shall not however 
embark on Phase C of the Program until receiving SFI's decision referred to 
above.

        Phase C.  Humanized [   ] Antibody Production and Evaluation.  In 
this third phase of the Program, and following the SFI decision referred to 
under Phase B, PDL will carry out the necessary further program to produce a 
Humanized [   ] Antibody having a tumor binding affinity constant not more 
than [   ] times lower than that of [   ] (hereinafter the "Desired Binding 
Affinity") and will supply SFI with a sufficient quantity (with > 90% purity 
and having an endotoxin level < 50 units/mg) of that antibody for evaluation.  
SFI shall promptly conduct such evaluation using, if technically possible, the 
method of competitive binding set forth in Queen, et al., Proceedings of the 
National Academy of Science, USA, 86,1030 (1989).  If it is not technically 
possible to use the method set forth in Queen, et al., the parties shall 
consult in good faith to agree upon a mutually acceptable alternative method.  
The results of such tests shall be promptly communicated to PDL and all 
written results will be provided to PDL as soon as practicable.  In the event 
that the supplied antibody does not meet the Desired Binding Affinity and is 
in the SFI's view not sufficiently close thereto, SFI shall inform PDL 
accordingly.  PDL shall then have the obligation to produce one further 
Humanized [   ] Antibody which it hopes does meet the Desired Binding Affinity 
and shall supply SFI with sufficient quantity of that antibody for evaluation 
as set forth above.  The quantity of each antibody required by SFI for 
evaluation under this Phase C may be approximately [   ] mg.

Phase D.  Expression Optimization.
        (a)     In the event that SFI determines that a supplied Humanized [   
] Antibody meets the Desired Binding Affinity, or is sufficiently close 
thereto for SFI to wish to proceed with that antibody further, it shall so 
inform PDL.  PDL will then optimize the expression process and producer cell 
line having the Desired Process and Cell Line Characteristics as             
defined below to achieve a production yield of at least [   ] mg/106 cells/24 
hours measured under standard tissue culture conditions.  It will then 
transfer to SFI the production process and the  
producer cell line.  The production process shall be scaleable and 
adaptable to pilot production and the cell line shall be sterile (but free of 
chemical sterilizers), and mycoplasma-free (hereinafter "Desired Process and 
Cell Line Characteristics").  It is anticipated that the Program will be 
completed to this point in approximately 6 months.
        (b)     PDL will use its best efforts over a period of approximately 
three months to perform further amplification(s) to increase the production 
yield to at least [   ] mg/106 cells/24 hours measured under standard tissue 
culture conditions, and will provide to SFI the modified production process 
and producer cell line having the Desired Process and Cell Line 
Characteristics and being adaptable to growing serum free.  After delivering 
this cell line, PDL will use its best efforts to develop a clone of such 
producer cell line which, according to appropriate tests and analysis 
performed by PDL, allows stable production at such yields for at least two 
months.  PDL shall provide to SFI such producer cell line.  SANDOZ 
acknowledges that while PDL will exert best efforts in this Phase D(b), SANDOZ 
recognizes that there is no guarantee that PDL will achieve the yields and 
other requirements specified herein.
        (c)     In the event that SFI informs PDL that it wishes to proceed 
with further evaluation with a view to possible development of a [   ] 
Antibody delivered by PDL under Phase A of the Program, PDL will perform the 
steps set forth in sub-paragraphs (a) and (b) above to optimize the expression 
process and producer cell line for that [   ] Antibody, and shall transfer to 
SFI the expression processes and producer cell lines, which shall have the 
Desired Process and Cell Line Characteristics.

ARTICLE 3

OWNERSHIP AND EXPLOITATION OF RESULTS

3.01    Each [   ] or Humanized [   ] Antibody, its production processes 
and its producer cell line developed by PDL under this Agreement, as well as 
all results of pharmacological, toxicology and other tests and evaluations 
relating thereto, shall be the exclusive property of SANDOZ who shall be free 
to deal with them as it sees fit, subject to any rights of third parties and 
SANDOZ' obligations of confidentiality hereunder.  SANDOZ shall also have the 
right to seek and obtain patent protection in relation thereto as it sees fit 
(subject to such rights and obligations) and at its own cost, without 
prejudice however to the right of involved PDL collaborator(s) to be named as 
inventor(s) or co-inventor(s).  PDL will provide all necessary assistance and  
Technical Information to SANDOZ in the event that SANDOZ wishes to seek such 
patent protection.

3.02    Otherwise, Technical Information developed or used by PDL in 
pursuance of the Program under this Agreement, shall remain the property of 
PDL.  It shall, however, be provided by PDL to SANDOZ and may be used by 
SANDOZ to the extent necessary to enable SANDOZ to effectively develop, seek 
marketing approval for, manufacture and market any Licensed Product developed 
by PDL under this Agreement, subject however to the confidentiality 
obligations set forth herein.  Notwithstanding the foregoing, no information 
regarding the sequence of or expression system for any Licensed Product need be 
disclosed to SANDOZ by PDL until PDL has received the Second Benchmark Payment 
provided for hereinafter.

3.03    Conditioned upon and effective on the date of receipt by PDL of 
both the First and Second Benchmark Payments provided for hereinafter, PDL 
hereby grants to SANDOZ and its Affiliates an irrevocable, exclusive worldwide 
license or, as the case may be, sub-license, with the right to grant sub-
licenses, under all relevant existing patent or other proprietary rights 
owned, controlled by or licensed to PDL as of the effective date of this 
license (including the license from the Medical Research Council of England 
("MRC") under the so-called Winter and Boss patents), and under all future 
patent or other proprietary rights resulting from the development work 
performed by PDL under the Program, but only to the extent necessary and only 
for the purpose of enabling SANDOZ to make, have made, use or sell any 
Licensed Product developed under this Agreement.

3.04    Any grant by SANDOZ of sublicenses of the rights granted in 
Article 3.03 shall be subject to the prior written consent of PDL, which 
consent shall not be unreasonably withheld.  Any grant by SANDOZ of further 
sublicenses under the sublicenses received from PDL shall also be subject to 
the terms and conditions (except with regard to royalties which are governed 
by the terms of Article 5 hereinafter) of the license agreement between PDL 
and its licenser.

3.05    Until the date of receipt by PDL of both of the First and Second 
Benchmark Payments provided for hereinafter, SANDOZ agrees that it will not 
sequence or attempt to sequence the Humanized [   ] Antibody(ies).  After 
receipt however, of both the First and Second said Benchmark Payments, PDL 
shall promptly disclose to SANDOZ the sequence of and expression system for,  
the Humanized [   ] Antibody(ies).

ARTICLE 4

PAYMENTS

4.01    Payment on Execution.
  On or before December 20, 1990, Sandoz shall pay to PDL the sum of US 
[   ] in partial consideration of PDL's obligations hereunder.

4.02    First Benchmark Payment.  
(a)     Within 90 days following delivery to SANDOZ of SFI of a 
producer call line and production process having the desired Process and 
Cell Line Characteristics and with a production yield of at least [   ] 
mg/106 cells/24 hours measured under standard tissue culture conditions 
for a Humanized [   ] Antibody having the Desired Binding Affinity (or 
such lesser binding affinity as it had when SANDOZ decided to proceed 
with that antibody under Phase D of the Program), SANDOZ shall pay to 
PDL the sum of US [   ].
(b)     In the event that the producer cell line or Humanized [   ] 
Antibody delivered under Article 4.02(a) do not meet the production 
yield,  binding affinity, or other requirements set forth above, but 
SANDOZ nevertheless decides to proceed to develop such Humanized [   ] 
Antibody, SANDOZ shall be required to pay PDL the First Benchmark 
Payment prior to so proceeding.  For purposes of this Agreement, SANDOZ 
shall be deemed to be "proceeding to develop" such antibody on the 
earlier of (i) the declaration of so-called [   ] in the standard 
SANDOZ development plan for its pharmaceutical research products, or 
equivalent status, for such antibody, or (ii) [   ] months after 
delivery of such antibody by PDL to SANDOZ unless, prior to the 
expiration of such [   ]-month period, SANDOZ shall have terminated this 
Agreement pursuant to Article 8 hereof.
(c)     In the event the First Benchmark Payment is not payable to 
PDL because the Humanized [   ] Antibodies delivered do not meet the 
relevant requirements, and SANDOZ decides to proceed to develop a [   ] 
Antibody delivered by PDL under Phase A of the Program, SANDOZ shall be 
required to pay PDL the sum of US [   ] prior to so proceeding.  For 
purposes hereof, "proceeding to develop" shall have the same meaning as 
set forth in subparagraph (b) above.

