JENNER TECHNOLOGIES
S-1, 1997-02-19
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   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 19, 1997

                                                REGISTRATION NO. 333-
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   ----------

                                    FORM S-1
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                   ----------

                            JENNER TECHNOLOGIES, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

                                   ----------


CALIFORNIA (PRIOR TO REINCORPORATION)
  DELAWARE (AFTER REINCORPORATION)
   (STATE OR OTHER JURISDICTION
 OF INCORPORATION OR ORGANIZATION)

                                      2834
                          (PRIMARY STANDARD INDUSTRIAL
                           CLASSIFICATION CODE NUMBER)
                                                               68-0292466
                                                            (I.R.S. EMPLOYER
                                                          IDENTIFICATION NUMBER)

                                   ----------

                       2010 CROW CANYON PLACE, SUITE 100
                          SAN RAMON, CALIFORNIA 94583
                                 (510) 824-3150
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINICIPAL EXECUTIVE OFFICES)

                                   ----------

                 ANTHONY E. MAIDA III, CHIEF EXECUTIVE OFFICER
                           JENNER TECHNOLOGIES, INC.
                       2010 CROW CANYON PLACE, SUITE 100
                          SAN RAMON, CALIFORNIA 94583
                                 (510) 824-3150
       (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING
                        AREA CODE, OF AGENT FOR SERVICE)

                                   ----------

                                   COPIES TO:
  BLAIR W. STEWART, JR., ESQ.                       LAWRENCE B. FISHER, ESQ. 
     TIMOTHY STEVENS, ESQ.                   ORRICK, HERRINGTON & SUTCLIFFE LLP
WILSON SONSINI GOODRICH & ROSATI                       666 Fifth Avenue       
    Professional Corporation                     New York, New York 10103-0001  
       650 Page Mill Road                               (212) 506-5000          
  Palo Alto, California 94304                     
         (415) 493-9300                                                      
                                        
                                   ----------
                     
    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:  As soon as
practicable after the effective date of this Registration Statement.

    If any of the securities  being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, check the following box. [x]

    If this Form is filed to  register  additional  securities  for an  offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. [ ]

    If this Form is a  post-effective  amendment  filed  pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. [ ]

    If delivery of the prospectus is expected to be made pursuant to Rule
434, please check the following box. [ ]

<TABLE>
<CAPTION>

                                             CALCULATION OF REGISTRATION FEE
=============================================================================================================================

  TITLE OF EACH CLASS             AMOUNT              PROPOSED MAXIMUM         PROPOSED MAXIMUM            AMOUNT OF
  OF SECURITIES TO BE             TO BE               OFFERING PRICE              AGGREGATE              REGISTRATION
      REGISTERED               REGISTERED(1)            PER SHARE(2)          OFFERING PRICE(2)               FEE
- -----------------------------------------------------------------------------------------------------------------------------
<S>                           <C>                      <C>                    <C>                         <C>
Common Stock, par
value .001 per
share(3)                        2,875,000                 $ 8.00                 $23,000,000              $  6,969.70
- -----------------------------------------------------------------------------------------------------------------------------
Redeemable Common
Stock Purchase
Warrants(4)                     2,875,000                 $  .10                 $   287,500              $     87.12
- -----------------------------------------------------------------------------------------------------------------------------
Common Stock, par
value .001 per share,
issuable on exercise
of Redeemable Common
Stock Purchase
Warrants(5)                     2,875,000                 $11.20                 $32,200,000              $  9,757.58
- -----------------------------------------------------------------------------------------------------------------------------
Representative's
Warrants(6)                       250,000                 $.0001                 $        25                  --
- -----------------------------------------------------------------------------------------------------------------------------
Redeemable Common
Stock Purchase
Warrants issuable upon
exercise of
Representative's
Warrants                           250,000                 $  .14                 $    35,000              $     10.61
- -----------------------------------------------------------------------------------------------------------------------------
Common Stock, par
value .001 per share,
issuable upon exercise
of Redeemable Common
Stock Purchase
Warrants issuable upon
exercise of
Representative's
Warrants                           250,000                 $11.20                 $ 2,800,000              $    848.48
- -----------------------------------------------------------------------------------------------------------------------------
Common Stock, par
value .001 per share,
issuable upon exercise
of Representative's
Warrants(7)                        250,000                 $11.20                 $ 2,800,000              $    848.48
- -----------------------------------------------------------------------------------------------------------------------------
   TOTAL                            N/A                     N/A                   $61,122,525              $ 18,521.97
=============================================================================================================================
</TABLE>
                                            (Footnotes appear on following page)

    THE  REGISTRANT  HEREBY AMENDS THIS  REGISTRATION  STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER  AMENDMENT  WHICH  SPECIFICALLY  STATES  THAT  THIS  REGISTRATION
STATEMENT SHALL  THEREAFTER  BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE  SECURITIES  ACT OF 1933 OR UNTIL THE  REGISTRATION  STATEMENT  SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION,  ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.

================================================================================





(continued from previous page)
(1) Pursuant  to Rule  416,  there are also  being  registered  such  additional
    securities as may become issuable pursuant to the antidilution provisions of
    the Warrants, the Representative's  Warrants and the Warrants underlying the
    Representative's Warrants.
(2) Estimated solely for the purpose of computing the amount of the registration
    fee pursuant to Rule 457.
(3) 2,500,000 shares of Common Stock and 2,500,000 Warrants are being registered
    under this  Registration  Statement.  For  purposes  of  calculation  of the
    registration  fee,  each  share of Common  Stock has been  assumed to have a
    proposed  maximum offering price of $8.00, and each Warrant has been assumed
    to have a proposed  maximum  offering price of $0.10.  Also includes 375,000
    shares of Common Stock which the Underwriters have the option to purchase to
    cover over-allotments, if any.
(4) Includes 375,000 Warrants which the Underwriters have the option to purchase
    to cover over-allotments, if any.
(5) Includes  375,000  shares of Common Stock issuable upon exercise of Warrants
    which the Underwriters have the option to purchase to cover over-allotments,
    if any.
(6) In connection with the Registrant's  sale of the Securities  offered hereby,
    the Registrant is granting to the Representative of the several Underwriters
    (the  "Representative")   warrants  (the  "Representative's   Warrants")  to
    purchase  250,000  shares of  Common  Stock  and/or  250,000  Warrants.  The
    purchase price per Representative's Warrant is $.0001.
(7) The maximum exercise price of the  Representative's  Warrants will be $11.20
    per share of Common Stock and $.14 per Warrant based on the proposed maximum
    offering price of $8.00 per share of Common Stock and $0.10 per Warrant.








Information   contained  herein  is  subject  to  completion  or  amendment.   A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there be any sale of these  securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any such State.










                 SUBJECT TO COMPLETION, DATED FEBRUARY 19, 1997


PROSPECTUS
- ----------

                                  [Logo]

                         JENNER TECHNOLOGIES, INC.

                   2,500,000 SHARES OF COMMON STOCK AND
            2,500,000 REDEEMABLE COMMON STOCK PURCHASE WARRANTS

    Jenner  Technologies,  Inc.  ("Jenner" or the "Company")  hereby offers (the
"Offering")  2,500,000  shares (the "Shares") of common stock,  $0.001 par value
(the "Common  Stock") and 2,500,000  redeemable  common stock purchase  warrants
(the "Warrants"). The Shares and Warrants are sometimes hereinafter collectively
referred to as the  "Securities."  The Shares and Warrants may only be purchased
together on the basis of one Share and one  Warrant,  but will trade  separately
immediately upon issuance.  Each Warrant entitles the registered  holder thereof
to purchase  one share of Common  Stock at an exercise  price of $____ per share
[140% of the initial public  offering price per share of Common Stock],  subject
to adjustment, at any time during the period commencing on _______________, 1998
[twelve months from the date of the Prospectus] until  __________________,  2002
[5 years after the date of this  Prospectus].  Commencing  ____________________,
1998 [18 months from the date of the  Prospectus],  the  Warrants are subject to
redemption  by the Company,  in whole but not in part, at $.10 per Warrant on 30
days' prior written notice  provided that the average closing sales price of the
Common  Stock as reported on the  American  Stock  Exchange  ("AMEX")  equals or
exceeds  $_______ per share [160% of the initial public offering price per share
of Common  Stock]  for any 20  trading  days  within a period of 30  consecutive
trading days ending on the fifth  trading day prior to the date of the notice of
redemption. See "Description of Securities -- Warrants."

    Prior to the Offering,  there has been no public market for the Common Stock
or the Warrants,  and there can be no assurance  that such a market will develop
after completion of the Offering, or if developed, that it will be sustained. It
is currently anticipated that the initial public offering prices will be between
$7.00 and $8.00 per Share and $.10 per Warrant.  For  information  regarding the
factors  considered in  determining  the initial  public  offering  price of the
Shares  and  Warrants  and the terms of the  Warrants,  see "Risk  Factors"  and
"Underwriting."  It is anticipated that the Shares and Warrants will be included
for  quotation on the American  Stock  Exchange  under the symbols JNR and JNRW,
respectively.

                                   ----------

THE  SECURITIES  OFFERED  HEREBY  INVOLVE A HIGH  DEGREE  OF RISK AND  IMMEDIATE
SUBSTANTIAL DILUTION. SEE "RISK FACTORS" COMMENCING ON PAGE 7 AND "DILUTION."

                                   ----------

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
     AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE
      SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
          PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
              REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.



================================================================================
                                   PRICE TO     UNDERWRITING     PROCEEDS TO
                                    PUBLIC       DISCOUNT(1)      COMPANY(2)
- --------------------------------------------------------------------------------
Per Share                         $               $              $
- --------------------------------------------------------------------------------
Per Warrant                       $               $              $
- --------------------------------------------------------------------------------
Total(3)                          $               $              $
================================================================================


(1)  Does  not  include   additional   compensation   to   National   Securities
     Corporation,   the  representative  of  the  several   Underwriters,   (the
     "Representative")  in the form of a non-accountable  expense allowance.  In
     addition, see "Underwriting" for information concerning indemnification and
     contribution  arrangements  with the  Underwriters  and other  compensation
     payable to the Representative.

(2)  Before  deducting  estimated  expenses of $600,000  payable by the Company,
     excluding   the   non-accountable   expense   allowance   payable   to  the
     Representative.

(3)  The Company has granted to the Representative an option, exercisable within
     45 days after the date of this  Prospectus,  to purchase up to an aggregate
     of 375,000  additional  shares of Common  Stock and/or  375,000  additional
     Warrants upon the same terms and  conditions as set forth above,  solely to
     cover  over-allotments,  if any  (the  "Over-Allotment  Option").  If  such
     Over-Allotment  Option is  exercised  in full,  the total  Price to Public,
     Underwriting  Discount and Proceeds to the Company will be $______, $______
     and $_______, respectively. See "Underwriting."


    The Securities are being offered by the Underwriters, subject to prior sale,
when,  as and if delivered to and accepted by the  Underwriters,  and subject to
approval of certain  legal matters by their counsel and subject to certain other
conditions.  The  Underwriters  reserve the right to withdraw,  cancel or modify
this  Offering and to reject any order in whole or in part.  It is expected that
delivery of the Securities  offered hereby will be made against payment therefor
at the offices of National  Securities  Corporation,  Seattle,  Washington on or
about _______________, 1997.

                         NATIONAL SECURITIES CORPORATION

               THE DATE OF THIS PROSPECTUS IS_____________, 1997.









