TITAN PHARMACEUTICALS INC
10QSB, 1997-08-08
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>

                       U.S. SECURITIES AND EXCHANGE COMMISSION
                               WASHINGTON, D.C.  20549
                                     FORM 10-QSB

/X/ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange
Act of 1934 for the Period Ended June 30, 1997.

                                          or

/ / Transition report Pursuant to Section 13 or 15(d) of the Securities
Exchange Act of 1934 for the Transition Period From _____________ to
__________________.

    Commission file number 0-27436

                             TITAN PHARMACEUTICALS, INC.
                (Exact name of registrant as specified in its charter)
              DELAWARE                                94-3171940
    (State or Other Jurisdiction of                (I.R.S. Employer
     Incorporation or Organization)               Identification No.)

       400 OYSTER POINT BLVD., SUITE 505, SOUTH SAN FRANCISCO, CALIFORNIA 94080
             (Address of Principal Executive Offices including zip code)

                                    (415) 244-4990
                   (Issuer's Telephone Number, Including Area Code)


Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12
months (or for such shorter period that the registrant was required to file such
reports), and (2) has been subject to such filing requirements for the past 90
days.  Yes X  No
         ---   ---

State the number of shares outstanding of each of the issuer's common equity as
of August 4, 1997:  13,046,102 shares of  Common Stock outstanding, $.001 par
value.

Transitional Small Business Disclosure Format. Yes    No X
                                                 ---   ---


<PAGE>

                             TITAN PHARMACEUTICALS, INC.
                                 INDEX TO FORM 10-QSB


PART I.  FINANCIAL INFORMATION                                            PAGE

         Item 1.  Condensed Consolidated Financial Statements (unaudited)

         Condensed Consolidated Balance Sheets
            June 30, 1997 and December 31, 1996. . . . . . . . . . . . . . .2

         Condensed Consolidated Statements of Operations
            Three months and six months ended June 30, 1997
            and 1996 and period from commencement of
            operations (July 25, 1991) to June 30, 1997. . . . . . . . . . .3

         Condensed Consolidated Statements of Cash Flows
            Six months ended June 30, 1997 and 1996 and
            period from commencement of operations
            (July 25, 1991) to June 30, 1997 . . . . . . . . . . . . . . . .4

            Notes to Condensed Consolidated Financial
            Statements - June 30, 1997 . . . . . . . . . . . . . . . . . . .5

         Item 2.  Management's Discussion and Analysis
            or Plan of Operations. . . . . . . . . . . . . . . . . . . . . .8

PART II. OTHER INFORMATION

         Item 6.  Exhibits and Reports on Form 8-K . . . . . . . . . . . . 11

SIGNATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12


<PAGE>


    PART I.  FINANCIAL INFORMATION


                             TITAN PHARMACEUTICALS, INC.
                            (A DEVELOPMENT STAGE COMPANY)
                             CONSOLIDATED BALANCE SHEETS



<TABLE>
<CAPTION>

                                                                  JUNE 30,   DECEMBER 31,
                                                                   1997          1996
                                                                (Unaudited)    (Note A)
                                                                -----------  ------------
<S>                                                            <C>           <C>
Assets
Current assets
  Cash and cash equivalents                                    $11,413,881    $ 1,376,532
  Short-term investments                                           500,000     13,000,000
  Prepaid expenses and other current assets                        216,089        193,324
  Receivable from Ansan Pharmaceuticals, Inc.                      189,300        117,881
  Note receivable from Ansan Pharmaceuticals, Inc.               1,000,000            -
                                                               -----------    -----------
    Total current assets                                        13,319,270     14,687,737
Furniture and equipment, net                                       282,579        791,579
Deferred financing costs                                            50,000         96,349
Investment in Ansan Pharmaceuticals, Inc.                           89,029        590,854
Other assets                                                        47,266        199,830
                                                               -----------    -----------
                                                               $13,788,144    $16,366,349
                                                               -----------    -----------
                                                               -----------    -----------
Liabilities and Stockholders' Equity
Current Liabilities
  Accounts payable                                             $ 1,113,473    $   692,982
  License fee payable                                            2,000,000            -
  Accrued legal fees                                               254,178        587,800
  Accrued sponsored research                                       153,327        163,905
  Other accrued liabilities                                        967,610        233,044
  Current portion of capital lease obligation                          -          265,462
  Current portion of technology financing - Ingenex, Inc.              -          570,711
                                                               -----------    -----------
    Total current liabilities                                    4,488,588      2,513,904
Noncurrent portion of capital lease obligation
                                                                       -          481,676
Noncurrent portion of technology financing - Ingenex, Inc.             -          718,602
                                                               -----------    -----------
Total liabilities                                                4,488,588      3,714,182
Commitments
Minority interest - Series B preferred stock of Ingenex, Inc.    1,241,032      1,241,032
Guaranteed security value (Note 3)                               5,500,000            -
Stockholders' Equity:
  Common stock, at amounts paid in                              49,622,782     49,619,784
  Additional paid-in capital                                     6,521,353      6,521,353
  Deferred compensation                                           (544,220)      (630,100)
  Deficit accumulated during the development stage             (53,041,391)   (44,099,902)
                                                               -----------    -----------
    Total stockholders' equity                                   2,558,524     11,411,135
                                                               -----------    -----------
                                                               $13,788,144    $16,366,349
                                                               -----------    -----------
                                                               -----------    -----------

</TABLE>
 

    Note A:  The balance sheet at December 31, 1996 has been derived from the
    audited financial statements at that date but does not include all of the
    information and footnotes required by generally accepted accounting
    principles for complete financial statements.


                               See accompanying notes.
                                          2
<PAGE>

                             TITAN PHARMACEUTICALS, INC.
                            (A DEVELOPMENT STAGE COMPANY)
                        CONSOLIDATED STATEMENTS OF OPERATIONS
                                     (UNAUDITED)

<TABLE>
<CAPTION>

                                                                                                                   PERIOD FROM
                                                                                                                   COMMENCEMENT
                                                                                                                   OF OPERATIONS
                                                      THREE MONTHS ENDED JUNE 30,   SIX MONTHS ENDED JUNE 30,   (JULY 25, 1991) TO
                                                      ---------------------------   -------------------------
                                                         1996           1997           1996           1997          JUNE 30, 1997
                                                      -----------    -----------    -----------    ----------   ------------------
<S>                                                  <C>            <C>            <C>            <C>            <C>
Grant revenue                                        $      -       $   111,483    $    49,705    $   147,745        $    546,078

Costs and expenses:
   Research and development                            1,522,090      2,643,240      2,349,988      4,817,975          32,398,368
   Acquired in-process research and development
                                                             -              -              -        9,500,000          10,186,000
   General and administrative                          1,054,793      1,626,973      1,975,986      2,963,891          14,792,237
                                                     -----------    -----------    -----------    -----------        ------------
         Total costs and expenses                      2,576,883      4,270,213      4,325,974     17,281,866          57,376,605
                                                     -----------    -----------    -----------    -----------        ------------
         Loss from operations                         (2,576,883)    (4,158,730)    (4,276,269)   (17,134,121)        (56,830,527)

Other income (expense):
   Gain on sale of technology and fixed assets               -        8,513,884            -        8,513,884           8,513,884
   Equity in loss of Ansan, Inc.                        (176,813)      (221,785)      (355,489)      (501,824)         (1,957,910)
   Interest income                                       263,326        147,378        339,748        319,313           1,490,055
   Interest expense                                     (195,077)       (63,670)    (1,818,206)      (138,741)         (4,301,743)
                                                     -----------    -----------    -----------    -----------        ------------
         Other expense - net                            (108,564)     8,375,807     (1,833,947)     8,192,632           3,744,286
                                                     -----------    -----------    -----------    -----------        ------------
         Income (loss) before minority interest       (2,685,447)     4,217,077     (6,110,216)    (8,941,489)        (53,086,241)
   Minority interest in losses of subsidiaries               -              -            9,853            -              44,850
                                                     -----------    -----------    -----------    -----------        ------------
         Net Income (loss)                           $(2,685,447)   $ 4,217,077    $(6,100,363)   $(8,941,489)       $(53,041,391)
                                                     -----------    -----------    -----------    -----------        ------------
                                                     -----------    -----------    -----------    -----------        ------------

Net income (loss) per share                          $     (0.25)       $  0.32    $     (1.18)   $     (0.67)
                                                     -----------    -----------    -----------    -----------
                                                     -----------    -----------    -----------    -----------

Shares used in per share computation                  10,757,940     13,157,382      9,791,050    12,971,902
                                                     -----------    -----------    -----------    -----------
                                                     -----------    -----------    -----------    -----------


</TABLE>
 

                               See accompanying notes.
                                          3
<PAGE>



                             TITAN PHARMACEUTICALS, INC.
                            (A DEVELOPMENT STAGE COMPANY)
                        CONSOLIDATED STATEMENTS OF CASH FLOWS
                                     (UNAUDITED)

<TABLE>
<CAPTION>

                                                                                        PERIOD FROM
                                                                                     COMMENCEMENT OF
                                                                                     OPERATIONS (JULY
                                                           SIX MONTHS ENDED JUNE 30,   25, 1991) TO
                                                           -------------------------
                                                              1996           1997      JUNE 30, 1997
                                                           ----------     ----------   -------------

<S>                                                      <C>            <C>            <C>
CASH FLOWS FROM OPERATING ACTIVITIES
   Net loss                                              $ (6,100,363)  $ (8,941,489)  $(53,041,391)
   Adjustments to reconcile net loss to net cash used
  in operating activities
  Amortization and depreciation                               222,417        245,576      1,308,767
  Issuance of common stock to acquire technology                  -        5,500,000      5,500,000
  Accrued license fee to acquire technology                       -        2,000,000      2,000,000
  Loss (gain) on sale of equipment                                          (218,654)      (218,654)
  Accretion of discount on indebtedness                     1,407,579            -        2,290,910
  Equity in loss of Ansan, Inc.                               355,489        501,825      1,957,911
  Other                                                        (9,626)           -          (35,653)
  Issuance of common stock to acquire
    minority interest of Theracell, Inc.                          -              -          686,000
  Changes in operating assets and liabilities:
    Prepaid expenses and other current assets                 (38,902)       (22,765)      (216,089)
    Receivable - Ansan, Inc.                                  (24,660)       (71,419)      (189,300)
    Other assets                                              (28,108)       152,564        (52,231)
    Accounts payable                                           66,980        420,491      1,347,663
    Other accrued liabilities                              (1,124,651)       390,366      1,865,531
                                                         ------------   ------------   ------------
Net cash used in operating activities                      (5,273,845)       (43,505)   (36,796,536)
                                                         ------------   ------------   ------------

CASH FLOWS FROM INVESTING ACTIVITIES
  Purchase of furniture and equipment                         (63,641)       (51,718)    (1,124,077)
  Purchases of short-term investments                     (10,261,502)      (100,000)   (59,782,493)
  Proceeds from sales of short-term investments             3,750,000     12,600,000     59,282,493
  Issuance of debenture to Ansan Pharmaceuticals, Inc.            -       (1,000,000)    (1,000,000)
  Effect of deconsolidation of Ansan, Inc.                        -              -         (135,934)
                                                         ------------   ------------   ------------
Net cash provided by (used in) investing activities        (6,575,143)    11,448,282     (2,760,011)
                                                         ------------   ------------   ------------

CASH FLOWS FROM FINANCING ACTIVITIES
  Issuance of common stock                                 16,357,887          2,998     30,028,760
  Offering costs                                               (2,483)           -              -
  Deferred financing costs                                        -           46,349       (763,899)
  Issuance of preferred stock                                     -              -       17,601,443
  Proceeds from notes payable and advances payable                -              -        2,681,500
  Repayment of notes payable                                      -              -       (1,441,500)
  Proceeds for Ansan bridge financing                             -              -        1,425,000
  Proceeds from Titan and Ingenex bridge financing                -              -        5,250,000
  Repayment of Titan and Ingenex bridge financing          (5,250,000)           -       (5,250,000)
  Proceeds from capital lease                                     -              -          658,206
  Payments of principal under capital lease obligation       (108,887)      (127,462)      (633,766)
  Proceeds from Ingenex, Inc. technology financing                -              -        2,000,000
  Principal payments on Ingenex, Inc.
    technology financing                                     (238,155)    (1,289,313)    (2,000,000)
  Increase in minority interest from issuances of
  preferred stock by Ingenex, Inc.                                -              -        1,241,032
  Issuance of common stock by subsidiaries                      9,853            -          173,652
                                                         ------------   ------------   ------------
Net cash provided by (used in) financing activities        10,768,215     (1,367,428)    50,970,428
                                                         ------------   ------------   ------------

Net increase (decrease) in cash and cash equivalents         (880,773)    10,037,349     11,413,881
Cash and cash equivalents, beginning of period                947,805      1,376,532            -
                                                         ------------   ------------   ------------
Cash and cash equivalents, end of period                 $     67,032   $ 11,413,881   $ 11,413,881
                                                         ------------   ------------   ------------
                                                         ------------   ------------   ------------

</TABLE>
 

                               See accompanying notes.
                                          4
<PAGE>

1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

THE COMPANY AND ITS SEVERAL DEVELOPMENT STAGE SUBSIDIARIES
    Titan Pharmaceuticals, Inc. (the "Company") was incorporated in February
1992 in the State of Delaware.  It is the holding company for several
development stage biotechnology companies ("the Operating Companies").  The
development stage companies, which rely significantly on third parties to
conduct sponsored research, are Ansan Pharmaceuticals, Inc. ("Ansan"), Ingenex,
Inc. ("Ingenex"), Theracell, Inc. ("Theracell"), ProNeura, Inc. ("ProNeura"),
and Trilex Pharmaceuticals, Inc., formerly Ascalon, Inc. ("Trilex").

    ANSAN PHARMACEUTICALS, INC.

    Ansan was incorporated in November 1992 to engage in the development of
novel treatment of cancer and other disorders characterized by abnormal cellular
growth and differentiation.  It was a majority-owned consolidated subsidiary
until August 1995.  In August 1995, Ansan completed an initial public offering
of its securities.  Such offering reduced the Company's ownership in Ansan from
approximately 95% to approximately 43%.  Since August 1995, the Company has
accounted for its investment in Ansan using the equity method.  At June 30,
1997, the Company owned 43% of Ansan. See Note 4.

    INGENEX, INC.

Ingenex was incorporated in July 1991 and reincorporated in June 1992.  It is
engaged in the development of gene-based therapeutics and the discovery of
medically important genes for the treatment of cancer and viral diseases. On
June 4, 1997, Ingenex sold its GSX System, a research technology, and certain
fixed assets for cash and the assumption of certain lease liabilities (see Note
5).  At June 30, 1997, the Company owned 81% of Ingenex.

    THERACELL, INC.

    Theracell was incorporated in November 1992 to engage in the development of
novel treatments for various neurologic disorders through the transplantation of
neural cells and neuron-like cells directly into the brain.  At June 30, 1997,
the Company owned 100% of Theracell.

    PRONEURA, INC.

    ProNeura was incorporated in October 1995 to engage in the development of
cost effective, long term treatment solutions to neurological and psychiatric
disorders through an implantable drug delivery system.  At June 30, 1997, the
Company owned 79% of ProNeura.

    TRILEX PHARMACEUTICALS, INC.

Trilex was incorporated in May 1996 to engage in research and development of
cancer therapeutic vaccines utilizing anti-idiotypic antibody technology.  At
June 30, 1997, the Company owned 100% of Trilex.

