EXHIBIT 10.64
                                    SUBLEASE



1.     PARTIES

      This Sublease is entered into by and between THE SCRIPPS RESEARCH 
      INSTITUTE (hereinafter, "Sublessor") and AGOURON PHARMACEUTICALS, INC. 
      (hereinafter, "Sublessee"), as a Sublease under the Master Lease dated 
      January 26, 1994 entered into by THE REGENTS OF THE UNIVERSITY OF 
      CALIFORNIA as Landlord, and Sublessor under this Sublease as Tenant.  
      A copy of the Master Lease is attached hereto as Exhibit A and is 
      incorporated by reference herein.  This Agreement shall be effective 
      ("Effective Date") as of the later of November 1, 1996 or the date on 
      which TSRI delivers possession of any part of the Premises (as defined 
      below) to Agouron.

2.     PROVISIONS CONSTITUTING SUBLEASE

       A.    Except as otherwise provided herein, this Sublease is subject to 
             all of the terms and conditions of the Master Lease set forth in 
             Exhibit A hereto, and Sublessee shall comply with the terms and 
             conditions in said Master Lease, to the extent said terms and 
             conditions are applicable to the Premises subleased pursuant to 
             this Sublease.  Sublessee shall not commit or permit to be 
             committed on the Premises any act or omission which shall 
             violate any term or condition of the Master Lease.

       B.    Provided Sublessee is not in default hereunder, Sublessor agrees 
             not to exercise its early termination option as set forth in 
             paragraph 50 of the Master Lease.

       C.    No provision shall be construed to create any joint venture, 
             partnership, employer/employee, or agency relationship between 
             the parties to this Sublease agreement.

       D.    Except as otherwise provided herein, all of the terms and 
             conditions contained in the Master Lease (Exhibit A hereto) are 
             incorporated by reference as though fully set forth herein as 
             terms and conditions of this Sublease (with each reference 
             therein to Landlord and Tenant to be deemed to refer to 
             Sublessor and Sublessee) and, along with all of the following 
             Sections set out in this Sublease, shall be the complete terms 
             and conditions of this Sublease.

3.     PREMISES

       Sublessor leases to Sublessee and Sublessee hires from Sublessor the 
       following described Premises together with all improvements therein, 
       situated in the City of San Diego, County of San Diego, State of 
       California,  located at 10280 North Torrey Pines Road, Suites 485A and 
       485B, and a storage room provided by the Landlord in the 

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       garage area (hereinafter, "Suite 485C"), totaling approximately 4550 
       rentable square feet (rsf), as outlined in the floor plan attached 
       hereto as Exhibit B and incorporated by reference herein.

4.     TERM

       A.    The term of this Sublease shall be for a period of two (2) years 
             and five (5) months, commencing on November 1, 1996 and ending 
             at midnight on March 31, 1999, unless sooner terminated pursuant 
             to any provision hereof.

       B.    On the last day of the term hereof or on any sooner termination, 
             Sublessee shall surrender the Premises to Sublessor in the same 
             condition as when received, ordinary wear and tear excepted, 
             clean and free of debris and ready for immediate occupancy by a 
             new tenant.

       C.    In the event Sublessor is unable to deliver possession of the 
             Premises at the commencement of the term, Sublessor shall not be 
             liable for any damage caused thereby, nor shall this Sublease be 
             void or voidable.  Sublessee shall not be liable for rent until 
             such time as Sublessor offers to deliver possession of the 
             Premises to Sublessee, but the term hereof shall not be extended 
             by such delay.  Should Sublessor be unable to deliver possession 
             of any portion of the Premises by December 31, 1996, this 
             Sublease shall be voidable at the sole option of Sublessee.  If 
             Sublessee, with Sublessor's consent, takes possession prior to 
             the commencement of the term, Sublessee shall do so subject to 
             all of the covenants and conditions hereof and shall pay rent 
             for the period ending with the commencement of the term at the 
             same rental as that prescribed for the first month of the term, 
             prorated at the rate of 1/30th thereof per day.