4.03    Second Benchmark Payment.
  In the event that SANDOZ decides to proceed with further development 
of any Licensed Product for which the First Benchmark Payment referred to 
under Article 4.02 has been paid or is payable, it shall pay to PDL the sum of 
US [   ] with respect to a Humanized [   ] Antibody.  With respect to a [   ] 
Antibody,  SANDOZ shall pay PDL the sum of US [   ] within 30 days of SANDOZ' 
decision to manufacture the first batch of that Antibody for Phase I clinical 
trials if:  
a) the First Benchmark Payment under Paragraph 4.02(a) has not been 
paid; or 
b) PDL has performed the work under both Phase D(b) and (c).  
PDL understands and accepts that the decision to further proceed with 
development of any such antibody is entirely at SANDOZ discretion and may 
depend on many factors, including (but not limited to) the degree to which 
that antibody retains the effector activity of [   ], its specificity, its 
pharmacokinetics and immunogenicity in animals and the final production yield 
of the production process and producer cell line delivered by PDL at the end 
of Phase D of the Program.

ARTICLE 5

ROYALTIES, PAYMENTS, REPORTS

5.01    Royalties to PDL.
  In further consideration of the rights and licenses granted hereunder, 
SANDOZ shall pay to PDL a royalty of [   ] of the Net Sales Value of all 
Licensed Products sold by SANDOZ or its Affiliates or sublicensees for a 
period of [   ] years from the date of first sale of any Licensed Product in 
each country.  In the event that SANDOZ desires to sublicense its rights 
hereunder and finds that, despite its good faith best efforts, it is unable to 
do so solely because of this royalty rate, the parties shall negotiate in good 
faith to reduce such rate to a rate which is economically beneficial to both 
parties and permits such sublicensing.

5.02    [_____.]
[   ] or sublicensees under sublicenses granted by PDL under 
Article 3.3 above.
[   ]

5.03    Sales Among Affiliates.
  Sales between and among SANDOZ and its Affiliates of Licensed products 
which are subsequently resold or to be resold by such Affiliates shall not be 
subject to royalty, but in such cases royalties shall accrue and be calculated 
on the basis of sales by any such Affiliate of Licensed Products to a non-
Affiliate.

5.04    Combination Products.
  If a Licensed Product is sold in a combination containing another or 
other biologically active therapeutic ingredient(s) which are not Licensed 
Products, then Net Sales Value for purposes of determining royalty payments on 
the combination shall be calculated by multiplying the Net Sales Value of the 
combination by a fraction, the numerator of which shall be the established 
market price for the Licensed Product contained in the combination and the 
denominator of which shall be the sum of the established market prices for the 
Licensed Product and each other biologically active therapeutic ingredient in 
the combination.  When separate market prices for such ingredients are not 
established, then the parties shall negotiate in good faith to determine a 
fair and equitable method of calculating Net Sales Value for the combination.

5.05    Payments.  
Liability for royalties on Licensed Products manufactured by SANDOZ 
and/or its Affiliates or Sub-licensees shall accrue when a Licensed Product is 
sold subject to Section 5.3 hereof.  Royalties which have accrued in any 
Calendar Half Year shall be payable within 60 days after the end of such 
Calendar Half Year.  In addition, within 60 days of the last day of each 
 Interim Calendar Quarter, SANDOZ shall pay to PDL an amount equal to 
one half of the royalties paid for the preceding Calendar Half Year.  A 
payment made during an Interim Calendar Quarter shall be deducted from the 
amount due in the next Calendar Half Year royalty payment.  If the payment in 
the preceding Interim Calendar Quarter exceeds a Calendar Half Year royalty 
payment, a credit equal to the excess payment will be carried forward to 
offset future Calendar Half Year royalty payments.

5.06    Currency Conversion.
  All amounts payable to PDL under this Agreement shall be payable in 
U.S. Dollars, at PDL's option either by a check payable to the order of PDL 
and drawn on a U.S. bank, or by wire transfer to a bank account designated by 
PDL.  In the case of royalties on sales, all amounts payable shall first be 
calculated in the currency of sale and then converted into U.S. Dollars using 
the average of the daily exchange rates for such currency quoted by Citibank 
N.A.'s foreign exchange desk for each of the last thirty (30) banking days of 
each Calendar Half Year.

5.07    Royalty Reports; Inspection.
  Each Calendar Half Year royalty payment shall be accompanied by a 
written report for the applicable period setting forth SANDOZ' computation of 
royalties due under this Agreement in respect of sales by SANDOZ, its 
Affiliates and any sublicensee during the applicable Calendar Half year.  
SANDOZ shall keep, and shall cause its Affiliates and sublicensees to keep, 
accurate records and books of account of all Licensed products sold for a 
prior of at least 3 years following the date of such sale.  Upon reasonable 
notice to SANDOZ and during normal business hours, but not more frequently 
than once a year, an independent Certified Public Accountant paid for and 
selected by PDL and approved by SANDOZ, such approval not to be unreasonably 
withheld, may inspect such books and records under this Agreement.  
Notwithstanding the foregoing, if a material discrepancy of more than 5% or 
$5,000 (whichever is greater) in SANDOZ' favor is found between royalties paid 
and actual royalties due for any Calendar Half Year, all costs of such 
inspection shall be borne by SANDOZ.  Following any such inspection, the 
parties shall make any adjustments necessary in respect of royalties 
previously paid to PDL.

ARTICLE 6

WARRANTIES; NO WARRANTIES, INDEMNIFICATION

6.01    Warranties.
  The parties warrant that they know of no legal reason to prevent them 
entering into this Agreement.  In addition, PDL warrants that it knows of no 
reason why its humanization technology should not be sufficiently applicable 
to [   ] to achieve the objectives of this Agreement.

6.02    No Warranties.
  PDL makes no representations or warranties, expressly or impliedly 
(except as specifically set forth or contemplated herein) with respect to any 
producer cell line or production process or Humanized [   ] Antibody delivered 
to SANDOZ under this Agreement.  In particular, PDL makes no representations 
or warranties as to the merchantability or fitness for any particular purpose 
of any such Antibody or that its manufacture, use or sale will not infringe 
any patent or other proprietary rights other than those licensed or sub-
licensed hereunder.

6.03    Indemnification.
  SANDOZ will indemnify and hold PDL harmless against any and all 
liability, loss, damage, claim or expense (including reasonable attorney's 
fees) resulting from any use, testing, manufacture, packaging, labeling, or 
sale by SANDOZ, its Affiliates or its sublicensees of any producer cell line 
or production process transferred to SANDOZ (or its Affiliates) by PDL under 
this Agreement or of any Licensed Product, provided that such damage, claim or 
expense has not been caused by any gross negligence of PDL.  In the event that 
it has been caused by such gross negligence, PDL shall correspondingly 
indemnify SANDOZ and its Affiliates and Sublicensees.

ARTICLE 7

CONFIDENTIALITY

7.01    Confidentiality.
  Each party shall keep confidential, and shall not use for any purpose 
other than the development and commercial exploitation of Licensed Products 
developed by PDL hereunder, during the term of this Agreement and for five 
years after termination hereof, all Technical Information heretofore and 
hereafter supplied by the other, provided however, that the foregoing 
obligation of confidentiality shall not apply to the extent that any Technical 
Information:
 (a)    is already known to the recipient at the time of disclosure 
or is developed by recipient thereafter in the course of work entirely 
independent of any disclosure by the other party;
(b)     is publicly known prior to or becomes publicly known after 
disclosure other than through acts or omissions of the recipient; or
(c)     is disclosed in good faith to recipient by a third party 
under a reasonable claim or right. 
In addition, disclosure may be made by SANDOZ or its Affiliates 
(i) to governmental agencies to the extent required or desirable to 
secure governmental approval of the development or marketing of Licensed 
Products provided that all reasonably possible steps are taken by SANDOZ 
to assure the confidentiality of the 
information in the hands of such agencies, (ii) to pre-clinical 
and clinical investigators under a secrecy agreement with essentially 
the same confidentiality provisions contained herein and then only where 
necessary for SANDOZ to exercise its rights hereunder and (iii) to 
others to the extent necessary in order to enable SANDOZ and its 
Affiliates effectively and skillfully to develop, manufacture or market 
a Licensed Product, to the extent normal and usual in the custom of the 
trade, and then only under a secrecy agreement with essentially the same 
confidentiality provisions contained herein.  SANDOZ shall be 
responsible for any breach of these confidentiality obligations by the 
parties identified in clauses (ii) and (iii).