                         [INSERT 4/COLOR GRAPHICS HERE]

                 [Description of Photo and Copy of Text Follows]



                              JENNER'S APPROACH TO
                 TREATMENT OF PATIENT WITH MINIMAL TUMOR BURDEN

    [Photo of Patient with Cancer in stages with and without Immunotherapy]

Current treatments for cancers that have spread are not very effective.  Despite
significant  improvements  in early  diagnosis and in surgical  treaments,  many
surgically treated patients experience recurrence of cancer.  Jenner's principal
product  candidates are designed to delay or prevent the recurrence of cancer by
stimulating the body's own immune system to attack microscopic disease remaining
after a patient has undergone tradional therapy.









    The Company's products are in a development stage and have not been approved
by the  United  States  Food  and Drug  Administration  ("FDA")  or any  foreign
regulatory authority for marketing in any country. Such approval is not expected
to be forthcoming for several years, and may not be received at all.

    IN CONNECTION WITH THIS OFFERING,  THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS  WHICH  STABILIZE  OR MAINTAIN THE MARKET PRICE OF THE COMMON STOCK
AND THE  WARRANTS  OFFERED  HEREBY AT LEVELS  ABOVE THAT WHICH  MIGHT  OTHERWISE
PREVAIL IN THE OPEN MARKET.  SUCH  TRANSACTIONS  MAY BE EFFECTED ON THE AMERICAN
STOCK EXCHANGE OR OTHERWISE. SUCH STABILIZING, IF COMMENCED, MAY BE DISCONTINUED
AT ANY TIME.

    The Company intends to furnish to its stockholders annual reports containing
financial statements audited by its independent certified public accountants and
quarterly reports  containing  unaudited  interim  financial  statements for the
first three quarters of each fiscal year.







- --------------------------------------------------------------------------------

                               PROSPECTUS SUMMARY

    This Prospectus contains  forward-looking  statements.  Such forward-looking
statements include, but are not limited to, the Company's expectations regarding
its future  financial  condition and  operating  results,  product  development,
business and growth strategy, market conditions and competitive environment. The
Company's actual results could differ materially from those anticipated in these
forward-looking  statements as a result of certain factors,  including those set
forth under "Risk  Factors" and  elsewhere  in this  Prospectus.  The  following
summary is qualified in its entirety by the more  detailed  information  and the
Financial  Statements and Notes thereto appearing  elsewhere in this Prospectus.
Unless otherwise  indicated,  all information in this Prospectus (i) assumes the
Underwriter's   over-allotment   option  is  not  exercised,   (ii)  reflects  a
1-for-1.7328  reverse stock split of the  Company's  Common Stock to be effected
prior to the  closing  of the  Offering,  (iii)  assumes  the  Warrants  and the
warrants to purchase  250,000  shares of Common  Stock and/or  250,000  Warrants
issued  to  the   Representative   in   connection   with  this   Offering  (the
"Representative's Warrants") are not exercised, (iv) assumes the reincorporation
of the Company in Delaware prior to the closing of the Offering, and (v) assumes
the  conversion of all  outstanding  shares of the Company's  Series A Preferred
Stock and Series B Preferred Stock into 1,510,015 shares of the Company's Common
Stock upon the closing of the Offering.

                                THE COMPANY

    Jenner Technologies,  Inc. ("Jenner" or the "Company"),  a development stage
company, is engaged in the development of immunotherapies to treat patients with
cancer and certain side effects  related to  chemotherapy.  The Company has four
product candidates under development, two of which are in clinical trials. Three
of the  Company's  product  candidates  are  designed  to delay or  prevent  the
recurrence  of cancer by  stimulating  the body's  own  immune  system to attack
microscopic disease remaining after a patient has undergone traditional therapy.
The  Company's  product  candidates  consist of macrophage  activators  (ACT and
JT3002)  and  therapeutic  vaccines  (OncoVax-P  and  OncoVax-CL).  The  Company
acquired the technology related to ACT and JT3002 through an exclusive worldwide
license with  Novartis AG (the company  resulting  from the merger of Ciba-Geigy
Limited and Sandoz,  Ltd.) ("Novartis").  In addition,  the Company acquired the
rights to produce  the  antigen  related to  OncoVax-P  through a  non-exclusive
license with Research Corporation Technologies,  Inc. and the antigen related to
OncoVax-CL through an exclusive worldwide license with Eli Lilly & Company.

    ACT is in a nationwide  Phase III  clinical  trial as a therapy for patients
with  osteogenic  sarcoma  (bone  cancer).  The  study  calls for a total of 645
patients  to be  treated  under the  protocol  and,  as of  December  31,  1996,
approximately  540 patients had entered the study. ACT utilizes a small molecule
that has the capacity to activate  macrophages,  which are scavenger  cells that
are part of the immune system.  Once activated,  macrophages acquire the ability
to seek out and  destroy  tumor  cells.  ACT  utilizes a  proprietary  liposomal
formulation  to  deliver  its  active  ingredients  (liposomes  are  spheres  of
subcellular size composed primarily of fat molecules).  JT3002 is in preclinical
evaluation as a therapy for mucositis (damage to the gastrointestinal  mucosa or
lining of the gut), a side effect  commonly  associated with  chemotherapy.  The
Company intends to file an Investigational New Drug application ("IND") with the
United States Food and Drug Administration ("FDA") in late 1997 or early 1998 to
commence  Phase I  clinical  trials of  JT3002,  subject  to the  results of the
preclinical evaluation.

    OncoVax-P is in limited Phase I/II clinical trials in patients with prostate
cancer.  The Company intends to commence a limited Phase I/II clinical trial for
OncoVax-CL in patients with colorectal  cancer in the first quarter of 1997. The
Company's Phase I/II clinical trials are conducted in a small number of patients
(5-6) to gain  preliminary  information  regarding  safety  of the  vaccine  and
ability to generate an immune response.  OncoVax-P and OncoVax-CL each include a
genetically  engineered  version of a tumor associated  antigen which represents
the "identity  tag" of the cancer cell combined with an adjuvant  which enhances
the body's immune  response.  The antigen and adjuvant are packaged in liposomes
which are taken up by antigen

- --------------------------------------------------------------------------------

                                       3





- --------------------------------------------------------------------------------

presenting  cells.  The Company believes this approach will induce a more robust
relevant  immune  response  than if the liposomal  delivery  system is not used.
Based on  preclinical  data, the Company  believes that  OncoVax-CL may have the
potential for application in cancer  indications  other than colorectal  cancer,
such as lung, pancreatic and ovarian cancer.

    In an effort to leverage the Company's resources and better manage the risks
and costs inherent in scientific  research and new product  development,  Jenner
has  followed a business  strategy  of (i)  in-licensing  promising  proprietary
technologies for which substantial preclinical and/or clinical studies have been
undertaken,  (ii) focusing on human clinical trials to gain relevant information
rather  than   developing   animal   models,   and  (iii)   engaging   qualified
subcontractors  to perform  research  and  development  functions.  Through this
business  strategy,  the Company has expended only approximately $4.0 million in
cash through  December 31, 1996 to develop its current  product  candidates  and
believes it has extended its research efforts to a larger number of applications
than would otherwise be the case given its limited resources.

    The Company believes that its business strategy and management  capabilities
may enable it to shorten the time frame for commercializing its products. As the
Company's product candidates advance through the regulatory process, the Company
generally intends to establish strategic alliances with pharmaceutical companies
and other corporate partners with large distribution  systems to market and sell
the Company's products worldwide.  In some cases,  however,  where the customers
for a product are easily  identified and  concentrated,  the Company  intends to
market and distribute the product through a direct sales force.

    Jenner was  incorporated  as a California  corporation  in December 1992 and
expects to reincorporate in Delaware prior to consummation of this Offering. The
Company's  principal  offices are located at 2010 Crow Canyon Place,  Suite 100,
San Ramon, California 94583, and its telephone number is (510) 824-3150.






- --------------------------------------------------------------------------------


                                       4




- --------------------------------------------------------------------------------

                                  THE OFFERING

Securities Offered....... 2,500,000   Shares  of   Common  Stock  and  2,500,000
                            Warrants.  The  Shares  and  the  Warrants  will  be
                            separately  transferable  immediately  following the
                            completion of this Offering.

Exercise Price of
  Warrants............... Each Warrant  entitles the  registered  holder thereof
                            to purchase, at any time over a four (4) year period
                            commencing  one  (1)  year  after  the  date of this
                            Prospectus,  one share of Common Stock at a price of
                            $ per share  [140% of the  initial  public  offering
                            price per  Share].  The  Warrant  exercise  price is
                            subject to adjustment  under certain  circumstances.
                            See "Description of Securities."

Redemption of Warrants... Commencing  eighteen   (18) months  after  the date of
                            this   Prospectus,   the  Warrants  are  subject  to
                            redemption  by the  Company at $0.10 per  Warrant on
                            thirty  (30)  days'  prior  written  notice  to  the
                            warrant  holders if the average  closing sales price
                            of the  Common  Stock  equals or exceeds $ per share
                            [160% of the initial public offering price per Share
                            of Common  Stock] for any twenty (20)  trading  days
                            within a period of thirty (30)  consecutive  trading
                            days  ending on the fifth  trading  day prior to the
                            date of the notice of redemption.  See  "Description
                            of Securities."

Common Stock Outstanding
 Prior to the Offering(1). 4,621,886 Shares

Common Stock Outstanding
  After the Offering(1)... 7,121,886 Shares

Use of Proceeds........... For  research  and  development,   clinical   trials,
                            purchase of equipment,  working  capital and general
                            corporate purposes. See "Use of Proceeds."

Risk Factors and Dilution. An  investment  in  the   securities  offered  hereby
                            involves  a high  degree of risk and  immediate  and
                            substantial  dilution  to  the  purchasers  in  this
                            Offering. See "Risk Factors" and "Dilution."

Proposed AMEX Symbols(2):

 Common Stock ........... JNR

 Warrants ............... JNRW


- ----------
(1) Excludes   378,114   shares  of  Common  Stock  issuable  upon  exercise  of
    outstanding  non-plan stock options and  outstanding  stock options  granted
    under the Company's  1993  Incentive  Stock Plan as of January 31, 1997 at a
    weighted  average  exercise price of $0.90 per share,  and 350,000 shares of
    Common Stock  reserved for issuance under the Company's 1997 Stock Plan. See
    "Management -- Employee Benefit Plans."

(2) Application has been made for listing of the Common Stock and the
    Warrants on AMEX.

    Jenner(tm) and ACT (tm) are trademarks of the Company. The Company has filed
an application to register JennerTech(tm) as a trademark of the Company.