5.     RENT AND OTHER CHARGES PAYABLE BY SUBLESSEE

       Sublessee shall pay to sublessor as base rent ("Base Rent") for the 
       Premises in advance on the first day of each calendar month during the 
       remaining portion of the first calendar year of the term of this 
       Sublease (i.e., from November 1, 1996 through December 31, 1996) 
       without deduction, offset, prior notice or demand, in lawful money of 
       the United States, the sum of fourteen thousand, five hundred sixty 
       dollars ($14,560.00).  The Base Rent shall be adjusted according to 
       the provisions, schedules and indices set forth in Paragraphs 4 and 7 
       of the Master Lease attached as Exhibit A hereto.  Such adjustments to 
       the Sublessee's Base Rent shall be in a percentage equivalent to the 
       adjustments made to Sublessor's Base Rent under the Master Lease and 
       shall occur on the same date(s) that adjustments are made pursuant to 
       the Master Lease.

       If the commencement date is not the first day of a calendar month, or 
       if the Sublease termination date is not the last day of a calendar 
       month, a prorated monthly installment shall be paid at the then 
       current rate for the fractional month during which the Sublease 

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       commences and/or terminates.  Said Base Rent shall include operating 
       expenses, utilities, and janitorial service, except as otherwise 
       provided herein.

       Receipt of $14,560.00 is hereby acknowledged for rental for the first 
       month.  Receipt of an additional $14,560.00 as a non-interest-bearing 
       security deposit for performance under this Sublease is also 
       acknowledged.  In the event Sublessee has performed all of the terms 
       and conditions of this Sublease throughout the term and has paid all 
       sums owing to Sublessor, upon Sublessee vacating the Premises, the 
       security deposit shall be returned to Sublessee.

6.     USE

       The Premises shall be used and occupied only for general office use 
       and for laboratories for scientific research, or any other use which 
       is reasonably comparable and for no other purpose.  The Premises shall 
       not be used or occupied for any purpose inconsistent with San Diego 
       Municipal Code Section 101.0434, which applies to areas zoned for 
       scientific research.

       Sublessee's business shall be established and conducted throughout the 
       term hereof in a first class manner.  Sublessee shall not use the 
       Premises for, or carry on, or permit to be carried on, any offensive, 
       noisy or dangerous trade, business, manufacture, or occupation, nor 
       permit any auction sale to be held or conducted on or about the 
       Premises.  Sublessee shall not do or suffer anything to be done upon 
       the Premises which will cause structural injury to the Premises or the 
       building of which the Premises forms a part.  The Premises shall not 
       be overloaded and no machinery, apparatus or other appliance shall be 
       used or operated in or upon the Premises which will in any manner 
       injure, vibrate, or shake the Premises or the building of which it is 
       a part.  No use shall be made of the Premises which will in any way 
       impair the efficient operation of the sprinkler system (if any) within 
       the building containing the Premises.  Sublessee shall not leave the 
       Premises unoccupied or vacant during the term.  No musical instrument 
       of any sort, or any noise making device, will be operated in or 
       allowed upon the Premises for the purpose of attracting trade or 
       otherwise.  Sublessee shall not use or permit the use of the Premises 
       or any part thereof for any purpose which will increase the existing 
       rate of insurance upon the building in which the Premises are located, 
       or cause a cancellation or non-renewal of any policy covering the 
       building or any part thereof.  If any action on the part of Sublessee 
       or use of the Premises by Sublessee shall cause, directly of 
       indirectly, any increase of Sublessor's insurance expense, said 
       additional expense shall be paid by Sublessee to Sublessor upon 
       written demand.  No such payment by Sublessee shall limit Sublessor in 
       the exercise of any other rights or remedies, or constitute a waiver 
       of Sublessor's right to require Sublessee to discontinue such act or 
       use.