ARTICLE 8

TERM AND TERMINATION

8.01    Term.
  This Agreement shall come into force on the date first set forth above 
and shall unless terminated earlier in accordance with this Article 8 continue 
until expiration of the obligation to pay royalties to PDL, or to MRC or other 
third parties through PDL, in accordance with Article 5 above, whichever is 
later.  Thereafter, this Agreement shall terminate and all licenses or sub-
licenses granted hereunder shall become fully paid-up, irrevocable non-
exclusive licenses.

8.02    Termination.
8.02.1  This Agreement may be terminated on 60 days prior 
written notice by SANDOZ in the event that PDL does not exert its best 
efforts (to be determined in case of dispute by Arbitration in 
accordance with Article 9.01 hereinafter) as required by Article 2.02 
above.

8.02.2  This Agreement may also be terminated immediately on 
written notice by SANDOZ in the event that (a) it decides in accordance 
with Article 2.03 that it does not wish to pursue either of the isotypes 
provided to it by PDL following Phase A of the Program or (b) neither of 
the Humanized [   ] Antibodies provided to it by PDL following Phase C 
of the Program meet the Desired Binding Affinity or come sufficiently 
close thereto for SANDOZ to wish to further pursue this Agreement.

8.02.3  If either party shall at any time default in the 
payment of any royalty, or the making of any report hereunder, or shall 
commit any material breach of any covenant or agreement herein contained 
or shall make any false report, and shall fail to have initiated and 
actively pursued remedy of any such default or breach within 60 days 
after receipt of written notice thereof by the other party, that other 
party may, at its option, cancel this Agreement and revoke any rights 
and licenses herein granted and directly affected by the default or 
breach by notice in writing to such effect, but such act shall not 
prejudice the right of the party giving notice to recover any royalty or 
other sums due at the time of such cancellation, it being understood, 
however, that if within 60 days after receipt of any such notice the 
receiving party shall have initiated and actively pursued remedy of its 
default, then the rights and licenses herein granted shall remain in 
force as if no breach or default had occurred on the part of the 
receiving party, unless such breach or default is not in fact remedied 
within a reasonable period of time.

8.02.4  Either party may terminate this Agreement, and the 
licenses granted herein, in the event that:  (1) the other party becomes 
insolvent or enters in any arrangement or composition with creditors, or 
makes an assignment for the benefit of creditors; (2) there is a 
dissolution, liquidation or winding-up of the other party's business; or 
(3) a trustee in bankruptcy of the assets of the other party is 
appointed and such trustee does not, within thirty (30) days after 
receipt of written notice from the other party, confirm this Agreement 
and provide adequate assurance that the terms and conditions hereof 
shall faithfully be fulfilled.

8.02.5  The right of either party to terminate this Agreement 
as hereinabove provided shall not be affected in any way by its waiver 
of, or failure to take action with respect to, any previous failure to 
perform hereunder.

8.02.6  The confidentiality and indemnity obligations and any 
accrued payment obligations under Articles 4, 5, 6.03 and 7 shall 
survive any termination of this Agreement.

ARTICLE 9

MISCELLANEOUS

9.01    Force Majeure.
  Neither party shall be responsible to the other for failure or delay 
in performing any of its obligations under this Agreement or for other non-
performance hereof provided that such delay or non-performance is occasioned 
by a cause beyond the reasonable control and without fault or negligence of 
such party, including, but not limited to fire, flood, explosion, 
discontinuity in the supply of power, court order or governmental 
interference, act of God, strike or other labor trouble and provided that such 
party will immediately inform the other party and that it will entirely 
perform its obligations immediately after the relevant cause has ceased its 
effect.

9.02    Validity.
  Should one or several provisions of the Agreement be or become 
invalid, then the parties hereto shall substitute such invalid provisions by 
valid ones, which in their economic effect come so close to the invalid 
provisions that it can be reasonably assumed that the parties would have 
contracted this Agreement with those new provisions.  In case such provisions 
cannot be found, the invalidity of one or several provisions of the Agreement 
shall not affect the validity of the Agreement as a whole, unless the invalid 
provisions are of such essential importance for this Agreement that it is to 
be reasonably assumed that the parties would not have contracted this 
Agreement without the invalid provisions.

9.03    Arbitration.
  Any controversy or claim arising out of or relating to this Agreement, 
or the breach thereof, which cannot be satisfactorily resolved by the parties 
by correspondence or mutual conference shall be determined by arbitration in 
London, England, or such other venue as may be mutually agreed upon, under the 
then prevailing rules of the International Chamber of Commerce; provided 
however, that if any issue in dispute involves scientific or technical 
matters, the arbitrator(s) chosen shall have educational training and/or 
experience sufficient to demonstrate a reasonable level of knowledge in the 
field of biotechnology.  The decision of the arbitrators shall be final and 
binding and any party may apply for judgment upon the award rendered by the 
arbitrator(s) in a court having jurisdiction thereover.

9.04    Notices.
  All notices, documents, statements, reports and other writings 
required or permitted to be given by the terms of this Agreement shall be sent 
either by pre-paid, registered or certified mail, telegram, telecopier or 
telex, properly addressed to PDL and to SANDOZ at their respective addresses 
first given above or at such other address as one party hereto may from time 
to time designate by notice in writing to the other.  Each notice shall be 
deemed to be given upon receipt.

9.05    Governing Law.
  This Agreement shall be subject to the laws of California, United 
States of America.

9.06    Entire Agreement.
  This Agreement embodies the entire understanding of the parties 
relating to the subject matter hereof and supersedes all prior understandings 
and agreements, except that certain Confidentiality Agreement dated November 
17, 1988 and that certain Confidentiality Disclosure Agreement dated October 
18, 1990 between the parties, which shall survive.  No modification or 
amendment of this Agreement shall be valid or binding except by a writing 
signed by each of the parties.

9.07    Assignment.
  The rights of either party under this Agreement may not be assigned, 
and the duties of either party under this Agreement may not be delegated, 
without the prior written consent of the other party, which consent shall not 
be unreasonably withheld.

9.08    Headings.
  Any headings and captions used in this Agreement are for convenience 
and reference only and are not a part of this Agreement.  

9.09    Counterparts.
  This Agreement may be executed in any number of counterparts, each of 
which shall be deemed to be an original, and such counterparts together shall 
constitute one agreement.

IN WITNESS WHEREOF, the parties hereto have dully executed this 
Development and License Agreement as of the date first above written.


PROTEIN DESIGN LABS

By: /s/ Laurence Jay Korn

Title:  President


SANDOZ PHARMA LTD.

By:  /s/ xxxxx             /s/ xxxxx

Title:  Vice President Research/Vice 
        President Patents

 

EXHIBIT 10.16

CONFIDENTIAL TREATMENT REQUESTED

                         DEVELOPMENT AND LICENSE AGREEMENT
              FOR HUMANIZED MONOCLONAL ANTIBODIES AGAINST gpllb/llla
                                   between
                          PROTEIN DESIGN LABS, INC.
                                   and
                    YAMANOUCHI PHARMACEUTICAL COMPANY, LTD.


                         DEVELOPMENT AND LICENSE AGREEMENT


Effective 12 February 1991 ("Effective Date"), PROTEIN DESIGN LABS, 
INC., a Delaware corporation having offices at 2375 Garcia Avenue, Mountain 
View, CA 94043 USA ("PDL") and YAMANOUCHI PHARMACEUTICAL CO., LTD., a Japanese 
corporation having offices at No. 1-8 Azusawa 1 -chome, Itabashi-ku, Tokyo 174 
Japan ("YAMANOUCHI") agree as follows:

1.      BACKGROUND

1.1     YAMANOUCHI owns rights to make, have made, use or sell a 
proprietary murine monoclonal antibody against gpllb/llla ("Murine Anti-
gpllb/llla Antibody").