- --------------------------------------------------------------------------------

                                       5



- --------------------------------------------------------------------------------

                          SUMMARY FINANCIAL INFORMATION






<TABLE>
<CAPTION>
                                                                 
                                             PERIOD FROM                                          PERIOD FROM
                                              INCEPTION                                            INCEPTION
                                            (DECEMBER 8,                                         (DECEMBER 8,
                                              1992) TO        YEAR ENDED DECEMBER 31,              1992) TO
                                             DECEMBER 31,  ----------------------------------     DECEMBER 31,
                                                1993          1994        1995         1996          1996
                                                ----          ----        ----         ----          ----
STATEMENT OF OPERATIONS DATA:
<S>                                           <C>          <C>         <C>         <C>            <C>    
Revenues                                      $  --        $   --      $   --      $    --        $    --
Research and development expenses               338,626      499,366     698,303     2,206,900      3,743,195
General and administrative expenses             137,325      228,114     195,663       339,948        901,050
                                              ---------    ---------   ---------   -----------    -----------
Loss from operations                           (475,951)    (727,480)   (893,966)   (2,546,848)    (4,644,245)
Interest income (expense)                         9,037       22,369      17,100      (140,987)       (92,481)
                                              ---------    ---------   ---------   -----------    ----------- 
Net loss                                      $(466,914)   $(705,111)  $(876,866)  $(2,687,835)   $(4,736,726)
                                              =========    =========   =========   ===========    =========== 
Pro forma net loss per share(1)                                                    $     (0.56)
                                                                                   =========== 
Shares used to compute pro forma net loss
  per share(1)                                                                       4,785,863
                                                                                   ===========
</TABLE>


<TABLE>
<CAPTION>
                                                                                     DECEMBER 31, 1996
                                                                                  -------------------------
                                                                                                   AS
                                                                                   ACTUAL      ADJUSTED(2)
                                                                                   ------     -----------
<S>                                                                            <C>            <C>
BALANCE SHEET DATA:
Working capital                                                                $  1,317,447    $ 17,697,447
Total assets                                                                      1,563,392      17,943,392
Note payable to principal stockholder                                             3,000,000       3,000,000
Deficit accumulated during the development stage                                 (4,736,726)     (4,736,726)
Total stockholders' equity (deficit)                                             (1,852,170)     14,527,830
</TABLE>


- ----------
(1)  See Note 1 of Notes  to  Financial  Statements  for an  explanation  of the
     determination  of the number of shares  used to compute  pro forma net loss
     per share.

(2)  Adjusted to give effect to the receipt of the estimated net proceeds
     of the Offering based upon an assumed initial public offering price
     of $7.50 per Share and $.10 per Warrant. See "Use of Proceeds" and
     "Capitalization."



- --------------------------------------------------------------------------------

                                       6






                                  RISK FACTORS

    An investment in the  Securities  offered  hereby  involves a high degree of
risk. In addition to the other  information  contained in this  Prospectus,  the
following risk factors should be considered  carefully in evaluating the Company
and its business before  purchasing the Securities  offered hereby.  Prospective
investors  should be in a position to risk the loss of their entire  investment.
This  Prospectus  contains  forward-looking   statements.  Such  forward-looking
statements include, but are not limited to, the Company's expectations regarding
its future  financial  condition and  operating  results,  product  development,
business and growth strategy, market conditions and competitive environment. The
Company's actual results could differ materially from those anticipated in these
forward-looking  statements as a result of certain factors,  including those set
in the following risk factors and elsewhere in this Prospectus.

DEVELOPMENT STAGE COMPANY; LIMITED OPERATING HISTORY; NO REVENUES AND NO
ASSURANCE OF PROFITABILITY

    The Company is in the development stage and is subject to all business risks
associated  with a new enterprise,  including  uncertainties  regarding  product
development, constraints on the Company's financial and personnel resources, and
dependence on and need for third party relationships.  At December 31, 1996, the
Company had an accumulated  deficit of approximately  $4.7 million.  The Company
anticipates  that it will  continue to incur  substantial  additional  operating
losses for at least the next  several  years and  expects  cumulative  losses to
increase as the Company's  research and development  efforts expand. The Company
has a limited history of operations  consisting  primarily of development of its
products and  sponsorship of research and clinical  trials.  The Company has not
generated  any revenue to date,  whether  from  product  sales,  license fees or
research funding, and there can be no assurance as to when or whether it will be
able  to  develop  sources  of  revenue  or  that  its  operations  will  become
profitable,  even if it is able to commercialize any products. See "Management's
Discussion and Analysis of Financial Condition and Results of Operations."

NO ASSURANCE OF SUCCESSFUL PRODUCT DEVELOPMENT OR COMMERCIALIZATION;
UNCERTAINTIES RELATED TO CLINICAL TRIALS

    The Company's  research and  development  programs are at various  stages of
development,  ranging from the preclinical  stage to Phase III clinical  trials.
Substantial  additional  research and development will be necessary in order for
the  Company  to  develop  and  obtain  regulatory   approval  for  its  product
candidates,  and there  can be no  assurance  that the  Company's  research  and
development  will lead to  development of products that are shown to be safe and
effective in clinical trials and that are  commercially  viable.  In addition to
further research and development,  the Company's product candidates will require
clinical  testing,   regulatory   approval  and  development  of  marketing  and
distribution  channels,  all  of  which  are  expected  to  require  substantial
additional investment prior to commercialization. There can be no assurance that
the Company's  products  will be  successfully  developed,  prove to be safe and
efficacious in clinical trials, meet applicable regulatory standards, be capable
of being produced in commercial  quantities at acceptable costs, be eligible for
third party reimbursement from governmental or private insurers, be successfully
marketed or achieve market acceptance. Further, the Company's products may prove
to have  undesirable or unintended  side effects that may prevent or limit their
commercial use.

    The Company may find,  at any stage of its  research and  development,  that
products which appeared promising in preclinical studies or Phase I and Phase II
clinical trials do not demonstrate  efficacy in larger-scale  Phase III clinical
trials and do not receive  regulatory  approvals.  The results from  preclinical
testing and early clinical  trials may not be predictive of results  obtained in
later clinical trials and large-scale  testing.  Companies in the pharmaceutical
and  biotechnology  industries  have  suffered  significant  setbacks in various
stages of clinical  trials,  even in advanced  clinical  trials after  promising
results  had  been  obtained  in  earlier  trials.   Accordingly,   any  product
development  program  undertaken by the Company may be curtailed,  redirected or
eliminated at any time. The rate of completion of the Company's  clinical trials
may be  delayed by many  factors,  including  slower  than  anticipated  patient
enrollment,  difficulty  in  securing  sufficient  supplies  of  clinical  trial
materials or adverse events occurring during the clinical trials.  Completion 



                                       7



of testing,  studies and trials may take several  years,  and the length of time
varies substantially with the type, complexity,  novelty and intended use of the
product. In addition, data obtained from preclinical and clinical activities are
susceptible  to varying  interpretations,  which could  delay,  limit or prevent
regulatory  approval.  Delays or rejections may be  encountered  based upon many
factors,  including  changes in  regulatory  policy during the period of product
development.  No assurance  can be given that any of the  Company's  development
programs  will be  successfully  completed,  that any  Investigational  New Drug
application  ("IND") will become  effective or that  additional  clinical trials
will be allowed by the United  States  Food and Drug  Administration  ("FDA") or
other  regulatory  authorities or that clinical trials will commence as planned.
In addition,  there have been delays in the  Company's  testing and  development
schedules  to date and there can be no  assurance  that the  Company's  expected
testing  and  development  schedules  will be met which  could  have a  material
adverse effect on the Company.  See "Business -- Jenner's Product Candidates and
Clinical Trials."

DEPENDENCE ON THIRD PARTY MANUFACTURING; RISKS OF CHANGING MANUFACTURING
SOURCES

    The Company relies on third parties for the  manufacture of products used in
clinical  trials.  The Company  anticipates  that current  manufacturers  of its
product   candidates  will  not  necessarily   manufacture  these  products  for
subsequent clinical trials, and will not manufacture the products for commercial
use  should  the  clinical  trials be  successful  and  regulatory  approval  be
obtained.  As a result, the Company will need to obtain alternate  manufacturing
sources  for  its  products.   Applicable   regulations  require  that,  if  the
manufacturing  source of products such as the  Company's  vaccines or macrophage
activators is changed,  equivalency must be demonstrated  before patients can be
treated  with  product  from the new  manufacturer.  The  demonstration  of such
equivalency may require that additional  clinical trials be conducted.  There is
no assurance  that the Company will be able to demonstrate  equivalency  and the
effort to do so may  require  significant  expenditures  of money and time which
could  have  a  material  adverse  effect  on  the  Company.  See  "Business  --
Manufacturing and Supply."

DEPENDENCE ON AND NEED FOR THIRD PARTY RELATIONSHIPS

    The Company  follows a business  strategy of  utilizing  the  expertise  and
resources of third parties in a number of areas,  including the  manufacture  of
vaccines and  macrophage  activators  and their  components,  and the conduct of
preclinical and clinical  trials.  This strategy creates risks to the Company by
placing critical aspects of the Company's business in the hands of third parties
whom  the  Company  may  not be  able  to  control  as  effectively  as its  own
operations.  Moreover,  in reliance on these relationships,  the Company has not
developed its own resources to the extent these  activities have been contracted
to third  parties.  Currently,  the Company relies on these third parties as the
sources of supply for their  respective  products  or  services.  If these third
parties do not  perform in a timely and  satisfactory  manner,  the  Company may
incur  additional  costs and lose time in the  conduct  of its  development  and
clinical  programs as it seeks alternate  sources of such products and services,
if  available.  The effect of such costs and delays may have a material  adverse
effect on the Company. See "Business -- Business Strategy."

    The Company may seek additional third party  relationships in certain areas,
particularly  in  situations  in which the Company  believes  that the  clinical
testing,  marketing,  manufacturing  and  other  resources  of a  pharmaceutical
company  collaborator will enable the Company to develop particular  products or
geographic  markets which are otherwise  beyond the Company's  resources  and/or
capabilities.  There is no assurance that the Company will be able to obtain any
such  collaboration,  or any other research and development,  manufacturing,  or
clinical  trial  agreement.  The inability of the Company to obtain and maintain
satisfactory relationships with third parties may have a material adverse effect
on the Company.

NEED FOR SUBSTANTIAL ADDITIONAL FUNDS

    The Company's  operations to date have consumed  substantial  and increasing
amounts of cash. The negative cash flow from  operations is expected to continue
and  to  accelerate  in  the  foreseeable   future.  The  Company  will  require
substantial  funds of its own, or from third  parties,  to conduct  research and
development,  preclinical  and  clinical  testing  and to  manufacture  (or have
manufactured) and market (or have marketed) its product candidates.  The Company
estimates  that its current cash  resources and the


                                       8



net  proceeds of the  Offering  will be  sufficient  to meet its  operating  and
capital  requirements  for at least  12  months  following  the  closing  of the
Offering.  However,  the Company's cash  requirements  may vary  materially from
those now planned  because of results of research  and  development,  results of
preclinical  and  clinical  testing,   relationships   with  possible  strategic
partners,  changes in the focus and  direction  of the  Company's  research  and
development programs, competitive and technological advances, the FDA regulatory
process and other factors. The net proceeds of this Offering are not expected to
be sufficient to fund the Company's operations through the  commercialization of
one or more  products  yielding  sufficient  revenues to support  the  Company's
operations;  therefore, the Company is likely to need to raise additional funds.
The Company may seek to satisfy its future funding  requirements  through public
or private  offerings of securities,  with  collaborative or other  arrangements
with major pharmaceutical companies or from other sources.  Additional financing
may not be  available  when needed or on terms  acceptable  to the  Company.  If
adequate financing is not available,  the Company may not be able to continue as
a going concern, or may be required to delay, scale back or eliminate certain of
its research and development  programs,  to relinquish  rights to certain of its
technologies  or product  candidates,  to forego  desired  opportunities,  or to
license third parties to commercialize products or technologies that the Company
would  otherwise  seek to  develop  itself.  To the extent  the  Company  raises
additional  capital by issuing  equity  securities,  ownership  dilution  to the
investors  in this  Offering  will  result.  See  "Management's  Discussion  and
Analysis of Financial  Condition and Results of Operations"  and Note 1 of Notes
to Financial Statements.