BASIS OF PRESENTATION

    The accompanying unaudited consolidated financial statements have been
prepared in accordance with generally accepted accounting principles for interim
financial information and with the instructions to Form 10-QSB and Article 10 of
Regulation S-X.  Accordingly, they do not include all of the information and
footnotes required by generally accepted accounting principles for complete
financial statements.  In the opinion of management, all adjustments (consisting
of normal recurring accruals) considered necessary for a fair presentation have
been included.  Operating results for the six month period ended June 30, 1997
are not necessarily indicative of the results that may be expected for the year
ended December 31, 1997.  These financials should be read in conjunction with
the audited consolidated financial statements and footnotes


                                          5
<PAGE>

thereto included in the Titan Pharmaceuticals, Inc. annual report on Form 10-KSB
for the year ended December 31, 1996.

PER SHARE DATA

    For purposes of computing net loss per share data in the six months ended
June 30, 1996, the net loss has been increased by a $5,431,871 deemed dividend
(see Note 2).  Per share data is computed using the weighted average number of
common and common equivalent shares outstanding.  Common equivalent shares
include the dilutive effect of outstanding stock options calculated using the
Treasury Stock Method.  Such shares are excluded from the computation in periods
in which the Company incurred a net loss as their effect is antidilutive.

    In February 1997, the Financial Accounting Standards Board issued Statement
No. 128, "Earnings Per Share", which is required to be adopted on December 31,
1997.  At that time, the Company will be required to change the method currently
used to compute earnings per share and to restate all prior periods.  Under the
new requirements for calculating primary earnings per share, the dilutive effect
of stock options will be excluded.  The impact is not expected to result in a
change in primary earnings per share for the three and six months ended June 30,
1996 and 1997.

2. STOCKHOLDERS' EQUITY

DEEMED DIVIDEND

    The holders of Series A and Series B preferred stock received common stock
in January 1996 with an aggregate fair value (at the $5.00 per share value of
the initial public offering)(the "IPO") which exceeded by $5,431,871 the cost of
their initial investment in Series A and Series B preferred stock.  This amount
has been deemed to be the equivalent of a preferred stock dividend.  The Company
recorded the deemed dividend at the time of the conversion by offsetting charges
and credits to additional paid in capital, without any effect on total
stockholders' equity (net capital deficiency).  There was no effect on net loss
from the mandatory conversion.  However, the amount did increase the loss
applicable to common stock, in the calculation of net loss per share in the 1996
period.

3.  COLLABORATIVE AGREEMENTS

HOECHST MARION ROUSSEL, INC. AGREEMENT

    In January 1997, the Company entered into an exclusive license agreement
(the "HMR Agreement") with Hoechst Marion Roussel, Inc. ("Hoechst").  The
license agreement gives the Company a worldwide license to Hoechst's patent
rights and know-how related to a chemical compound known as Iloperidone,
including the ability to develop, use, sublicense, manufacture and sell products
and processes claimed in the patent rights.  Terms of the HMR Agreement required
the Company to pay Hoechst an upfront license fee of $9,500,000, payable as
follows: (i) $2,000,000 in cash on January 20, 1997; (ii) the issuance of
$5,500,000 of common stock (594,595 shares) on January 20, 1997; (iii) and
$2,000,000 in cash on July 18, 1997.  As a result of this transaction, the
Company incurred a charge for acquired in-process research and development of
$9,500,000.  During the period from October 1997 through January 1999, the
Company shall be obligated to pay to Hoechst the difference between $5,500,000
and the net proceeds received by Hoechst upon sale of the above mentioned common
stock.  Accordingly, this has been recorded as guaranteed security value in the
accompanying balance sheet.  Any cash paid under the guarantee agreement will be
charged against this balance, and the remaining balance, if any, will be
transferred to common stock. The Company's current stock price is significantly
depressed, indicating a potential liability at August 4, 1997 of $3.98 million
related to the Hoechst shares.  In addition, the Company is required to make
additional benchmark payments as specific milestones are met.  Upon
commercialization of the product, the license agreement provides that the
Company will pay royalties based on net sales.


                                          6
<PAGE>

4.  NOTE RECEIVABLE FROM ANSAN PHARMACEUTICALS, INC. AND RELATED TRANSACTIONS

    In March 1997, Titan and Ansan entered into an agreement for financing
pursuant to which Titan advanced Ansan $1,000,000 in return for a debenture
which was convertible at any time prior to June 21, 1997 into 333,333 shares of
Ansan common stock (the "Debenture").  The Company did not convert the
Debenture.  The Debenture bears interest at prime plus 2% and is due in April
1998.  In July 1997, the Company entered into a sublicense agreement with Ansan
pursuant to which it acquired an exclusive worldwide license to Ansan's butyrate
compounds for anti-cancer and certain other indications in exchange for the
Company's payment of a 2% royalty on net sales and the Company's transfer to
Ansan of all of its equity holdings in Ansan.  The sublicense is a component of
an Agreement and Plan of Reorganization and Merger between Ansan and Discovery
Laboratories, Inc., a privately-held development stage biotechnology company,
pursuant to which Discovery will be merged with and into Ansan (the "Merger").
The closing of the Merger is subject to customary closing conditions, including
approval by the stockholders of Ansan and Discovery.  Upon completion of the
Merger, Ansan will repay approximately $1,200,000 of outstanding indebtedness to
the Company, including the Debenture.  The sublicense is subject to consummation
of the Merger.

5.  INGENEX SALE OF GSX SYSTEM

    On June 4, 1997, Ingenex sold its GSX System, a research technology, and
certain fixed assets to Pharmaceutical Product Development, Inc. for $8,722,500
in cash and the assumption of certain capital lease liabilities.


                                          7
<PAGE>

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OR PLAN OF OPERATION

     The following discussion contains certain forward-looking statements, 
within the meaning of the "safe harbor" provisions of the Private Securities 
Litigation Reform Act of 1995, the attainment of which involves various risks 
and uncertainties. Forward-looking statements may be identified by the use of 
forward-looking terminology such as "may", "will", "expect", "believe", 
"estimate", "anticipate", "continue" or similar terms, variations of those 
terms or the negative of those terms. The Company's actual results may differ 
materially from those described in these forward-looking statements due to, 
among other factors, the results of ongoing research and development 
activities and preclinical testing, the results of clinical trials and the 
availability of additional financing through corporate partnering 
arrangements or otherwise.

RESULTS OF OPERATIONS

     The Company is a development stage pharmaceutical company, with product 
development programs in the areas of cancer and central nervous system 
disorders. Since its inception, the Company's efforts have been principally 
devoted to research and development, including human clinical trials, as well 
as to acquiring licenses and technologies, raising capital and securing 
patent protection. The Company has had approximately $546,000 in grant 
revenue, and has incurred an accumulated deficit through June 30, 1997 of 
approximately $53,000,000. These losses have resulted from expenditures for 
research and development as well as from general and administrative 
activities including legal and professional activities, and are expected to 
continue for the foreseeable future.

     Total revenues for the three months ended June 30, 1997 (the "1997 
quarter") were approximately $111,000, and total revenues for the six months 
ended June 30, 1997 (the "1997 six months") were approximately $148,000. 
There were no revenues for the three months ended June 30, 1996 (the "1996 
quarter") and approximately $50,000 for the six months ended June 30, 1996 
(the "1996 six months").

     Research and development expenses for the 1997 quarter were 
approximately $2,643,000, an increase of $1,121,000 or 74% from the 1996 
quarter. For the 1997 six months, research and development expenses were 
$4,818,000 as compared to $2,350,000 for the 1996 six months, an increase of 
105%. The increases for both the 1997 quarter and the 1997 six months were 
the result of the increased number and activity of the Company's product 
development programs, particularly related to one of its later-stage 
products, Iloperidone, which is ready to commence Phase III clinical trials, 
and human clinical testing of the Company's cancer immunotherapeutic 
products, CeaVac, TriGem and TriAB, which are expected to be in Phase II/III 
clinical trials by year-end 1997. The increases in research and development 
expense were also attributable to sponsored research and contract 
manufacturing for Spheramine, the Company's cell-therapy product for 
Parkinsons's disease, which is now in late-stage pre-clinical testing. 
Acquired in-process research and development of $9,500,000 in the 1997 six 
months reflects an upfront license fee paid by the Company under the HMR 
Agreement with Hoechst, by which the Company acquired exclusive worldwide 
rights to Iloperidone. A portion of this $9,500,000 license fee, $5,500,000, 
was a non-cash charge.

     General and administrative expenses for the 1997 quarter were 
approximately $1,627,000 compared with $1,055,000 for the 1996 quarter, an 
increase of 54%. For the 1997 six months, general and administrative expenses 
were $2,964,000 as compared to $1,976,000 for the 1996 six months, an 
increase of 50%. The increases in general and administrative expense are 
primarily due to the addition to the Company's product portfolio of 
Iloperidone and the cancer therapeutic vaccines. These increased expenses 
have been in the areas of legal fees, patent prosecution and medical, 
marketing and financial consulting fees. As a percentage of total operating 
expenses, general and administrative expenses have decreased from 1996 to 
1997. General and administrative expenses for the 1997 quarter and the 1997 
six months were, in each period, equal to approximately 38% of the Company's 
total operating expenses, while general and administrative expenses in 1996 
were equal to approximately 41% and 46%, respectively, of the Company's total 
operating expenses during the same periods.

                                       8
<PAGE>

     The Company has taken several steps which should help reduce certain 
operating expenses, including, the sale in June 1997 of the GSX technology 
which will reduce the Company's annual payroll expenses by approximately 
$1,100,000. See discussion below and Note 5 of Notes to Financial Statements. 
The Company has also taken steps to reduce its interest expenses due to 
repayment of certain debt obligations as outlined below.

    As a result of the foregoing expenses, the Company incurred an operating 
loss of approximately $4,159,000 during the 1997 quarter compared with 
$2,577,000 for the 1996 quarter. This increase is primarily due to the 
increased number and activity of the Company's clinical development programs. 
For the 1997 six months, the operating loss was approximately $17,134,000 
compared with $4,276,000 for the 1996 six months. The 1997 six months 
operating loss includes a non-recurring charge of $9,500,000 for the 
Iloperidone license, of which $5,500,000 is a non-cash charge, $2,000,000 was 
paid in January and $2,000,000 was paid in July 1997. The Company expects to 
continue to incur substantial research and development costs in the future as 
a result of funding (i) ongoing research and development programs, (ii) 
manufacturing of products for use in clinical trials, (iii) patent and 
regulatory related expenses, and (iv) preclinical and clinical testing of the 
products. Accordingly, the Company expects to incur increasing operating 
losses for the foreseeable future.

     Other income for the 1997 quarter includes a gain of approximately 
$8,514,000 from the sale of GSX, a research technology developed by Ingenex, 
and certain fixed assets. Interest income was approximately $147,000 during 
the 1997 quarter as compared to $263,000 during the 1996 quarter. For the 
1997 six months, interest income was $319,000 compared with $340,000 for the 
1996 six months. Interest expense decreased to approximately $139,000 during 
the 1997 six months from $1,818,000 for the 1996 six months. Approximately 
$1,408,000 of the 1996 expense reflects a non-recurring charge due to the 
repayment in January 1996 of notes issued in a bridge financing. 
Approximately $950,000 of the non-recurring charge represents the unamortized 
portion of the $1,200,000 debt discount, and $458,000 represents debt 
issuance costs. Interest expense for the 1997 quarter was approximately 
$64,000 as compared to $195,000 for the 1996 quarter.

     Other income for the 1997 six months also includes approximately 
$502,000 of losses in the Company's share of Ansan's losses compared to 
$355,000 for the 1996 six months. The Company's share of Ansan's losses for 
the 1997 quarter and the 1996 quarter were $222,000 and $177,000, 
respectively.

LIQUIDITY AND SOURCES OF CAPITAL

     In January 1997, the Company entered into the HMR Agreement with 
Hoechst, effective as of December 31, 1996, pursuant to which it acquired an 
exclusive worldwide license to the antipsychotic agent Iloperidone. Terms of 
the HMR Agreement required the Company to pay Hoechst an upfront license fee 
of $9,500,000, payable as follows:  (i) $2,000,000 in cash on January 20, 
1997; (ii) the issuance of $5,500,000 of common stock (594,595 shares at 
$9.25 per share) on January 20, 1997 (the "Fee Shares"); and (iii) $2,000,000 
in cash on July 18, 1997. During the period from October 1997 through January 
1999, the Company shall be obligated to pay to Hoechst the difference between 
$5,500,000 and the net proceeds received by Hoechst upon the sale of the Fee 
Shares, if such net proceeds are less then $5,500,000. See Note 3 of Notes to 
Financial Statements. The HMR Agreement also provides for future late stage 
milestone payments to Hoechst, based upon successful development of 
Iloperidone, as well as royalty payments on net sales, if any.

     At present, the Company does not have the funds necessary to complete 
the clinical development of Iloperidone and is currently pursuing several 
financing alternatives including corporate partnering arrangements and off 
balance sheet financing to complete development of Iloperidone. There can be 
no assurance that any such financing will be available on acceptable terms, 
if at all. If adequate funds are not available on acceptable terms, the 
Company may be required to delay development of Iloperidone.

     In March 1997, Titan and Ansan entered into an agreement for financing 
pursuant to which Titan advanced Ansan $1,000,000 in return for a debenture 
which was convertible at any time prior to June 21, 1997 into 333,333 shares 
of Ansan common stock (the "Debenture"). The Company did not convert the 
Debenture. The Debenture bears interest at prime plus 2% and is due in April 
1998. In July 1997, the Company entered

                                       9
<PAGE>

into a sublicense agreement with Ansan pursuant to which it acquired an 
exclusive worldwide license to Ansan's butyrate compounds for anti-cancer and 
certain other indications. The sublicense is a component of an Agreement and 
Plan of Reorganization and Merger between Ansan and Discovery Laboratories, 
Inc. ("Discovery"), a privately-held development stage biotechnology company, 
pursuant to which Discovery will be merged with and into Ansan (the 
"Merger"). Upon completion of the Merger, Ansan will repay approximately 
$1,200,000 of outstanding indebtedness to the Company, including the 
Debenture. Titan will pay Ansan a 2% royalty on net sales of such butyrate 
compounds. The sublicense is subject to consummation of the Merger. The 
closing of the Merger is subject to customary closing conditions, including 
approval by the stockholders of Ansan and Discovery.

     On June 4, 1997, Ingenex completed the sale of its GSX System, a 
research technology, and certain fixed assets for $8,722,500 in cash and the 
assumption of certain lease liabilities. Following the close of this 
transaction, the company utilized approximately $1,134,000 of proceeds to 
repay certain debt obligations.

     The Operating Companies have entered into various agreements with 
research institutions, universities, and other entities for the performance 
of research and development activities and for the acquisition of licenses 
related to those activities. The aggregate commitment the Company has under 
these agreements, including minimum license payments, for the next 12 months 
is approximately $2,746,000. Certain of the licenses provide for the payment 
of royalties by the Company on future product sales, if any. In addition, in 
order to maintain license and other rights during product development, the 
Company must comply with various conditions including the payment of patent 
related costs and, in the case of ProNeura, obtaining additional equity 
investments by specified dates.

     The Company expects to continue to incur substantial additional operating 
losses from costs related to continuation and expansion of research and 
development, clinical trials, and increased administrative and fund raising 
activities over at least the next several years. The Company believes that 
its current cash, cash equivalents, and short-term investments will be 
sufficient to sustain operations and maintain the Company's rights under 
current licensing arrangements through approximately the middle of 1998. The 
Company will be required to seek additional financing to continue its 
operations beyond that period. However, the Company's capital requirements 
may change depending on numerous factors including, but not limited to, the 
progress of the Company's research and development programs, the results of 
clinical studies, the timing of regulatory approvals, technological advances, 
determinations as to the commercial potential of the Company's products, and 
the status of competitive products. In addition, expenditures will be 
dependent on the establishment of collaborative relationships with other 
companies, the availability of financing, and other factors. In any event, 
the Company anticipates that it will require substantial additional financing 
in the future for continued operations. There can be no assurance as to the 
availability or terms of any required additional financing, when and if 
needed.