1.2     YAMANOUCHI wishes to have developed humanized derivatives of 
a Murine Anti-gpllb/llla Antibody, including F(ab')2 and Fab fragments 
thereof (collectively "Humanized Anti-gpllb/llla Antibody").

1.3     PDL is willing to undertake such development effort and to 
grant to YAMANOUCHI an exclusive worldwide license under PDL's patent 
applications and other proprietary rights to such Humanized Anti-
gpllb/llla Antibody.

2.      DEFINITIONS

2.1     "Background Patents" means all patent applications and 
issued patents in the United States or any foreign jurisdictions, 
including any addition, continuation, continuation-in-part or division 
thereof or any substitute application based on U.S. Patent Application 
S.N. 310,252 filed February 13, 1989 entitled "Designing Improved 
Humanized Immunoglobulins."

2.2     "Exclusive Period" means the term beginning as of the 
Effective Date and either:
(a)     ending on the later of January 1, 1995 or one year 
after the last payment pursuant to Paragraph 5.6.1 (a), (b), (c) 
and (d); or 
(b)     becoming perpetual upon the payment specified in 
Paragraph 5.6.1 (e).
The Exclusive Period defines the period during which PDL agrees not to 
humanize any other murine antibody against the target antigen gpllb/llla as 
provided in Paragraph 4.6 hereof.

2.3     "gpllb/llla" means the antigens gpllb and gpllla, together 
including their complex, or separately.

2.4     "Hybridoma Cell Line" means a hybridoma cell line producing 
Murine Anti-gpllb/llla Antibody in sufficient quantity to enable PDL to 
undertake its duties and obligations under this Agreement.

2.5     "Licensed Patents" means all patent applications and issued 
patents in the United States or any foreign jurisdictions, including any 
addition, continuation, continuation-in-part or division thereof or any 
substitute application claiming the Humanized Anti-gpllb/llla Antibody.

2.6     "Licensed Products" means products, for any use, 
incorporating any Humanized Anti-gpllb/llla Antibody, including all or 
any part thereof, whether or not developed by PDL under this Agreement.

2.7     "Net Sales" means the gross invoice price charged by 
YAMANOUCHI for any Licensed Product sold to third parties in bona fide 
arm's length transactions less the following deductions as incurred by 
YAMANOUCHI:
(a)     discounts and rebates;
(b)     returns;
(c)     charges of transportations, insurance and packing; and
(d)     duties and taxes assessed on sales.

2.8     "Non-Exclusive Period" means the term, if any, beginning the 
later of January 1, 1995 or one year after the last payment pursuant to 
Paragraphs 5.6.1(a), (b), (c) and (d) and ending on the termination or 
expiration of the Agreement.  Once the payment of Paragraph 5.6.1(e) is 
paid, there is no Non-Exclusive Period under this Agreement.

2.9     "Technical Information" means confidential proprietary 
technical information, know-how and materials owned by YAMANOUCHI or PDL 
as of the Effective date, or hereinafter developed by YAMANOUCHI or PDL 
in connection with this Agreement and relating to the Hybridoma Cell 
Line or Humanized Anti-gpllb/llla Antibody or their manufacture or use 
for any purpose.  In particular, the producer cell line(s) developed by 
PDL under this Agreement is PDL Technical Information.

2.10    "YAMANOUCHI" is understood to include all of its Affiliates.  
An "Affiliate" means any corporation or other business entity controlled 
by, controlling or under common control with YAMANOUCHI; "control" means 
direct or indirect beneficial ownership of at least 50% of the voting 
shares of a corporation or any corporation in which the maximum amount 
of stock permitted by law is beneficially owned by YAMANOUCHI.




3.      DEVELOPMENT

3.1     Delivery of Hybridoma Cell Line.
  Immediately upon execution of this Agreement, YAMANOUCHI shall. 
provide to PDL a sufficient quantity of a Hybridoma Cell Line together 
with any Technical Information which in the judgment of YAMANOUCHI and 
PDL would be useful in assisting PDL to accomplish the objectives of 
this Agreement.  Upon completion of the development work contemplated 
under this Agreement or termination of this Agreement, which ever is 
earlier, any and all quantities of the Hybridoma Cell Line in the 
possession of PDL shall immediately be returned to YAMANOUCHI or 
destroyed, in accordance with YAMANOUCHI'S instruction.

3.2     Development of Humanized Antibody.

3.2.1   Upon receipt of the Hybridoma Cell Line, PDL shall 
immediately commence and diligently pursue commercially reasonable 
efforts to apply its proprietary humanization technology to the 
Murine Anti-gpllb/llla Antibody with the objective of producing:
(a)     a humanized anti-gpllb/llla intact antibody;
(b)     a humanized F(ab')2 fragment of such antibody; 
and
(c)     a humanized Fab fragment of such antibody.

3.2.2   PDL agrees to provide YAMANOUCHI with reports upon 
determination of DNA sequence of Murine Anti-gpllb/llla Antibody, 
upon completion of a chimeric anti-gpllb/llla antibody and upon 
completion of the humanization of anti-gpllb/llla intact antibody.

3.3     Manufacturing Agreements.
  Upon request by YAMANOUCHI, PDL agrees to consider manufacturing 
Humanized Anti-gpllb/llla Antibody for and on behalf of YAMANOUCHI on 
terms to be reasonably negotiated.

4.      OWNERSHIP AND EXPLOITATION OF RESULTS

4.1     YAMANOUCHI Rights.
  The Humanized Anti-gpllb/llla Antibody developed by PDL under. 
this Agreement, as well as all results of pharmacological, toxicology 
and other tests and evaluations relating thereto, shall be exclusively 
used for commercial purposes by YAMANOUCHI, subject to any rights of 
third parties and YAMANOUCHI's obligations of confidentiality hereunder.

4.2     Patent Applications/Patents.

4.2.1   During the Exclusive Period: PDL shall file and 
prosecute all U.S. patent applications on Humanized Anti-
gpllb/llla Antibody, which will be jointly assigned to PDL and 
YAMANOUCHI.  PDL shall use its best efforts to have such 
applications granted.  YAMANOUCHI, at its option, shall have the 
right to file and prosecute all non-U.S. patent applications on 
Humanized Anti-gpllb/llla Antibody which will be jointly assigned 
to PDL and YAMANOUCHI.  Each party shall keep the other informed 
as to the patent filing and prosecution status and will provide 
the other with copies of the patent application(s) and subsequent 
correspondence with the various patent examining offices.  Within 
thirty days of YAMANOUCHI's receipt of a statement from PDL, 
YAMANOUCHI agrees to reimburse PDL for all direct costs including 
fees, out-of-pocket legal expenses, etc. charged to PDL by non-PDL 
entities with respect to the filing, prosecution and maintenance 
of Licensed Patents.

4.2.2   During the Non-Exclusive Period or upon. termination 
of the Agreement: PDL and YAMANOUCHI shall mutually agree as to 
the filing and prosecution of all Licensed Patents.  Neither party 
shall be obligated to account to the other for its use or 
exploitation or sublicensing of jointly owned Licensed Patents; 
provided however, rights to the Humanized Anti-gpllb/llla Antibody 
developed by PDL are vested exclusively in YAMANOUCHI as provided 
in Paragraph 4.1 of this Agreement.

4.3     Infringement by Others/Infringement Claims.  

4.3.1   During the Exclusive Period and the Non-Exclusive 
Period: YAMANOUCHI shall be responsible for prosecuting patent 
infringements of Licensed Patents by third parties and/or 
defending patent infringements claimed by third parties.  PDL 
shall cooperate with YAMANOUCHI in providing information 
reasonably necessary to such actions.

4.3.2   Upon termination of the Agreement: PDL and YAMANOUCHI 
each have the right to prosecute patent infringements of Licensed 
Patents by third parties.

4.4     PDL Rights.
  The producer cell line and all other Technical Information 
developed or used by PDL under this Agreement shall remain the property 
of PDL.  Upon receipt of the Second Benchmark Payment provided for in 
Paragraph 5.2.3, PDL will disclose the sequence information about 
Humanized Anti-gpllb/llla Antibody and PDL shall provide Technical 
Information to YAMANOUCHI to the extent necessary to enable YAMANOUCHI 
to effectively develop, seek marketing approval for, manufacture and 
market any Humanized Anti-gpllb/llla Antibody developed by PDL under 
this Agreement, subject however to the confidentiality obligations set 
forth herein.