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7.     HAZARDOUS MATERIALS

       In addition to the provisions set forth in Paragraph 47 of the Master 
       Lease, Sublessee further agrees to the following provisions.

       A.    Sublessee shall indemnify Sublessor and Sublessor's affiliated 
             corporations, including TSRI, Scripps Health, Scripps Foundation 
             for Medicine and Science, and Scripps Institution of Medicine 
             and Science, and their respective trustees, officers, partners, 
             directors, shareholders, employees, contractors, agents, 
             successors, and assigns (collectively, "Sublessor's Persons") 
             and shall defend (with counsel previously approved by Sublessor 
             in writing, which approval shall not unreasonably be withheld) 
             and hold harmless Sublessor and Sublessor's Persons from and 
             against any and all claims, suits, court or administrative 
             proceedings, losses, costs, damages, liabilities, deficiencies, 
             fines, penalties, forfeitures, punitive damages or expenses 
             (including, without limitation, attorneys' fees), death of or 
             injury (including, without limitation, sickness or disease to 
             any person or tangible damage to any real or personal property 
             whatsoever, incurred by, arising out of, based upon or resulting 
             from (i) Sublessee's failure to perform or observe any of its 
             obligations or agreements under Paragraph 47 of the Master 
             Lease; (ii) the release, threatened release, generation, 
             discharge, storage, disposal or transportation of any Toxic 
             Material under, in or about, to or from the Premises occurring 
             or resulting from acts or omissions of Sublessee or Sublessee's 
             employees, agents, or invitees taking place on or after 
             Sublessee takes possession of the Premises (and not resulting 
             from any negligent or willful misconduct of Sublessor); or (iii) 
             the failure of Sublessee or its employees, agents or invitees to 
             comply with any environmental or hazardous substance laws.  The 
             foregoing indemnification shall survive the expiration of the 
             Term or earlier termination of this Sublease.

       B.    As a material inducement to Sublessor to allow Sublessee to use 
             Toxic Materials in connection with its activities, Sublessee 
             agrees to deliver to Sublessor on November 1, 1996, November 1, 
             1997, November 1, 1998, and March 31, 1999 ("Disclosure Dates"), 
             a report disclosing to Sublessor the names and amounts of all 
             Toxic Materials which were stored, used, transported upon, or 
             disposed of on the Premises, or which Sublessee intends to 
             store, use or dispose of on the Premises, for the year prior to 
             and after each Disclosure Date.  The matter to be identified in 
             the disclosure (the "Toxic Materials Report") shall be all 
             matter reasonably considered to be hazardous, toxic, infectious, 
             or radioactive, including all matter identified as Toxic 
             Materials or Hazardous Substances according to the Hazardous 
             Substance Laws referred to hereinabove.  Said Toxic Materials 
             Report shall also list any and all governmental approvals or 
             permits required in connection with the presence of such Toxic 
             Materials on the Premises and a copy of the Hazardous Substances 
             business plan prepared pursuant to Health and Safety Code 
             Sections 25500, et seq.  Sublessee shall deliver to Sublessor 
             true and correct copies of the following documents

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             (hereinafter referred to as the "Documents"), relating to the 
             handling, storage, disposal and emission of Toxic Materials upon 
             written request:  (i) permits; (ii) approvals; (iii) reports and 
             correspondence relating to the release of Toxic Materials; (iv) 
             storage and maintenance plans; (v) notice of violations of any 
             laws; (vi) plans relating to the installation of any storage 
             tanks to be installed in or under the Premises (provided, said 
             installation of tanks shall only be permitted after Sublessor 
             has given Sublessee its written consent to do so, which consent 
             may be withheld in Sublessor's sole discretion); and (vii) all 
             closure plans or any other documents required by any and all 
             federal, state and local governmental agencies and authorities 
             for any storage tanks installed in, on or under the Premises.  
             Sublessor acknowledges that it is not the intent of this Section 
             to prohibit Sublessee from carrying on its operations or to 
             unreasonably interfere with such operations.  Sublessee may 
             carry on its operations according to the custom of the industry 
             so long as the use, presence and disposal of Hazardous Substance 
             is strictly and properly monitored according to all applicable 
             governmental requirements.