                                       10

<PAGE>

                                       PART II

Item 6.  EXHIBITS AND REPORTS ON FORM 8-K

         (a)  Exhibits
              10.25     Agreement for sale and purchase of assets between the
                        Registrant and Pharmaceuticals Product Development,
                        Inc. dated June 4, 1997
              10.26     Sublicense Agreement between the Registrant and Ansan
                        Pharmaceuticals, Inc. dated July 15, 1997
              11.1      Statement of Computation of Net Income (Loss) Per Share
              27.1      Financial Data Schedule


         (b)  Reports on Form 8-K
              A current report on Form 8-K was filed with the Securities and
              Exchange Commission on May 28, 1997, June 9, 1997 and July 18,
              1997.


                                          11
<PAGE>

                                      SIGNATURES

    In accordance with the requirements of the Exchange Act, the registrant
caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.


                             TITAN PHARMACEUTICALS, INC.

         August 5, 1997
                            By: /s/Louis R. Bucalo
                                ---------------------------------------
                                Louis R. Bucalo,  M.D., President and
                                Chief Executive Officer

         August 5, 1997
                            By: /s/Robert E. Farrell
                                -----------------------------------------------
                                Robert E. Farrell, Chief Financial Officer


                                          12

<PAGE>

                      AGREEMENT FOR SALE AND PURCHASE OF ASSETS


    THIS AGREEMENT FOR SALE AND PURCHASE OF ASSETS ("Agreement") is made and
entered into effective as of this 28th day of May, 1997, by and among
INGENEX, INC., a Delaware corporation whose principal place of business is 1505
O'Brien Drive, Suite B, Menlo Park, California 94025 ("INGENEX"), SUBSIDIARY NO.
3, INC., a North Carolina corporation whose principal place of business is 3151
17th Street Extension, Wilmington, North Carolina 28412 ("SUBSIDIARY"), and
PHARMACEUTICAL PRODUCT DEVELOPMENT, INC., a North Carolina corporation whose
principal place of business is 3151 17th Street Extension, Wilmington, North
Carolina  28412 ("PPD").

                                       RECITALS

    WHEREAS, INGENEX is the current owner of the GSX System, a genomics
platform technology used to identify genes based upon their functional roles in
a biological or disease process and to pinpoint key steps in a disease pathway
for therapeutic intervention (the "GSX System"); and

    WHEREAS, INGENEX desires to sell to SUBSIDIARY and SUBSIDIARY desires to
purchase the GSX System and all tangible and intangible assets, properties,
benefits and rights owned, used or useful in the operation of the business
related to the GSX System (the business and operations related to the GSX System
being referred to herein as the "Business"), upon and subject to the terms and
conditions set forth hereinafter.

                                      AGREEMENT

    NOW, THEREFORE, in consideration of the premises and the mutual promises
and covenants herein contained, and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties, intending
to be legally bound, hereby agree as follows:

                                      ARTICLE 1
                                  ASSETS PURCHASED

    1.1  ACQUIRED ASSETS.  Upon and subject to the terms and conditions set
forth in this Agreement, on the Closing Date (as hereinafter defined) INGENEX
shall sell, assign, transfer and convey to SUBSIDIARY and SUBSIDIARY shall
purchase and acquire from INGENEX the GSX System and all tangible and intangible
properties, assets, benefits and rights owned, licensed (subject to the
limitations of such licenses) or used by or useful to INGENEX in the operation
of the GSX System and the Business (the "Acquired Assets").  The "Acquired
Assets" specifically include the following assets of INGENEX as the same shall
exist on the Closing Date:

<PAGE>

         1.1.1 The machinery, equipment, furniture, tools and fixtures of
INGENEX, used specifically in connection with the Business, wherever located,
and all warranties and claims pertaining thereto, as listed on SCHEDULE 1.1.1
attached hereto (the "Equipment").

         1.1.2 The inventory, laboratory supplies and materials,  and all other
tangible personal property of INGENEX of whatever sort or description used
specifically in connection with the Business (the "Inventory").

         1.1.3  All of INGENEX's rights, title and interest in and to and
benefits under the License Agreements used specifically in connection with the
Business listed on SCHEDULE 1.1.3 attached hereto (the "License Agreements").
License Agreements shall mean and include all of the following items: (i) all
licenses, sublicenses and other agreements as to which INGENEX is a party and
pursuant to which any person is authorized to use any of the Intellectual
Property (as hereinafter defined), and (ii) all licenses, sublicenses and other
agreements as to which INGENEX is a party and pursuant to which INGENEX is
authorized to use any third party patents, trademarks or copyrights, including
software, which are incorporated in, are, or form a part of any INGENEX product
or service that is material to the Business.

         1.1.4 All of INGENEX's rights, title and interest in and to and
benefits under that certain Lease dated March 6, 1996 between Menlo Business
Park and Patrician Associates, Inc. and INGENEX (the "Lease") and relating to
the real property (the "Premises") described in the Lease, and all of INGENEX's
leasehold improvements located on the Premises and any appurtenances thereto,
all as listed on SCHEDULE 1.1.4 attached hereto (the "Lease").  Notwithstanding
the foregoing sentence, INGENEX shall retain ownership of  the "clean room",
which shall be removed from the Premises by INGENEX at its sole expense within 
120 days after the Closing. INGENEX shall be responsible and pay for any damage
to the Premises resulting from the removal of the clean room.

         1.1.5  All patents, patent applications, copyrights, trademarks,
service marks and trade names, inventions, products, trade secrets, proof of
principle, product ideas, works of authorship, processes, copyrightable or
patentable materials, biological material (including cell lines, antibodies,
c-DNAs, antisense nucleotides, proteins, vectors, new chemical entities, media,
reagents and related materials) and any other proprietary information or
intellectual property (whether or not registered) presently owned, licensed or
assigned to INGENEX used in the operation of the GSX System or the Business (the
"Intellectual Property").  SCHEDULE 1.1.5 lists all patents and patent
applications and all registered and unregistered trademarks, trade names and
service marks, registered and unregistered copyrights, and mask works that are
included in the Intellectual Property, including the jurisdictions in which each
such Intellectual Property right has been issued or registered or in which any
application for such issuance and registration has been filed.

         1.1.6  All of INGENEX's rights, title and interest in and to and
benefits under the contracts, permits, agreements, purchase orders and leases,
whether oral or written, used specifically in connection with the Business, as
listed on SCHEDULE 1.1.6 attached hereto (the "Contracts").

         1.1.7  All prepaid expenses incurred in the ordinary course of
business as listed on SCHEDULE 1.1.7 attached hereto (the "Prepaid Expenses").


                                          2

<PAGE>

         1.1.8  Copies of all books, records, client lists, correspondence and
files, business forms, personnel records (to the extent permitted to be
transferred by applicable law) and other information and data in whatever form
recorded pertaining to the Business (the "Records").

         1.1.9  All claims, refunds, causes of action, choses in action, rights
of recovery, warranty rights, rights of offset and rights of recoupment of
INGENEX relating to the operation of the GSX System and the Business (the
"Deposits").

         1.1.10  All other intangible assets owned, used or useful in the
operation of the GSX System and the Business, together with all goodwill and
going concern value relating to the GSX System, the Business and the other
Acquired Assets (the "Goodwill"). 

    1.2  TRANSFER OF ACQUIRED ASSETS.  On the Closing Date (as hereinafter
defined), the Acquired Assets shall be conveyed to SUBSIDIARY by appropriate
transfer documents as follows:  (i) title to the Equipment, Inventory, Prepaid
Expenses, Records, Deposits and Goodwill shall be conveyed pursuant to a Bill of
Sale and Assignment in the form attached hereto as EXHIBIT 1.2A, (ii) title to
the License Agreements shall be conveyed pursuant to an Assignment and
Assumption of License Agreements in the form attached hereto as EXHIBIT 1.2B,
(iii) title to the Contracts shall be conveyed pursuant to an Assignment and
Assumption of Contracts in the form attached as EXHIBIT 1.2C, (iv) title to any
patents or patent applications shall be conveyed pursuant to an Assignment of
Patents and Patent Applications in the form attached hereto as EXHIBIT 1.2D, or
pursuant to such other transfer documents reasonably necessary to convey the
same to SUBSIDIARY, (v) title to the Intellectual  Property (other than patents
and patent applications) presently owned by or assigned to INGENEX shall be
conveyed pursuant to an Intellectual Property Assignment in the form attached
hereto as EXHIBIT 1.2E, and (vi) title to the Lease shall be conveyed pursuant
to an  Assignment, Assumption and Amendment of Lease in the form attached hereto
as EXHIBIT 1.2F.  

    1.3  TITLE TO ACQUIRED ASSETS. On the Closing Date, INGENEX shall deliver
to SUBSIDIARY good title to the Acquired Assets free and clear of any mortgages,
pledges, claims, liens, conditional sales or other agreements, leases,
encumbrances, rights, contracts or other charges of any nature (hereinafter
collectively referred to as "Liens and Encumbrances") other than such Liens and
Encumbrances that have been granted under or attach to the Acquired Assets with
respect to any of the Assumed Liabilities (as hereinafter defined) as set forth
in SCHEDULE 1.3 (the "Accepted Liens and Encumbrances").

    1.4  POSSESSION OF ACQUIRED ASSETS.  INGENEX shall deliver possession of
the  Acquired Assets to SUBSIDIARY at the Premises on the Closing Date.
Possession of the Premises shall be delivered to SUBSIDIARY on the Closing Date
free and clear of all claims, or rights of use or possession other than those
claims or rights created by SUBSIDIARY or PPD or as set forth in the Lease. 
 
                                      ARTICLE 2
                              PURCHASE PRICE AND PAYMENT

    2.1  PURCHASE PRICE. The purchase  price for the Acquired Assets (the
"Purchase Price") shall be Eight Million Seven Hundred Twenty-Two Thousand Five
Hundred Dollars


                                          3

<PAGE>

($8,722,500), which shall be paid by SUBSIDIARY to INGENEX at Closing by
confirmed wire transfer of funds on the Closing Date to the account designated
by INGENEX on SCHEDULE 2.1. 

    2.2  LIMITED ASSUMPTION OF LIABILITIES BY SUBSIDIARY.  On the Closing Date,
INGENEX shall assign to SUBSIDIARY and SUBSIDIARY shall assume, indemnify and
hold harmless INGENEX from any obligations under the License Agreements, the
Contracts and the Lease to the extent related to performance due on or after the
Closing Date (collectively, the "Assumed Liabilities").

    2.3  EXCLUDED LIABILITIES.  Except for the Assumed Liabilities, SUBSIDIARY
and PPD do not assume and shall not assume any debt, obligation, agreement,
contract, lease or any other liability whatsoever of INGENEX of any kind or
nature, absolute or contingent, known or unknown, incurred or arising out of
transactions or operation of the GSX System or the Business or of any other
business of INGENEX prior to the Closing Date (collectively, the "Excluded
Liabilities").  Without limiting the generality of the immediately preceding
sentence, the Excluded Liabilities to be retained by INGENEX shall include the
following:

         2.3.1     All liabilities and obligations of INGENEX to any third
party arising from the breach by INGENEX, prior to the Closing Date, of any
contract, including, without limitation, the License Agreements, the Contracts
and the Lease; 

         2.3.2     All liabilities and obligations of INGENEX for any federal,
state and local income, profits, franchise, capital stock, property, sales, use,
payroll, occupation, excise or other taxes, fees, duties, deficiencies,
assessments, withholdings or other governmental charges of any nature (including
interest, penalties or other additions thereto) (hereinafter, "Taxes"), except
to the extent such liabilities and obligations arise on or after the Closing
Date in connection with the operation of the Business by SUBSIDIARY after the
Closing Date;

         2.3.3     All liabilities and obligations of INGENEX in connection
with the violation of any foreign, federal, state or local law or regulation,
except to the extent such liabilities and obligations arise on or after the
Closing Date in connection with the operation of the Business by SUBSIDIARY
after the Closing Date;

         2.3.4     All liabilities and obligations of INGENEX to its 
collaborative scientific partners, customers, sponsors or other third parties as
a result of any act or omission or arising under any warranties (express or
implied) provided by INGENEX for goods and/or services provided prior to the
Closing Date; 

         2.3.5     All liabilities and obligations of INGENEX, except to the
extent such liabilities and obligations arise on or after the Closing Date in
connection with the operation of the Business by SUBSIDIARY after the Closing
Date for accrued (i) pension benefits, (ii) severance or termination benefits
and (iii) health, life and disability insurance premiums of the employees and
retirees of INGENEX; 

         2.3.6     INGENEX's liabilities to its employees for accrued payroll,
vacation and sick leave arising prior to the Closing Date; and


                                          4

<PAGE>

         2.3.7     All other liabilities and obligations arising out of or
connected with any employee benefit plan (as defined in Section 3(3) of the
Employee Retirement Income Security Act of 1974, as amended ("ERISA")),
maintained at any time by INGENEX or to which INGENEX ever made any
contributions. 

                                      ARTICLE 3
                                CLOSING DATE AND PLACE

    Provided that all conditions precedent to Closing shall have been satisfied
or waived by the appropriate party, the closing of the transactions contemplated
by this Agreement (the "Closing") shall occur on or before May 30, 1997 (the
"Closing Date"), or on such earlier or later date as may be set by mutual
agreement of the parties. The Closing shall occur at such place, time and
location and in such manner as is mutually acceptable to the parties.
Notwithstanding anything herein to the contrary, if the Closing has not occurred
on or before May 30, 1997 (except that if any of the conditions set forth in
Articles 8 or 9 Section 8.8.7, 8.8.12, 8.8.13, 8.8.14, 9.6.6 or 9.6.9 have not
been satisfied by May 30, 1997, then each party shall have until June 6, 1997 to
satisfy such conditions), then either INGENEX or PPD or SUBSIDIARY shall have
the right to terminate this Agreement, each by providing notice to the other,
whereupon, subject to the following, this Agreement shall become null and void
and of no further force or effect.  Notwithstanding the termination of this
Agreement, such termination shall be without prejudice to a party's rights and
remedies as a result of any breach or default on the part of another party. 

                                      ARTICLE 4
                                ADDITIONAL AGREEMENTS

    4.1  EMPLOYMENT AGREEMENTS WITH CERTAIN KEY EMPLOYEES.  Effective as of the
Closing Date, SUBSIDIARY shall enter into employment agreements with each of
Mark E. Furth, Ph.D. and Tatyana Holzmayer, Ph.D. in the form of EXHIBITS 4.1A
and 4.1B, respectively.

    4.2  CONSULTING AGREEMENTS WITH CERTAIN KEY PERSONS.  Effective as of the
Closing Date, INGENEX shall amend its existing Consulting Agreements dated May
20, 1992 between INGENEX (formerly Pharm-Gen Systems, Ltd.) and each of Igor
Roninson, Ph.D. and Richard L. Davidson, Ph.D. and its Scientific Advisory and
Consulting Agreement dated January 1, 1994 with Eli Gilboa, Ph.D., in each case
in form and substance satisfactory to each of the parties thereto and to PPD and
SUBSIDIARY.  Each of such amendments shall: (i) prohibit the consultant from
providing consulting services to INGENEX after the Closing with respect to the
GSX System or the Business, and (ii) provide that any consulting services
provided to PPD or SUBSIDIARY with respect to the GSX System or the Business
following the Closing shall not be considered violations of any of the
provisions of such Consulting Agreements.  Effective as of the Closing Date,
INGENEX shall terminate all consulting or similar agreements (oral or written)
with Andrei Gudkov, Ph.D.  Effective as of the Closing Date, SUBSIDIARY shall
enter into new consulting agreements with each of Andrei Gudkov, Ph.D. and Eli
Gilboa, Ph.D. in the form of EXHIBITS 4.2A and 4.2B, respectively. SUBSIDIARY
shall have the right (but not obligation) to negotiate and enter into new
consulting agreements with each of Igor Roninson, Ph.D. and Richard L. Davidson,
Ph.D. with respect to the GSX System and the Business upon such terms and
conditions which are mutually acceptable to the parties.