4.5     Grant of Licenses.
  Conditioned upon and effective on the date of receipt by PDL of 
the Second Benchmark Payment of Paragraph 5.2.3, PDL shall grant to 
YAMANOUCHI the following licenses, to the extent necessary for 
YAMANOUCHI to make, have made, use or sell any Humanized Anti-gpllb/llla 
Antibody developed by PDL:
(a)     a worldwide nonexclusive license under 
Background Patents or other proprietary rights owned by PDL 
for the sole purpose of enabling YAMANOUCHI to make, have 
made, use or sell any Humanized Anti-gpllb/llla Antibody 
developed by PDL.
(b)     a worldwide nonexclusive sublicense under the 
Medical Research Council (MRC) of England's so-called Winter 
(Application Number UK PA 8607679 27.03.86) and Boss 
(European Patent Application 0 120 694 (84301996.9)) patent 
applications for the sole purpose of enabling YAMANOUCHI to 
make, have made, use or sell any Humanized Anti-gpllb/llla 
Antibody developed by PDL;
(c)     to the extent PDL is legally able to do so and 
upon request by YAMANOUCHI, nonexclusive sublicense(s) to 
any other third party patents licensed to PDL for the sole 
purpose of enabling YAMANOUCHI to make, have made, use or 
sell any Humanized Anti-gpllb/llla Antibody developed by 
PDL; and
(d)     a worldwide exclusive license to PDL's rights in 
those specific claims, if any, in Licensed Patents which 
claim Humanized Anti-gpllb/llla Antibody developed by PDL.

4.6     Exclusivity Agreement.
   PDL agrees not to humanize any other murine antibody, or part 
thereof, against the target antigen gpllb/llla for any other party 
during the Exclusive Period.

4.7     License to Third Parties.
  Upon written request by YAMANOUCHI, PDL shall grant the rights 
granted to YAMANOUCHI under Paragraph 4.5 to other company(ies) to 
enable said other company(ies) to manufacture and market Humanized Anti-
gpllb/llla Antibody developed by PDL; provided, however, that YAMANOUCHI 
and said other company agree with PDL in writing that:
(a)     said other company(ies) is bound by the terms of 
this Agreement;
(b)     sales by said other company(ies) shall be deemed 
sales by YAMANOUCHI; and
(c)     YAMANOUCHI is responsible for compliance with 
this Agreement by said other company(ies).

5.      PAYMENTS

5.1     Payment on Execution.
  Within ten (10) days of the execution of this Agreement, 
YAMANOUCHI shall pay to PDL a nonrefundable Development and License 
issue fee of One Million Dollars (US $1,000,000).  PDL shall use 
commercially reasonable efforts to deliver samples of:
           (i)     a humanized anti-gpilb/llla intact 
           antibody;
           (ii)    a humanized F(ab')2 fragment thereof; and
           (iii)   a humanized Fab fragment thereof; 
           ("Delivered Samples") within one year of the receipt 
           by PDL of Hybridoma Cell Line from YAMANOUCHI; 
           however, pursuant to Paragraph 5.2.8 below, PDL may 
           deliver Delivered Samples to YAMANOUCHI within fifteen 
           (15) months without penalty.

5.2     Benchmark Payments.

5.2.1   YAMANOUCHI shall make the determination whether or not 
each of Delivered Samples has a binding affinity not less than 25% 
of the corresponding original Murine Anti-gpllb/llla Antibody or 
fragments thereof ("Binding Affinity Requirement") within sixty 
(60) days after receipt of such Delivered Samples.  YAMANOUCHI and 
PDL agree that binding affinity will be measured by the method of 
competitive binding set forth in Queen, et al., Proceedings of the 
National Academy of Sciences, USA, 86, 1030 (1989).  YAMANOUCHI 
agrees to provide PDL with samples of Murine Anti-gpllb/llla 
Antibody, F(ab')2 and Fab fragments thereof in order for PDL to 
perform the competitive binding assay.  In addition, PDL agrees to 
perform Scatchard plot analyses of Delivered Samples.  If such 
Delivered Samples meet the Binding Affinity Requirement, 
YAMANOUGHI shall pay PDL [   ] ("First Benchmark Payment") within 
thirty (30) days after such determination.  If YAMANOUCHI has not 
determined the binding affinity within sixty (60) days after 
receipt of last Delivered Sample, then First Benchmark Payment is 
due ninety (90) days after receipt of last Delivered Sample.

5.2.2   YAMANOUCHI and PDL shall promptly commence inhibition 
of platelet aggregation and other in vitro assays as described in 
Exhibit A to determine the biological activity of Delivered 
Samples.  Within one (1) month of receipt by YAMANOUCHI of the 
last of Delivered Samples, YAMANOUCHI shall inform PDL in writing 
if the platelet aggregation inhibition activity of each 
CONFIDENTIAL TREATMENT REQUESTED
Delivered Sample does or does not meet YAMANOUCHI's criteria 
for further development.

5.2.3   If YAMANOUCHI informs PDL that one or more of 
Delivered Samples meets YAMANOUCHI's criteria for further 
development, PDL shall commence production of sample quantities 
sufficient for further testing.  YAMANOUCHI shall pay PDL [   ] 
("Second Benchmark Payment") within four (4) months of receipt by 
YAMANOUCHI of: 
[   ] mg of humanized anti-gpllb/llla intact antibody;
[   ] mg of humanized F(ab')2 fragment thereof; and 
[   ] mg of humanized Fab fragment thereof.

Concurrent with such payment, YAMANOUCHI shall inform PDL in writing as to 
which cell line YAMANOUCHI wishes PDL to deliver pursuant to Paragraph 5.2.4.

5.2.4   YAMANOUCHI shall pay PDL [   ] ("Third Benchmark 
Payment") upon receipt of the producer cell line requested by 
YAMANOUCHI pursuant to Paragraph 5.2.3, said producer cell line 
having an expression level, as measured under standard tissue 
culture conditions, of at least: 
[   ] mg/106cells/ml/24 hours, if producing humanized anti-
gpllb/llla intact antibody;
the molar equivalent of [   ]mg/106cells/ml/24 hours intact 
antibody, if producing F(ab')2; 
the molar equivalent of [   ]mg/106cells/ml/24 hours intact 
antibody, if producing Fab.

5.2.5   If Delivered Samples do not meet the Binding Affinity 
Requirement and YAMANOUCHI requests in writing that PDL develop 
another Humanized Anti-gpllb/llla Antibody, PDL will have the 
option at no additional cost to YAMANOUCHI to develop another 
Humanized Anti-gpllb/llla Antibody.  If PDL delivers to YAMANOUCHI 
another Humanized Anti-gpllb/llla Antibody which meets the Binding 
Affinity Requirement, YAMANOUCHI shall pay PDL the Benchmark 
Payment in accordance with Paragraph 5.2.1.

5.2.6   If PDL has received written notice pursuant to 
Paragraph 5.2.2 that the platelet aggregation activity of 
Delivered Samples do not meet YAMANOUCHI's requirement for further 
development and YAMANOUCHI requests in writing that PDL develop 
another Humanized Anti-gpllb/llla Antibody, PDL will have the 
option at no additional cost to YAMANOUCHI to develop another 
Humanized Anti-gpllb/llla Antibody.  If PDL delivers to YAMANOUCHI 
another Humanized Anti-gpllb/llla Antibody which meets 
CONFIDENTIAL TREATMENT REQUESTED
YAMANOUCHI's platelet aggregation activity requirement for 
further development, YAMANOUCHI shall so inform PDL and PDL will 
produce testing samples as provided in Paragraph 5.2.3.

5.2.7   Notwithstanding the failure to meet the Binding 
Affinity Requirement, if YAMANOUCHI decides to proceed to conduct 
animal studies with Humanized Anti-gpllb/llla Antibody or any 
other Licensed Product, YAMANOUCHI agrees to pay PDL the First 
Benchmark Payment prior to so proceeding.