NO MANUFACTURING, MARKETING OR SALES

    The Company currently has no marketing and sales resources or personnel.  In
the event the Company  successfully  completes  the  regulatory  process for the
introduction of a vaccine or macrophage activator product, the Company will need
to  establish   distribution,   marketing  and  sales   resources  in  order  to
commercialize such product.  Depending upon the product, the Company may seek to
develop its own  distribution,  marketing  and sales  resources,  or may seek to
enter a  collaborative  agreement with a major  pharmaceutical  company for such
purposes.  There is no assurance  that the Company will be  successful in either
situation. The inability of the Company to successfully  distribute,  market and
sell products will adversely  affect the  commercial  value of such products and
may adversely affect the financial position of the Company. In view of the early
stage of  development  of the  Company's  potential  products and the  Company's
limited resources,  the Company does not anticipate  spending a material portion
of  the  net  proceeds  of  this  Offering  to  acquire  resources  and  develop
capabilities in distribution, marketing or sales. See "Business -- Marketing and
Distribution."

    The Company does not have a manufacturing facility, and thus currently lacks
the resources or capability to manufacture  itself any of its product candidates
on a clinical or commercial  scale.  At the present time,  the Company  believes
that there are a number of facilities with FDA approval that have the capability
of  synthesizing  and  manufacturing   the  Company's   products  and  liposomal
formulations.  However,  the  process  for  manufacturing  and  formulating  the
Company's  products  is complex  and  subject to  uncertainties.  The Company is
currently, and will continue to be, dependent on third parties for manufacturing
clinical  and  commercial  scale  quantities  of its  products.  There can be no
assurance that the Company will be able to maintain existing  agreements for the
manufacturing of clinical quantities of products,  that it will be able to enter
into  additional  agreements  with other  third  parties  for  commercial  scale
manufacturing, or that contract manufacturers will be able to adequately produce
the Company's  products in commercial  quantities  in a  cost-effective  manner.
Interruptions  or  difficulties  in clinical  or  commercial  production  of the
Company's products may require the Company to incur substantial costs to address
the situation,  which could have a material adverse effect on the Company. See "
- --  Dependence  on Third Party  Manufacturing;  Risks of Changing  Manufacturing
Sources" and "Business -- Manufacturing and Supply."

    Contract  manufacturers must adhere to current Good  Manufacturing  Practice
("cGMP")  regulations  strictly  enforced by the FDA on an ongoing basis through
its facilities inspection program. Contract manufacturing facilities must pass a
pre-approval  plant  inspection  before the FDA will approve a Biologic  License
Application  ("BLA") or a Product License  Application ("PLA") and Establishment
License 

                                       9




Application  ("ELA"). Certain  material  manufacturing  changes that occur after
approval are also subject to FDA review and clearance or approval.  There can be
no assurance that the FDA or other regulatory  agencies will approve the process
or the  facilities by which any of the Company's  products may be  manufactured.
The Company's  dependence on third parties for the  manufacture  of products may
adversely  affect the  Company's  ability to develop and  deliver  products on a
timely and competitive basis. See " -- No Assurance of FDA Approval;  Government
Regulation" and "Business -- Government Regulation."

UNCERTAIN ABILITY TO PROTECT PATENTS AND PROPRIETARY INFORMATION

    The  pharmaceutical  and  biotechnology  fields are characterized by a large
number of patent filings,  and a substantial number of patents have already been
issued to other  pharmaceutical and biotechnology  companies.  Third parties may
have  filed  applications  for or  have  been  issued  patents  and  may  obtain
additional  patents and  proprietary  rights  related to  products or  processes
competitive  with or similar to those of the  Company.  The  Company  may not be
aware of all of the patents  potentially adverse to the Company's interests that
may have been issued to others.  No assurance  can be given that such patents do
not exist,  have not been filed, or could not be filed or issued,  which contain
claims relating to the Company's technology,  products or processes.  If patents
have been or are issued to others  containing  preclusive or conflicting  claims
and such  claims are  ultimately  determined  to be valid,  the  Company  may be
required  to obtain  licenses  to one or more of such  patents  or to develop or
obtain  alternate  technology.  There can be no assurance that the licenses that
might be required for the Company's  processes or products would be available on
commercially acceptable terms, or at all.

    Because  of the  substantial  length  of time and  expense  associated  with
bringing new products to the marketplace  through the development and regulatory
approval process, the biotechnology  industry places considerable  importance on
patent and trade secret protection for new technologies, products and processes.
Since patent  applications  in the United States are maintained in secrecy until
patents issue and since  publication  of discoveries in the scientific or patent
literature  often lag behind actual  discoveries,  the Company cannot be certain
that it (or any  licensor)  was the  first to make  the  inventions  covered  by
pending patent  applications  or that it (or any licensor) was the first to file
patent  applications  for such  inventions.  The patent positions of vaccine and
biotechnology  companies can be highly  uncertain and involve  complex legal and
factual  questions,  and therefore the breadth of claims  allowed in vaccine and
biotechnology patents or their enforceability, cannot be predicted. There can be
no assurance that any patents under pending patent  applications  or any further
patent applications will be issued. Furthermore,  there can be no assurance that
the  scope  of  any  patent  protection  will  exclude  competitors  or  provide
competitive  advantages to the Company,  that any of the Company's  patents that
have issued or may be issued will be held valid if  subsequently  challenged  or
that  others,  including  competitors  or  current  or former  employers  of the
Company's  employees,  advisors  and  consultants,  will not claim  rights in or
ownership to the patents and other proprietary rights held by the Company. There
can be no assurance  that others will not  independently  develop  substantially
equivalent  proprietary  information or otherwise obtain access to the Company's
proprietary  information  or that  others  may not be  issued  patents  that may
require  licensing  and the  payment of  significant  fees or  royalties  by the
Company.

    The Company currently  licenses several patents and patent  applications and
other technology that are integral to the Company's  products and business.  The
Company's  breach of any existing  license  agreement or the failure to obtain a
license to technology required to commercialize its products candidates may have
a material adverse effect on the Company. See "Business -- Licenses."

    The biotechnology  industry has experienced  extensive  litigation regarding
patent and other intellectual  property rights.  Accordingly,  the Company could
incur substantial costs in defending itself in suits that may be brought against
the Company claiming infringement of the patent rights of others or in asserting
the Company's  patent rights in a suit against  another  party.  The Company may
also be required to  participate  in  interference  proceedings  declared by the
United  States Patent and Trademark  Office for the purpose of  determining  the
priority of inventions in connection with the patent applications of the Company
or  other  parties.   Adverse   determinations  in  litigation  or  interference
proceedings  could  require  the  Company  to seek  licenses  (which  may not be
available  on  commercially   reasonable   terms)  or  subject  the  Company  to
significant  liabilities to third parties,  and could  therefore


                                       10




have a material  adverse effect on the Company.  Even if the Company prevails in
an interference  proceeding or a lawsuit,  substantial resources of the Company,
including the time and attention of its officers, will be required.

    The  Company  also  relies  on trade  secrets,  know-how  and  technological
advancement  to maintain  its  competitive  position.  Although the Company uses
confidentiality  agreements and employee  proprietary  information and invention
assignment  agreements  to  protect  its  trade  secrets  and  other  unpatented
know-how,  these  agreements  may be breached by the other party  thereto or may
otherwise be of limited effectiveness or enforceability.

     The  Company  is  aware  of a  company  that has  filed  an  intent  to use
application in the United States Patent and Trademark  Office for the mark "Onco
Vax" relating to  therapeutic  vaccines for  oncological  purposes.  The Company
believes that it has superior  rights to use "OncoVax" based upon its public use
of the mark in  technical  journals  prior to the  effective  filing date of the
intent to use  application.  However,  there can be no assurance in this regard,
and the Company may be required to discontinue using "OncoVax" as a name for its
products.

DEPENDENCE ON QUALIFIED PERSONNEL

    Because of the specialized  scientific nature of the Company's business, the
Company is highly  dependent  upon its ability to attract  and retain  qualified
scientific,  technical and managerial personnel. The loss of the Company's Chief
Executive  Officer,  Anthony E. Maida III, or its President and Chief Scientific
Officer,  Dr. Lynn E. Spitler,  would be highly detrimental to the Company.  The
Company  has an  employment  agreement  with  each  of  these  individuals.  See
"Management  -- Employment  Agreements."  Following  the  Offering,  the Company
expects to maintain key person  insurance for  $1,000,000 on the life of each of
Mr. Maida and Dr. Spitler.  The proceeds of such insurance may not be sufficient
to compensate the Company for the loss of the services of such  individuals  and
is not applicable in the case of resignation.  There is intense  competition for
qualified  personnel  in  the  biotechnology  field,  including  personnel  with
expertise  in product  candidate  identification,  licensing,  clinical  trials,
government  regulation,  manufacturing  marketing and sales, and there can be no
assurance  that the  Company  will be able to  continue  to  attract  and retain
qualified personnel  necessary for the development of its business.  The loss of
the services of existing  personnel as well as the failure to recruit additional
key scientific and technical  personnel in a timely manner could have a material
adverse effect on the Company.

RELATIONSHIPS OF SCIENTIFIC ADVISORS WITH OTHER ENTITIES

    The members of the  Company's  Scientific  Advisory  Board are employed on a
full-time basis by academic or research institutions.  Scientific Advisory Board
Members serve as consultants to the Company, and in some cases as consultants to
other  companies.  Accordingly,  Scientific  Advisory  Board members are able to
devote  only a portion  of their time to the  Company's  business  and  research
activities.  In addition,  except for work performed specifically for and at the
direction  of  the  Company,  the  inventions  or  processes  discovered  by the
Company's  Scientific  Advisory  Board  members and other  consultants  will not
become the  intellectual  property of the Company,  but will be the intellectual
property of their  institutions.  If the Company  desires  access to  inventions
which are not its  property,  it will be  necessary  for the  Company  to obtain
licenses to such inventions from the owners. In addition,  invention  assignment
agreements  executed by Scientific  Advisory  Board members and  consultants  in
connection  with  their  relationships  with the  Company  may be subject to the
rights  of their  primary  employers  or other  third  parties  with  whom  such
individuals have consulting relationships.  See "Business -- Scientific Advisory
Board."

COMPETITION

    There are many  companies,  both  publicly  and  privately  held,  including
well-known  pharmaceutical  companies,  as well as academic  and other  research
institutions, that are engaged in the discovery, development, marketing and sale
of products  for the  treatment  of cancer.  These  include  new  pharmaceutical
products  and  new  biologically   derived  products,   including  vaccines  and
macrophage activators.  The Company expects to encounter significant competition
for its product  candidates  from  traditional  and new treatment  methods.  The
Company  is  aware  of a  number  of  companies  that  have  products  based  on
immunoactivation principles or intended to treat the indications targeted by the
Company, including Avigen, Inc., Akzo Pharma Group, Aphton Corp., Biomira, Inc.,
Cell Genesys,  Inc., Cel-Sci  Corporation,  Centocor,  Inc., Corixa Corporation,
Cytel Corp.,  EndoRex Corp.,  Epigen,  Inc., IDEC Pharmaceutical  Corp., ImClone
Systems,  Inc.,  Janssen  Pharmaceuticals  (a  division  of Johnson &  Johnson),
Medarex,  Inc.,  Oncogene  Sciences,   Inc.,  RIBI  ImmunoChem  Research,  Inc.,
Schering-Plough Corp., Therion Biologics  Corporation,  Chiron Viagene, Inc. and
Vical, Inc. Janssen  Pharmaceuticals and Schering-Plough Corp. recently


                                       11





received  FDA  clearance  to market  products in the United  States for surgical
adjuvant  treatment of  colorectal  carcinoma and  melanoma,  respectively,  and
Centocor, Inc. recently received approval to market a product in Germany for the
adjuvant therapy of colorectal cancer.