                                          5

<PAGE>

    4.3  OTHER EMPLOYEES.  SUBSIDIARY shall have the right to employ and shall
employ each of the employees of INGENEX identified on SCHEDULE 4.3 effective as
of the Closing Date; provided, however, that this Agreement shall not be
construed to create any contractual employment rights in any of such employees
hired by SUBSIDIARY other than as employees terminable at any time at will.  As
a condition of such employment by SUBSIDIARY, each employee must execute a
standard Proprietary Information and Inventions Agreement with and for the
benefit of SUBSIDIARY.

         4.4  NEW LEASE WITH PHOENIX CAPITAL.  With respect to the equipment
listed on SCHEDULE 4.4, effective on or before the Closing Date, INGENEX shall
have caused such equipment to be released from and no longer subject to any of
the provisions of that certain Master Equipment Lease dated February 15, 1994
(the "Current Lease") between Phoenix Leasing Incorporated ("Phoenix") and Titan
Pharmaceuticals, Inc. ("TITAN") and that certain Sublease and Acknowledgment of
Assignment dated February 15, 1994 between TITAN, INGENEX, Geneic Sciences,
Inc., Theracell, Inc. and Ansan, Inc. The form and substance of such releases
shall be reasonably satisfactory to PPD. SUBSIDIARY shall negotiate in good
faith for a new equipment lease with Phoenix, which equipment lease shall be
upon such terms and conditions reasonably satisfactory to SUBSIDIARY and PPD. 
PPD and SUBSIDIARY acknowledge that a new lease with terms and conditions
substantially similar to the Current Lease with respect to such equipment shall
be deemed reasonably satisfactory.

         4.5  GUARANTY OF LEASE BY PPD.  If required by the landlord as a
condition to assignment of the Lease to SUBSIDIARY and to the release of TITAN
from any obligations with respect to the Lease, PPD agrees to guarantee the
payment of rent under the Lease.  Any such guaranty required of PPD shall be
upon such terms and conditions as shall be reasonably satisfactory to PPD.  PPD
acknowledges that a guarantee substantially similar to that executed by TITAN in
connection with the Current Lease shall be deemed reasonably satisfactory.

         4.6  RELEASE OF  GSE LICENSE AGREEMENT FROM ABERLYN CAPITAL AGREEMENT. 
Effective prior to or as of the Closing Date, INGENEX shall cause that certain
GSE Exclusive License Agreement dated as of May 6, 1992 between The Board of
Trustees of the University of Illinois and INGENEX (formerly Pharm-Gen Systems,
Ltd.) to be released from and no longer subject to the provisions of the License
Assignment and License Agreement between INGENEX and Aberlyn Capital Management
Limited Partnership dated January 31, 1995 (as then in effect).  The form and
substance of such release shall be reasonably satisfactory to PPD.

         4.7  TERMINATION OF CERTAIN EMPLOYMENT AGREEMENTS. Effective as of the
Closing Date, INGENEX shall terminate the Employment Agreement between INGENEX
and Mark E. Furth, Ph.D. dated July 25, 1995 and shall release Mark E. Furth,
Ph.D. from any further liabilities or obligations thereunder, including
specifically any restrictive covenants related to the Business. Effective as of
the Closing Date, INGENEX shall terminate the Employment Agreement between
INGENEX and Tatyana Holzmayer, Ph.D. dated August 9, 1993 and shall release
Tatyana Holzmayer, Ph.D. from any further liabilities or obligations thereunder,
including specifically any restrictive covenants related to the Business. 

         4.8  RELEASE FROM PROPRIETARY INFORMATION AGREEMENTS.  Effective as of
the Closing Date, INGENEX shall release each of Mark E. Furth, Ph.D. and Tatyana
Holzmayer, Ph.D. from their respective Proprietary Information and Inventions
Agreement, dated July 25, 1995 and


                                          6

<PAGE>

August 9, 1993, respectively, to the extent that such agreements relate to the
GSX System, the Business or the Acquired Assets. Effective as of the Closing
Date, INGENEX shall release each employee listed on SCHEDULE 4.3 who is hired by
either PPD or SUBSIDIARY from their respective Proprietary Information and
Inventions Agreements to the extent that such agreements relate to the GSX
System, the Business or the Acquired Assets.  All such releases hereunder shall
be in the form of EXHIBIT 4.8 attached hereto. 

    4.9  ALLOCATION OF PURCHASE PRICE.  By mutual agreement of the parties, the
total consideration payable hereunder for the Acquired Assets (which comprises
the Purchase Price and the value of all Assumed Liabilities) shall be allocated
among the various Acquired Assets pursuant to SCHEDULE 4.9 to be prepared by the
parties and attached as of Closing.  The allocations will be made by SUBSIDIARY
in a manner reasonably acceptable to INGENEX and consistent with the residual
method of accounting.  SUBSIDIARY and INGENEX agree that the allocation set
forth in SCHEDULE 4.9 shall be used by them for all tax purposes, including, but
not limited to, reporting pursuant to Section 1060 of the Code.  In preparing
and filing IRS Form 8594 ("Asset Acquisition Statement Under Section 1060"),
SUBSIDIARY and INGENEX shall report that the allocation of consideration set
forth herein and the fair market value of the assets to which such consideration
is allocated is the same.  Prior to filing Form 8594 with respect to the
transaction described herein, INGENEX and SUBSIDIARY shall provide to one
another a true and correct copy of the Form 8594 which each intends to file with
respect to this transaction.

    4.10 BULK SALES LAWS.  PPD and SUBSIDIARY hereby waive compliance by
INGENEX with the provisions of any applicable state bulk transfer statutes and
INGENEX covenants and agrees to pay and discharge when due all claims of
creditors asserted against either PPD or SUBSIDIARY or any of their affiliates
by reason of any failure of INGENEX to so comply, and to indemnify PPD and
SUBSIDIARY and its affiliates fully in respect thereof, which indemnity shall
survive Closing.

    4.11 ADJUSTMENTS.  Rent, real estate taxes, water, sewer, and other current
lienable charges, if any, relating to the Premises shall be apportioned as of
the Closing Date on the basis of the fiscal year of the taxing body or the
period covered by such charges.  INGENEX shall be responsible for any benefit
assessments assessed or levied against the Premises prior to the Closing Date. 
PPD shall be responsible for any benefit assessments assessed or levied against
the Premises on or after the Closing Date.  The security deposit of Twenty-Seven
Thousand Two Hundred Twelve and 40/100 Dollars ($27,212.40) that INGENEX has
paid to the landlord pursuant to the Lease shall be treated as a prepaid item
for which SUBSIDIARY shall reimburse INGENEX at Closing in exchange for
assignment to SUBSIDIARY of all of INGENEX's rights and interests in the
security deposit. 

    4.12 REALTY TRANSFER TAX.  INGENEX shall pay any realty transfer taxes
required to be paid as a result of the conveyance of the Lease to SUBSIDIARY.

    4.13 NON-COMPETITION AGREEMENT OF INGENEX.  At Closing, INGENEX shall
execute a certain non-competition agreement (the "Non-Competition Agreement") in
the form attached hereto as EXHIBIT 4.13. 

    4.14 POST-CLOSING ACCESS TO RECORDS. Following the Closing Date, INGENEX
shall provide PPD or SUBSIDIARY during normal business hours reasonable access
to and shall permit


                                          7

<PAGE>

either of them to make reasonable numbers of copies of financial records and
other information related to operation of the GSX System and the Business prior
to the Closing (to the extent that such records or other information exists) for
the purpose of preparing audited financial statements covering any period prior
to the Closing Date and for such other purposes as PPD or SUBSIDIARY may
reasonably request from time to time.  Following the Closing Date, PPD and
SUBSIDIARY shall provide INGENEX during normal business hours reasonable access
to and shall permit INGENEX to make reasonable numbers of copies of the Records
for such purposes as INGENEX may reasonably request from time to time.  Any
copies or other activities undertaken by a party pursuant to this Section 4.14
shall be done at such party's sole cost and expense.

    4.15 POST-CLOSING ACCESS TO CERTAIN PERSONNEL. For a period of up to twelve
(12) months following the Closing Date, PPD and SUBSIDIARY shall permit INGENEX
to use the services of certain technical personnel of SUBSIDIARY upon providing
reasonable advance notice to, and obtaining the consent of, an officer of
SUBSIDIARY.  Such services shall not relate to the GSX System or the Business
and shall not interfere in any manner with SUBSIDIARY's operation of its
business.   In consideration for any services provided hereunder, INGENEX shall
pay to SUBSIDIARY fees based upon an effective hourly rate of  $75.00.  Such
fees shall be paid within fifteen (15) business days after receipt of an invoice
therefor.  Notwithstanding the foregoing, SUBSIDIARY agrees that Mark E. Furth,
Ph.D., and such other personnel of SUBSIDIARY as he may designate, shall
prepare, on behalf of INGENEX, certain due diligence reports required under the
License Agreements without payment of any amount therefor by INGENEX to
SUBSIDIARY or any other party.

                                      ARTICLE 5
                      REPRESENTATIONS AND WARRANTIES OF INGENEX

    In order to induce PPD and SUBSIDIARY to consummate the transactions
referred to in this Agreement, INGENEX represents, warrants and covenants to and
with PPD and SUBSIDIARY as follows:

    5.1  ORGANIZATION AND GOOD STANDING.  INGENEX is a corporation which is
duly organized and validly existing and in good standing under the laws of the
State of Delaware, and has the requisite power and authority to own, license or
lease the Acquired Assets and to conduct its business as now conducted.  INGENEX
is duly qualified to do business and is in good standing as a foreign
corporation in each jurisdiction where the character of the properties it owns,
licenses or leases or the nature of its business makes such qualification
necessary except where the failure to so qualify would not have a material
adverse effect on the Business.  SCHEDULE 5.1 lists all the states where INGENEX
is so qualified.  

    5.2   POWER AND AUTHORITY.  INGENEX has full right, power and authority to
enter into this Agreement and each of the Transaction Documents (as hereinafter
defined) to which it is a party and to perform its obligations under this
Agreement and the Transaction Documents.  The execution and delivery of this
Agreement and the Transaction Documents and the performance by INGENEX of its
obligations hereunder and thereunder have been duly authorized by all requisite
corporate action, and no further action or approval is required in order that
this Agreement shall be binding upon it and enforceable against it in accordance
with its terms, subject only to bankruptcy, insolvency, reorganization,
moratorium and other laws or equitable principles affecting creditors' rights
generally.  INGENEX represents and warrants that no


                                          8

<PAGE>

approval of the shareholders of INGENEX is required by Delaware Law, its
Certificate of Incorporation or Bylaws in connection with the consummation of
the transactions contemplated by this Agreement.  For purposes of this
Agreement, "Transaction Documents" means each of the agreements, documents and
instruments referenced in this Agreement to be executed and delivered by
INGENEX, PPD and/or SUBSIDIARY, as appropriate.

    5.3  LITIGATION.  There are no actions, suits, proceedings or
investigations pending or, to the knowledge of INGENEX, threatened, at law or in
equity, before or by any foreign, federal, state, municipal or other
governmental instrumentality which involve any judgment or liability, against
INGENEX, in each case as it relates to the Business, or which may result in any
material adverse change in the Business or the Acquired Assets.  INGENEX is not,
with respect to the Business, subject to or in violation of any order, writ,
injunction or decree of any court or foreign, federal, state, municipal or other
governmental department, commission, board, bureau or instrumentality.

    5.4  COMPLIANCE WITH CONTRACTS. INGENEX has delivered to SUBSIDIARY true
and complete copies of the Contracts and the License Agreements, together with
all amendments and supplements thereto and modifications thereof. Each of the
License Agreements, each of the Contracts and the Lease is valid, in full force
and effect and binding upon INGENEX and, to the knowledge of INGENEX, all other
parties thereto in accordance with its terms.  INGENEX is not in default under,
nor to the knowledge of INGENEX has any event occurred which, with a lapse of
time or notice or both, could result in a default under any of the Contracts,
the License Agreements, the Lease or under any outstanding note, indenture,
mortgage, instrument, contract or agreement relating to the Business to which
INGENEX is a party or by which the Premises or the Acquired Assets are bound,
except as disclosed in SCHEDULE 5.4.  INGENEX is not and will not be at Closing
in violation of any provision of its Certificate of Incorporation or Bylaws. 
The execution, delivery and performance of this Agreement, except as disclosed
in SCHEDULE 5.4, and the Transaction Documents and consummation of the
transactions contemplated hereby and thereby will not (i) violate, conflict with
or result in a breach of or constitute a default (or an event which, with notice
or lapse of time or both, would constitute a default) under the Contracts, the
License Agreements, the Lease or any outstanding note, indenture, mortgage,
instrument, contract or agreement relating to the Business to which INGENEX is a
party or by which the Premises or the Acquired Assets are bound, (ii) result in
the creation of any lien, security interest, charge or encumbrance upon or have
a material adverse effect on the Acquired Assets or the Premises, or (iii)
violate any of the terms, conditions or provisions of the Certificate of
Incorporation or Bylaws of INGENEX.  INGENEX has not received any advance
payments or other consideration with respect to any of the Contracts relating to
services which have not been or will not be performed prior to the Closing.

    5.5  COMPLIANCE WITH LAWS.  INGENEX conducts the Business in compliance
with all laws, statutes, regulations, rules, ordinances or orders applicable to
INGENEX or to the operation of the Business except where the failure to so
comply would not have a material adverse effect on the Business.  The execution,
delivery and performance of this Agreement and the Transaction Documents and
consummation of the transactions contemplated hereby and thereby will not result
in the termination, modification or acceleration of any order, writ, injunction,
decree, or any statute, rule or regulation, applicable to the Business, the
Acquired Assets or the Premises.


                                          9
<PAGE>

    5.6  TAX RETURNS AND TAXES. INGENEX will have filed on or before the
Closing Date or shall file on a timely basis with all appropriate governmental
agencies (whether foreign, federal, state or local) all returns required to be
filed by it with respect to Taxes, all of which will have been prepared
accurately and in conformity with all laws and regulations applicable thereto.
To INGENEX'S knowledge, no Tax returns of INGENEX have been examined or are
under examination by any foreign, federal, state or local agency with
examination responsibility thereover for the fiscal years presently open under
applicable statutes of limitation, and no assessments or deficiencies for such
fiscal years of INGENEX have been made or are now owning.  There are in effect
no waivers of the applicable statutes of limitation for Taxes for any period. 
There are in effect no agreements for an extension of time with respect to the
filing of any Tax return of INGENEX.

    5.7  FINANCIAL STATEMENTS.  Prior to Closing INGENEX shall deliver to PPD
and SUBSIDIARY audited balance sheets, income statements, and statements of
retained earnings and cash flows for the fiscal years ending December 31, 1994,
December 31, 1995 and December 31, 1996.  Said statements, together with an
unaudited interim balance sheet (the "Balance Sheet") and related statements of
income for the period ended March 31, 1997 are collectively hereinafter called
the "Financial Statements".  Each of the Financial Statements shall be in
accordance with the books and records of INGENEX and taken as a whole present
fully and fairly the financial position of INGENEX at the dates indicated, and
the results of operations for the periods indicated, and (except for the March
31, 1997 Financial Statements) have been prepared in accordance with generally
accepted accounting principles, consistently applied. 