5.2.8   If PDL has not delivered Delivered Samples within 
fifteen (15) months of the receipt of the Hybridoma Cell Line from 
YAMANOUCHI, the First Benchmark Payment will be reduced by 5% for 
each month thereafter until PDL delivers Delivered Samples.  If 
PDL delivers Delivered Samples prior to the one year period, 
YAMANOUCHI agrees to pay PDL an additional 5% of the First 
Benchmark Payment for each month by which PDL's delivery precedes 
the end of such period.  For example, if PDL delivers Delivered 
Samples within 10 months of the receipt of the Hybridoma Cell 
Line, YAMANOUCHI shall pay PDL [   ]; if PDL delivers Delivered 
Samples no later than fifteen months from the receipt of the 
Hybridoma Cell Line, YAMANOUCHI shall pay PDL $880,000; if PDL 
delivers Delivered Samples within 18 months of the receipt of the 
Hybridama Cell Line, YAMANOUCHI shall pay PDL $680,000.  Neither 
bonuses nor penalties will be applied if PDL develops another 
Humanized Anti-gpllb/llla Antibody(s) pursuant to Paragraphs 5.2.5 
or 5.2.6. For purposes of this Paragraph 5.2.8, a "month" means 
the time period from the actual date in one month to the same date 
in the next month, i.e., November 10 to December 10 constitutes 
one month.

5.3     Royalties to PDL.
  YAMANOUCHI agrees to pay PDL earned royalties of [   ] on the 
Net Sales of all Licensed Products sold by YAMANOUCHI for a period of [   
] years from the date of first commercial sale of any Licensed Product 
in each country.  YAMANOUCHI agrees to promptly inform PDL in writing of 
the date of first commercial sale in each country.  In the event of 
significant material improvements made by YAMANOUCHI on the Licensed 
Products, PDL and YAMANOUCHI shall discuss and agree upon lower 
royalties than [   ].

5.4     Royalties to Third-Parties.

5.4.1   YAMANOUCHI shall pay MRC earned royalties of [   ] on 
the Net Sales of all Licensed Products sold by YAMANOUCHI in each 
country where the Winter and Boss patents are valid under the 
sublicense of Paragraph 4.5(b).

5.4.2   PDL shall discuss with YAMANOUCHI the necessity of any 
sublicenses of Paragraph 4.5(c).  [   ].   If YAMANOUCHI wishes to 
obtain such nonexclusive sublicense(s) to any other third party 
patents nonexclusively licensed to PDL and which PDL is legally 
able to sublicense to YAMANOUCHI, royalties under such 
sublicense(s) shall be borne by YAMANOUCHI.

5.4.3   Third party royalties, including those payable to the 
MRC, borne by YAMANOUCHI shall be paid by YAMANOUCHI through PDL 
who shall remit payment to such third party licensor(s).  At PDL's 
option, YAMANOUCHI shall make direct payment to such third parties 
of the third party royalties borne by YAMANOUCHI.

5.5     Combination Products.
  If a Licensed Product is sold in a combination containing 
another or other biologically active therapeutic ingredient(s) which are 
not Licensed Products, then Net Sales for purposes of determining 
royalty payments on the combination shall be calculated by multiplying 
the Net Sales of the combination by a fraction, the numerator of which 
shall be the established market price for the Licensed Product contained 
in the combination and the denominator of which shall be the sum of the 
established market prices for the Licensed Product and each other 
biologically active therapeutic ingredient in the combination.  When 
separate market prices for such ingredients are not established, then 
the parties shall negotiate in good faith to determine a fair and 
equitable method of calculating Net Sales for the combination.

5.6     Exclusive Period Maintenance Fees.

5.6.1   YAMANOUCHI, at its option, may elect to maintain the 
Exclusive Period beyond January 1, 1995 on a year to year basis by 
paying the following Exclusive Period maintenance fees:
(a)     [   ] beginning January 1, 1995 and each January 
thereafter until January 1, [   ];
(b)     [   ] on January 1, [   ];
(c)     [   ] on January 1, [   ];
(d)    beginning January 1, [   ] and each January 1 
thereafter:
          (i)     prior to the first commercial sale for 
          therapeutic purposes, [   ]; or
          (ii)    after the first commercial sale for 
          therapeutic purposes, [   ].
(e)     Upon payment by YAMANOUCHI of cumulative earned 
royalties of [   ] to PDL, the maintenance fees otherwise 
required above will no longer be payable.

5.6.2   The maintenance fees of Paragraph 5.6.1 are 
nonrefundable but shall be credited to YAMANOUCHI against up to 
fifty percent (50%) of each earned royalty payment which 
YAMANOUCHI would be required to pay pursuant to Paragraph 5.3 
until the entire credit is exhausted.

6.      REPORTS, PAYMENTS, ACCOUNTING

6.1     Reports and Payment.
  After the first commercial sale, YAMANOUCHI shall make written 
reports and earned royalty payments to PDL within ninety (90) days after 
the end of each calendar quarter.  This report shall state the number, 
description, and aggregate Net Sales of Licensed Products during such 
completed calendar quarter, and resulting calculation pursuant to 
Paragraphs 5.3 and 5.4 of earned royalty payment for such completed 
calendar quarter.  Concurrent with the making of each such report, 
YAMANOUCHI shall include payment of royalties for the calendar quarter 
covered by such report.  All payments to PDL shall be in U.S. Dollars 
and net of all non-U.S. taxes.

6.2     Accounting.
  YAMANOUCHI agrees to keep records for a period of three (3) 
years showing the manufacturing, sales, use, and other disposition of 
Licensed Products sold or otherwise disposed of under this Agreement in 
sufficient detail to enable the royalties payable hereunder by 
YAMANOUCHI to be determined, and further agrees to permit its books and 
records to be examined from time to time to the extent necessary to 
verify reports provided for in Paragraph 6.1.  Such examination is to be 
made by PDL, or at PDL's option an independent auditing firm selected by 
PDL, at the expense of PDL, except in the event that the results of the 
audit reveal a discrepancy in YAMANOUCHI's favor of five percent (5%) or 
more, then all expenses of the examination shall be paid by YAMANOUCHI.  
Any discrepancies will be promptly corrected by payment by either party.

6.3     Currency Conversion.
  The royalty on sales made in currencies other than U.S. Dollars 
shall be calculated using the average of the daily exchange rates for 
such currency quoted by Citibank N.A.'s foreign exchange desk, for each 
of the last thirty (30) banking days of each calendar quarter.  All 
payments to PDL shall be in U.S. Dollars and net of all non-U.S. taxes.

6.4     Progress Report.
  On or before September 1 of each year until YAMANOUCHI markets a 
Licensed Product(s), YAMANOUCHI shall make a written annual report to 
PDL covering the year ending an the preceding June 30, regarding the 
progress of YAMANOUCHI toward commercialization of Licensed Products.  
Such report shall include, as a minimum, information sufficient to 
enable PDL to ascertain progress by YAMANOUCHI toward developing and 
marketing Licensed Products.

7.      WARRANTIES;  NO WARRANTIES, INDEMNIFICATION

7.1     Warranties.
  The parties warrant that they know of no legal reason to prevent 
them from entering into this Agreement.

7.2     No Warranties.
  PDL makes no representations or warranties, express or implied, 
with respect to any producer cell line or Humanized Anti-gpllb/llla 
Antibody delivered to YAMANOUCHI under this Agreement.  In particular, 
PDL makes no representations or warranties as to the merchantability or 
fitness for any particular purpose of any such antibody or that its 
manufacture, use or sale will not infringe any patent or other 
proprietary rights other than those licensed or sublicensed hereunder.

7.3     Indemnification.
 YAMANOUCHI will indemnify and hold PDL harmless against any and 
all liability, loss, damage, claim or expense (including reasonable 
attorney's fees) resulting from any use, testing, manufacture, 
packaging, labeling, or sale by YAMANOUCHI of any producer cell line, 
antibody, antibody fragment thereof or any Licensed Products.