    Most  of  the  Company's   competitors   and  potential   competitors   have
substantially greater capital,  research and development  capabilities and human
resources  than  the  Company.  Furthermore,  many  of  these  competitors  have
significantly  greater  experience  than the Company in undertaking  preclinical
testing and clinical trials of new biotechnology  products and obtaining FDA and
other regulatory  approvals.  If the Company is permitted to commence commercial
sales of any product, it will also be competing with companies that have greater
resources and experience in  manufacturing,  marketing and sales.  The Company's
competitors  may succeed in developing  products that are more  effective,  less
costly,  or have a better side effect  profile than any that may be developed by
the Company,  and such competitors may also prove to be more successful than the
Company  in  manufacturing,  marketing  and  sales.  If the  Company  is able to
successfully commercialize a product,  subsequent competitive developments could
render such product noncompetitive or obsolete. See "Business -- Competition."

TECHNOLOGICAL CHANGES AND UNCERTAINTY

    The Company's  research and  development  strategy is based upon advances in
recent years in the scientific  understanding of monoclonal antibodies,  genetic
engineering  and the human immune  system.  The  Company's  strategy  focuses on
techniques to stimulate  the body's  immune system to act against  cancer cells.
This area is the subject of  extensive  research  efforts  and rapid  scientific
progress.  New developments are expected to continue at a rapid pace in industry
and academia in both the specific  areas of interest to the Company and in other
areas  directed  at the  prevention  or  treatment  of  cancer.  There can be no
assurance that research and discoveries by others will not render some or all of
the Company's  proposed products  noncompetitive or obsolete.  In addition,  the
Company's  business strategy is subject to the risks inherent in the development
of new therapeutic products.  There can be no assurance that unforeseen problems
will  not  develop,  that  the  Company  will be able  to  address  successfully
technological  challenges it encounters in its research and development programs
or that  commercially  feasible  products  will  ultimately  be developed by the
Company. See "Business -- Competition."

NO ASSURANCE OF FDA APPROVAL; GOVERNMENT REGULATION

    All new drugs and biologics, including the Company's product candidates, are
subject  to  extensive  and  rigorous  regulation  by  the  federal  government,
principally the FDA under the Federal Food, Drug and Cosmetic Act and other laws
including,  in the case of  biologics,  the Public  Health  Services Act, and by
state and local governments.  Such regulations  govern,  among other things, the
development,  testing,  manufacture,  labeling,  storage, premarket clearance or
approval,  advertising,  promotion,  sale and distribution of such products.  If
drug products are marketed abroad, they also are subject to extensive regulation
by  foreign  governments.  Failure  to comply  with the FDA or other  applicable
regulatory  requirements may subject a Company to  administrative  or judicially
imposed sanctions such as civil penalties,  criminal  prosecution,  injunctions,
product seizure or detention,  product recalls,  total or partial  suspension of
production,  and FDA  refusal  to  approve  pending  BLAs,  PLAs  and  ELAs,  or
supplements to approved BLAs or PLAs/ELAs.

    The Company has not received regulatory approval in the United States or any
foreign jurisdiction for the commercial sale of any of its products. The process
of obtaining FDA and other  required  regulatory  approvals,  including  foreign
approvals,  often  takes  many years and can vary  substantially  based upon the
type,  complexity and novelty of the products involved and the indications being
studied.   Furthermore,   such  approval  process  is  extremely  expensive  and
uncertain.  There can be no assurance that the Company's product candidates will
be cleared for marketing by the FDA.  There can be no assurance that the Company
will have  sufficient  resources  to complete  the  required  regulatory  review
process,  or that the Company could overcome the inability to obtain,  or delays
in obtaining, such approvals. The failure of the Company to receive FDA approval
for its product candidates would preclude the Company from marketing and selling
its products in the United  States.  Therefore,  the failure to receive such FDA
approval would have a material adverse effect on the Company. Even if


                                       12


regulatory approval of a product is granted,  there can be no assurance that the
Company will be able to obtain the labeling  claims  necessary or desirable  for
the  promotion of those  products.  FDA  regulations  prohibit the  marketing or
promotion  of  a  drug  for  unapproved  indications.   Furthermore,  regulatory
marketing approval may entail ongoing requirements for postmarketing studies. If
regulatory  approval is  obtained,  the  Company  will be subject to ongoing FDA
obligations and continued  regulatory review. In particular,  the Company or its
third party  manufacturers  will be required  to adhere to  regulations  setting
forth  cGMPs,  which  require  that the  Company  or third  party  manufacturers
manufacture products and maintain records in a prescribed manner with respect to
manufacturing,  testing and quality control activities.  Further, the Company or
its  third  party  manufacturer  must  pass  a  preapproval  inspection  of  its
manufacturing facilities by the FDA before obtaining marketing approval. Failure
to comply with applicable  regulatory  requirements may result in penalties such
as restrictions  on a product's  marketing or withdrawal of the product from the
market.  In addition,  identification of certain side effects after a drug is on
the market or the occurrence of  manufacturing  problems could cause  subsequent
withdrawal  of  approval,  reformulation  of the  drug,  additional  preclinical
testing or clinical trials and changes in labeling of the product.

    Prior to the submission of a BLA or PLA/ELA,  drugs developed by the Company
must undergo  rigorous  preclinical and clinical  testing which may take several
years and the expenditure of substantial  resources.  Before commencing clinical
trials in humans, the Company must submit to the FDA and receive clearance of an
IND.  There can be no assurance  that  submission of an IND for future  clinical
testing of any product under development or other future products of the Company
would result in FDA permission to commence  clinical  trials or that the Company
will be able to obtain the necessary  approvals for future  clinical  testing in
any foreign jurisdiction. Success in preclinical studies or early stage clinical
trials does not assure  success in later stage  clinical  trials.  Data obtained
from   preclinical   and  clinical   activities   are   susceptible  to  varying
interpretations  which  could  delay,  limit  or  prevent  regulatory  approval.
Further,  there can be no  assurance  that if such  testing  of  products  under
development  is completed,  any such drug  compounds will be accepted for formal
review by the FDA or any  foreign  regulatory  body,  or approved by the FDA for
marketing  in the United  States or by any such  foreign  regulatory  bodies for
marketing in foreign  jurisdictions.  Future  federal,  state,  local or foreign
legislation  or  administrative  acts  could also  prevent  or delay  regulatory
approval of the Company's products. See "Business -- Government Regulation."

UNCERTAIN AVAILABILITY OF HEALTH CARE REIMBURSEMENT; HEALTH CARE REFORM

    The Company's ability to commercialize its product  candidates may depend in
part on the extent to which  reimbursement for the costs of such product will be
available from  government  health  administration  authorities,  private health
insurers  and others.  Significant  uncertainty  exists as to the  reimbursement
status of newly approved health care products.  There can be no assurance of the
availability  of adequate  third-party  insurance  reimbursement  coverage  that
enables the Company to  establish  and  maintain  price  levels  sufficient  for
realization  of an appropriate  return on its investment in developing  vaccines
and  biological   products.   Government  and  other   third-party   payors  are
increasingly  attempting to contain  health care costs by limiting both coverage
and the  level  of  reimbursement  for new  therapeutic  products  approved  for
marketing by the FDA and by refusing, in some cases, to provide any coverage for
uses of  approved  products  for disease  indications  for which the FDA has not
granted marketing  approval.  If adequate coverage and reimbursement  levels are
not provided by  government  and  third-party  payors for uses of the  Company's
product  candidates,  the market acceptance of these products would be adversely
affected.

    Health care reform proposals have been introduced in Congress and in various
state  legislatures.  It is currently  uncertain  whether any health care reform
legislation  will be enacted at the federal level, or what actions  governmental
and private  payors may take in response to the suggested  reforms.  The Company
cannot predict when any proposed  reforms will be  implemented,  if ever, or the
effect of any  implemented  reforms on the Company's  business.  There can be no
assurance that any implemented  reforms will not have a material  adverse effect
on the  Company.  Such  reforms,  if  enacted,  may affect the  availability  of
third-party  reimbursement for products  developed by the Company as well as the
price levels at which the Company is able to sell such products. In addition, if
the Company is able to commercialize products in overseas markets, the Company's
ability to achieve  success in such markets may depend,  in part,  on the health
care financing and reimbursement policies of such countries.

                                       13






RISK OF PRODUCT LIABILITY; UNCERTAINTY OF AVAILABILITY OF PRODUCT
LIABILITY INSURANCE

    The Company's business exposes it to potential product liability risks which
are inherent in the manufacturing,  clinical testing, marketing and use of human
therapeutic  products.  The Company  currently  carries clinical trial liability
insurance  in the  amount of $1  million  per  occurrence  and $1 million in the
aggregate,  although this insurance does not currently  cover the on-going Phase
III clinical trial for ACT.  There can be no assurance that the coverage  limits
of the Company's  insurance  policy will be adequate,  and a successful claim in
excess of the  coverage  limits  could  have a  material  adverse  effect on the
Company.  The Company plans to obtain product liability  insurance  covering the
commercial sale of its products prior to their commercial introduction, however,
there can be no  assurance  that the Company  will be able to obtain or maintain
such insurance on acceptable  terms or that any insurance  obtained will provide
adequate coverage against potential  liabilities.  Claims or losses in excess of
any liability  insurance  coverage now carried or  subsequently  obtained by the
Company could have a material adverse effect on the Company.

POTENTIAL ADVERSE EFFECT OF SHARES ELIGIBLE FOR FUTURE SALE

    Sales  of  Common  Stock  (including  shares  issued  upon the  exercise  of
outstanding  options) in the public market after this Offering could  materially
and adversely  affect the market price of the Securities.  Such sales also might
make  it  more   difficult  for  the  Company  to  sell  equity   securities  or
equity-related  securities  in the future at a time and price  that the  Company
deems appropriate.  Upon the completion of this Offering,  the Company will have
7,121,886 shares of Common Stock  outstanding  (not including  378,114 shares of
Common Stock  subject to  outstanding  options)  assuming no exercise of options
after  January 31,  1997 and  outstanding  warrants  to  purchase an  additional
2,500,000 shares of Common Stock,  assuming no exercise of the  Representative's
Warrant.  Of these securities,  2,500,000 shares of Common Stock and Warrants to
purchase  2,500,000  shares of Common Stock sold in this Offering will be freely
tradeable  (unless held by affiliates of the Company) without  restriction.  The
remaining  4,621,886 shares will be restricted  securities within the meaning of
the Securities  Act of 1933, as amended (the  "Securities  Act").  The Company's
directors,  executive officers and stockholders,  who in the aggregate hold 100%
of the shares of Common Stock of the Company  outstanding  immediately  prior to
the  completion of this  Offering,  have entered into lock-up  agreements  under
which they have agreed not to sell, directly or indirectly,  any shares owned by
them for a period of 12 months  after the date of this  Prospectus  without  the
prior written consent of the Representative. The Representative may, in its sole
discretion  and at any time  without  notice,  release all or any portion of the
shares  subject to such  lock-up  agreements.  Upon  expiration  of the 12-month
lock-up   agreements,   2,927,449   shares  of  Common   Stock  (not   including
approximately  228,403  shares subject to  outstanding  vested  options) held by
existing  stockholders will be eligible for immediate public resale,  subject in
some  cases to  volume  limitations  pursuant  to Rule  144,  and the  remaining
1,694,437 shares held by existing  stockholders  will become eligible for public
resale at various  times  over a period of less than two years,  subject in some
cases to vesting provisions and volume limitations. In addition, 12 months after
the  completion of this  Offering,  250,000 shares of Common Stock issuable upon
exercise of the  Representative's  Warrants and the Warrants to purchase 250,000
shares of Common Stock issuable upon exercise of the  Representative's  Warrants
will  be  available  for  sale.  Also,   1,860,680  of  the  shares  outstanding
immediately  following  the  completion  of this  Offering  will be  entitled to
registration  rights with  respect to such shares  upon  termination  of lock-up
agreements.  The number of shares sold in the public  market  could  increase if
registration  rights are exercised and such sales may have an adverse  effect on
the market price of the Common Stock.  See  "Description  of Capital  Stock" and
"Shares Eligible for Future Sale."