    5.8  ABSENCE OF UNDISCLOSED LIABILITIES.  There are no debts, liabilities
or obligations either accrued, absolute, contingent or otherwise with respect to
the Business except (i) those arising in the ordinary course of business, and
(ii) those which are incurred in accordance with this Agreement.

    5.9  PERMITS, LICENSES AND CONSENTS.  Attached hereto as SCHEDULE 5.9 is a
list of: (i) all material governmental permits, licenses, registrations,
approvals and other authorizations that to the best of the knowledge of INGENEX
are required for the operation of the Business as presently operated and that if
not obtained would have a material adverse effect on the Business (the
"Permits"), and (ii) governmental and non-governmental third-party consents
which INGENEX knows are required to consummate fully the transactions
contemplated by this Agreement.  All such Permits are valid and outstanding,
INGENEX has duly complied, in all material respects, with all of the terms and
conditions of each Permit held by it, and no Permit has ever been revoked,
canceled or suspended or the subject of any investigation or proceeding for the
suspension, revocation or cancellation thereof.  INGENEX will use its best
efforts to determine which filings are required to be made and which consents
are required to be obtained prior to the Closing Date in connection with the
execution and delivery of this Agreement and the consummation of the
transactions contemplated hereby and to timely file such filings and to timely
obtain all such consents.

    5.10 TITLE TO ACQUIRED ASSETS.  On the Closing Date, INGENEX will own and
have good title to all of the Acquired Assets (including without limitation the
Lease and the leasehold improvements on the Premises), free and clear of any
Liens and Encumbrances other than the Accepted Liens and Encumbrances.


                                          10

<PAGE>

    5.11 CONDITION OF ACQUIRED ASSETS.  Except as disclosed on SCHEDULE 5.11
all Equipment and Inventory of INGENEX and all pieces of equipment listed on
SCHEDULE 4.4 are currently operational, free and clear of known defects, and are
suitable for use in the manner in which they are currently employed in the
Business, and on the Closing Date shall be in the same condition as on the date
of this Agreement, normal wear and tear excepted. 

    5.12 USE OF PREMISES.  INGENEX has no knowledge of any condition on the
Premises which would unreasonably interfere with the use of the Premises by
SUBSIDIARY in the conduct of the Business.  To the knowledge of INGENEX, there
are no zoning restrictions or other restrictions upon the use of the Premises,
which, either individually or in the aggregate, adversely affect the use or
construction of the Premises and improvements located thereon as presently used
or constructed.   To the knowledge of INGENEX, none of the Premises and
improvements located thereon, or the use, occupancy, operation or maintenance
thereof, or any substance, material or condition thereon, is in violation of any
restriction, covenant, or laws (including, without limitation, any building,
zoning, health, fire, safety or other ordinance, code or regulation) the
violation of which would have a material adverse effect on the Business, the
Premises or the Acquired Assets.  No notice has been served upon INGENEX or upon
the Premises claiming violation of any restriction, covenant, or laws
(including, without limitation, any building, zoning, health, fire, safety or
other ordinance, code or regulation), or requiring or calling attention to the
need for any work, repairs, construction, alterations, or installation in
connection with the Premises or improvements thereon or claiming any monies due
with respect thereto.

    5.13 LEASE.  INGENEX has delivered to SUBSIDIARY true and complete copies
of the Lease, together with all amendments and supplements thereto and
modifications thereof.  The Lease is valid and effective and enforceable by
INGENEX in accordance with its terms.  INGENEX has the right of quiet enjoyment
of all property leased to it under the Lease for the full term of the Lease and
any renewal options thereto (provided such renewal options, if any, are properly
exercised), and, to the knowledge of INGENEX, no leasehold interest of INGENEX
under the Lease is subject to or subordinate to any security interest, lease,
encumbrance or other burden, except as set forth on SCHEDULE 5.13.  There is no
material default (or event which, with the passage of time or notice, would
constitute a material default) or claim of material default known by INGENEX to
be pending or asserted against INGENEX by any party to the Lease. INGENEX
further represents to SUBSIDIARY that INGENEX has no ownership of any real
estate or leasehold interest in real estate other than the Lease.

    5.14 LICENSE AGREEMENTS.  Except as set forth in SCHEDULE 5.14, INGENEX
represents, warrants and covenants that:

         5.14.1    The License Agreements are currently subsisting and have not
been adjudged invalid or unenforceable by any court or tribunal. Each of the
License Agreements is valid and enforceable and INGENEX is not aware of any
claim by any third party that any of the License Agreements is invalid or
unenforceable.

         5.14.2    Subject to the rights reserved under the License Agreements,
INGENEX is the sole and exclusive owner of the right, title and interest in and
to the License Agreements free and clear of any Liens and Encumbrances other
than the Accepted Liens and Encumbrances.


                                          11

<PAGE>

         5.14.3    All licenses and other agreements applicable to the License
Agreements are the valid and binding obligations of all of the parties thereto
and are enforceable against each of such parties in accordance with their
respective terms; provided that, with respect to any such parties other than
INGENEX, such representation and warranty is made to the knowledge of INGENEX. 
INGENEX has not entered into, and will not enter into prior to the Closing, any
currently subsisting or future license agreements with respect to any of the
License Agreements without PPD's prior written consent.

         5.14.4    Subject to the rights reserved under the License Agreements,
INGENEX has and shall continue to have through the Closing the exclusive right
to make, sell, practice and use all the inventions set forth in License
Agreements (other than uses by others pursuant to agreements set forth in
SCHEDULE 5.14 hereto) throughout the countries of issue, free and clear of any
and all Liens and Encumbrances or other restrictions on INGENEX's right to
protect or enforce any of the License Agreements against any third party.

         5.14.5    No effective financing statement, security agreement,
assignment, license or transfer or notice of any of the foregoing or of any lien
covering any of  the License Agreements is on file or record in any office or
agency of any foreign country or any intergovernmental organization, or any
other governmental or regulatory authority, agency or recording office, and
INGENEX has no knowledge of any such filing.

         5.14.6    No claim has been made to INGENEX that either the License
Agreements or INGENEX's use, sale or practice thereof does or may violate the
rights of any third party.  There has been no decision adverse to INGENEX's
claim of exclusive ownership rights (subject to the rights reserved under the
License Agreements) in the License Agreements or exclusive rights to use, sell
and practice the License Agreements in the United States (and all possessions
and territories thereof) or, to the knowledge of INGENEX, after good faith
inquiry with the appropriate officers and  legal counsel of INGENEX without
further investigation, in any other country or to keep and maintain the License
Agreements in full force and effect and no proceeding involving said rights is
to the knowledge of INGENEX, after good faith inquiry with the appropriate
officers and legal counsel of INGENEX without further investigation, threatened
or pending before or in any patent or similar office or agency of the United
States, of any state or foreign country, or of any intergovernmental
organization, or in any court or tribunal.

         5.14.7    To the knowledge of INGENEX, after good faith inquiry with
the appropriate officers and  legal counsel of INGENEX without further
investigation, there is no event which does or reasonably could materially
adversely affect the value of any of the License Agreements, or its ability to
transfer any of the License Agreements, or the rights and remedies of INGENEX in
relation to any of the License Agreements.

         5.14.8    INGENEX has at all times in the past used all statutory and
other appropriate symbols, notices or legends of ownership of the patents
licensed under the License Agreements, except where the failure to so use would
not have a material adverse effect on the material rights available with respect
to the License Agreements under all applicable laws.

         5.14.9    INGENEX has not and will not prior to the Closing abandon or
dedicate to the public any of the patents licensed under the License Agreements,
or do any act of a character that tends to cause or contribute to the
abandonment or dedication to the public of any of the patents



                                          12

<PAGE>

licensed under the License Agreements, or do or omit to do any act of a
character that tends to negate, hinder, prevent, restrain or retard such
abandonment, dedication to the public, loss, or other adverse effect.

         5.14.10  To the knowledge of INGENEX, after good faith inquiry with
the appropriate officers and  legal counsel of INGENEX without further
investigation, there is at present no material infringement or unauthorized or
other improper use of the patents or rights licensed under the License
Agreements inconsistent with INGENEX's rights in the License Agreements.

         5.14.11  INGENEX has secured from all consultants to and employees of 
INGENEX who contributed in a material manner to the creation or development of
any proprietary or potentially valuable rights related to the License Agreements
thereunder valid written assignments of the rights to such contributions that
are material to the Business of INGENEX and which INGENEX does not already own
by operation of law (subject to the limitations set forth in any such consulting
agreements).

    5.15 INTELLECTUAL PROPERTY.  With respect to the Intellectual Property and
except as set forth on SCHEDULE 5.15, INGENEX represents, warrants and covenants
that:

         5.15.1    INGENEX owns or is licensed or otherwise possesses legally
enforceable rights to use all the Intellectual Property that is used in the
Business as currently conducted by INGENEX.  

         5.15.2    To the knowledge of INGENEX, there is no material
unauthorized use, disclosure, infringement or misappropriation by any third
party (including employees and former employees of INGENEX) of any of the
Intellectual Property rights. INGENEX has not entered into any agreement to
indemnify any other person against any charge of infringement of any the
Intellectual Property, other than standard indemnification provisions contained
in contracts arising in the ordinary course of business and in the License
Agreements.

         5.15.3    To the knowledge of INGENEX:  (i) all patents, registered
trademarks, service marks and copyrights which are included in the Intellectual
Property and held by INGENEX are valid and subsisting, and (ii) the marketing,
licensing or sale of the Intellectual Property does not infringe any patent,
trademark, service mark, copyright, trade secret or other proprietary right of
any third party.  INGENEX has not brought any action, suit or proceeding for
infringement of the Intellectual Property or breach of any license or agreement
involving the Intellectual Property against any third party.

         5.15.4    INGENEX has secured from all consultants to and employees of
INGENEX who contributed in a material manner to the creation or development of
the Intellectual Property valid written assignments of the rights to such
contributions that are material to the Business of INGENEX and which INGENEX
does not already own by operation of law (subject to the limitations set forth
in any such consulting agreements).

         5.15.5    All use, disclosure or lawful appropriation of any of the
Intellectual Property owned by INGENEX and licensed to a third party has been
pursuant to the terms of a written agreement between INGENEX and such third
party. All use, disclosure or lawful


                                          13

<PAGE>

appropriation of the Intellectual Property not owned by INGENEX and licensed
from a third party has been pursuant to the terms of a written agreement between
INGENEX and the owner of the Intellectual Property, or is otherwise lawful.

    5.16 SUFFICIENCY OF ASSETS.  The Acquired Assets constitute all of the
assets and properties used by INGENEX in the Business during the past six (6)
months, except for Inventory which has been consumed or has been disposed of in
the ordinary course of business.  There is no significant asset used or required
by INGENEX in the conduct of the Business (as heretofore conducted) which is not
either owned by INGENEX or licensed or leased to it and listed in one of the
Schedules attached hereto.

    5.17 PENSION PLANS.  Each of the Retirement Plans (as hereinafter defined)
has been operated in all material respects in conformity with applicable plan
documents, the Code, applicable regulations thereunder and ERISA and has met all
reporting requirements thereunder in all material respects. "Retirement Plans"
means any employee pension benefit plan (including, without limitation, any
multi-employer pension plan) as defined in Section 3(2) of ERISA or under any
other state or federal statute regulating pension plans which INGENEX has
maintained, participated in or made contributions to on behalf of any of its
employees.

    5.18 CAFETERIA AND WELFARE BENEFIT PLANS.  Each program operated by INGENEX
and purporting to provide for the exclusion from income by INGENEX's employees
of amounts pursuant to Code Section 125 (and each other program relating
thereto) has been operated in all material respects in conformity with
applicable plan documents, the Code, applicable regulations thereunder and ERISA
and has met all reporting requirements thereunder in all material respects.  All
"employee welfare benefit plans" (as such term is defined in ERISA) heretofore
operated by INGENEX or any Related Party have been operated in all material
respects in conformity with applicable plan documents, the Code, applicable
regulations thereunder and ERISA and has met all reporting requirements
thereunder.

    5.19 LABOR RELATIONS.  The employees of INGENEX have not in the past and
are not presently represented by a union or any other agent or representative
and INGENEX is not a party to a collective bargaining agreement with its
employees.  There have been no attempts by a union or other representative to
organize the employees of INGENEX.

    5.20 EMPLOYMENT MATTERS.  SCHEDULE 5.20 attached hereto sets forth for the
employees of INGENEX identified on SCHEDULE 4.3, the names, positions, dates of
hire, and weekly salaries or hourly wages, of such employees as of the date
hereof, together with the dates of their last pay increases and the amount of
bonuses and description of agreements or arrangements for commissions and other
compensation or benefits to be paid or provided to any of such persons
including, without limitation vacation, sick leave, medical, dental, health
insurance or other similar plans or arrangements, Internal Revenue Service
qualified or otherwise maintained or provided by INGENEX and covering or
applying to any or all of such employees.

    5.21 ENVIRONMENTAL CONDITION OF PREMISES; COMPLIANCE WITH ENVIRONMENTAL
LAWS. INGENEX has no knowledge that INGENEX has released or disposed of
petroleum products or any toxic or hazardous waste or substance on the Premises.
INGENEX has been at all times in compliance with all applicable federal, state
or local laws, codes and ordinances and all rules and regulations promulgated
thereunder (collectively "Environmental Laws") regarding (i) the use,


                                          14
<PAGE>

generation, or disposal of "toxic or hazardous substances or wastes" (intended
hereby and hereafter to include any and all "toxic" or "hazardous materials" or
"hazardous wastes" as defined in applicable Environmental Laws) and petroleum
products (including crude oil or any fraction thereof) regardless of the
intended use of such petroleum products and regardless of whether defined by any
law to be a toxic or hazardous substance or waste; (ii) the transportation of
toxic or hazardous substances or wastes provided by any suppliers of INGENEX for
use in its operations (and for which transportation INGENEX is or has been
legally responsible under applicable Environmental Laws); (iii) the storage of
such toxic or hazardous substances or wastes on-site or off-site prior to their
use or processing; (iv) the storage of toxic or hazardous substances or wastes
generated by INGENEX in the course of such use or processing, and the
transportation of toxic or hazardous substances or wastes to the ultimate site
of their disposal except in each case, where the failure to so comply would not
have a material adverse effect on the Business. All, if any, arrangements with
third parties regarding disposal, or the transportation for disposal, of toxic
or hazardous substances or wastes of INGENEX have been made in conformity with
all applicable Environmental Laws except where the failure to so conform would
not have a material adverse effect on the Business.

    5.22 NO BROKERS.  No broker, finder, agent or other person claiming to have
acted in any such capacity for or under the authority of INGENEX is entitled to
any fee or commission arising out of the transactions contemplated herein.   

    5.23 INSURANCE.  There is presently in force fire, theft and general
casualty insurance covering the Acquired Assets and the Premises for their full
insurable value and INGENEX shall maintain such insurance in force until the
Closing Date.

    5.24 NO FALSE OR MISLEADING STATEMENTS.  No representation or warranty
relating to INGENEX contained in this Agreement, nor any certificate furnished
or to be furnished by INGENEX pursuant to this Agreement when taken or read
together as a whole, contains or shall contain any untrue statement of a
material fact or omits or will omit to state a material fact necessary to make
any representation or warranty contained herein, in light of the circumstances
under which made,  not misleading.  All Schedules and updates thereto have been
and are true, correct and complete.

