[*] indicates that a confidential portion of the text of this agreement has been
omitted and filed separately with the Securities and Exchange Commission.

                              AMENDED AND RESTATED
                         RESEARCH AND LICENSE AGREEMENT
                                     BETWEEN
                                XOMA CORPORATION
                                       AND
                               NEW YORK UNIVERSITY




                                    NYU/XOMA
                              AMENDED AND RESTATED
                         RESEARCH AND LICENSE AGREEMENT



                                                      I N D E X
                                                                                           
Section l.                 Definitions                                                           page 3

Section 2.                 Effective Date                                                        page 10

Section 3.                 Performance of the NYU Research Project                               page 10

Section 4.                 Funding of the NYU Research Protect                                   page 12

Section 5.                 Title                                                                 page 13

Section 6.                 Patents and Patent Applications                                       page 14

Section 7.                 Grant of License                                                      page 16

Section 8.                 Development and Commercialization                                     page 18

Section 9.                 Payments for License                                                  page 20

Section 10.                Method of Payment                                                     page 27

Section 11.                Publication                                                           page 28

Section 12.                Infringement of NYU Patent                                            page 29

Section 13.                Term and Termination                                                  page 33

Section 14.                CORPORATION's Contingent
                           Right to Royalties                                                    page 34

Section 15.                CORPORATION's Indemnification                                         page 35

Section 16.                Security for Indemnification                                          page 36

Section 17.                Confidential Information                                              page 40

Section 18.                Representations and Covenants                                         page 41

Section 19.                No Assignment                                                         page 42

Section 20.                Use of Name                                                           page 43

Section 21.                Miscellaneous                                                         page 44


         Appendix I - Pre-Existing Inventions

         Appendix II - Research Project

         Appendix III - Development Plan

         Appendix IV - Schedule of Research Payments



                                    NYU/XOMA
                         RESEARCH AND LICENSE AGREEMENT

     This Agreement, dated as of September 1, 1993, is by and between:

     NEW YORK UNIVERSITY a corporation organized and existing under the laws of
the State of New York and having a place of business at 70 Washington Square
South, New York, New York 10012 (hereinafter "NYU")

                                      AND

     XOMA Corporation a corporation organized and existing under the laws of the
State of Delaware having its principal office at 2910 Seventh Street, Berkeley,
California 94710 (hereinafter "CORPORATION").

                                   WITNESSETH:

     WHEREAS, CORPORATION and NYU are parties to that certain Agreement dated
August 6, 1990 ("the Original Agreement") and each of them desires to amend and
restate the Original Agreement in its entirety;

     NOW, THEREFORE, in consideration of the mutual promises and agreements
contained herein, CORPORATION and NUY mutually covenant and agree that the terms
of the Original Agreement shall be cancelled and that, effective August 6, 1990
("the Effective Date") the following recitals and terms shall be substituted
therefore:

                                       -1-

                                    RECITALS

     WHEREAS, Drs. Peter Elsbach and Jerrold Weiss of NYU (hereinafter "the NYU
Scientists") have made certain inventions relating to Bactericidal/Permeability
Increasing Protein (hereinafter "the BPI Pre-Existing Inventions"), and also
certain inventions relating to 15KD proteins purified from mammalian
polymorphonuclear leukocytes and having anti-bacterial or lipopolysaccharide
neutralizing properties ("the P15 Pre-Existing Inventions") all as more
particularly described in pending U.S. patent application and counterpart
foreign patent applications owned by NYU, identified, respectively, in annexed
Appendix I and Appendix II forming an integral part hereof;

     WHEREAS, NYU is willing to perform the NYU Research Project (as hereinafter
defined);

     WHEREAS,  CORPORATION  is prepared to sponsor the NYU Research  Project (as
hereinafter defined) at the facilities of NYU;

     WHEREAS, subject to the terms and conditions hereinafter set forth, NYU is
willing to grant to CORPORATION and CORPORATION is willing to accept from NYU a
license to use and practice the Research Technology (as hereinafter defined) for
the manufacturing and marketing of the Licensed Products (as hereinafter
defined);

     NOW,  THEREFORE,  IT IS HEREBY  DECLARED AND AGREED  BETWEEN THE PARTIES AS
FOLLOWS:

                                       -2-

1.   Definitions.

     Whenever used in this Agreement, the following terms shall have the
     following meanings:

     a.   "Affiliate" shall mean any company or other legal entity which
          controls, or is controlled by, or is under common control with, a
          sublicensee of CORPORATION; control means the holding of fifty and one
          tenth percent (50.1%) or more of (i) the capital and/or (ii) the
          voting rights and/or (iii) the right to elect or appoint directors or
          such lower maximum amount allowed by the law governing the ownership
          of said organization.

     b.   "Agreement Year" shall mean any consecutive period of twelve months
          commencing on the Effective Date or an annual anniversary of the
          Effective Date.

     c.   "BPI"  shall  mean   Bactericidal/Permeability   Increasing   protein,
          purified from mammalian polymorphonuclear leukocytes.

     d.   "BPI Biological Material" shall mean the cDNA encoding for human BPI
          that NYU has in its possession on the Effective Date.

     e.   "BPI Products" shall mean:





                                       [*]

                                       -3-

                                       [*]
                                       -4-

                                       [*]

     f.   "BPI Combination Product" shall mean a product comprising a BPI
          Product(s) and at least one other ingredient which is therapeutically
          or prophylactically active.

     g.   "CORPORATION Entity" shall mean any company or other legal entity
          which controls, or is controlled by, or is under common control with,
          CORPORATION; control means the holding of fifty and one tenth percent
          (50.1%) or more of (i) the capital and/or (ii) the voting rights
          and/or (iii) the right to elect or appoint directors or such lower
          maximum amount allowed by the law governing the ownership of said
          organization.

     h.   "CORPORATION PATENTS" shall mean all United States and foreign patents
          and reissues, renewals and extensions thereof, and patent
          applications, and any divisions, continuations, in whole or in part
          therefor, which name only employee(s) of CORPORATION and not any NYU
          employee as an inventor(s) thereon and relate to the BPI Products, as
          defined herein.

     i.   "Development Plan" shall mean the preclinical plan and estimated time
          frame for clinical program, through final approval by the United
          States Food and Drug Administration ("FDA") for the BPI Products, as
          set forth in Appendix III, attached hereto and made an integral part
          hereof.

                                       -5-

     j.   "JOINT  Patents" shall mean all United States and foreign  patents and
          reissues,  renewals and extensions thereof,  and patent  applications,
          and any divisions,  continuations, in whole or in part therefor, which
          name at least one employee of CORPORATION  and one employee or student
          of NYU as inventors  thereon and which  disclose and claim  inventions
          which are based on, use or comprise  biological  material  provided to
          CORPORATION  by NYU or disclosed in the NYU Patents or which relate to
          the BPI Products.

     k.   "License" shall mean the exclusive worldwide license to practice the
          Research Technology for the development, manufacture, use and sale of
          the Licensed Products.

     l.   "Licensed Product" shall mean (aa) any BPI Product; or (bb) any BPI
          Combination Product; or (cc) any P15 Product (as hereinafter defined);
          or (dd) any P15 Combination Product (as hereinafter defined). The
          production, use or sale of which is covered by a claim of any
          unexpired NYU Patent and/or JOINT Patent and/or CORPORATION Patent
          which has not been disclaimed or held invalid by a court of competent
          jurisdiction from which no appeal can be taken.

     m.   "Net Sales" shall mean the total amount invoiced in connection with
          sales of the Licensed Products, in any arm's length transaction, after
          deduction of all the following to the extent applicable to such sales;