CONCENTRATION OF OWNERSHIP

    Upon  consummation  of this  Offering,  the  directors  and  officers of the
Company (and certain members of their families) will  beneficially own 4,529,387
shares of the Company's Common Stock or  approximately  63.6% of the outstanding
shares of Common Stock  following the completion of this Offering.  Accordingly,
the Company's  officers and directors  will have the ability to elect a majority
of the Company's  directors and otherwise  control the Company.  See  "Principal
Stockholders."

                                       14






IMMEDIATE SUBSTANTIAL DILUTION; DISPARITY OF CONSIDERATION

    Purchasers of Securities  in this  Offering  will  experience  immediate and
substantial  dilution  in the net  tangible  book  value of the shares of Common
Stock and Warrants purchased by them in this Offering. The immediate dilution to
purchasers of the Securities  offered hereby is $5.46 per share of Common Stock,
assuming  an  initial  public  offering  price of $7.50  per  share.  Additional
dilution to future net tangible book value per share may occur upon the exercise
of the  Warrants,  the  Representative's  Warrants  and  the  options  that  are
outstanding  or to be issued  under the  Company's  option  plans.  The  current
stockholders  of the Company,  including the Company's  officers and  directors,
acquired  their  shares  of  Common  Stock  for  nominal  consideration  or  for
consideration substantially less than the public offering price of the shares of
Common Stock offered hereby. As a result,  new investors will bear substantially
all of the risks inherent in an investment in the Company. See "Capitalization,"
"Dilution" and "Certain Transactions."

ANTI-TAKEOVER EFFECT OF DELAWARE LAW AND CERTAIN CHARTER AND BYLAWS
PROVISIONS

    Certain  provisions of Delaware law applicable to the Company could delay or
make more  difficult  a merger,  tender  offer or proxy  contest  involving  the
Company,  including  Section 203 of the Delaware General  Corporation Law, which
prohibits a Delaware  corporation from engaging in any business combination with
any interested  stockholder for a period of three years from the date the person
became an interested stockholder unless certain conditions are met. In addition,
the Board of  Directors  of the  Company  may issue  shares of  Preferred  Stock
without  stockholder  approval  on such  terms as the Board may  determine.  The
rights of the holders of Common  Stock will be subject to, and may be  adversely
affected by, the rights of the holders of any Preferred Stock that may be issued
in the future.  In addition,  the Company's  Certificate  of  Incorporation  and
Bylaws  eliminate the right of  stockholders to act by written consent without a
meeting,  eliminate  cumulative  voting in the election of directors and specify
procedures  for director  nominations  by  stockholders  and submission of other
proposals for consideration at stockholder meetings.  All of the foregoing could
have the effect of delaying,  deferring or preventing a change in control of the
Company and could limit the price that certain investors might be willing to pay
in the future for shares of the Company's  Common  Stock.  See  "Description  of
Capital Stock."

ABSENCE OF DIVIDENDS

    The Company has never  declared or paid  dividends  on its Common  Stock and
does not intend to pay any dividends in the  foreseeable  future.  See "Dividend
Policy."

ARBITRARY DETERMINATION OF OFFERING PRICE; NO PUBLIC MARKET FOR THE SECURITIES

    The initial public  offering price of the Securities and the exercise prices
and terms of the  Warrants  have been  determined  arbitrarily  by  negotiations
between  the  Company  and  the  Representative.   Factors  considered  in  such
negotiations, in addition to prevailing market conditions,  included the history
and prospects for the industry in which the Company  competes,  an assessment of
the Company's  management,  the prospects of the Company,  its capital structure
and  certain  other  factors  as were  deemed  relevant.  Therefore,  the public
offering  price of the  Securities  and the  exercise  prices  and  terms of the
Warrants do not  necessarily  bear any  relationship  to  established  valuation
criteria and  therefore  may not be indicative of prices that may prevail at any
time or from time to time in the public market for the Securities. Prior to this
Offering,  there has been no public market for the Securities,  and there can be
no assurance that an active trading market will develop in any of the Securities
after the Offering, or, if developed, be sustained. See "Underwriting."

PRICE VOLATILITY

    The securities markets have from time to time experienced  significant price
and volume  fluctuations  that may be unrelated to the operating  performance of
particular companies. In addition, the market prices of the common stock of many
publicly traded pharmaceutical or biotechnology companies have in the past been,
and can in the future be expected to be, especially volatile. Announcements of

                                       15





technological  innovations  or new  products by the Company or its  competitors,
developments or disputes  concerning  patents or proprietary  rights,  publicity
regarding actual or potential  clinical trial results relating to products under
development by the Company or its competitors,  regulatory  developments in both
the United States and foreign  countries,  delays in the  Company's  testing and
development schedules, public concern as to the safety of vaccines or biological
products and economic and other external  factors,  as well as  period-to-period
fluctuations in the Company's  financial results,  may have a significant impact
on the market  prices of the  Securities.  The  realization  of any of the risks
described in these "Risk Factors" could have a significant and adverse impact on
such market prices.

POTENTIAL ADVERSE EFFECT OF REPRESENTATIVE'S WARRANTS

    At  the  consummation  of  the  Offering,  the  Company  will  sell  to  the
Representative  for  nominal  consideration  the  Representative's  Warrants  to
purchase up to 250,000  shares of Common  Stock  and/or  250,000  Warrants.  The
Representative's  Warrants  will be  exercisable  for a  period  of  four  years
commencing one year after the effective  date of this  Offering,  at an exercise
price of $ per Share and $ per Warrant [140% of the respective  public  offering
prices of the Shares and the Warrants].  The Warrants  obtained upon exercise of
the  Representative's  Warrants will be  exercisable  for a period of four years
commencing one year after the effective  date of this  Offering,  at an exercise
price of $ per share [140% of the initial public offering price per Share].  For
the term of the  Representative's  Warrants,  the holders  thereof will have, at
nominal cost,  the  opportunity to profit from a rise in the market price of the
Securities without assuming the risk of ownership,  with a resulting dilution in
the interest of other security holders. As long as the Representative's Warrants
remain unexercised,  the Company's ability to obtain additional capital might be
adversely affected. Moreover, the Representative may be expected to exercise the
Representative's  Warrants at a time when the Company would,  in all likelihood,
be able to obtain any needed capital through a new offering of its securities on
terms more favorable than those provided by the Representative's  Warrants.  See
"Underwriting."

POTENTIAL ADVERSE EFFECT OF REDEMPTION OF WARRANTS

    Commencing  18 months  after the date of this  Prospectus,  the Warrants are
subject to redemption  at $0.10 per Warrant on 30 days' prior written  notice to
the Warrant  holders if the average  closing  sales price of the Common Stock as
reported on the AMEX  equals or exceeds $ per share [160% of the initial  public
offering  price per Share of Common  Stock]  for any 20  trading  days  within a
period of 30  consecutive  trading days ending on the fifth trading day prior to
the date of the notice of redemption.  If the Warrants are redeemed,  holders of
the Warrants will lose their rights to exercise the Warrants upon  expiration of
the 30 day notice of redemption period.  Upon receipt of a notice of redemption,
holders  would be required to (i)  exercise  the  Warrants  and pay the exercise
price at a time when it may be disadvantageous  for them to do so, (ii) sell the
Warrants at the current market price,  if any, when they might otherwise wish to
hold the  Warrants or (iii)  accept the  redemption  price which is likely to be
substantially  less  than  the  market  value  of the  Warrants  at the  time of
redemption. See "Description of Securities -- Warrants."

POTENTIAL ADVERSE EFFECT OF SUBSTANTIAL SHARES OF COMMON STOCK RESERVED

    The Company has  reserved a total of  3,728,114  shares of Common  Stock for
issuance as follows:  (i)  2,500,000  shares for issuance  upon  exercise of the
2,500,000  Warrants;  (ii)  250,000  shares for  issuance  upon  exercise of the
Representative's  Warrants;  (iii) 250,000  shares for issuance upon exercise of
the Warrants  issuable  upon  exercise of the  Representative's  Warrants;  (iv)
378,114  shares for issuance upon  exercise of non-plan  stock options and stock
options  granted  under the  Company's  1993 Stock Option Plan;  and (v) 350,000
shares that may be granted  under the  Company's  1997 Stock Plan  following the
Offering. The existence of the Warrants,  the Representative's  Warrants and any
other  options  or  warrants  may  adversely  affect  the  Company's  ability to
consummate future equity financings.  Further,  the holders of such warrants and
options may exercise them at a time when the Company would  otherwise be able to
obtain additional equity capital on terms more favorable to the Company.


                                       16




REPRESENTATIVE'S INFLUENCE ON THE MARKET

    A  significant  amount  of the  Securities  offered  hereby  may be  sold to
customers  of the  Representative.  Such  customers  subsequently  may engage in
transactions  for the sale or  purchase of such  Securities  through or with the
Representative. If it participates in the market, the Representative may exert a
dominating  influence  on  the  market,  if one  develops,  for  the  Securities
described in this Prospectus. Such market making activity may be discontinued at
any time.  The price and  liquidity  of the Common Stock and the Warrants may be
significantly   affected  by  the  degree,  if  any,  of  the   Representative's
participation in the market.

LEGAL RESTRICTIONS ON SALES OF SHARES UNDERLYING THE WARRANTS

    The Warrants are not exercisable  unless,  at the time of the exercise,  the
Company has in effect a current  prospectus  covering the shares of Common Stock
issuable upon exercise of the  Warrants,  and such shares have been  registered,
qualified  or  deemed to be exempt  under  the  securities  laws of the state of
residence of the  exercising  holder of the  Warrants.  Although the Company has
agreed to keep a  registration  statement  covering  the shares of Common  Stock
issuable upon  exercise of the Warrants  effective for the term of the Warrants,
if it fails to do so for any reason, the Warrants may be deprived of value.

    The  Shares  and  Warrants  are  separately  transferable  immediately  upon
issuance.  Purchasers  may buy Warrants in the  aftermarket  in, or may move to,
jurisdictions in which the shares  underlying the Warrants are not so registered
or qualified during the period that the Warrants are exercisable. In this event,
the  Company  would be  unable  to issue  shares to those  persons  desiring  to
exercise  their  Warrants,  and holders of Warrants  would have no choice but to
attempt to sell the Warrants in a jurisdiction where such sale is permissible or
allow them to expire unexercised. See "Description of Securities."

MANAGEMENT'S BROAD DISCRETION IN USE OF PROCEEDS

    Although the Company  intends to apply the net proceeds of this  Offering in
the manner  described  under "Use of Proceeds," it has broad  discretion  within
such proposed uses as to the precise allocation of the net proceeds,  the timing
of expenditures  and all other aspects of the use thereof.  The Company reserves
the right to  reallocate  the net  proceeds of this  Offering  among the various
categories  set forth  under "Use of  Proceeds"  as it, in its sole  discretion,
deems necessary or advisable. See "Use of Proceeds."