                                      ARTICLE 6
                 REPRESENTATIONS AND WARRANTIES OF PPD AND SUBSIDIARY

    In order to induce INGENEX to consummate the transactions referred to in
this Agreement, each of PPD and SUBSIDIARY, jointly and severally, represents,
warrants and covenants to and with INGENEX as follows:

    6.1  ORGANIZATION AND GOOD STANDING.  Each of PPD and SUBSIDIARY is a
corporation duly constituted, validly existing and in good standing under the
laws of the State of North Carolina and has the requisite power and authority to
own, license or lease its assets and properties and conduct its business as now
conducted.

    6.2  POWER AND AUTHORITY.  PPD and SUBSIDIARY each has full right, power
and authority to enter into this Agreement and each of the Transaction


                                          15

<PAGE>

Documents to which it is a party and to perform their respective obligations 
under this Agreement and the Transaction Documents.  The execution and delivery
of this Agreement and the Transaction Documents to which PPD or SUBSIDIARY is a
party and the performance by each of them of their respective obligations
hereunder and thereunder have been duly authorized by their respective boards of
directors, and no further action or approval is required in order that this
Agreement and the Transaction Documents shall be binding upon each of them and
enforceable against each of them in accordance with its terms, subject only to
bankruptcy, insolvency, reorganization, moratorium and other laws or equitable
principles affecting creditors' rights generally.

    6.3  COMPLIANCE WITH CONTRACTS. The execution, delivery and performance of
this Agreement and the Transaction Documents and consummation of the
transactions contemplated hereby and thereby will not (i) violate, conflict with
or result in a breach of or constitute a default (or an event which, with notice
or lapse of time or both, would constitute a default) under any outstanding
note, indenture, mortgage, instrument, contract or agreement to which either PPD
or SUBSIDIARY is a party or by which either of them or their respective assets
are bound, or (ii) violate any of the terms, conditions or provisions of the
Articles of Incorporation or Bylaws of PPD or SUBSIDIARY.

    6.4  NO BROKERS.  No broker, finder, agent or other person claiming to have
acted in any such capacity for or under the authority of PPD or SUBSIDIARY is
entitled to any fee or commission arising out of the transactions contemplated
herein other than professional fees for the attorneys and accountants
representing PPD or SUBSIDIARY, which professional fees shall be paid solely by
PPD or SUBSIDIARY.

    6.5  NO FALSE OR MISLEADING STATEMENTS.  No representation or warranty
relating to PPD or SUBSIDIARY contained in this Agreement, nor any certificate
furnished or to be furnished by PPD or SUBSIDIARY pursuant to this Agreement,
when taken or read together as a whole, contains or shall contain any untrue
statement of a material fact or omits or will omit to state a material fact
necessary to make any representation or warranty contained herein, in light of
the circumstances under which made, not misleading. All Schedules and updates
thereto have been and are true, correct and complete.

                                      ARTICLE 7
                           PRE-CLOSING COVENANTS OF INGENEX

    From and after the date of this Agreement and continuing through and to the
Closing Date, INGENEX shall use its good faith business efforts to:

    7.1  CONDUCT OF BUSINESS.  Carry on the Business in the ordinary course and
in substantially the same manner and with like standards as heretofore
maintained.

    7.2  MAINTAIN RELATIONSHIPS.  Maintain INGENEX's current relationships with
its collaborative scientific partners, customers and suppliers as they relate to
the Business.

    7.3  COOPERATION. Cooperate fully with PPD and its employees or agents in
order to complete all investigations of INGENEX and the Business prior to the
Closing Date.


                                          16

<PAGE>

    7.4  LIMITATIONS ON DISTRIBUTIONS. Not make any distributions or payments
of the Acquired Assets (or any interests therein) to any of INGENEX's
shareholders or employees, except as required to consummate the transactions
contemplated hereunder.

    7.5  COMPLIANCE WITH LAWS.  Comply in all material respects with all
applicable foreign, federal, state and local laws, ordinances, rules and
regulations as they relate to the Business.

    7.6  ENVIRONMENTAL PROBLEMS.  Inform PPD or SUBSIDIARY of any known escape,
seepage, leakage, spillage, discharge, emission or release of any toxic or
hazardous substance or waste on the Premises or any other condition or event
which occurs in violation of any Environmental Laws.

    7.7  ACCESS TO PREMISES.  Permit PPD, its authorized agents and
representatives, access to the Records and the personnel of INGENEX and to the
Premises during normal business hours and in a manner that will not unreasonably
interfere with the Business operations of INGENEX for the purpose of conducting
due diligence and verifying the existence and condition of the Acquired Assets.

    7.8  LIMITATION ON EXPENDITURES.  Not make any expenditures or enter into
any contract or agreement relating to the Acquired Assets, the Assumed
Liabilities or the Business exceeding $25,000, except in the normal course of
business or as otherwise required to consummate the transactions contemplated
hereunder.

    7.9  USE OF ACQUIRED ASSETS.  Not use the Acquired Assets to be conveyed
hereunder, or any replacements thereof and additions thereto, other than in the
usual and ordinary course of business.
 
    7.10 NO DISPOSITION OF ACQUIRED ASSETS.  Not license, sell, mortgage, lease
or otherwise convey any of the Acquired Assets (or any interest therein) or
enter into any contract to effect the same except in the ordinary course of
business.

    7.11 OTHER ACTION. Not take any action, or fail to take any action, or do
anything which would in any way have a material adverse effect on the Business
or the Acquired Assets or terminate, impair or cancel the License Agreements or
the Lease.

                                      ARTICLE 8
                   CONDITIONS TO OBLIGATIONS OF PPD AND SUBSIDIARY

    The obligations of PPD and SUBSIDIARY under this Agreement are subject to
the satisfaction, or the waiver thereof by PPD and SUBSIDIARY, of the following
express conditions precedent on or before the Closing Date:

    8.1  CORRECTNESS OF WARRANTIES.  All of the representations and warranties
of INGENEX contained in this Agreement or the Transaction Documents were true
and correct when made and shall be true and correct at and as of the Closing
Date (except such representations, warranties and matters which are specifically
limited by reference to an earlier date and were true and correct as of such
earlier date).


                                          17

<PAGE>

    8.2  PERFORMANCE OF OBLIGATIONS.  INGENEX has performed and complied with
all of the obligations, covenants and conditions required to be performed or
complied in all material respects with by it at or prior to the Closing.

    8.3  NO ADVERSE CHANGE.  There shall have been no material adverse change
in the Acquired Assets or the Business.

    8.4  THIRD PARTY CONSENTS.  PPD and SUBSIDIARY shall have been furnished
with evidence satisfactory to it of the consent or approval of those persons
whose consent or approval shall be required to effect the transfer of the
Acquired Assets and the assumption of the Assumed Liabilities and to consummate
the transactions contemplated by this Agreement.

    8.5  GOVERNMENTAL APPROVAL. PPD and SUBSIDIARY shall have been furnished
with all governmental authority or agency approvals, waivers, authorizations and
consents necessary for consummation of or in connection with the transactions
contemplated by this Agreement.

    8.6  SATISFACTION OF LIENS AND ENCUMBRANCES.  All obligations with respect
to which any Lien or Encumbrance (other than the Accepted Liens and
Encumbrances) against any of the Acquired Assets may have existed shall have
been satisfied in full.

    8.7  NO LITIGATION OR PROCEEDINGS.  No litigation, proceedings, lawsuit or
investigations shall have been commenced with respect to any or all of the
Acquired Assets, the Premises and/or the Business, which may be reasonably
expected to result in a material adverse change thereto if decided adversely,
nor shall any party seek to enjoin, prevent or alter any material performance
under this Agreement or to prevent the Closing.

    8.8  DOCUMENTS TO BE DELIVERED BY INGENEX.  In addition to any other
documents or records required to be delivered hereunder, INGENEX shall deliver
or cause to be delivered to PPD or SUBSIDIARY at Closing (or as otherwise
provided for herein):

         8.8.1     A certified copy of the resolutions adopted by the board of
directors of INGENEX approving and authorizing the execution and delivery of
this Agreement and the consummation of the transactions contemplated herein.

         8.8.2     The Bill of Sale and Assignment in the form of EXHIBIT 1.2A.

         8.8.3     An Assignment and Assumption of License Agreements, in the
form of EXHIBIT 1.2B.

         8.8.4     An Assignment and Assumption of Contracts in the form of
EXHIBIT 1.2C.

         8.8.5     An Assignment of Patents and Patent Applications in the form
attached hereto as EXHIBIT 1.2D.

         8.8.6     The Intellectual Property Assignment in the form of EXHIBIT
1.2E.


                                          18

<PAGE>

         8.8.7     The Assignment, Assumption and Amendment of Lease in the
form of EXHIBIT 1.2F, including the consent of the landlord to the assignment of
the Lease.

         8.8.8     The Employment Agreements in the form of EXHIBITS 4.1A and
4.1B.

         8.8.9 Amendments to the Consulting Agreements with each of Igor
Roninson, Ph.D., Richard L. Davidson, Ph.D. and Eli Gilboa, Ph.D. required
pursuant to Section 4.2 hereof.

         8.8.10  Termination of Consulting Agreement with  Andrei Gudkov, Ph.D.
pursuant to Section 4.2 hereof.

         8.8.11  The Consulting Agreements in the form of EXHIBITS 4.2A and
4.2B. 

         8.8.12  New Lease Agreement with Phoenix required pursuant to Section
4.4 hereof.

         8.8.13  Release of the equipment from each of the Master Equipment
Lease and the Sublease and Acknowledgment of Assignment required pursuant to
Section 4.4 hereof.

         8.8.14  Release of the GSE Exclusive License Agreement from the
License Assignment and License Agreement required pursuant to Section 4.6
hereof.

         8.8.15  Termination of each of the Employment Agreements with Mark E.
Furth, Ph.D. and Tatyana Holzmayer, Ph.D. required pursuant to Section 4.7
hereof.

         8.8.16  A release in the form of EXHIBIT 4.8 from INGENEX with respect
to the Proprietary Information and Inventions Agreement with each person set
forth in Section 4.8.

         8.8.17  The Non-Competition Agreement in the form of EXHIBIT 4.13.

         8.8.18  A Closing Certificate dated as of the Closing Date signed by
the Chief Executive Officer of INGENEX to the effect that the conditions set
forth in Sections 8.1 and 8.2 have been satisfied.  The certificates shall have
the effect of affirming the representations and warranties made by INGENEX on
and as of the Closing Date.

         8.8.19  Updated Schedules and Exhibits hereto to the extent such
updates are necessary to make same full, complete and correct as of the Closing
Date.

         8.8.20    A Severance Agreement in the form of EXHIBIT 8.8.20 to be
executed by INGENEX in respect of each person set forth in Section 4.3.

         8.8.21  Such other instruments, documents or certificates required by
this Agreement or as PPD or SUBSIDIARY or its counsel shall reasonably request.

                                      ARTICLE 9
                         CONDITIONS TO OBLIGATIONS OF INGENEX


                                          19

<PAGE>

    The obligations of INGENEX under this Agreement are subject to the
satisfaction, or the waiver thereof by INGENEX, of the following express
conditions precedent on or before the Closing Date:

    9.1  CORRECTNESS OF WARRANTIES.  All of the representations and warranties
of PPD and SUBSIDIARY contained in this Agreement or the Transaction Documents
were true and correct when made and shall be true and correct at and as of the
Closing Date (except such representations, warranties and matters which are
specifically limited by reference to an earlier date and were true and correct
as of such earlier date).

    9.2  PERFORMANCE OF OBLIGATIONS. PPD or SUBSIDIARY has performed and
complied with all of the obligations, covenants and conditions required to be
performed or complied in all material respects with by it at or prior to the
Closing.

    9.3  THIRD PARTY CONSENTS.  INGENEX shall have timely obtained each consent
or approval of those persons whose consent or approval shall be required to
effect the transfer of the Acquired Assets and the assumption of the Assumed
Liabilities and to consummate the transactions contemplated by this Agreement.

    9.4  GOVERNMENTAL APPROVAL. INGENEX shall have timely obtained from each
governmental authority or agency all approvals, waivers, authorizations and
consents,  necessary for consummation of or in connection with the transactions
contemplated by this Agreement.

    9.5  NO LITIGATION OR PROCEEDINGS.  No litigation, proceedings, lawsuit or
investigations shall have been commenced with respect to any or all of the
Acquired Assets, the Premises and/or the Business, which may be reasonably
expected to result in a material adverse change thereto if decided adversely,
nor shall any party seek to enjoin, prevent or alter any material performance
under this Agreement or to prevent Closing.

    9.6  DOCUMENTS TO BE DELIVERED BY PPD or SUBSIDIARY.  In addition to any
other documents or records required to be delivered hereunder, PPD or SUBSIDIARY
shall deliver or cause to be delivered to INGENEX at Closing (or as otherwise
provided for herein):

         9.6.1     The Purchase Price in accordance with Section 2.1 and the
security deposit in accordance with Section 4.11. 

         9.6.2     A certified copy of the resolutions adopted by the board of
directors of PPD and SUBSIDIARY approving and authorizing the execution and
delivery of this Agreement and the consummation of the transactions contemplated
herein.

         9.6.3     An Assignment and Assumption of License Agreements in the
form of EXHIBIT 1.2B.

         9.6.4     An Assignment and Assumption of Contracts in the form of
EXHIBIT 1.2C.

         9.6.5     The Intellectual Property Assignment in the form of EXHIBIT
1.2E.


                                          20

<PAGE>

         9.6.6     The Assignment, Assumption and Amendment of Lease in the
form of EXHIBIT 1.2F, including any necessary guaranty by PPD and release of
TITAN as contemplated by Section 4.5 hereof.

         9.6.7     The Employment Agreements in the form of EXHIBITS 4.1A and
4.1B. 

         9.6.8     The Consulting Agreements in the form of EXHIBITS 4.2A and
4.2B. 

         9.6.9     New Lease Agreement with Phoenix required pursuant to
Section 4.4 hereof.

         9.6.10    A Closing Certificate dated as of the Closing Date signed by
the president or chief executive officer of each of PPD and SUBSIDIARY to the
effect that the conditions set forth in Sections 9.1 and 9.2 have been
satisfied.  The certificates shall have the effect of affirming the
representations and warranties made by PPD and SUBSIDIARY on and as of the
Closing Date.

         9.6.11  Such other instruments, documents or certificates required by
this Agreement or as INGENEX or its counsel shall reasonably request.

                                      ARTICLE 10
                                   INDEMNIFICATION

    10.1 INDEMNIFICATION OBLIGATION OF INGENEX.  From and after the Closing,
INGENEX shall reimburse, indemnify and hold harmless PPD and SUBSIDIARY, their
respective shareholders, officers, directors, employees, agents, successors and
assigns, from and against any and all claims, causes of action, judgments,
awards, demands, damages, losses, settlement payments, deficiencies,
liabilities, costs and expenses, including, without limitation, reasonable
attorneys' fees and court costs (hereinafter collectively referred to as
"Losses") suffered, sustained, incurred or required to be paid by PPD or
SUBSIDIARY that result from, relate to or arise out of:

         10.1.1    Any  breach of, or the failure to fulfill or perform,  any
representation or warranty, or the failure to fulfill or perform in any material
respect any agreement or covenant, of INGENEX contained in this Agreement or
contained in any certificate furnished to PPD or SUBSIDIARY by INGENEX in
connection with this Agreement;

         10.1.2    The failure by INGENEX to comply fully with the provisions
of the "bulk sales laws" of any jurisdiction, or governmental authority or
agency, to the extent applicable to the transactions contemplated by this
Agreement; or 

         10.1.3    The business, operations or assets of INGENEX other than as
relates to the operation of the Business, the Acquired Assets and the GSX System
on and after the Closing Date.