                                       -6-

          i)   all  trade,  case and  quantity  credits,  discounts,  refunds or
               rebates;

          ii)  allowances or credits for returns;

          iii) sales commissions; and iv) sales taxes (including value added
               tax), provided that in respect of sales which are not "at arm's
               length" sales, the Net Sales shall be deemed to be the total
               sales price invoiced at the time of such sales for sales of
               Licensed Products which are "at arm's length" sales after the
               aforementioned deductions.


     n.   "NYU Know-How" shall mean the BPI and P15 Pre-Existing  Inventions and
          any information and materials,  including the BPI Biological  Material
          and the  P15  Biological  Material  and  also,  but  not  limited  to,
          pharmaceutical,   chemical,   biological  and  biochemical   products,
          information,  trade  secrets,  know-how,  technical and  non-technical
          data,  methods  and  processes  and  any  drawings,  plans,  diagrams,
          specifications  and/or other documents  containing  such  information,
          discovered,  developed  or acquired  by, or on behalf of,  students or
          employees of NYU during the Research Period (as  hereinafter  defined)
          and in the course of the NYU Research Project.

     o.   "NYU Patents" shall mean all United States and foreign patents and
          reissues, renewals and extensions thereof, and patent applications,
          and any divisions, continuations, in whole or in part, therefor:

                                       -7-

                    (1) which claim Pre-Existing Inventions and which are
               identified on annexed Appendix I; or

                    (2) which claim inventions that are made by students or
               employees of NYU during the term and in the course of the NYU
               Research Project.

     p.   "NYU Research Project" shall mean the investigations during the
          Research Period (as hereinafter defined) into the field of BPI and P15
          (as hereinafter defined) under the supervision of the NYU Scientists
          at NYU in accordance with the research program, described in annexed
          Appendix III, which forms an integral part hereof.

     q.   "PLA" shall mean 15KD proteins purified from mammalian
          polymorphonuclear leukocytes and having anti-bacterial or
          lipopolysaccharide neutralizing properties.

     r.   "P15 Products" shall mean:

                                      [*]

                                       -8-

                           [*]
                  s. "P15 Biological Material" shall mean the encoding for
                  mammalian P15s that NYU had in its possession on September 1,
                  1993. t. "P15 Combination Product" shall mean a product
                  comprising a P15 Product(s) and at least one other ingredient
                  which is therapeutically or prophylactically active.

                                       -9-

     u.   "PLA" shall mean a product license application filed with the FDA with
          respect to any BPI Product or P15 Product.

     v.   "Research Period" shall mean the six (6) year period commencing upon
          the Effective Date and any extension thereof as to which NYU and
          CORPORATION shall mutually agree in writing.

     w.   "Research Technology" shall mean all NYU Patents and NYU Know-How and
          NYU's interest in JOINT Patents.

2.   Effective Date.

     This Agreement shall be effective as of August 6, 1990 (the "Effective
     Date") and shall remain in full force and effect until it expires or is
     terminated in accordance with Section 13 or Sections 8.e. or 9.f. hereof.

3.   Performance of the NYU Research Project.

     a.   In consideration of the sums to be paid to NYU as set forth in Section
          4 below,  NYU  undertakes  to perform the NYU Research  Project at NYU
          under the  supervision  of the NYU  Scientists  during  the three year
          period  commencing on the Effective Date,  (hereinafter  "the Research
          Period").  If,  during the Research  Period all of the NYU  Scientists
          shall cease to  supervise  the NYU  Research  Project,  then NYU shall
          provide notice to CORPORATION of such occurrence and shall endeavor to
          find from  among  the  scientists  of NYU a  scientist  or  scientists
          acceptable  to  CORPORATION  to continue  the  supervision  of the NYU
          Research  Project in place of the NYU Scientists.  If NYU is unable to
          find such a scientist

                                      -10-

          acceptable to CORPORATION, which acceptance shall not unreasonably be
          withheld, within three months after such notice to CORPORATION,
          CORPORATION shall have the option to terminate its funding of the NYU,
          Research Project. CORPORATION shall promptly advise NYU in writing if
          CORPORATION so elects. Such termination of funding pursuant to this
          Section 3.a. shall not terminate this Agreement or the License granted
          herein. Nothing herein contained, however, shall be deemed to impose
          an obligation on NYU to find a replacement for the NYU Scientists.

     b.   Nothing contained in this Agreement shall be construed as a warranty
          on the part of NYU that any results or inventions will be achieved by
          the NYU Research Project, or that the Research Technology and/or any
          other results or inventions achieved by the NYV Research Protect, if
          any, are or will be commercially exploitable and furthermore, NYU
          makes no warranties whatsoever as to the commercial or scientific
          value of the Research Technology.

     c.   Within sixty (60) days after each six months of the Research Period,
          NYU shall prepare a written report summarizing the results of the work
          conducted on the NYU Research Project during the preceding period. 

     d.   NYU will have full authority and responsibility for the NYU Research
          Project. All students and employees of NYU who work on the NYU
          Research Project will do so as employees or students of NYU, and not
          as employees of CORPORATION.

                                      -11-

     e.   Within seven (7) days after the Effective Date, NYV shall deliver to
          CORPORATION a sample of the Biological Material. CORPORATION shall use
          such Biological Material solely for performance of the CORPORATION's
          research and development obligations pursuant to Section 8 hereof, and
          CORPORATION shall not distribute or disclose the Biological Material
          to any person or entity outside CORPORATION without the prior written
          permission of NYU.

4. Funding of the NYU Research Project.

     a.   As compensation to NYU for work performed on the NYU Research  Project
          during the Research Period,  CORPORATION  shall pay NYU a total of [*]
          payable in accordance with the Schedule  annexed hereto as Appendix V,
          which is an integral part of this Agreement.  NYU acknowledges that as
          of September 1, 1993,  CORPORATION has paid NYU [*] of such amount. 

     b.   Nothing in this Agreement shall be interpreted to prohibit NYU (or
          the NYU Scientists) from obtaining additional financing or research
          grants for the NYU Research Project from government agencies, which
          grants or financing may render all or part of the NYU Research Project
          and the results thereof subject to the patent rights of the U.S.
          government and its agencies, as set forth in Title 35 U.S.C. ss.200 et
          seq., and from non-commercial third parties, provided, however, that
          such grants 



                                      -12-


          shall not give such non-commercial third parties any rights to the
          results, use and/or commercialization of such research.

5.   Title.

     a.   Subject to the License  granted to  CORPORATION  hereunder  and to the
          rights of the United  States  Government  pursuant  to Title 35 of the
          U.S.C. ss.200 et. sec. and 15 CFR ss.368 et. seq., it is hereby agreed
          that all right, title and interest, in and to the Research Technology,
          and in and to any drawings, plans, diagrams, specifications, and other
          documents  containing any of the Research Technology shall vest solely
          in NYU. At the request of NYU, CORPORATION shall take all steps as may
          be necessary to give full effect to said right,  title and interest of
          NYU including, but not limited to, the execution of any documents that
          may be  required to record such  right,  title and  interest  with the
          appropriate  agency or government  office.  If CORPORATION  determines
          that a waiver is necessary  with  respect to the Research  Technology,
          from the United States Government, CORPORATION shall so notify NYU and
          NYU shall assist  CORPORATION in applying for such waiver.

     b.   Title to JOINT Patents shall vest jointly in NYU and CORPORATION,
          except as otherwise provided herein.

     c.   NYU and CORPORATION acknowledge that there is a possibility Genentech
          or an assignee thereof might claim certain rights to and/or interest
          in the BPI Pre-Existing Inventions.