             The aforementioned disclosures shall be hand-delivered, sent via 
             courier, or sent via overnight delivery and shall be addressed 
             to:  Director, Environmental Health and Safety, The Scripps 
             Research Institute, 10550 North Torrey Pines Road, Mail Drop 
             BCC-078, La Jolla, CA 92037, phone: (619) 784-8240.

      C.     Notwithstanding the provisions of this Section, Sublessor shall 
             have the right to terminate this Sublease in the event that (i) 
             Sublessee uses the Premises for the generation, storage, use, 
             treatment or disposal of Toxic Materials in a manner prohibited 
             by applicable law and such use has a material adverse effect on 
             Sublessor or the Premises; (ii) Sublessee has been required by 
             any governmental authority to take remedial action in connection 
             with Toxic Materials contaminating the Premises if the 
             contamination resulted from Sublessee's action or use of the 
             Premises and such remedial action has a material adverse effect 
             on Sublessor or the Premises; or (iii) Sublessee is subject to 
             an enforcement order issued by any governmental authority in 
             connection with the use, disposal or storage of Toxic Materials 
             on the Premises and such enforcement order has a material 
             adverse effect on Sublessor or the Premises.  Each of the 
             foregoing events shall be deemed to be a material default by 
             Sublessee under this Sublease.

      D.     Upon the expiration or upon any early termination of this 
             Sublease, Premises shall be returned by Sublessee to Sublessor 
             in good operating condition and free of Toxic Materials.  At 
             that time, presuming there has been no release, discharge or 
             emission of Toxic Materials on the Premises during Sublessee's 
             occupancy thereof, Sublessee shall furnish to Sublessor, at 
             Sublessee's sole cost, the results of appropriate environmental 
             tests and studies as may be customary, reasonable, and in 
             accordance with all applicable requirements of governmental 
             entities and applicable environmental laws, so as to obtain 

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             assurance that the Premises are free from any Toxic Materials or 
             contamination in excess of legally permissible levels.  If, 
             however, a release, discharge or emission of Toxic Materials has 
             occurred on the Premises during Sublessee's occupancy thereof, 
             Sublessee shall furnish to Sublessor, at Sublessee's sole cost, 
             a then-customary environmental audit or similar remediation plan 
             for the Premises, plus such additional tests and studies as may 
             be customary, reasonable or recommended by said audit, so as to 
             obtain a then-customary and reasonable verification that the 
             Premises are free from any Toxic Materials or contamination in 
             excess of legally permissible levels.  If said tests or studies 
             indicate that there are any impermissible levels of Toxic 
             Materials on the Premises, then, to the extent such 
             impermissible levels of Toxic Materials were generated by 
             Sublessee, Sublessee shall pay for all costs necessary to clean 
             up and remedy said impermissible levels of Toxic Materials to 
             the extent such levels of Toxic Materials are not permitted by 
             applicable governmental laws or regulations.  Sublessor shall 
             cooperate in good faith with Sublessee to approve a remediation 
             plan which mitigates the overall damages and costs. but if such 
             remediation plan involves a delay in completing the remediation, 
             then Sublessee shall agree to toll the statute of limitations 
             for the duration of said delay applicable to any claim against 
             Sublessee related to Sublessee's obligation to clean up Toxic 
             Materials.  Provided, however, Sublessee shall have no duty with 
             respect to any such Toxic Materials which (i) were on the 
             Premises prior to the effective date, or (ii) were placed on the 
             Premises by means of spillage or seepage from a neighboring 
             property, or (iii) were generated by Sublessor.