    10.2 LIMITATION ON INDEMNIFICATION OBLIGATION OF INGENEX.  Except as
otherwise provided in Section 10.8 of this Agreement, the indemnification
obligations of INGENEX in respect of any Losses of PPD and SUBSIDIARY shall be
limited to Five Million Dollars


                                          21

<PAGE>

($5,000,000) in the aggregate.  Further, INGENEX shall have no obligation to
indemnify PPD and SUBSIDIARY in respect of any Losses resulting from
circumstances described in Section 10.1 of this Agreement until the aggregate
amount of such Losses exceeds Seventy-Five Thousand Dollars ($75,000), and then
INGENEX shall be liable for the full extent of all such Losses (including those
less than Seventy-Five Thousand Dollars ($75,000)).

    10.3 INDEMNIFICATION OBLIGATION OF PPD AND SUBSIDIARY.  From and after the
Closing, PPD and SUBSIDIARY shall reimburse, indemnify and hold harmless INGENEX
and its shareholders, officers, directors, employees, agents, successors and
assigns, from and against any and all Losses suffered, sustained, incurred or
required to be paid by INGENEX that result from, relate to or arise out of:

         10.3.1    Any breach of, or the failure to fulfill or perform, any
representation or warranty, or the failure to fulfill or perform in any material
respect any agreement or covenant, of PPD or SUBSIDIARY contained in this
Agreement or contained in any certificate or other writing furnished to INGENEX
by or on behalf of PPD or SUBSIDIARY in connection herewith; 

         10.3.2    The failure of PPD or SUBSIDIARY to discharge the Assumed
Liabilities in accordance with their terms and the terms of this Agreement; or 

         10.3.3  The operation of the Business, the Acquired Assets and the GSX
System on and after the Closing Date.
 .
    10.4 SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  The representations and
warranties given or made by INGENEX, PPD or SUBSIDIARY in this Agreement or in
any certificate or other writing furnished pursuant hereto shall survive the
Closing for a period of twelve (12)  months after the date hereof and shall
thereafter terminate and be of no further force or effect, except that (i) all
representations and warranties relating to Taxes of INGENEX shall survive the
Closing for the period of the applicable statute of limitations plus any
extensions or waivers thereof, and (ii) any representation or warranty as to
which a claim shall have been asserted during the survival period shall continue
in effect with respect to such claim until such claim shall have been finally
resolved or settled.  Notwithstanding any investigation or audit conducted
before or after the date hereof or the decision of any party to complete the
Closing, each party shall be entitled to rely upon the representations and
warranties of the other party set forth herein; provided, however, to the extent
that a party discovers that a representation or warranty made by the other party
is inaccurate and intentionally fails to disclose the same, the discovering
party shall lose its right to indemnification with respect to the inaccuracy of
any such representation or warranty.

    10.5 MANNER OF INDEMNIFICATION.  All Losses shall be paid promptly in cash
by the party responsible to provide indemnification hereunder (the "Indemnitor")
upon demand by the party entitled to indemnification hereunder (the
"Indemnitee").  Any claim for indemnification hereunder shall set forth in
reasonable detail the basis for such claim and the amount of Losses in respect
of which indemnification is being sought and a certification by the Indemnitee
that such claim is based upon a reasonable investigation and assessment of such
claim by the Indemnitee.

    10.6 REQUIREMENT FOR NOTICE.  In the event that any claim is asserted or
any action, suit or proceeding is commenced against an Indemnitee which can
reasonably be expected to result in


                                          22

<PAGE>

any liability or indemnity being imposed on an Indemnitor, the Indemnitee shall
exercise due diligence and reasonable judgment in defending or settling same and
shall give notice thereof to the Indemnitor in writing within a reasonable time
following the assertion of the claim or commencement of the action, suit or
proceeding (but the failure or delay to give any such notice shall not relieve
the Indemnitor of any liability on account thereof except to the extent the
Indemnitor was materially prejudiced thereby).  The Indemnitor shall have the
opportunity to participate in (but not control) the defense against such claim,
action, suit or proceeding and to participate in any negotiations with respect
thereto.  The Indemnitee shall have control of any defense or settlement, except
that the Indemnitor shall have the right at any time to assume and prosecute the
defense or claim and to assume control of the defense or settlement in the event
it admits in writing its liability to the Indemnitee hereunder with respect to
such matter and provides adequate security to assure its payment of such
liability to the Indemnitee.

    10.7 OTHER RIGHTS AND REMEDIES NOT AFFECTED.  Subject to the limitations
set forth in this Article 10, the indemnification rights of any party under this
Article 10 are independent of and in addition to such rights and remedies as
such party may have in equity for any misrepresentation, breach of warranty or
failure to fulfill any agreement or covenant hereunder on the part of INGENEX,
PPD or SUBSIDIARY.

    10.8 REPURCHASE RIGHTS.  In the event that PPD and SUBSIDIARY gives written
notice of demand for payment of indemnification obligations required to be paid
by INGENEX to PPD and SUBSIDIARY under Section 10.1 which, when added to
indemnification obligations already paid by INGENEX to PPD or SUBSIDIARY under
Section 10.1, exceed in the aggregate Three Million Dollars ($3,000,000), then
in such case INGENEX shall have right to repurchase (the "Repurchase
Transaction") the Acquired Assets, and any improvements made or developed in
respect of the Acquired Assets since the Closing Date, if and to the extent
still owned by SUBSIDIARY. INGENEX shall exercise its rights to repurchase the
Acquired Assets hereunder by giving written notice to PPD and SUBSIDIARY of its
intent to do so within thirty (30) days after final resolution of and written
notice to INGENEX of demand for payment of indemnification claims required to be
paid to PPD and SUBSIDIARY which, in the aggregate when added with all prior
indemnification claims paid by INGENEX, exceed Three Million Dollars
($3,000,000).  The closing of the Repurchase Transaction shall occur within
sixty (60) days after INGENEX's notice of its intention to exercise its right of
repurchase hereunder.  In the event INGENEX exercises its right of repurchase,
the purchase price for the Acquired Assets shall be Eight Million Seven Hundred
Twenty-Two Thousand Five Hundred Dollars ($8,722,500) adjusted as follows: (i)
less all amounts actually paid by INGENEX for indemnification obligations to PPD
and SUBSIDIARY in respect of any Losses, (ii) less the fair market value,
determined by independent appraisal at the time of sale, of any portion of the
Acquired Assets sold by SUBSIDIARY after the Closing Date, and (iii) plus
Twenty-Seven Thousand Two Hundred Twelve and 40/100 Dollars ($27,212.40) for
SUBSIDIARY's security deposit with the landlord under the Lease.  The purchase
price shall be paid in cash or other immediately available funds to SUBSIDIARY
at the closing of the Repurchase Transaction.  In addition to payment of the
purchase price, INGENEX shall effective as of the closing of the Repurchase
Transaction:  (i) assume, indemnify, defend and hold harmless PPD and SUBSIDIARY
from and against all of the Assumed Liabilities to the extent related to
performance due on or after the closing of the Repurchase Transaction, and (ii)
reimburse, indemnify and hold harmless PPD and SUBSIDIARY, their respective
shareholders, officers, directors, employees, agents, successors and assigns in
respect of any and all Losses of PPD and SUBSIDIARY without application of any
of the dollar limitations set forth in Section 10.2 above and without


                                          23

<PAGE>

application of the time limit set forth in Section 10.4 above.  Effective as of
the closing of the Repurchase Transaction, SUBSIDIARY shall convey the Acquired
Assets still owned by it to INGENEX and shall warrant to INGENEX that, since the
Closing Date, SUBSIDIARY has done nothing to impair title to such Acquired
Assets as SUBSIDIARY received it.  INGENEX shall be responsible for obtaining
any necessary governmental and third party consents to effect the Repurchase
Transaction and for negotiating and obtaining any employment and consulting
agreements it desires in connection with the Repurchase Transaction.  SUBSIDIARY
and PPD agree to provide INGENEX with any all information of which either has
knowledge in the same format, based upon the same investigation as conducted by
INGENEX, in which said information was provided to SUBSIDIARY and PPD by INGENEX
(but not with any representation or warranty of any sort by PPD or SUBSIDIARY)
with respect to the matters covered in Sections 5.3, 5.4, 5.5, 5.9, 5.10, 5.14
and 5.15 of this Agreement.

                                      ARTICLE 11
                               MISCELLANEOUS PROVISIONS

    11.1 NOTICES.  Any notice or other communication required or which may be
given hereunder shall be in writing and shall be deemed duly given when
delivered in person, or three (3) days after when mailed by certified (with the
sender's receipt postmarked by a postal employee) or registered mail (in either
case, with a copy by ordinary first-class mail) or one (1)-day after when mailed
by next-day express mail, or when sent by Federal Express or similar overnight
delivery service company, postage or express charges prepaid, in a securely
wrapped envelope addressed to the intended recipient as follows:

         11.1.1    If to INGENEX:

                          c/o Titan Pharmaceuticals, Inc.
                          Attn:  President
                          400 Oyster Point Boulevard, Suite G
                          South San Francisco, CA 94080-1921
                          Telephone: (415) 244-4990
                          Facsimile: (415) 244-4991
                   
                          With a copy to:

                          Charles I. Weissman, Esq.
                          Shereff, Friedman, Hoffman & Goodman, LLP
                          919 Third Avenue
                          New York, NY 10022-9998
                          Telephone (212) 758-9500
                          Facsimile (212) 758-9526


                                          24

<PAGE>

         11.1.2    If to SUBSIDIARY or PPD:

                          Fred N. Eshelman, Chief Executive Officer
                          Fred B. Davenport, Jr., General Counsel 
                          Pharmaceutical Product Development, Inc.
                          3151 17th Street Extension
                          Wilmington, NC  28412
                          Telephone:  (910) 251-0081
                          Facsimile:   (910) 772-6951
                   
                   With a copy to:
                   
                          G. Stephen Diab, Esq. 
                          Murchison, Taylor, Kendrick & Gibson, L.L.P.
                          16 North Fifth Avenue
                          Wilmington, NC 28401-4593  
                          Telephone:  (910) 763-2426
                          Facsimile:  (910) 763-6561

The designation of the person to be so notified or the address of such person
for the purposes of such notice may be changed from time to time by notice
hereunder.

    11.2 PARTIES IN INTEREST.  This Agreement shall be binding upon and inure
to the benefit of the parties hereto and their respective permitted successors
and assigns, but shall not be assigned by any party without the written consent
of the other party hereto (which consent may be withheld in the sole discretion
of such other party).  This Agreement shall not be for the benefit of or be
enforceable by any person, firm or entity other than PPD, SUBSIDIARY or INGENEX,
their permitted successors and assigns, and there are no third party
beneficiaries hereof.

    11.3 ENTIRE AGREEMENT.  This Agreement along with the schedules and
exhibits attached hereto and to be attached hereto at Closing sets forth all of
the promises, covenants, agreements, conditions and understandings among
SUBSIDIARY, INGENEX and PPD with respect to the subject matter hereof, and
supersedes all prior and contemporaneous agreements and understandings,
inducements or conditions, express or implied, oral or written, with respect
hereto, except as contained herein.

    11.4 AMENDMENT AND WAIVER.  This Agreement shall not be amended, modified,
altered or rescinded, or any rights hereunder waived, except by written
agreement signed by the parties hereto.  Moreover, no waiver by any party of any
right or condition, or of the breach of any term, covenant, representation or
warranty contained in this Agreement, in any one or more instances shall be
deemed or construed as a further or continuing waiver of any such condition or
breach or a waiver of any other condition or of the breach of any other term,
covenant, representation or warranty set forth in this Agreement. 

    11.5 SCHEDULES AND EXHIBITS.  Concurrently with the execution of this
Agreement, the parties have attached to this Agreement certain schedules and
exhibits referred to herein, which


                                          25

<PAGE>

schedules and exhibits are hereby made a part hereof by reference thereto. 
Certain schedules shall be attached hereto after the execution hereof, or
updated as of Closing and shall be true, accurate and complete as of the date of
attachment.

    11.6 CONTROLLING LAW.  The parties hereto acknowledge that, notwithstanding
that this Agreement or any counterpart hereof may be executed and consummated
elsewhere, this Agreement shall be governed by and construed and enforced in
accordance with the laws of the State of North Carolina.

    11.7 CAPTIONS.  The captions of the various sections, subsections and
clauses are solely for the convenience of the parties hereto and shall not
control or affect the meaning or construction of this Agreement.

    11.8 COUNTERPARTS.  This Agreement may be executed in one or more
counterparts, each of which shall constitute an original agreement but all of
which together shall constitute one and the same instrument.

    11.9 SEVERABILITY.  If any term or provision of this Agreement is found by
a court of competent jurisdiction to be invalid or unenforceable, in whole or in
part, then the rest and remainder of this Agreement, and such provisions or term
in other situations, shall remain valid and enforceable to the fullest extent
permitted by law, and to that end this Agreement shall be severable.

    11.10     RELEASE OF INFORMATION.  Neither party shall make any public
announcement regarding this Agreement before Closing without the other party's
prior consent.  PPD and/or TITAN shall have the right to make public
announcements regarding this Agreement at such times as it determines, in good
faith and in its sole discretion, disclosure is required by applicable
securities laws or NASDAQ National Market rules.  Any other public announcements
regarding this Agreement shall be made by PPD and INGENEX at a mutually
acceptable date and time.  Nothing contained herein shall prevent either party
at any time from promptly furnishing any information required by any
governmental authority or (in the case of PPD or TITAN) the NASDAQ National
Market rules.

    11.11     COSTS.  Each party shall bear its own costs of professional and
other consulting fees related to this transaction.


                                          26

<PAGE>

    IN WITNESS WHEREOF, the parties hereto have executed this Agreement,
individually or through their duly authorized officers, and affixed their seals
hereto, all as of the day and year first above written.


[CORPORATE SEAL]                       PHARMACEUTICAL PRODUCT
                                       DEVELOPMENT, INC.


ATTEST:                      BY:       /s/ Frederic N. Eshelman
                                       ------------------------
- -------------------------              NAME: FREDERIC N. ESHELMAN
- ---------------Secretary               TITLE: CHIEF EXECUTIVE OFFICER


[CORPORATE SEAL]                       SUBSIDIARY NO. 3, INC.


ATTEST:                      BY:       /s/ Frederic N. Eshelman
                                       ------------------------
- -------------------------              NAME: FREDERIC N. ESHELMAN
- ---------------Secretary               TITLE: PRESIDENT



[CORPORATE SEAL]                       INGENEX, INC.


ATTEST:                      BY:       /s/ Mark E. Furth
                                       -----------------
- -------------------------              NAME: MARK E. FURTH
- ---------------Secretary               TITLE: PRESIDENT


                                          27

<PAGE>

                                 SUBLICENSE AGREEMENT


    THIS SUBLICENSE AGREEMENT (the "Agreement") is made and entered into as of
this 15th day of July 1997 by and between ANSAN PHARMACEUTICALS, INC.("Ansan")
and TITAN PHARMACEUTICALS, INC.("Titan").

                                       RECITALS

    A.   Titan is the principal stockholder of Ansan.

    B.   Ansan has licensed patent rights pursuant to the terms of a License
Agreement dated as of October 31, 1992 by and between Ansan and Bar-Ilan
Research & Development Company Ltd.

    C.   The parties desire to sublicense to Titan certain Ansan drug compounds
in certain fields in return for transfer to Ansan of all the Ansan securities
owned by Titan and payment by Titan of a royalty on net sales of the drug
compounds, subject to the terms and conditions of this Agreement.


    THE PARTIES AGREE AS FOLLOWS:

    1.   DEFINITIONS.  As used in this Agreement, the following terms shall
have the following meaning:

         "AFFILIATE" shall mean any company or entity, the voting control of
which is at least fifty per cent (50%), directly or indirectly, owned or
controlled by Titan or which, directly or indirectly, owns or controls at least
fifty percent (50%) of Titan or which is under common control with Titan, and
shall also mean any company or entity in fact effectively controlled by or under
common control with Titan.