                                      -13-

6.   Patents and Patent Applications.

     a.   CORPORATION has paid NYU the sum of U.S. [*] being the amount of all
          costs and fees incurred by NYU up to the Effective Date in connection
          with the patent applications identified in Appendix I hereto. Within
          thirty (3) days of final execution of this Agreement, CORPORATION
          shall pay NYU the sum of [*], being the amount of all costs and fees
          incurred by NYU after the Effective Date and with respect to the
          patent applications identified in Appendix II hereof.

     b.   NYU shall promptly disclose to CORPORATION in writing all inventions
          which comprise potential NYU Patents or JOINT Patents. CORPORATION
          shall promptly disclose to NYU in writing all inventions which
          comprise potential JOINT Patents or CORPORATION Patents.

     c.   At the initiative of CORPORATION or NYU, the parties shall consult
          with each other regarding the filing of patent applications in respect
          of any inventions which comprise potential NYU Patents or JOINT
          Patents, including but without limitation, the timing of the filing of
          such applications, the jurisdiction within which foreign counterparts
          of such applications should be filed and other details pertaining to
          the prosecution and maintenance of patent rights.

     d.   NYU and CORPORATION will negotiate in good faith to select patent
          counsel mutually acceptable to NYU and CORPORATION.

                                      -14-

          NYU and CORPORATION will file, prosecute and maintain through such
          patent counsel and in countries selected by NYU and CORPORATION,
          patent applications on any inventions which comprise potential JOINT
          Patents. NYU and CORPORATION shall each be solely responsible for the
          filing, prosecution and maintenance of NYU Patents and CORPORATION
          Patents respectively.

     e.   NYU and CORPORATION shall assist, and cause their respective employees
          and consultants to assist each other, in assembling inventorship
          information and data for the filing and prosecution of patent
          applications on inventions which comprise potential NYU Patents or
          JOINT Patents.

     f.   All NYU Patents and JOINT Patents shall be filed, prosecuted and
          maintained at the expense of CORPORATION.

     g.   If at any time during the term of this Agreement  CORPORATION  decides
          that it is  undesirable as to one or more  countries,  to prosecute or
          maintain  any  potential  or  issued  NYU  Patents  or JOINT  Patents,
          CORPORATION  shall give prompt written notice thereof to NYU, and upon
          receipt  of  such  notice  CORPORATION  shall  be  released  from  its
          obligation to bear all of the expense to be incurred  thereafter as to
          such   countries  in   conjunction   with  such  patent(s)  or  patent
          application(s), and NYU shall have the right to prosecute and maintain
          such patents at NYU's sole expense.

     h.   Nothing herein contained shall be deemed to be a warranty by NYU that

                                      -15-

               i) NYU can or will be able to obtain any patent or patents on any
          patent application or applications in the NYU Patents or any portion
          thereof, or that any of the NYU Patents will afford adequate or
          commercially worthwhile protection, or

               ii) that the manufacture, use, or sale of any element of the
          Research Technology or any Licensed Product will not infringe any
          patent(s) of a third party.

7.   Grant of License.

     a.   Subject to the terms and conditions hereinafter set forth, and subject
          to any rights of the United States Government pursuant to Title 35 of
          the United States Code ss.200 et seq., NYU hereby grants to
          CORPORATION and CORPORATION hereby accepts from NYU the License.

     b.   The period of the License shall be determined on a  country-by-country
          basis and on a Licensed Product-by-Licensed Product basis and shall be
          for the longer of (i) fifteen (15) years after first  commercial  sale
          after regulatory  approval in such country of the respective  Licensed
          Product by CORPORATION, or CORPORATION's  sublicensees,  or (ii) until
          the last to expire of the NYU  Patents  or the JOINT  Patents  in such
          country,  and, thereafter,  in the case of (i) or (ii),  CORPORATION's
          license

                                      -16-

          hereunder with respect to the Licensed Product shall be a fully
          paid-up irrevocable license without payment of additional royalties.
          The CORPORATION shall inform NYU in writing of the date of first
          commercial sale after regulatory approval of each Licensed Product in
          each such country as soon as practicable after the making of such
          commercial sale.

     c.   CORPORATION  shall be entitled to grant  sublicenses under the License
          on terms and  conditions in compliance and not  inconsistent  with the
          terms and conditions of this Agreement (i) to a CORPORATION  Entity or
          (ii) to other third parties for  consideration  and in an  arms-length
          transaction.  All  sublicenses  shall only be  granted by  CORPORATION
          under a written  agreement,  a copy of which,  with certain  financial
          terms  deleted,  shall be submitted by  CORPORATION  to NYU as soon as
          practicable  after the signing  thereof.  Each  sublicense  granted by
          CORPORATION  hereunder  shall be subject and  subordinate to the terms
          and  conditions of this Agreement and shall contain  (inter-alia)  the
          following provisions:

               (1) the sublicense shall expire automatically on the termination
          of the License; provided, however that upon such termination, the
          sublicensee shall have the right to enter into a licensing agreement
          with NYU upon the same terms and conditions as in this Agreement.

               (2) the sublicense  shall not be assignable,  in whole or in part
          except to an Affiliate of the sublicensee;

                                      -17-

               (3) the sublicensee shall not grant further sublicenses except to
          an Affiliate of the sublicensee; and

               (4) both during the term of the sublicense and thereafter the
          sublicensee shall be bound by a secrecy obligation similar to that
          imposed on CORPORATION in Section 17 below, and that the sublicensee
          shall bind its employees, both during the terms of their employment
          and thereafter, with a similar undertaking of secrecy.

               (5) the sublicense agreement shall include the text of Section 15
          and 16 of this Agreement and shall state that NYU is an intended third
          party beneficiary of such sublicense agreement for purposes of
          enforcing such indemnification and insurance provisions.

8.   Development and Commercialization.

     a.   CORPORATION  undertakes to use  reasonable  diligence to carry out the
          Development Plan, including but not limited to, the performance of all
          efficacy,  pharmaceutical,  safety,  toxicological and clinical tests,
          trials and  studies  and all other  activities  necessary  in order to
          obtain the approval of the FDA for the production, use and sale of the
          Licensed Products, all as set forth in the Development Plan and within
          all timetables set forth therein.  CORPORATION  further  undertakes to
          exercise  due  diligence  and to employ its  reasonable  diligence  to
          obtain or to

                                      -18-

          cause its sublicensees to obtain, the appropriate approvals of the
          health authorities for the production, use and sale of the Licensed
          Products, in each of the other countries of the world in which
          CORPORATION or its sublicensees intend to produce, use, and/or sell
          Licensed Products.

     b.   Provided that applicable laws, rules and regulations  require that the
          performance  of  the  tests,  trials,  studies  and  other  activities
          specified in  subsection  a. above shall be carried out in  accordance
          with FDA Good Laboratory  Practices and in a manner  acceptable to the
          relevant health  authorities,  CORPORATION shall carry out such tests,
          trials,  studies  and other  activities  in  accordance  with FDA Good
          Laboratory Practices and in a manner acceptable to the relevant health
          authorities.  Furthermore,  the Licensed Products shall be produced in
          accordance with FDA Good Manufacturing  Practice ("GMP") procedures in
          a facility  which has been certified by the FDA as complying with GMP,
          provided that applicable laws, rules and regulations so require.

     c.   CORPORATION undertakes to begin the regular commercial production,
          use, and sale of the Licensed Products in good faith in accordance
          with the Development Plan and to continue diligently thereafter to
          commercialize the Licensed Products.

     d.   CORPORATION shall provide NYU with written reports on all activities
          and actions undertaken by CORPORATION to develop and commercialize the
          Licensed Products; such reports shall be made

                                      -19-

          within sixty (60) days after each six (6) months of the duration of
          this Agreement, commencing six months after the Effective Date.

     e.   If CORPORATION  shall not commercialize the Licensed Products within a
          reasonable  time frame,  unless such delay is  necessitated  by FDA or
          other regulatory  agencies or unless NYU and CORPORATION have mutually
          agreed  to  amend  the   Development   Plan   because  of   unforeseen
          circumstances,   NYU  shall   notify   CORPORATION   in   writing   of
          CORPORATION's  failure to  commercialize  and shall allow  CORPORATION
          sixty (60) days to cure its failure to  commercialize.  If CORPORATION
          falls to cure such delay to NYU's reasonable  satisfaction,  NYU shall
          have the right,  upon written notice to  CORPORATION,  solely at NYU's
          discretion,  either to  terminate  this  Agreement  or to convert  the
          License granted herein to a non-exclusive license.

     f.   CORPORATION shall deliver to NYU a sample of each BPI Product
          developed by CORPORATION promptly after its development. NYU shall use
          such samples only for research purposes and shall not give them to
          others, unless and until such BPI Products are in the public domain or
          unless authorized by CORPORATION in writing.