LIMITATION OF LIABILITY AND INDEMNIFICATION

    The Company's  Certificate of  Incorporation  limits,  to the maximum extent
permitted  by the  Delaware  General  Corporations  Law  ("Delaware  Law"),  the
personal  liability  of  directors  for  monetary  damages  for  breach of their
fiduciary  duties as a director.  The Company's  Bylaws provide that the Company
shall  indemnify  its officers and directors and may indemnify its employees and
other  agents to the fullest  extent  permitted  by law. The Company has entered
into  indemnification  agreements  with its  officers and  directors  containing
provisions which are in some respects broader than the specific  indemnification
provisions contained in Delaware Law. The indemnification agreements may require
the Company,  among other  things,  to  indemnify  such  officers and  directors
against certain  liabilities that may arise by reason of their status or service
as directors or officers (other than liabilities arising from willful misconduct
of a culpable  nature),  to advance their  expenses  incurred as a result of any
proceeding  against  them as to which they could be  indemnified,  and to obtain
directors' and officers' insurance if available on reasonable terms. Section 145
of the  Delaware  Law  provides  that a  corporation  may  indemnify a director,
officer, employee or agent made or threatened to be made a party to an action by
reason of the fact that he was a  director,  officer,  employee  or agent of the
corporation or was serving at the request of the  corporation  against  expenses
actually and  reasonably  incurred in  connection  with such action if he or she
acted in good faith and in a manner he or she  reasonably  believed  to be in or
not opposed to the best interests of the  corporation,  and, with respect to any
criminal  action or  proceeding,  had no reasonable  cause to believe his or her
conduct was unlawful.  Delaware Law does not permit a corporation to eliminate a
director's  duty of care,  and the  provisions of the Company's  Certificate  of
Incorporation have no effect on the availability of equitable remedies,  such as
injunction  or  rescission,  for a  director's  breach of the duty of care.  See
"Management -- Limitation of Liability and Indemnification."

                                       17






                                 USE OF PROCEEDS

    The  net  proceeds  to be  received  by the  Company  from  the  sale of the
2,500,000  Shares of Common Stock and 2,500,000  Warrants  offered hereby (after
deducting estimated offering expenses and underwriting  discounts payable by the
Company in  connection  with the  Offering)  are  estimated to be  approximately
$16,380,000 ($19,002,000 if the Underwriters' over-allotment option is exercised
in full) based on an assumed initial public offering price of $7.50 per Share of
Common Stock and $0.10 per Warrant.

    The Company intends to use most of the net proceeds of this Offering to fund
its  research  and  development  efforts,  including  clinical  and  preclinical
studies.  In addition,  the Company intends to use approximately $1.1 million of
the net proceeds to establish and equip a small  laboratory  facility to support
its research and development activities.  The remainder of the net proceeds will
be used for  working  capital  and general  corporate  purposes.  The amount and
timing of  expenditures of the net proceeds of this Offering cannot be precisely
determined,  and will depend on numerous  factors,  including  the status of the
Company's product  development  efforts,  the results of clinical trials and the
regulatory  approval  process.  The  Company  may also use a portion  of the net
proceeds to acquire complementary businesses, products or technologies, although
the Company has no  agreements  and is not  involved  in any  negotiations  with
respect  to any such  transaction.  See  "Risk  Factors  --  Management's  Broad
Discretion in Use of Proceeds."  Pending such uses,  the Company plans to invest
the  net  proceeds   from  this   Offering  in   short-term,   investment-grade,
interest-bearing securities.

    The Company  estimates  that its current cash resources and the net proceeds
of  this  Offering  will  be  sufficient  to  meet  its  operating  and  capital
requirements  for at least 12 months  following  the  closing of this  Offering.
However,  there can be no assurance  that the net proceeds of the Offering  will
satisfy  the  Company's  requirements  for any  particular  period of time.  The
Company  anticipates  that additional  funding will be required after the use of
the net proceeds of the Offering. No assurance can be given that such additional
financing will be available when needed on terms  acceptable to the Company,  if
at all. See "Risk Factors -- Need for Substantial Additional Funds."

                                 DIVIDEND POLICY

    The Company has never  declared  nor paid  dividends on its Common Stock and
does not intend to pay any dividends in the foreseeable future.














                                       18




                                 CAPITALIZATION

    The  following  table sets forth,  as of December 31,  1996,  (i) the actual
capitalization  of the  Company  and (ii) the pro  forma  capitalization  of the
Company as adjusted to give effect to the conversion of all  outstanding  shares
of  Preferred   Stock  of  the  Company  into  Common  Stock,   to  reflect  the
reincorporation  of the Company  into the State of  Delaware  and to reflect the
receipt of the estimated  net proceeds from the sale of the 2,500,000  Shares of
Common Stock and 2,500,000  Warrants offered hereby at an assumed initial public
offering  price of $7.50 per Share and $0.10 per  Warrant.  This table should be
read in conjunction  with the financial  statements of the Company and the notes
thereto included elsewhere in this Prospectus.  See "Description of Securities,"
"Use of Proceeds" and "Certain Transactions."


<TABLE>
<CAPTION>
                                                                      DECEMBER 31, 1996
                                                                      -----------------
                                                                                PRO FORMA,
                                                                    ACTUAL      AS ADJUSTED
                                                                    ------      -----------
<S>                                                             <C>           <C>
Note payable to principal stockholder                            $ 3,000,000   $   3,000,000
                                                                 -----------   -------------

Stockholders' equity (net capital deficiency):
  Preferred Stock, par value $0.001 per share;
   5,000,000 shares authorized; 2,616,550 shares issued and
   outstanding on an actual basis, none issued and outstanding
   pro forma, as adjusted                                          2,310,400             --
  Common Stock, par value $0.001 per share;
   30,000,000 shares authorized; 3,111,871 shares issued and
   outstanding on an actual basis, 7,121,886 shares issued
   and outstanding pro forma, as adjusted(1)                        619,156           7,122
  Additional paid-in capital                                            --       19,302,434
  Deferred compensation                                             (45,000)        (45,000)
  Deficit accumulated during the development stage               (4,736,726)     (4,736,726)
                                                                 ----------      ---------- 
  Total stockholders' equity (net capital deficiency)            (1,852,170)     14,527,830
                                                                 ----------      ----------
    Total capitalization                                        $ 1,147,830    $ 17,527,830
                                                                ===========    ============
</TABLE>

- -----------
(1)  Excludes   378,114  shares  of  Common  Stock  issuable  upon  exercise  of
     outstanding  non-plan stock options and  outstanding  stock options granted
     under the Company's 1993  Incentive  Stock Plan as of January 31, 1997 at a
     weighted  average  exercise price of $0.90 per share, and 350,000 shares of
     Common Stock reserved for issuance under the Company's 1997 Stock Plan. See
     "Management -- Employee Benefit Plans."


                                       19





                                    DILUTION

    The pro forma net tangible  book value deficit of the Company as of December
31, 1996 was $(1,852,170),  or $(0.40) per share of Common Stock,  determined by
dividing  the pro  forma net  tangible  book  value of the  Company  (pro  forma
liabilities  in excess of  tangible  assets)  by the  number of shares of Common
Stock  outstanding  as of December  31, 1996  (assuming  the  conversion  of all
outstanding shares of Preferred Stock into Common Stock). After giving effect to
the receipt of the net proceeds of the sale of 2,500,000  shares of Common Stock
and 2,500,000  Warrants  offered hereby at an assumed  initial  public  offering
price of $7.50  per Share and $0.10  per  Warrant,  the  adjusted  pro forma net
tangible  book  value of the  Company  at  December  31,  1996  would  have been
$14,527,830,  or $2.04 per share.  This represents an immediate  increase in pro
forma net tangible book value of $2.44 per share to existing stockholders and an
immediate  dilution of $5.46 per share to new  investors.  The  following  table
illustrates the per share dilution:

 Assumed initial public offering price per share                         $  7.50

   Pro forma net tangible book value deficit per share           $ (.40)
   Increase per share attributable to new stockholders             2.44
                                                                   ----
Pro forma net tangible book value per share after the Offering              2.04
                                                                            ----
Dilution per share to new stockholders                                    $ 5.46
                                                                          ======

    In the event the  Over-allotment  Option is exercised in full, the pro forma
net tangible  book value as of December 31, 1996 would be  $17,149,830  or $2.29
per share of Common  Stock,  which  would  result in  immediate  dilution in net
tangible book value to new investors of approximately $5.21 per share.

    The  following  table  summarizes,  on a pro forma basis as of December  31,
1996, the difference between the number of shares of Common Stock purchased from
the Company,  the total  consideration paid and the average price per share paid
by existing  stockholders  of Common Stock and by the new  investors  purchasing
shares in this  Offering,  assuming the sale of the  2,500,000  Shares of Common
Stock and  2,500,000  Warrants  offered  hereby  at an  assumed  initial  public
offering price of $7.50 per Share and $0.10 per Warrant and before any deduction
of underwriting discounts and estimated offering expenses.


                              NUMBER OF                              
                          SHARES PURCHASED(1)   TOTAL CONSIDERATION    AVERAGE
                          -------------------   -------------------     PRICE  
                           NUMBER   PERCENT      AMOUNT     PERCENT   PER SHARE
                           ------   -------      ------     -------   ---------
Existing stockholders    4,621,886    64.9%   $  2,877,556    13.3%   $ .62
New investors            2,500,000    35.1%    18,750,000     86.7%   $7.50(2)
                         ---------    ----     ----------     ----     
  Total                  7,121,886   100.0%   $21,627,556    100.0%
                         =========   =====    ===========    ===== 


- ---------
(1)  Excludes   378,114  shares  of  Common  Stock  issuable  upon  exercise  of
     outstanding  non-plan stock options and  outstanding  stock options granted
     under the Company's 1993  Incentive  Stock Plan as of January 31, 1997 at a
     weighted  average  exercise price of $0.90 per share, and 350,000 shares of
     Common Stock reserved for issuance under the Company's 1997 Stock Plan. See
     "Management -- Employee Benefit Plans."

(2)  Attributes no value to the Warrants.


                                       20




                          SELECTED FINANCIAL DATA

    The selected financial data set forth below is qualified in its entirety by,
and should be read in  conjunction  with,  the  Financial  Statements  and Notes
thereto and  "Management's  Discussion  and Analysis of Financial  Condition and
Results of Operations"  included elsewhere in this Prospectus.  The statement of
operations  data for the years ended  December 31,  1994,  1995 and 1996 and the
period from December 8, 1992  (inception)  to December 31, 1996, and the balance
sheet  data at  December  31,  1995 and 1996,  are  derived  from the  financial
statements  of Jenner  Technologies,  Inc.  appearing  elsewhere  herein,  which
financial  statements  have  been  audited  by  Ernst & Young  LLP,  independent
auditors,  whose report is included elsewhere in this Prospectus.  The statement
of operations data set forth for the period from inception (December 8, 1992) to
December  31, 1993 and the balance  sheet data as of December  31, 1993 and 1994
were derived from audited  financial  statements  of the Company,  which are not
included in this  Prospectus.  The results for the year ended  December 31, 1996
are not necessarily indicative of the results for any future period.