8.      CONFIDENTIALITY AND PUBLICATIONS.

8.1     Confidentiality.
  Each party shall keep confidential, and shall not use for any 
purpose other than the development and commercial exploitation of any 
Humanized Anti-gpllb/llla Antibody developed by PDL hereunder, during 
the term of this Agreement and for five years after termination hereof, 
all Technical Information supplied by the other, provided however, that 
the foregoing obligation of confidentiality shall not apply to the 
extent that any Technical Information:
(a)     is already known to the recipient at the time of 
disclosure or is developed by recipient thereafter in the 
course of work entirely independent of any disclosure by the 
other party;
(b)     is publicly known prior to or becomes publicly 
known after disclosure other than through acts or omissions 
of the recipient; or
(c)     is lawfully disclosed in good faith to recipient 
by a third party.
In addition, disclosure may be made by YAMANOUCHI (i) to governmental 
agencies to the extent required or desirable to secure governmental approval 
for the development or marketing of any Humanized Anti-gpllb/llla Antibody 
developed by PDL provided that all reasonably possible steps are taken by 
YAMANOUCHI to assure the confidentiality of the information in the hands of 
such agencies, or (ii) to preclinical and clinical investigators under a 
secrecy agreement with essentially the same confidentiality provisions 
contained herein and then only where necessary for YAMANOUCHI to exercise its 
rights hereunder.  YAMANOUCHI shall be responsible for any breach of these 
confidentiality obligations by the parties above.
YAMANOUCHI and PDL agree that a breach or threatened breach of any of 
the confidentiality obligations contained herein will result in irreparable 
and continuing damage to the other party for which there will be no adequate 
remedy at law and that, in the event of such breach or threatened breach, the 
damaged party shall be entitled to injunctive relief, an order for specific 
performance and/or other provisional or equitable relief, and such other and 
further relief as may be proper (including money damages).

8.2     Publications.
  Each party agrees to give the other party reasonable opportunity 
to review and comment on any proposed publication arising from the 
development of a Humanized Anti-gpllb/llla Antibody under this 
Agreement.  Determination of authorship for any paper shall be in 
accordance with accepted scientific practice.

9.      TERM AND TERMINATION

9.1     Term.
  This Agreement is effective on the date first set forth above 
and shall, unless terminated earlier in accordance with this Article 9, 
continue until expiration of the obligation to pay royalties to PDL, or 
to MRC or other third parties through PDL, in accordance with 
Paragraphs 5.3 and 5.4 above, whichever is later; provided, however, 
this Agreement shall be continued on a country-by-country basis so long 
as YAMANOUCHI elects to maintain this Agreement by paying revised 
royalties after the expiration of YAMANOUCHI's obligation to pay 
royalties in accordance with Paragraph 5.3. In such case, PDL and 
YAMANOUCHI shall discuss and agree upon revised royalties which shall be 
lower than the earned royalties defined in Paragraph 5.3.

9.2     Termination.

9.2.1   YAMANOUCHI may terminate this Agreement immediately on 
written notice by YAMANOUCHI to PDL if:
(a)     the Humanized Anti-gpllb/llla Antibody(ies) does 
not meet the Binding Affinity Requirement or come 
sufficiently close thereto for YAMANOUCHI to wish to further 
pursue this Agreement; or
(b)     the platelet aggregation inhibition activity of 
each Delivered Sample does not meet YAMANOUCHI's criteria 
for further development; or
(c)     the producer cell line delivered to YAMANOUCHI 
in accordance with Paragraph 5.2.3 does not have an 
expression level defined in Paragraph 5.2.4.

9.2.2   PDL may terminate this Agreement if YAMANOUCHI:
(a)     Is in default in payment of any payment or 
providing of reports; or
(b)     Is in breach of any provision hereof; or
(c)     Provides any materially false report; and 
YAMANOUCHI fails to remedy any such default, breach, or 
false report within thirty (30) days after written notice 
thereof by PDL.

9.2.3   Either party may terminate this Agreement, and the 
licenses granted herein if: (a) the other party becomes insolvent 
or enters in any arrangement or composition with creditors, or 
makes an assignment for the benefit of creditors; (b) there is a 
dissolution, liquidation or winding-up of the other party's 
business; or (c) a trustee in bankruptcy of the assets of the 
other party is appointed and such trustee does not, within thirty 
(30) days after receipt of written notice from the other party, 
confirm this Agreement and provide adequate assurance that the 
terms and conditions hereof shall faithfully be fulfilled.

9.2.4   The right of either party to terminate this Agreement 
as provided above shall not be affected in any way by its waiver 
of, or failure to take action with respect to, any previous 
failure to perform hereunder.

9.2.5   Surviving any termination or expiration of this 
Agreement are:
(a)     YAMANOUCHI's obligation to pay royalties or 
other fees accrued or accruable;
(b)     the confidentiality obligations under Article 8;
(c)     the indemnity provisions of Paragraph 7.3.

9.2.6   Upon termination other than expiration of this 
Agreement in accordance with Paragraph 9.1, PDL will return to 
YAMANOUCHI all biological material owned by YAMANOUCHI, YAMANOUCHI 
will return to PDL all biological material owned by PDL and all 
licenses and sublicenses will terminate.

10.     MISCELLANEOUS

10.1    Force Majeure.
  Neither party shall be responsible to the other for any failure 
or delay in performing any of its obligations under this Agreement or 
for other non-performance hereof provided that such delay or non-
performance is occasioned by a cause beyond the reasonable control and 
without fault or negligence of such party, including, but not limited to 
fire, flood, explosion, discontinuity in the supply of power, court 
order or governmental interference, act of God, strike or other labor 
trouble and provided that such party will immediately inform the other 
party and that it will entirely perform its obligations immediately 
after the relevant cause has ceased its effect.

10.2    Arbitration.
  Any controversy or claim arising out of or relating to this 
Agreement, or the breach thereof, which cannot be satisfactorily 
resolved by the parties by correspondence or mutual conference shall be 
determined by arbitration in Santa Clara, California, or such other 
venue as may be mutually agreed upon, under the then prevailing rules of 
the American Arbitration Association; provided however, that if any 
issue in dispute involves scientific or technical matters, the 
arbitrator(s) chosen shall have educational training and/or experience 
sufficient to demonstrate a reasonable level of knowledge in the field 
of biotechnology.  The decision of the arbitrators shall be final and 
binding and any party may apply for judgment upon the award rendered by 
the arbitrator(s) in a court having jurisdiction thereover.

10.3    Notices.
  All notices, documents, statements, reports and other writings 
required or permitted to be given by the terms of this Agreement shall 
be sent either by pre-paid, registered or certified mail, telegram, 
telecopier or telex, addressed as follows:

To PDL: Protein Design Labs, Inc. 
        2375 Garcia Avenue 
        Mountain View, CA 94043 
        USA

        Attention:  President

with a copy to: Marta L. Morando
        Ware & Freidenrich
        400 Hamilton Avenue
        Palo Alto, CA 94301
        USA

TO YAMANOUCHI:  Yamanouchi Pharmaceutical Company 
        No. 1-8 Azusawa 1-chome 
        Itabashi-ku, Tokyo 174 
        Japan
        Attention:  
        Hiroshi Gushima, Ph.D.
        Director of Molecular Biology Dept.,
        Biomedical Research Labs 11,
        Central Research Labs

Each party may change its address upon written notice to the other party 
and each notice shall be deemed to be given upon receipt.

10.4    Governing Law.
  This Agreement shall be subject to the laws of California, 
United States of America.

10.5    Entire Agreement.
  This Agreement embodies the entire understanding of the parties 
relating to the subject matter hereof and supersedes all prior 
understandings and agreements except that certain Confidentiality 
Agreement dated November 1, 1990 which shall continue to govern any 
Confidential Information shared other than pursuant to this Agreement.  
No modification or amendment of this Agreement shall be valid or binding 
except by a writing signed by each of the parties.

10.6    Assignment.
  This Agreement may not be assigned except (a) with the advance 
written consent of the other party, which consent shall not be 
unreasonably withheld, or (b) as part of a sale or transfer of 
substantially the entire business relating to operations pursuant to 
this Agreement.

10.7    Counterparts.
  This Agreement may be executed in any number of counterparts, 
each of which shall be deemed to be an original, and such counterparts together 
shall constitute one agreement.

IN WITNESS WHEREOF, the parties hereto have duly executed this 
Development and License Agreement in duplicate originals by their duly-
authorized officers or representatives.

PROTEIN DESIGN LABS, INC.
YAMANOUCHI PHARMACEUTICAL CO., LTD.