9.   Payments for License.

     a.   In consideration for the grant of the License  hereunder,  CORPORATION
          shall pay to NYU

                                      -20-




          (1)  A non-refundable, non-creditable license issue fee of [*] payable
               as follows: [*] on the date that is twenty-four months after the
               Effective Date or upon CORPORATION's first filing of an
               Investigational New Drug ("IND") in the United States with
               respect to the Licensed Products, whichever is earlier; and

          (2)  Non-refundable, milestone payments as follows: [*], which amount
               shall not be creditable against further royalties otherwise
               payable to NYU; and, on [*] of which amount shall be creditable
               against future royalties otherwise payable to NYU; and

          (3)  a royalty of [*] of the Net Sales of any Licensed Product sold by
               CORPORATION or its sublicensees (including CORPORATION Entity)
               for as long as CORPORATION maintains the License except as
               follows in i) and ii) below:

                    (i) If a Licensed Product described in Section 1.1.(aa) or
               (bb) is covered solely by an NYU Patent having

                                      -21-

               claims directed to the cDNA as described in subparagraph l.e.(iv)
               then the royalty owed by CORPORATION shall be reduced by [*].

                    (ii) If a Licensed Product described in Section 1.1.(aa) or
               (bb) is covered solely by an NYU Patent having claims directed to
               the cDNA as described in subparagraph l.e.(i)(4) and a third
               party is producing and selling a BPI Product by a manufacturing
               process using means other than such claimed cDNA then CORPORATION
               shall have no royalty obligation with respect to such Licensed
               Product.

          (4)  a royalty of [*] of the Net Sales of any Licensed Product
               described in Section 1.1.(cc) or (dd) and sold by COPORATION or
               its sublicensees (including CORPORATION Entity) for as long as
               CORPORATION maintains the License except as follows in i) and ii)
               below:

               (i)  If a Licensed Product in Section 1.1.(cc) or (dd) is covered
                    solely by a CORPORATION Patent having claims directed to the
                    cDNA as described in Section 1.r.(i)(4) then the royalty
                    owed by the CORPORATION to NYU shall be reduced by [*].

               (ii) If a Licensed Product in Section 1.1.(cc) or (dd) is covered
                    solely by an NYU Patent having claims directed to the cDNA
                    as described in Section 1.r.(i)(4) and a third party is
                    producing and selling a P15 Product by a manufacturing
                    process using means other than such

                                      -22-

                    claimed cDNA then CORPORATION shall have [*] with respect to
                    such Licensed Product.

          (5)  If any Licensed Product is covered solely by a CORPORATION Patent
               then the royalty owed by the CORPORATION to NYU with respect to
               such Licensed Product shall be [*] of the Net Sales of such
               Licensed Product sold by CORPORATION or its sublicensees
               (including CORPORATION Entity) for as long as CORPORATION
               maintains the License.

     b.   For the purpose of computing the royalties due to NYU  hereunder,  the
          year shall be divided  into two parts  ending on June 30 and  December
          31.  CORPORATION  shall,  within  forty-five (45) days from the end of
          each  December and June in each  calendar  year during the term of the
          License,  submit to NYU a full and  detailed  report of  royalties  or
          payments due NYU under the terms of this  Agreement  for the preceding
          half year  (hereinafter  "the  Part-Year  Report"),  setting forth the
          following:

          i)   gross sales of Licensed Products and Combination Products,  i.e.,
               the amount invoiced prior to any deductions,

          ii)  the deductions  permitted under  subsection 1.m. hereof to arrive
               at Net Sales, and

          iii) the royalty computations and subject of payment.

          In determining Net Sales of Combination Products, Net Sales will be
          multiplied by the percent value of BPI Product and/or the P15

                                      -23-

          Product contained in the Combination Product. Such percent value being
          the quotient obtained by dividing the costs of manufacturing the BPI
          Product and/or the P15 Product by the sum of the cost of the
          manufacturing of the BPI Product and/or the P15 Product plus other
          biologically active ingredients. All such costs of manufacturing shall
          be calculated in accordance with generally accepted accounting
          practices and audited by an independent certified public accountant.
          If no royalties are due, a statement shall be sent to NYU stating such
          fact. The full amount of any royalties or other payments due to NYU
          for the preceding part of the year shall accompany each such report on
          royalties and payments. CORPORATION shall keep and shall cause its
          sublicensees to keep for a period of at least three (3) years after
          the date of entry, full, accurate and complete books and records
          consistent with sound business and accounting practices and in such
          form and in such detail as to enable the determination of the amounts
          due to NYU from CORPORATION pursuant to the terms of this Agreement.

     c.   On reasonable notice and during regular business hours, NYU shall have
          the right to have the books of accounts, records and other relevant
          documentation of CORPORATION or of Corporation Entity inspected by
          independent auditors as set forth herein. If NYU desires to perform
          such audit, NYU shall notify CORPORATION. Within fourteen (14) days
          after receipt of such notice, CORPORATION shall designate one of the
          "Big-6" accounting firms which does not have CORPORATION as a client

                                      -24-

          and shall notify NYU of CORPORATION's designation and NYU shall engage
          such accounting firm to perform such audit on NYU's behalf. If
          CORPORATION falls to notify NYU of such designated accounting firm
          within such fourteen day period, NYU shall have the right to select
          and engage any accounting firm to perform such audit on NYU's behalf.
          If errors of five percent (5%) or more in NYU's favor are discovered
          as a result of such examination, CORPORATION shall reimburse NYU for
          the expense of such examination. CORPORATION shall undertake to have
          sublicensees of CORPORATION provide audited reports to NYU; if any
          sublicensee does not provide such reports to NYU, CORPORATION shall
          have conducted, at no expense to NYU, an audit of such sublicensee's
          records with respect to the production, marketing and sale of Licensed
          Products and Combination Products every two years, commencing two
          years after the effective date of such sublicensee's agreement with
          CORPORATION.

     d.   If a patent license from a third party is necessary for the
          manufacture or sale of a Licensed Product or Combination Product,
          CORPORATION shall be entitled to deduct from royalties which would
          otherwise be due to NYU under Section 9.a.(3) and/or 9.a.(4) hereof,
          the amount of royalties which CORPORATION must pay to such third party
          for such license. This deduction, however, shall not exceed [*] of the
          royalties otherwise due under this Agreement.

                                      -25-

     e.   [*]

     f.   In the event that NYU exercises its right to convert the License
          granted herein to a non-exclusive license pursuant to Sections 8.e. or
          9.f., the parties shall negotiate in good faith a reduction of the
          royalties stated in Sections 9.a.(3), 9.a.(4) and 9.e., at a rate
          commensurate with a non-exclusive license effective prospectively from
          the date such negotiated reduction is reduced to writing and signed by
          both parties.