      E.     Sublessee's obligations under this section and under Paragraph 
             47 of the Master Lease shall survive the termination of this 
             Sublease.  During any period of time employed by Sublessee after 
             the termination of this Sublease to complete the removal from 
             the Premises of any such Toxic Materials, Sublessee shall 
             continue to pay the full Rent in accordance with this Sublease.  
             (Provided, however, to the extent that some or all of the 
             Premises continue to be used while the remediation work is being 
             conducted, then said rental income or value of the portion of 
             the Premises which are used shall be credited against the Rent 
             otherwise payable by Sublessee for the same premises and time 
             period.)

8.     MISCELLANEOUS PROVISIONS

      A.     Parking:  Sublessor shall provide Sublessee approximately 
             eighteen (18) parking spaces in the parking garage in accordance 
             with Paragraph 40 of the Master Lease (Exhibit A hereto).

      B.     Utility Usage:  Sublessor and Sublessee intend to prorate the 
             cost of utility usage including air conditioning, heating and 
             electrical usage based on Sublessor being responsible for fifty-
             five and five-tenths percent (55.5%) of such charges and 
             Sublessee being responsible for forty-four and five-tenths 
             percent (44.5%) of such charges.  Should either party use 
             excessive utility 

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             services, then such party will be responsible for the cost of 
             the excess utility usage.

      C.     Telecommunications Room:  Sublessor, upon reasonable notice to 
             Sublessee, will have access to the telecommunications room 
             located in the Premises leased to Sublessee as outlined on the 
             floor plan attached hereto as Exhibit B.

     D.     Warm Room:  The parties hereto understand and acknowledge that 
             access to an incubation area or "warm room" is important to the 
             scientific research conducted by both parties.  Since the 
             Premises contain a warm room to which both parties hereto desire 
             access, Sublessee agrees that, until a replacement solution (in 
             the form of additional warm room facilities) is identified, 
             Sublessor shall have unrestricted, exclusive access to the warm 
             room facilities contained within the leased Premises.  In 
             consideration for said access, Sublessor agrees to reduce the 
             rent due to Sublessor from Sublessee by fifty percent (50%) 
             during the time Sublessor has access to the warm room facilities 
             within the leased Premises, until such time that a replacement 
             solution is in operation.  Sublessor further agrees to use its 
             reasonable best efforts to make a replacement solution 
             available.

      E.     First Right to Negotiate:  Sublessor will provide Sublessee with 
             a first right to negotiate to lease the remaining space occupied 
             by Sublessor if Sublessor vacates said space any time during the 
             term of the Sublease.

      F.     Storage Room:  Sublessor and Sublessee agree to prorate the cost 
             of the storage room which provides deionized water and other 
             services, whereby  Sublessee shall pay Sublessor a monthly 
             charge of $175.00/month with annual CPI adjustments, pursuant to 
             paragraph 49 of the Master Lease.


9.     NOTICES

       All notices or demands of any kind required or desired to be given by 
       Sublessor or Sublessee hereunder shall be in writing and shall be 
       deemed delivered forty-eight (48) hours after depositing the notice or 
       demand in the United States mail, certified or registered, postage 
       prepaid, addressed to the Sublessor or Sublessee, respectively, at the 
       addresses set forth after their signatures hereinbelow.  All rent and 
       other payments due pursuant to this Sublease or the Master Lease shall 
       be made by Sublessee to Sublessor at the same address.

///

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          IN WITNESS WHEREOF, the parties have executed this 
Sublease by their duly authorized representatives as of the date set 
forth above.


SUBLESSOR:                              SUBLESSEE:

THE SCRIPPS RESEARCH INSTITUTE          AGOURON PHARMACEUTICALS, INC.


By:  /S/ DONNA J. WESTON                 By:  /S/ GLENN ZINSER
     ---------------------------              --------------------------- 
     Donna J. Weston

Title:  Vice President and               Title:  VP, Operations
        Chief Financial Officer

  10550 N. Torrey Pines Road             10350 N. Torrey Pines Road
  La Jolla, CA 92037                     La Jolla, CA 92037

Dated:  11/4/96                          Dated: 11/4/96          

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