         "AN 9" shall mean pivaloyloxymethyl butyrate.

         "AN 10" shall mean butylidene dibutyrate.

         "BAR-ILAN" shall mean Bar-Ilan Research & Development Company Ltd., an
Israeli corporation.


<PAGE>

         "BAR-ILAN LICENSE AGREEMENT" shall mean the License Agreement dated as
of October 31, 1992 by and between Ansan and Bar-Ilan.

         "DISCOVERY" shall mean Discovery Laboratories, Inc., a Delaware
corporation

         "HEMOGLOBINOPATHIES PATENT" shall mean issued U.S. Patent
No. 5,569,675 and any related foreign patent applications or patents, including
any continuations, continuations-in-part, divisional, reissues, reexaminations
or extensions thereof.

         "LICENSED PRODUCTS" shall have the meaning set forth in Section 1.4 of
the Bar-Ilan License Agreement.

         "LICENSED PROCESSES" shall have the meaning set forth in Section 1.5
of the Bar-Ilan License Agreement.

         "MERGER AGREEMENT" shall mean that Agreement and Plan of
Reorganization dated as of the date hereof by and between Ansan and Discovery.

         "NET SALES" shall have the meaning set forth in Section 1.7 of the
Bar-Ilan License Agreement.

         "NUDELMAN PATENT" shall mean issued U.S. Patent No. 5,200,553 and any
related foreign patent applications or patents, including any continuations,
continuations-in-part, divisional, reissues, reexaminations or extensions
thereof.

         "PATENT RIGHTS" shall have the meaning set forth in Section 1.3 of the
Bar-Ilan License Agreement.

         "SECURITIES" shall mean those Ansan securities set forth in Exhibit A
hereto.

         "TITAN FIELD" shall mean: (a) with respect to all compounds except AN
10, all indications except (i) those covered by the Hemoglobinopathies Patent
and (ii) topical applications (other than oncologic disorders) and (b) with
respect to AN 10, non-topical applications for oncologic disorders.

    2.   SUBLICENSE.


                                          2
<PAGE>

         2.1  GRANT.  Subject to the terms and conditions of this Agreement, at
the Closing (as defined in Section 4) Ansan shall grant to Titan a worldwide
sublicense to practice under the Patent Rights, and to make, have made, use,
lease and/or sell the Licensed Products in the Titan Field and to practice the
Licensed Processes in the Titan Field, said sublicense to include the right to
subsublicense in the Titan Field and to be exclusive to Titan in the Titan
Field.  The parties agree that the obligations to pay royalties to Bar-Ilan
pursuant to Article 4 of the Bar-Ilan License Agreement and Titan's obligation
to pay Ansan royalties pursuant to Section 2.4 hereof shall continue until the
expiration of the last applicable patent on such Licensed Product or Licensed
Process in such country, after which time Ansan's license under the Bar-Ilan
License Agreement and Titan's sublicense under this Agreement shall become fully
paid-up, perpetual licenses.

         2.2  INCORPORATION OF BAR-ILAN LICENSE AGREEMENT TERMS.  The parties
hereby incorporate the following terms of the Bar-Ilan License Agreement,
modified to provide that Titan shall have the rights and obligations of LICENSEE
and ANSAN shall have the rights and obligations of BAR-ILAN and references to
"this License Agreement" shall be interpreted to mean "this Agreement": Sections
1.3, 1.4, 1.5, 1.7, 2.2, 2.3, 3.1(except for the last clause "consistent with
the business plan described in Paragraph 3.2.3, below"), 3.3, 3.5, 4.1, 4.2,
4.3, 4.4, 5.1, 5.2, 5.3, 7.1, 7.2, 7.4, 7.5, 7.6, 7.7,7.8, 9.1,9.2, 9.3, 9.4,
9.5, 10.1 and 10.2.

         2.3  PATENT PROSECUTION OF NUDELMAN PATENT.  Titan at its own expense
and utilizing patent counsel of its choice shall have the sole right and
responsibility for the prosecution and maintenance of the Nudelman Patent,
provided that Titan shall not take any action with respect to the Nudelman
Patent that could result in any diminution of rights relating to the composition
of matter claims relating to AN10.  Ansan shall have the sole right and
responsibility for the prosecution and maintenance of the Hemoglobinopathies
Patent.

         2.4  ROYALTIES TO ANSAN.  In addition to the royalties payable
pursuant to Section  2.2, Titan shall pay to Ansan to the end of the term of the
Patent Rights or until this Agreement is terminated in accordance with its
terms, in each calendar year an amount equal to 2% of Net Sales by Titan, any
Affiliate or any sublicensee of Titan.

    3.   SECURITIES.  Subject to the terms and conditions of this Agreement,
Titan agrees to transfer to Ansan at the Closing (as defined in Section 4) all
right, title and interest in the Securities, free and clear of any and all
liens, encumbrances and security interests.  Ansan and Titan acknowledge that a
portion of the Securities are held by Continental Stock Transfer & Trust Company
as Escrow


                                          3
<PAGE>

Agent pursuant to the terms of an Escrow Agreement dated as of May __, 1995. 
Ansan and Titan agree to take all steps reasonably necessary to obtain release
of such Securities and delivery to Ansan in accordance with the terms of this
Agreement.

    4.   CLOSING.  The closing of the transactions contemplated by this
Agreement (the "Closing") shall take place simultaneously with the closing of
the Merger Agreement at the offices of Heller Ehrman White & McAuliffe, 525
University Avenue, Palo Alto, California or at such other time, date and
location as the parties agree.

    5.   CONDITIONS TO CLOSING.

         5.1  CONDITIONS TO OBLIGATIONS OF TITAN.  The obligations of Titan to
consummate the transactions contemplated hereby shall be subject to satisfaction
at the Closing of each of the following conditions, any of which may be waived
by Titan:

         (a)  REPRESENTATIONS AND WARRANTIES.  The representations and
warranties of Ansan contained in this Agreement shall have been true and correct
in all material respects as of the date of this Agreement and as of the date of
the Closing.  Titan shall have received a certificate with respect to the
foregoing signed on behalf of Ansan by the Chief Executive Officer of Ansan.

         (b)  CLOSING OF THE MERGER AGREEMENT.  The transactions contemplated
by the Merger Agreement shall have closed.

         (c)  SIDE AGREEMENT.  Bar-Ilan shall have executed and delivered the
Side Agreement in substantially the form attached as Exhibit 5 hereto.

         5.2  CONDITIONS TO OBLIGATIONS OF ANSAN.  The obligations of Ansan to
consummate the transactions contemplated hereby shall be subject to satisfaction
at the Closing of each of the following conditions, any of which may be waived
by Ansan:

         (a)  REPRESENTATIONS AND WARRANTIES.  The representations and
warranties of Titan contained in this Agreement shall have been true and correct
in all material respects as of the date of this Agreement and as of the date of
the Closing.  Ansan shall have received a certificate with respect to the
foregoing signed on behalf of Titan by the Chief Executive officer of Titan.


                                          4
<PAGE>

         (b)  CLOSING OF THE MERGER AGREEMENT.  The transactions contemplated
by the Merger Agreement shall have closed. 

    6.   REPRESENTATIONS AND WARRANTIES OF TITAN.

         6.1  AUTHORITY.  Titan has all requisite corporate power and authority
to enter into this Agreement and to consummate the transactions contemplated
hereby.  The execution and delivery of this Agreement and the consummation of
the transactions contemplated hereby have been duly authorized by all necessary
corporate action on the part of Titan.

         6.2  OWNERSHIP OF SECURITIES.  Titan is the sole record and 
beneficial owner of the Securities and owns all right, title and interest in
such Securities free and clear of all liens, encumbrances and security interests
and at the Closing shall transfer title to such Securities free and clear of all
liens, encumbrances and security interests.  Titan does not own beneficially or
of record or have the right to purchase any securities of Ansan other than the
Securities.

    7.   REPRESENTATIONS AND WARRANTIES OF ANSAN.

         7.1  AUTHORITY.  Ansan has all requisite corporate power and authority
to enter into this Agreement and to consummate the transactions contemplated
hereby.  The execution and delivery of this Agreement and the consummation of
the transactions contemplated hereby have been duly authorized by all necessary
corporate action on the part of Ansan, subject to approval of the stockholders
of Ansan.

         7.2  BAR-ILAN LICENSE AGREEMENT.  The Bar-Ilan License Agreement is in
full force and effect, and to the knowledge of Ansan, neither Ansan nor Bar-Ilan
is in material breach of any term of the Bar-Ilan License Agreement.  The
execution and delivery of this Agreement and the consummation of the
transactions contemplated hereby will not constitute a breach of the Bar-Ilan
License Agreement.

         7.3  PATENTS.  Except as disclosed in any filings by Ansan with the
Securities and Exchange Commission pursuant to the Securities Act of 1933 or the
Securities Exchange Act of 1934 prior to the date hereof, Ansan has no knowledge
of any pending or threatened litigation claiming that any claim of the Nudelman
Patent infringes the rights of any other person, and to Ansan's knowledge there
has been no infringement of the Nudelman Patent by any other person.  During the


                                          5
<PAGE>

terms of the Bar-Ilan License Agreement, Ansan has satisfied all of its
obligations to maintain the Nudelman Patent.

    8.   TRANSFER OF KNOW-HOW.  Within 30 days after the Closing, Ansan shall
transfer to Titan, free of charge, (a) copies of all pertinent documents
relating to the sublicense herein granted, including all reports, data,
contracts and regulatory submissions and (b) all remaining Licensed Product
which has been formulated for non-topical use.  Ansan and Titan shall promptly
after the Closing take all steps necessary to transfer the IND into Titan's name
and shall notify the FDA of such intention within 30 days after the Closing.  If
necessary, the parties will cooperate in good faith to establish an agreement
for continuing support of the AN 9 product development program.  The parties
will negotiate the specifics of such an agreement and the reimbursement to be
made to Ansan for expenses incurred in connection therewith on or before the
Closing.

    9.   MISCELLANEOUS.

         9.1  NOTICES.  Any notice or other communication required or permitted
hereunder shall be in writing and shall be delivered personally or sent by
facsimile transmission, overnight courier, or certified, registered or express
mail, postage prepaid.  Any such notice shall be deemed delivered when so
delivered personally or when sent by facsimile transmission (provided that an
appropriate indication of successful transmission is given by the sending
facsimile transmitter and a confirmation copy is sent by overnight courier), or
if sent by overnight courier, one day after deposit with an overnight courier,
or, if mailed, three days after the date of deposit in the United States mails
as follows: 

    IF TO ANSAN:             Ansan Pharmaceuticals, Inc.
                             400 Oyster Point Boulevard, Suite 435
                             South San Francisco, California 94080
                             Attention: President
                             Telecopy No. (415) 635-0201

    IF TO TITAN:             Titan Pharmaceuticals, Inc.
                             400 Oyster Point Boulevard, Suite 505
                             South San Francisco, California 94080
                             Attention: President
                             Telecopy No. (415) 244-4956

Either party may, by notice given in accordance with this Section to the other
party, designate another address or person for receipt of notices hereunder.


                                          6
<PAGE>

         9.2  BINDING EFFECT; AMENDMENT; ASSIGNMENT.  This Agreement shall be
binding upon and inure to the benefit of the parties hereto and their respective
successors and permitted assigns.  Nothing in this Agreement is intended to
confer upon any person other than the parties hereto and their respective
successors and permitted assigns any rights or remedies whatsoever.  This
Agreement may be amended only by an instrument in writing signed on behalf of
each of the parties.  Neither party may sell, transfer or assign any of its
rights or obligations under this Agreement without the written consent of the
other party, which will not be unreasonably withheld.

         9.3  GOVERNING LAW.  This Agreement shall be governed by and construed
in accordance with the laws of the State of California applicable to agreements
made between California residents and to be performed entirely within such
State.

         9.4  EXPENSES.  All costs and expenses incurred in connection with the
transactions contemplated by this Agreement shall be paid by the party incurring
such expenses.

         9.5  FURTHER ASSURANCES.  Each party will execute and deliver all such
further documents and instruments and take all such further actions as may be
necessary to consummate the transactions contemplated hereby.

         9.6  DISPUTES.  Any and all disputes between the parties arising from
or relating to this Agreement shall be referred to the Chief Executive Officers
of Ansan and Titan, respectively, and they shall endeavor to resolve such
dispute in good faith for a period of 45 days.  If any such dispute has not been
resolved within such 45-day period, either party may file an action in a court
of competent jurisdiction.

         9.7  ENTIRE AGREEMENT.  This Agreement constitutes the entire
agreement between the parties with respect to the subject matter hereof and
supersedes all other prior and contemporaneous agreements, understandings,
discussions and correspondence between the parties with respect to the subject
matter.


                                          7
<PAGE>

    IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
first above written.

ANSAN PHARMACEUTICALS, INC.  TITAN PHARMACEUTICALS, INC.



By:  /s/Vaughn H.J. Shalson            By:  /s/Louis R. Bucalo       
- ------------------------------         ------------------------------
    Vaughn H.J. Shalson                     Louis R. Bucalo, M.D.,
    President and Chief Executive           President and Chief Executive
    Officer                                 Officer


                                          8

<PAGE>

                                                                     EXHIBIT 11
                             TITAN PHARMACEUTICALS, INC.
                            (A DEVELOPMENT STAGE COMPANY)
               STATEMENT OF COMPUTATION OF NET INCOME (LOSS) PER SHARE

<TABLE>
<CAPTION>

                                                           THREE MONTHS ENDED JUNE 30,   SIX MONTHS ENDED JUNE 30,
                                                           ---------------------------   -------------------------
                                                              1996           1997           1996          1997
                                                          -----------    -----------   ------------   ------------
                                                                 (unaudited)                   (unaudited)

<S>                                                       <C>            <C>           <C>            <C>
Net income (loss)                                         $(2,685,447)   $ 4,217,077   $ (6,100,363)  $(8,941,489)

Deemed dividend upon conversion of preferred stock                  -              -     (5,431,871)            -
                                                          -----------    -----------   ------------   ------------
Net loss applicable to common stock                        (2,685,447)     4,217,077    (11,532,234)   (8,941,489)
                                                          -----------    -----------   ------------   ------------
                                                          -----------    -----------   ------------   ------------

Weighted average shares of
  common stock outstanding                                 10,757,940     13,046,102      9,791,050    12,971,902

Common stock equivalents                                            -        111,280              -             -

                                                          -----------    -----------   ------------   ------------
Shares used in computing net loss per share                10,757,940     13,157,382      9,791,050    12,971,902
                                                          -----------    -----------   ------------   ------------
                                                          -----------    -----------   ------------   ------------
Net income (loss) per share                               $     (0.25)   $      0.32   $      (1.18)  $     (0.69)
                                                          -----------    -----------   ------------   ------------
                                                          -----------    -----------   ------------   ------------
</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AND STATEMENT OF OPERATION AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                      11,413,881
<SECURITIES>                                   500,000
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                            13,319,270
<PP&E>                                         128,681
<DEPRECIATION>                                (40,825)
<TOTAL-ASSETS>                              13,788,144
<CURRENT-LIABILITIES>                        4,488,588
<BONDS>                                              0
                                0
                                          0
<COMMON>                                    49,622,782
<OTHER-SE>                                (47,075,396)
<TOTAL-LIABILITY-AND-EQUITY>                13,788,144
<SALES>                                              0
<TOTAL-REVENUES>                               147,745
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                            17,281,866
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             138,741
<INCOME-PRETAX>                            (8,941,489)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (8,941,489)
<EPS-PRIMARY>                                   (0.67)
<EPS-DILUTED>                                   (0.67)
        

</TABLE>


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