                                      -26-

     g.   In  the  event  the  License   granted   herein  is   converted  to  a
          non-exclusive  license  pursuant  to  Section  9.e.  and NYU  grants a
          nonexclusive  license to practice the Research  Technology  to a third
          party,  NYU  shall  advise  CORPORATION  as to those  terms  which are
          different in such other license  agreement(s),  whereupon  CORPORATION
          may determine whether such terms are more favorable than those granted
          to CORPORATION.  CORPORATION shall, at its election,  be entitled upon
          written notice to NYU to have this Agreement amended to substitute all
          terms of such more  favorable  license for all terms of this Agreement
          as of the date upon  which  such more  favorable  license  shall  have
          become effective.  Such amendment shall, as to royalty,  apply only to
          prospective royalties.

10. Method of Payment.

     a.   Royalties and any other payments due to NYU hereunder shall be paid to
          NYU in United States dollars. Any royalties and such payments that
          accrue in a foreign currency shall be converted into United States
          dollars based on the closing buying rate of the Morgan Guaranty Trust
          Company of New York applicable to transactions under exchange
          regulations for the particular currency on the last business day of
          the accounting period for which payment is due.

     b.   CORPORATION shall be responsible for payment to NYU of all royalties
          due on sale, transfer or disposition of Licensed Products by the
          sublicensees of CORPORATION.

                                      -27-




11.  Publication.

     a.   Prior to  submission of  publication  of a manuscript  describing  the
          results  of any  aspect of the NYU  Research  Project,  NYU shall send
          CORPORATION a copy of the manuscript to be submitted,  and shall allow
          CORPORATION  sixty  (60) days from the date of  receipt  to  determine
          whether the  manuscript  contains such subject matter for which patent
          protection  should be sought prior to publication of such  manuscript,
          for the purpose of protecting an invention  made by the NYU Scientists
          during the course  and  within the term of the NYU  Research  Protect.
          Should  CORPORATION  believe  the  subject  matter  of the  manuscript
          contains a patentable invention, then prior to the expiration of sixty
          (60) days from the receipt date of such  manuscript to  CORPORATION by
          NYU,  CORPORATION  shall  give  written  notification  to  NYU  of its
          determination that such manuscript  contains patentable subject matter
          for which patent protection should be sought.

     b.   After the expiration of sixty (60) days from the date of receipt such
          manuscript to CORPORATION, unless NYU has received the written notice
          specified above from CORPORATION, NYU shall be free to submit such
          manuscript for publication to publish the disclosed research results
          in any manner consistent with academic standards.

     c.   Upon  receipt  of such  written  notice  from  CORPORATION,  NYU  will
          thereafter delay submission of the manuscript for an

                                      -28-

          additional period of up to ninety (90) days to permit preparation and
          filing of U.S. patent application by NYU on the subject matter to be
          disclosed in such manuscript. After expiration of such 90-day period,
          or the filing of a patent application on each such invention,
          whichever shall occur first, NYU shall be free to submit the
          manuscript and to publish the disclosed results.

12.  Infringement of NYU Patent.

     a.   In the event a party to this Agreement acquires information that a
          third party is infringing one or more of the NYU Patents and/or the
          JOINT Patents and CORPORATION Patents, the party acquiring such
          information shall promptly notify the other party to the Agreement in
          writing of such infringement.

     b.   In the event of an  infringement  of the NYU Patents  and/or the JOINT
          Patents,  CORPORATION  shall be  privileged  but not required to bring
          suit against the  infringer,  and to join NYU as a party  plaintiff in
          such suit. Should CORPORATION elect to bring suit against an infringer
          and NYU is joined as a party  plaintiff  in any such  suit,  NYU shall
          have the right to approve  the  counsel  selected  by  CORPORATION  to
          represent  CORPORATION.  The  expenses  of  such  suit or  suits  that
          CORPORATION elects to bring, including any expenses of NYU incurred in
          conjunction  with  the  prosecution  of such  suit  or the  settlement
          thereof,  shall be paid for entirely by  CORPORATION  and  CORPORATION
          shall hold NYU

                                      -29-

          free, clear and harmless from and against any and all costs of such
          litigation, including attorneys' fees. CORPORATION shall not
          compromise or settle such litigation in which NYU is joined as a party
          plaintiff without the prior written consent of NYU which shall not be
          unreasonably withheld.

     c.   In the event CORPORATION  exercises the right to sue herein conferred,
          it shall  have the  right to first  reimburse  itself  out of any sums
          recovered  in such  suit or in  settlement  thereof  for all costs and
          expenses of every kind and character,  including reasonable attorneys'
          fees, necessarily involved in the prosecution of any such suit, and if
          after such  reimbursement,  any funds shall remain from said recovery,
          CORPORATION shall promptly pay to NYU an amount equal to fifty percent
          (50%) of such remainder and  CORPORATION  shall be entitled to receive
          and  retain  the  balance  of  the  remainder  of  such  recovery.  If
          CORPORATION  is not fully  reimbursed  for the costs and  expenses  of
          litigation  from said  recovery,  CORPORATION  shall have the right to
          deduct from  royalties  otherwise due to NYU, an amount equal to fifty
          percent  (50%) of such  unreimbursed  costs  and  expenses,  provided,
          however,  that such deduction  when combined with any other  deduction
          against  royalties  permitted under this  Agreement,  shall not at any
          time exceed fifty  percent  (50%) of the  royalties  payable to NYU on
          each payment date.

     d.   If CORPORATION does not bring suit against said infringer  pursuant to
          Section 12.b. herein, or has not commenced

                                      -30-

          negotiations with said infringer for discontinuance of said
          infringement, within 90 days after receipt of such notice, NYU shall
          have the right, but shall not be obligated, to bring suit for such
          infringement and to join CORPORATION as a party plaintiff, in which
          event NYU shall hold CORPORATION free, clear and harmless from and
          against any and all costs and expenses of such litigation, including
          attorneys' fees. If CORPORATION has commenced negotiations with an
          alleged infringer of the NYU Patent and/or the JOINT Patents for
          discontinuance of such infringement within such 90-day period,
          CORPORATION shall have an additional ninety (90) days from the
          termination of such initial 90-day period to conclude its negotiations
          before NYU shall bring suit for such infringement. In the event NYU
          brings suit for infringement of the NYU Patents and/or the JOINT
          Patents, NYU shall have the right to first reimburse itself out of any
          sums recovered in such suit or settlement thereof for all costs and
          expenses of every kind and character, including reasonable attorneys'
          fees necessarily involved in the prosecution of such suit, and if
          after such reimbursement, any funds shall remain from said recovery,
          NYU shall promptly pay to CORPORATION an amount equal to fifty percent
          (50%) of such remainder and NYU shall be entitled to receive and
          retain the balance of the remainder of such recovery.

     e.   Each party shall always have the right to be represented by counsel of
          its own selection in any suit for infringement of

                                      -31-

          the NYU Patents and/or the JOINT Patents instituted by the other party
          to this Agreement under the terms hereof. The expense of such counsel
          shall be borne by the party initiating such infringement suit.

     f.   CORPORATION  agrees to cooperate fully with NYU at the request of NYU,
          including,  by  giving  testimony  and  producing  documents  lawfully
          requested in the course of a suit  prosecuted by NYU for  infringement
          of the NYU Patents and/or the JOINT Patents provided NYU shall pay all
          reasonable   expenses   (including   attorneys'   fees)   incurred  by
          CORPORATION in connection with such  cooperation.  NYU shall cooperate
          and shall  endeavor  to cause the NYU  Scientists  to  cooperate  with
          CORPORATION  in  the   prosecution  of  a  suit  by  CORPORATION   for
          infringement  of the NYU Patents  and/or the JOINT  Patents,  provided
          that  CORPORATION  shall  pay  all  reasonable   expenses   (including
          attorneys' fees) involved in such cooperation.

     g.   In the event that there is  infringement of the NYU Patents and/or the
          JOINT  Patents on a commercial  scale and neither NYU nor  CORPORATION
          desire to  prosecute  an action for  infringement  and an  independent
          patent attorney  selected upon mutual agreement of NYU and CORPORATION
          recommends  that an action for  infringement  not be brought,  NYU and
          CORPORATION shall negotiate in good faith a reduction to the royalties
          stated  in  Sections  9.a.(3)  and  9.f.,  which  reduction  shall  be
          effective  prospectively,  from the date such negotiated  reduction is
          reduced to writing and signed by both parties.