By: /s/ Laurence Jay Korn
By: /s/Moriyoshi Inubai


Title: President
Title:  Director of Central Research Laboratories


                               EXHIBIT A

Methods for the binding assay of anti-GPllb/llla antibodies

Iodination of antibodies

Antibodies (lgG whole molecule, F(ab')2 and Fab fragment) were iodinated 
using chrolamine T.  One hundred m Ci of 125I were incubated with the 
antibodies (15m g of 1gG. 10m g of F(ab')2, 5m g of Fab') for 4 min. in the 
presence of 1 m g of chrolamine T.  Free 125I was separated from the antibody 
on a Sephadex G-25 column.  3-15 m Ci of 125I were incorporated into 1 m g of 
protein corresponding to 1000 - 2000 cpm/fmole protein.

Platelet preparation

Platelete-rich plasma (PRP) was prepared by differential centriguation 
of anti-coagulated blood from a normal donor.  Platelets were washed three 
times with modified Tyrode's buffer (0.13M NaC1, 2.6mM KC1,  0.4mM NaH2P04,  
12mM NaHCO3,  5.5mM glucose, 2% bovine serum albumin, pH 7.4) containing lmM 
EDTA.  Washed platelets (WP) were used for the binding experiment of 
antibodies.

For the antibody binding assay of stimulated platelets, ADP (final 
concentration: 10 m M) or thrombin (final concentration: 0.3U/ml) was added 
together with CaC12 (1mM final) just before or after the addition of the 
radio-labelled antibody.

Antibody binding assay

Washed platelets (3 x 106 platelets/tube for antibody B,  1-3 x 107 
platelets/tube for antibody C) were incubated with constant amount (100pM) of 
125I-labelled antibody in the presence or absence of various amounts of 
unlabelled antibody, for 1hr at room temperature.  Platelets and antibodies 
were diluted with modified Tyrode's buffer without EDTA and total volume of 
the assay mixture was adjusted to 500 ml.  Incubation was stopped by adding 2 
ml of ice-cold buffer and free antibody was separated from bound antibody by 
the centrifugation for 10 min. at 3000rpm.  Tubes were then counted in a gamma 
counter.

Nonspecific binding was determined by adding 1300 fold-excess (10 m g) 
cold antibody before adding the labelled antibody.
Dessociation constants(Xd) and No. of binding sites (Bmax) were 
determined by Scatchard plot analysis.
Fibrinogen binding assay

Human fibrinogen (Sigma, F4883) was iodinated as described above except 
that 300 m g of fibrinogen were used, resulting in specific radioactivityi at 
0.02 m Ci/m g.  ADP-stimulated platelets (3 x 107/tube) were incubated with 
125I-fibrinogen (1 m g) in the presence or absence of increasing amounts of 
cold [illegible].

Platelet Preparation

Platelet-rich plasma (PRP) was obtained by centrifugation of the 
citrated blood at 110 X g for 10 minutes at room temperature.  After removal 
of PRP, the remaining sample was centrifuged at 1500 X g for 15 minutes to 
obtain platelet poor plasma (PPP).  Platelet counts in PRP were determined by 
hemocytometery and adjusted to a final concentration of 3X103/ml with 
autologous PPP.

Platelet Aggregometry

A 200 ul aliquot of PRP was warmed to 37 C in a silanized cuvette and 
stirred continuously at 1200 rpm in an aggregometer HEMA TRACER (Niko 
Bioscience Co., Ltd.).  After equilibration for 1 min. ADP (Sigma Chemical 
Co.) at a final concentration of 20 uM or 2 uM or bovine tendon collagen 
(Sigma Chemical Co.) at a final concentration of 20 ug/ml was added and 
aggregation was recorded as an increase in light transmission, with that of 
PRP and PPP representing 0% and 100% transmission, respectively.  For 
deaggregation experiments, 1gG or its fragments, or an equivalent volume of 
Tris-Buffered Saline (TBS) was added as light transmission approached a 
maximum and at selected later time intervals.  Deaggregation (inhibition of 
aggregation) was assessed as the decrease in light transmission measured 5 
minutes after addition of sample or saline as expressed as a percentage of the 
maximal light transmission.
Platelet studies were completed within 3 hours after blood collection.




CONFIDENTIAL TREATMENT REQUESTED

                                Amendment No. 1
                                    to the
                               February 12, 1991
                         Development and License Agreement
                                   between
                            Protein Design Labs, Inc.
                                    and
                        Yamanouchi Pharmaceutical Co., Ltd.


Effective March 27, 1991 ("Effective Date"), PROTEIN DESIGN LABS, INC., 
a Delaware corporation having offices at 2375 Garcia Avenue, Mountain View, CA  
94043 USA ("PDL") and YAMANOUCHI PHARMACEUTICAL CO., LTD., a Japanese 
corporation having offices at No. 1-8 Azusawa 1-chome, Itabashi-ku, Tokyo 174 
Japan ("YAMANOUCHI") agree as follows:

1.      BACKROUND

1.1     PDL and YAMANOUCHI are parties to a February 12, 1991 
Development and License Agreement covering humanized monoclonal 
antibodies against gpllb/llla ("Original Agreement").

1.2     PDL and YAMANOUCHI wish to amend Original Agreement to 
clarify each party's obligations with respect to non-U.S. withholding 
taxes.

1.3     In addition, PDL and YAMANOUCHI wish to correct certain 
typographical errors.

2.      AMENDMENT

2.1     The last sentence of Paragraph 6.1 of Original Agreement is 
deleted and the following sentence added to Paragraph 6.1:
All payments to PDL shall be in U.S. Dollars.

2.2     Paragraphs 6.1.1, 6.1.2 and 6.1.3 are added as follows:

6.1.1   The Development and License issue fee, all Benchmark 
Payments and all Exclusive Period maintenance fees shall be 
remitted to PDL in full without deducting any Japanese 
withholding taxes and PDL agrees to return to YAMANOUCHI 
amounts, if any, that represent an actual reduction in PDL 
U.S. taxes permanently realized as a result of taxes paid in 
Japan by YAMANOUCHI on behalf of PDL.  YAMANOUCHI shall 
provide copies to PDL of all tax receipts for taxes paid in 
Japan by YAMANOUCHI or other company(ies) defined in 
Paragraph 4.7 on behalf of PDL.

6.1.2   Earned royalty payments remitted to PDL under 
Paragraph 5.3 shall be reduced by the amount of all non-U.S. 
withholding taxes paid by YAMANOUCHI or other company(ies) 
defined in Paragraph 4.7 on behalf of PDL.  PDL is not 
required to return recovered U.S. taxes realized as a result 
of taxes paid in other countries than the U.S.A., if any.  
Notwithstanding the foregoing:
a)      in the case of sales made into Japan, earned 
royalty payments remitted to PDL shall not be below [   
];
b)      in the case of sales made into the United 
States, earned royalty payments remitted to PDL shall 
not be below [   ] and
c)      in the case of sales made into countries other 
than Japan or the United States, earned royalty 
payments remitted to PDL shall not be below [   ].
YAMANOUCHI shall provide copies to PDL of all tax receipts 
for taxes paid, if any, by YAMANOUCHI or other company(ies) 
defined in Paragraph 4.7 on behalf of PDL.

6.1.3   earned royalties remitted to third parties under 
Paragraph 5.4 shall be paid in full without deducting any 
withholding taxes unless otherwise agreed upon with such 
third parties.  In no event shall PDL's earned royalty 
payments remitted to PDL after deductions permitted by 
Paragraph 5.4 be less than [   ].

2.3     The last sentence of Paragraph 6.3 is deleted and the 
following sentence substituted in its place:
All payments to PDL shall be in U.S. Dollars.

2.4     Paragraph 5.2.4 is amended to change "mg" to "ug":

CONFIDENTIAL TREATMENT REQUESTED
[   ] mg/106cells/ml/24 hours, if producing humanized anti-
gpllb/llla intact antibody;
the molar eqivalent of [   ]mg/106 cells/ml/24 hours intact 
antibody, if producing F(ab')2;
the molar equivalent of [   ]mg/106 cells/ml/24 hours intact 
antibody, of producing Fab.

2.5     All other provisions of Original Agreement remain in full 
force and effect.

IN WITNESS WHEREOF, the parties hereto have executed this Amendment in 
duplicate originals.
PROTEIN DESIGN LABS, INC.
YAMANOUCHI PHARMACEUTICAL CO., LTD.


By:  /s/ Laurence Jay Korn
By: /s/ Moriyoshi Inubai


 Title:  President
 Title:  Director of Central Research Laboratories