                                      -32-

13.  Term and Termination.

     a.   Unless terminated pursuant to this Section 13 or Sections 8.e. or 9.f.
          hereof, this Agreement shall expire on the expiration of the period of
          the License as set forth in Section 7.b. above.

     b.   Six months after the Effective Date, CORPORATION shall have the right
          to terminate this Agreement at any time upon six month's prior written
          notice to NYU

     c.   At any time  prior to  expiration  either  party  may  terminate  this
          Agreement  forthwith for cause by giving  written  notice to the other
          party.  Cause for  termination  of this  Agreement  shall be deemed to
          exist if either NYU or CORPORATION  materially breaches or defaults in
          the  performance  or  observance  of  any of the  provisions  of  this
          Agreement  and such breach or default is not cured  within  sixty (60)
          days or, in the case of  failure  to pay any  amounts  due  hereunder,
          thirty (30) days (unless otherwise  specified herein) after the giving
          of notice by the other party specifying such breach or default,  or if
          either  NYU  or  CORPORATION  discontinues  its  business  or  becomes
          insolvent or bankrupt.

     d.   Upon termination of this Agreement for any reason prior to expiration
          as set forth in Section 13.a. hereof, all rights in and to the
          Research Technology shall revert to NYU, and CORPORATION shall not be
          entitled to make any further use whatsoever of the Research Technology
          and shall not make, use or sell BPI Products and P15 Products.

                                      -33-

     e.   Upon termination of this Agreement for any reason prior to expiration
          of the License as set forth in Section 13.a., CORPORATION shall
          promptly grant to NYU, without consideration, an exclusive license,
          with the right to sublicense, all of the right, title and interest of
          CORPORATION in and to any JOINT Patents and CORPORATION Patents and
          the provisions of Section 14 shall apply.

     f.   Any amount payable hereunder by one of the parties to the other, which
          has not been paid by its due date of payment  shall bear interest from
          its due date of payment until the date of actual payment,  at the rate
          of two percent  (2%) per annum in excess of the Prime Rate  prevailing
          at the  Citibank,  Inc.,  New York,  New York,  during  the  period of
          arrears  and  such  amount  and the  interest  thereon  may be set off
          against  any  amount  due,  whether  in  terms  of this  Agreement  or
          otherwise, to the party in default by any non-defaulting party.

     g.   Termination of this Agreement shall not relieve the parties of any
          obligation occurring prior to such termination.

     h.   Sections 1, 9, 13, 14, 15, 16, 17.b., and 17.c. hereof shall survive
          and remain in full force and effect after any termination,
          cancellation or expiration of this Agreement.

     14.  CORPORATION's Contingent Right to Royalties.

     Upon termination of this Agreement pursuant to Section 13., the following
provisions shall apply:

                                      -34-

     a.   NYU and CORPORATION shall continue to file, prosecute and maintain the
          JOINT Patents and NYU and CORPORATION shall share the expenses
          associated with such filing, prosecution and maintenance of such
          patent. NYU shall not abandon NYU Patents and CORPORATION shall not
          abandon CORPORATION Patents without first providing notice and an
          opportunity to the other party to assume prosecution or maintenance of
          such patents.

     b.   NYU shall have the right, but shall not be obligated, to license one
          or more third parties the JOINT Patents and CORPORATION Patents,
          subject to CORPORATION's rights as defined below.

     c.   With respect to any JOINT Patent and/or CORPORATION Patent which NYU
          licenses to a third party, CORPORATION shall be entitled to receive
          [*] of any royalties or other consideration received by NYU and
          attributable to the JOINT Patents and CORPORATION Patent from such
          third party in consideration of a license to practice such Patents.

15. CORPORATION's Indemnification.

     a.   CORPORATION shall, at all times during the term of this Agreement and
          thereafter, defend, indemnify and hold harmless NYU and its trustees,
          officers, agents, employees, faculty and students from and against any
          and all liability, loss, damages and expenses (including attorneys'
          fees), they may suffer as the result of claims, demands, costs or
          judgments which may be made or

                                      -35-

          instituted against them or any of them arising out of the manufacture,
          distribution, use, testing, sale or other disposition by CORPORATION
          or any Corporation Entity, distributor, customer, sublicensee or
          representative of CORPORATION or anyone in privity therewith, of any
          BPI Products, or any method or process licensed by NYU to CORPORATION
          hereunder or out of any representation made by CORPORATION pursuant to
          Section 19 of this Agreement. CORPORATION's obligation to defend,
          indemnify and hold harmless shall include, but not be limited to,
          claims, demands, costs or judgments, whether for money damages or
          equitable relief by reason of: alleged personal injury (including
          death) to any person; alleged property damage; alleged infringement of
          any United States or foreign patent, copyright or other proprietary
          rights. b. NYU agrees to notify CORPORATION as soon as NYU becomes
          aware of a claim or action for which indemnification may be sought
          pursuant to this Section 15. At NYU's request, CORPORATION shall
          provide attorneys to defend against any claim or action with respect
          to the subject of indemnity contained herein, whether or not such
          claims are rightfully brought or filed.

16.  Security for Indemnification.

     a.   CORPORATION shall not sell any BPI products nor manufacture, have
          manufactured, market or distribute, any BPI Products for commercial
          sale, nor grant any rights to

                                      -36-

          a third party to sell BPI Products or to make, have made, distribute
          or market any BPI Products for commercial sale unless CORPORATION
          shall have first:

          i)   provided NYU with a certificate of insurance proving the
               CORPORATION or such third party has in force, during the term of
               this Agreement, a policy of insurance acceptable to NYU which:

               (a)  is drawn in an amount not less than five million dollars
                    ($5,000,000) for each occurrence as a combined single limit
                    for bodily injury including personal injury and death and
                    property damage; and

               (b)  is endorsed to name NYU, CORPORATION, CORPORATION's
                    sublicensees and their respective partners, trustees,
                    officers, directors, employees, agents and students as
                    additional insureds under such policy of insurance with
                    respect to CORPORATION's obligations to indemnify pursuant
                    to Section 15; and

               (c)  which contains a stipulation that the required coverage will
                    not be reduced, materially altered or cancelled without
                    first giving sixty (60) days prior written notice to NYU's
                    Director of Insurance at NYU; or

                                      -37-

          ii)  provided NYU written evidence acceptable to NYU (at the
               individual full discretion of NYU) that CORPORATION has
               sufficient financial resources to support meaningfully the
               indemnification obligations undertaken in Section 15; or

          iii) provided NYU with CORPORATION's warranty and representation (and
               upon request by NYU, evidence acceptable to NYU) that
               CORPORATION's net worth (excluding intangible assets) during the
               term of this Agreement is in excess of five million dollars
               ($5,000,000), as determined in accordance with accounting
               principles generally accepted in the United States and
               consistently applied; or

          iv)  provided NYU, with a written guarantee and undertaking in form
               satisfactory, on a reasonable basis, to NYU by a party having
               sufficient financial resources to support the indemnification
               obligations undertaken in Section 15. Such party shall be
               required to execute in form satisfactory, on a reasonable basis,
               to NYU a guarantee and undertaking to:

               (a)  provide  defense  and  indemnification  to NYU  pursuant  to
                    Section 15 hereof;

               (b)  maintain  at all times  required  by  Section  16.b.  hereof
                    sufficient  insurance or  self-insurance  to  indemnify  NYU
                    pursuant to Section 15;

               (c)  upon written

                                      -38-

                    request of NYU provide evidence satisfactory, on a
                    reasonable basis, to NYU that such party maintains such
                    insurance or self-insurance, and (d) appoint an agent for
                    service of process in the United States and consent to
                    jurisdiction in the federal and state courts of New York.
                    With respect to such third parties in each instance, NYU and
                    CORPORATION shall negotiate in good faith to determine the
                    nature and extent of the financial resources necessary to
                    constitute "sufficient financial resources" for purposes of
                    this Section 16.a.(iv).

     b.   Unless waived in writing by NYU, CORPORATION agrees that the liability
          insurance policy or policies referred to in Section 16.a. above shall
          be maintained in force for so long as this Agreement remains in force
          and for six (6) years thereafter or as long as CORPORATION or such
          third party shall make, use or sell BPI Products, and for six (6)
          years thereafter, whichever shall be longer. Neither CORPORATION nor
          any third party shall terminate, reduce the face value of, or
          otherwise materially modify such insurance coverage during the
          aforementioned period of time, unless equal or greater coverage is
          provided under another policy in compliance with the foregoing
          provisions and without a gap in coverage.

                                      -39-

17.  Confidential Information.

     a.   Except as otherwise provided in Section 11 above and in Section 17.c.
          below, NYU shall maintain any and all of the Research Technology and
          the JOINT Patents in confidence and shall not release or disclose any
          tangible or intangible component thereof to any third party without
          first receiving the prior written consent of CORPORATION to said
          release or disclosure.

     b.   Except as provided in Section 17.c. below CORPORATION shall maintain
          any and all of the Research Technology and the JOINT Patents in
          confidence and shall not release or disclose any tangible or
          intangible component thereof to any third party without first
          receiving the prior written consent of NYU to said release or
          disclosure.

     c.   The obligations of confidentiality  set forth in Sections 17.a. and b.
          shall not apply to any  component of the Research  Technology  and the
          JOINT  Patents  which  is  part  of the  public  domain  prior  to the
          Effective Date of this Agreement or which becomes a part of the public
          domain  not  due  to  some  unauthorized  act  by or  omission  of the
          receiving party after the Effective Date of this Agreement or which is
          disclosed to the receiving party by a third party who has the right to
          make such disclosure.

     d.   The provisions of Section 17.b. notwithstanding, CORPORATION may
          disclose the Research Technology and the JOINT Patents to third
          parties who need to know the same in order to secure Regulatory
          Approval for the sale of Licensed Products.

                                      -40-

18.  Representation and Covenants.

     a. CORPORATION hereby represents and warrants to NYU as follows:

          i)   CORPORATION is a corporation duly organized, validly existing and
               in good standing under the laws of the State of Delaware.
               CORPORATION has been granted all requisite power and authority to
               carry on its business and to own and operate its properties and
               assets. The execution, delivery and performance of this Agreement
               have been duly authorized by the Board of Directors of
               CORPORATION.

          ii)  There is no pending or threatened litigation involving
               CORPORATION which would have any effect on this Agreement or on
               CORPORATION's ability to perform its obligations hereunder; and

          iii) There is no indenture, contract, or agreement to which
               CORPORATION is a party or by which CORPORATION is bound which
               prohibits or would prohibit the execution and delivery by
               CORPORATION of this Agreement or the performance or observance by
               CORPORATION of any term or condition of this Agreement.

     b. NYU hereby represents and warrants to CORPORATION as follows:

               i) Subject to Sections  4.c. and 5.c.  above,  NYU has the entire
          right,  title and  interest  in and to the NYU Patents  identified  on
          Appendix I;

               ii) NYU does not own or control any patent or patent application
          which covers the making, using or selling

                                      -41-

          of BPI Product and/or Combination  Product other than as identified on
          Appendix I;

               iii) NYU has not granted any rights to third parties (including
          Genentech, Inc.) in and to the Pre-Existing Inventions, or the BPI
          Products. NYU has obtained from Dr. Peter Elsbach his representation
          that he has not entered into or is not presently a party to an
          agreement with any third party, including Genentech, Inc. relating to
          BPI.

               iv) NYU is a corporation duly organized, validly existing and in
          good standing under the laws of the State of New York. NYU has been
          granted all requisite power and authority to carry on its business and
          to own and operate its properties and assets. The execution, delivery
          and performance of this Agreement have been duly authorized by the
          Board of Trustees of NYU.

19.  No Assignment.

     CORPORATION shall not have the right to assign, delegate or transfer at any
     time to any party, in whole or in part, any or all of the rights, duties
     and interest herein granted without first obtaining the written consent of
     NYU to such assignment, except that CORPORATION shall have the right to
     assign this Agreement subject to all the terms and conditions set forth
     herein to a person or entity which acquires control of CORPORATION.

                                      -42-

20. Use of Name.

     Without the prior written consent of NYU, CORPORATION shall not use the
     name of NYU or of any NYU staff member, employee or student, or any
     adaptation thereof;

     i)   in any advertising, promotional or sales literature;

     ii)  in connection with any public or private offering or in conjunction
          with any application for regulatory approval, unless disclosure is
          otherwise required by law, in which case CORPORATION may make factual
          statements concerning the Agreement or file copies of the Agreement
          after providing NYU with an opportunity to comment and reasonable time
          within which to do so on such statement in draft.

          Except as provided herein, neither NYU or CORPORATION will issue
          public announcements about this Agreement or the status or existence
          of the NYU Research Project without prior written approval of the
          other party.

                                      -43-

21. Miscellaneous.

     a.   In carrying out this Agreement the parties shall comply with all
          local, state and federal laws and regulations including but not
          limited to, the provisions of Title 35 United States Code ss.200 et
          seq. and 15 CFR ss.368 et seq.

     b.   If any provision of this Agreement is determined to be invalid or
          void, the remaining provisions shall remain in effect.

     c.   This Agreement shall be governed and interpreted in all respects under
          the laws of the State of  Illinois.  Any  dispute  arising  under this
          Agreement   between  the  parties   requiring   resolution   by  legal
          proceedings  shall be resolved in an action in the state  courts or in
          the federal courts;  if CORPORATION  initiates the legal  proceedings,
          they shall be commenced within the State of New York; if NYU initiates
          the legal  proceedings,  they shall be  commenced  within the State of
          California;  the defendant in either such proceeding shall be entitled
          to bring a  counterclaim  and  join  other  parties  as a part of that
          proceeding.  d. All  payments or notices  required or  permitted to be
          given  under this  Agreement  shall be given in  writing  and shall be
          effective  when either  personally  delivered  or  deposited,  postage
          prepaid, in the United States registered or certified mail,  addressed
          as follows:

                           To NYU:  New York University Medical Center
                                    550 First Avenue
                                    New York, NY 10016
                                    Attention: Isaac T. Kohlberg
                                               Vice President for
                                               Industrial Liaison

                                      -44-

                                       and

                                     Office of Legal Counsel
                                     New York University
                                     Bobst Library - 11th Floor
                                     70 Washington Square South
                                     New York, NY 10012
                                     Attention: Annette B. Johnson, Esq.
                            Associate General Counsel

                           To CORPORATION:  XOMA CORPORATION
                                            2910 Seventh Street
                                            Berkeley, CA 94710
                                            Attention: Office of the
                                                       Chief Executive Officer

                                       and

                                            XOMA CORPORATION
                                            2910 Seventh Street
                                            Berkeley, CA 94710
                                            Attention: Corporate Secretary

                  or such other address or addresses as either party may
                  hereafter specify by written notice to the other. Such notices
                  and communications shall be deemed to have been received by
                  the addressee on the date of delivery or fourteen (14) days
                  after having been sent by registered mail.

     e.   This Agreement (and the annexed Appendices) constitute the entire
          Agreement between the parties and no variation, modification or waiver
          of any of the terms or conditions hereof shall be deemed valid unless
          made in writing and signed by both parties hereto. This Agreement
          supersedes any and all prior agreements or understandings, whether
          oral or written, between CORPORATION and NYU.

     f.   No waiver by either party of any non-performance or violation by the
          other party of any of the covenants, obligations or agreements of such
          other party hereunder shall be deemed to be a waiver of any subsequent
          violation or non-performance of the same or any other covenant,
          agreement or obligation, nor shall forbearance by any party be deemed
          to be a waiver by such party of its rights or remedies with respect to
          such violation or non-performance.

     g.   The descriptive headings contained in this Agreement are included for
          convenience and reference only and shall not be held to expand, modify
          or aid in the interpretation, construction or meaning of this
          Agreement.

                                      -45-





     h.   It is not the intent of the parties to create a partnership or joint
          venture or to assume partnership responsibility or liability. The
          obligations of the parties shall be limited to those set out herein
          and such obligations shall be several and not joint.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement the
date and year first above written.

                                NEW YORK UNIVERSITY

                                By: /s/Isaac T. Kohlberg
                                       Isaac T. Kohlberg
                                    Title:   Vice President for
                                             Industrial Liaison
                                Date:    Sept 21st, 1993

                                XOMA CORPORATION

                                By:  /s/Christopher J. Margolin
                                        Christopher J. Margolin
                                     Title:   Vice President and
                                              General Counsel
                                Date:    September 21, 1993

                                      -46-

                                                                      APPENDIX I







         Title                                         Serial No.          Date           Priority            Status
                                                                                               
         U.S. Applications

I.       Biologically Active                           07/084,335          8/11/97        None                Abandoned in
         Bactericidal/Permeability                                                                            favor of Ser.
         Increasing Protein                                                                                   No. 07/228,335
         Fragments

II.      Biologically Active                           07/228,035          8/5/88         Ser. No.            Abandoned in
         Bactericidal/Permeability                                                        07/084,335          favor of Ser.
         Increasing Protein                                                                                   No. 07/762,730
         Fragments (C-I-P of Ser.
         No. 084,335)

III.     Biologically Active                           07/762,730          9/17/91        Ser. Nos.           Pending
         Bactericidal/Permeability                                                        07/084,335
         Increasing Protein                                                               and
         Fragments (Continuation                                                          07/228,035
         of Ser. No. 228,035)

IV.      DNA Encoding                                  07/805,031          12/11/91       Ser. Nos.           Issued 3/30/93
         Bactericidal/Permeability                                                        07/084,335          as U.S. Patent
         Increasing Proteins                                                              07/228,035          No. 5,198,541
         (Divisional of Ser. No.                                                          07/762,730
         762,730)

V.       Biologically Active                           07/801,814          12/4/91        Ser. Nos.           Pending
         Bactericidal/Permeability                                                        07/084,335
         Increasing Protein                                                               07/228,035
         Fragments (C-I-P of Ser.                                                         07/762,730
         No. 762,730)

VI.      DNA Encoding                                  08/007,837          1/22/93        Ser. Nos.           Pending
         Bactericidal/Permeability                                                        07/084,335
         Increasing Proteins                                                              07/228,035
         (Continuation of Ser. No.                                                        07/762,730
         805,814)                                                                         07/801,814

         Foreign Applications

         Canada                                        07/574,398          8/11/87        Ser. Nos.           Pending
                                                                                          07/084,335
                                                                                          07/228,035

         PCT National and Regional Phase

         European Patent                               88907884.6          2/9/90         Ser. Nos.           Pending
                                                                                          07/804,335
                                                                                          07/228,035

         Japan                                         507146/88           8/9/88         Ser. Nos.           Pending
                                                                                          07/804,335
                                                                                          07/228,035


                                                            APPENDIX I (Cont'd.)



         Title                                         Serial No.          Date           Priority            Status
                                                                                               
         U.S. Applications

I.       Biologically Active                           07/621,473          12/3/90        Ser. Nos.           Abandoned in
         Bactericidal/Permeability                                                        07/084,335          favor of Ser.
         Increasing Protein                                                               07,228,035          No. 754,204
         Fragments (C-I-P of Ser.                                                         07/502,560
         No. 228,035 and
         502,560)

II.      Biologically Active                           07/754,204          8/26/91        Ser. Nos.           Pending
         Bactericidal/Permeability                                                        07/084,335
         Increasing Protein                                                               07/228,035
         Fragments (C-I-P of Ser.                                                         07/502,560
         No. 621,473)                                                                     07/621,473

         PCT National and Regional Phase

         European Patent                               92902215.0          6/3/93         Ser. Nos.           Pending
           France                                                                         07/804,335
           Germany                                                                        07/228,035
           United Kingdom                                                                 07/506,560


                                                                     APPENDIX II



         Title                                         Serial No.          Date           Priority            Status
                                                                                               
         U.S. Applications

I.       Polypeptides that                             07/502,560          3/30/90                            Abandoned in
         Potentiate                                                                                           favor of
         Bactericidal/Permeability                                                                            Ser. No.
         Increasing Protein and                                                                               07/767,551
         Methods for Treating
         Bacterial Infections

II.      Polypeptides that                             07/767,551          9/26/91        Ser. No.            Abandoned in
         Potentiate                                                                       07/502,560          favor of
         Bactericidal/Permeability                                                                            Ser. No.
         Increasing Protein and                                                                               07/905,066
         Methods for Treating
         Bacterial Infections
         (Continuation of Ser. No.
         07/502,560)

III.     Polypeptides that                             07/905,066          6/24/92        Ser. Nos.           Abandoned in
         Potentiate                                                                       07/502,560          favor of
         Bactericidal/Permeability                                                        07/767,551          Ser. No.
         Increasing Protein and                                                                               08/023,760
         Methods for Treating
         Bacterial Infections
         (C-I-P of Ser. No.
         07/767,551)

IV.      Polypeptides that                             08/023,760          2/26/93        Ser. Nos.           Pending
         Potentiate                                                                       07/502,560
         Bactericidal/Permeability                                                        07/767,551
         Increasing Protein and                                                           07/905,066
         Methods for Treating
         Bacterial Infections
         (C-I-P of Ser. No.
         07/905,066)






                                                                  APPENDIX III-A

               Amended and Restated Research and License Agreement
                  Elsbach/Weiss Research Project for Years 1-3

Objectives:

         [*]
                                        1


         [*]

                                        2


         [*]
                                        3

                                                                  APPENDIX III-B

                      NYU RESEARCH PROJECT - FOR YEARS 4-6

         [*]

                                        4


         [*]
                                        5


         [*]
                                        6


         [*]
                                        7


         [*]
                                        8


         [*]
                                        9



                                                                     APPENDIX IV

               Amended and Restated Research and License Agreement
                                Development Plan

         [*]

                                       10


         [*]
                                       11

                                                                      Appendix V

                                    NYU/XOMA
               AMENDED AND RESTATED RESEARCH AND LICENSE AGREEMENT
                            RESEARCH PAYMENT SCHEDULE

     XOMA shall pay NYU for work performed on the NYU Research Project during
the fourth through six years of the Research Period the total of [*] in six
installments of [*] each.

     The first such payment shall be due within fifteen (15) days after the
signature of this Agreement by the last party to sign ("the Execution Date").
Subsequent payments shall be made every six months after the Execution Date
until the total of [*] is paid.

     XOMA may retain [*] of each payment until XOMA receives the written six
month research report provided in accordance with Section 3.c.