<TABLE>
<CAPTION>
                                                                 
                                             PERIOD FROM                                          PERIOD FROM
                                              INCEPTION                                            INCEPTION
                                            (DECEMBER 8,                                         (DECEMBER 8,
                                              1992) TO          YEAR ENDED DECEMBER 31,            1992) TO
                                            DECEMBER 31,    ---------------------------------     DECEMBER 31,
                                                1993          1994        1995         1996          1996
                                            -----------    ---------   ---------   -----------   ------------
STATEMENT OF OPERATIONS DATA:
<S>                                          <C>           <C>         <C>         <C>            <C>       
Revenues                                     $      --     $      --   $      --   $        --    $       --
Operating expenses:
   Research and development                     338,626      499,366     698,303     2,206,900      3,743,195
   General and administrative                   137,325      228,114     195,663       339,948        901,050
                                              ---------    ---------   ---------   -----------    -----------
     Total operating expenses                   475,951      727,480     893,966     2,546,848      4,644,245
                                              ---------    ---------   ---------   -----------    -----------
Loss from operations                           (475,951)    (727,480)   (893,966)   (2,546,848)    (4,644,245)
Interest income (expense)                         9,037       22,369      17,100      (140,987)       (92,481)
                                              ---------   ----------   ---------   -----------    ----------- 
Net loss                                      $(466,914)  $ (705,111)  $(876,866)  $(2,687,835)   $(4,736,726)
                                              =========   ==========   =========   ===========    =========== 
Pro forma net loss per share(1)                                                    $     (0.56)
                                                                                   =========== 
Shares used to compute pro forma net loss
  per share(1)                                                                       4,785,863
                                                                                   ===========
</TABLE>




<TABLE>
<CAPTION>
                                                                                DECEMBER 31,
                                                             --------------------------------------------------
                                                               1993         1994          1995          1996
                                                             --------    ----------    -----------   ----------
<S>                                                         <C>         <C>            <C>           <C>
Balance Sheet Data:
Working capital                                             $ 440,793   $   537,814   $    254,539   $ 1,317,447
Total assets                                                  505,294       602,362        336,371     1,563,392
Note payable to principal stockholder                              --            --             --     3,000,000
Deficit accumulated during the development stage             (466,914)   (1,172,025)    (2,048,891)   (4,736,726)
Total stockholders' equity (deficit)                          452,700       550,108        273,275    (1,852,170)
</TABLE>


- ----------
(1) See  Note 1 of Notes  to  Financial  Statements  for an  explanation  of the
    determination of the number of shares used to compute pro forma net loss per
    share.


                                       21




                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

    This Prospectus contains  forward-looking  statements.  Such forward-looking
statements include, but are not limited to, the Company's expectations regarding
its future  financial  condition and  operating  results,  product  development,
business and growth strategy, market conditions and competitive environment. The
Company's actual results could differ materially from those anticipated in these
forward-looking  statements as a result of certain factors,  including those set
forth under "Risk Factors" and elsewhere in this Prospectus.

OVERVIEW

    The Company was  incorporated in December 1992 and expects to  reincorporate
in  Delaware  prior to  consummation  of this  Offering.  The  Company is in the
development  stage and is subject to all business  risks  associated  with a new
enterprise,  including uncertainties regarding product development,  constraints
on the Company's financial and personnel  resources,  and dependence on and need
for third  party  relationships.  At  December  31,  1996,  the  Company  had an
accumulated deficit of approximately $4.7 million.  The Company anticipates that
it will continue to incur substantial  additional  operating losses for at least
the next  several  years  and  expects  cumulative  losses  to  increase  as the
Company's  research and development  efforts  expand.  The Company has a limited
history of operations  consisting  primarily of  development of its products and
sponsorship of research and clinical  trials.  The Company has not generated any
revenue to date,  whether from product sales,  license fees or research funding,
and there can be no  assurance  as to when or whether it will be able to develop
sources of revenue or that its operations will become profitable,  even if it is
able to commercialize any products.

RESULTS OF OPERATIONS

 YEARS ENDED DECEMBER 31, 1994, 1995 AND 1996

    Research  and  Development  Expenses.   Research  and  development  expenses
increased  from $499,000 in 1994 to $698,000 in 1995 to $2,207,000 in 1996.  The
increase  in 1995  over  1994  was  primarily  associated  with  production  and
formulation  activities  supporting  the  Company's  first  limited  Phase  I/II
clinical trial of OncoVax-P. The increase in 1995 was also the result of initial
production and  formulation  of  OncoVax-CL.  The increase in 1996 expenses over
1995 is attributed  to further  production of OncoVax-P in support of additional
limited Phase I/II clinical trials and support for a limited Phase I/II clinical
trial of  OncoVax-CL  which is scheduled to begin in the first  quarter of 1997.
Research and development  expenses in 1996 also include $830,000 associated with
acquiring rights to certain in-process research and development (ACT and JT3002)
from  Novartis.  This  technology  is  currently  being  utilized in a Phase III
clinical trial for patients with osteogenic sarcoma. Management anticipates that
research and  development  expenses  will increase  significantly  over the next
several years in support of ongoing and planned  clinical  trials in each of the
Company's principal product development programs.

    General  and  Administrative  Expenses.  The  Company  incurred  general and
administrative  expenses of  $228,000,  $196,000 and $340,000 in the years ended
1994,  1995 and 1996,  respectively.  General and  administrative  expenses were
substantially the same in 1994 and 1995,  except for a non-recurring  settlement
of a finder's fee  agreement  in the amount of $30,000 in 1994.  The increase of
$144,000 in 1996  compared  with 1995 is due  primarily to salary  increases and
increases in legal expenses related to the acquisition of technology and general
corporate  matters.   The  Company  expects  to  incur  increasing  general  and
administrative  expenses  in 1997 as a result  of adding  personnel,  increasing
office rental costs and other costs related to supporting  increases in staffing
and operating as a public company.

    Interest Income (Expense). Interest income in 1996 was offset by an increase
in interest  expense  from $3,000 in 1995 to $203,000 in 1996 as a result of the
$3 million debt financing with the Company's principal shareholder.

                                       22






LIQUIDITY AND CAPITAL RESOURCES

    The Company has funded its operations to date primarily  through the sale of
equity  securities  and  borrowings  from  its  principal  stockholder.  Through
December 31, 1996,  the Company has raised  approximately  $2.4 million from the
sale of equity  securities and $3.0 million  through the  stockholder  loan. See
"Certain  Transactions."  At December  31,  1996,  the Company had cash and cash
equivalents of $1.4 million and an outstanding principal balance of $3.0 million
under the stockholder  loan.  Borrowings  under the stockholder loan bear simple
interest  at a rate of 10% per annum.  The  principal  and  accrued  interest is
payable on May 6, 1999.  Cash used in operating  activities  totalled  $698,000,
$871,000  and  $1,900,000  in 1994,  1995 and 1996,  respectively.  Cash used to
acquire capital equipment has not been  significant.  The Company intends to use
approximately  $1.1 million of the net proceeds of the Offering to establish and
equip a small  laboratory  facility  to support  its  research  and  development
activities. See "Use of Proceeds."

    The Company's  operations to date have consumed  substantial  and increasing
amounts of cash. The negative cash flow from  operations is expected to continue
and  to  accelerate  in  the  foreseeable   future.  The  Company  will  require
substantial  funds of its own, or from third  parties,  to conduct  research and
development,  preclinical  and  clinical  testing  and to  manufacture  (or have
manufactured) and market (or have marketed) its product candidates.  The Company
estimates  that its current cash  resources and the net proceeds of the Offering
will be sufficient to meet its operating and capital  requirements  for at least
12 months  following the closing of the Offering.  However,  the Company's  cash
requirements  may vary  materially  from those now planned because of results of
research  and  development,   results  of  preclinical  and  clinical   testing,
relationships  with  possible  strategic  partners,  changes  in the  focus  and
direction of the Company's  research and development  programs,  competitive and
technological  advances,  the FDA regulatory process and other factors.  The net
proceeds  of this  Offering  are  not  expected  to be  sufficient  to fund  the
Company's  operations  through  the  commercialization  of one or more  products
yielding sufficient revenues to support the Company's operations; therefore, the
Company is likely to need to raise  additional  funds.  The  Company may seek to
satisfy its future funding  requirements  through public or private offerings of
securities,  with collaborative or other arrangements with major  pharmaceutical
companies or from other sources.  Additional financing may not be available when
needed or on terms  acceptable  to the  Company.  If adequate  financing  is not
available, the Company may not be able to continue as a going concern, or may be
required  to  delay,  scale  back  or  eliminate  certain  of its  research  and
development  programs,  to relinquish  rights to certain of its  technologies or
product candidates, to forego desired opportunities, or to license third parties
to commercialize  products or technologies that the Company would otherwise seek
to develop  itself.  To the  extent the  Company  raises  additional  capital by
issuing equity securities,  ownership dilution to the investors in this Offering
will result.

INCOME TAXES

    The Company has elected to be taxed as a C corporation  since its inception.
At December 31, 1996, the Company had federal net operating  loss  carryforwards
of approximately $3.7 million and research and development credit  carryforwards
of approximately  $40,000.  The net operating loss and credit carryforwards will
expire  at  various  dates  beginning  in  2008,  if not  utilized.  There is no
guarantee that the Company will have future  profitable  operations  which would
allow the use of the tax benefits. In addition, utilization of the net operating
losses and credits may be subject to a substantial  annual limitation due to the
"change of  ownership"  provisions  of the  Internal  Revenue  Code.  The annual
limitation may result in the expiration of the carryforwards before utilization.

                                       23







                                    BUSINESS

    This Prospectus contains  forward-looking  statements.  Such forward-looking
statements include, but are not limited to, the Company's expectations regarding
its future  financial  condition and  operating  results,  product  development,
business and growth strategy, market conditions and competitive environment. The
Company's actual results could differ materially from those anticipated in these
forward-looking  statements as a result of certain factors,  including those set
forth under "Risk Factors" and elsewhere in this Prospectus.

THE COMPANY

    Jenner Technologies,  Inc. ("Jenner" or the "Company"),  a development stage
company, is engaged in the development of immunotherapies to treat patients with
cancer and certain side effects  related to  chemotherapy.  The Company has four
product candidates under development, two of which are in clinical trials. Three
of the  Company's  product  candidates  are  designed  to delay or  prevent  the
recurrence  of cancer by  stimulating  the body's  own  immune  system to attack
microscopic disease remaining after a patient has undergone traditional therapy.
The  Company's  product  candidates  consist of macrophage  activators  (ACT and
JT3002)  and  therapeutic  vaccines  (OncoVax-P  and  OncoVax-CL).  The  Company
acquired the technology related to ACT and JT3002 through an exclusive worldwide
license with  Novartis AG (the company  resulting  from the merger of Ciba-Geigy
Limited and Sandoz,  Ltd.) ("Novartis").  In addition,  the Company acquired the
rights to produce  the  antigen  related to  OncoVax-P  through a  non-exclusive
license with Research Corporation Technologies,  Inc. and the antigen related to
OncoVax-CL through an exclusive worldwide license with Eli Lilly & Company.

    ACT is in a nationwide  Phase III  clinical  trial as a therapy for patients
with  osteogenic  sarcoma  (bone  cancer).  The  study  calls for a total of 645
patients  to be  treated  under the  protocol  and,  as of  December  31,  1996,
approximately  540 patients had entered the study. ACT utilizes a small molecule
that has the capacity to activate  macrophages,  which are scavenger  cells that
are part of the immune system.  Once activated,  macrophages acquire the ability
to seek out and  destroy  tumor  cells.  ACT  utilizes a  proprietary  liposomal
formulation  to  deliver  its  active  ingredients  (liposomes  are  spheres  of
subcellular size composed primarily of fat molecules).  JT3002 is in preclinical
evaluation as a therapy for mucositis (damage to the gastrointestinal  mucosa or
lining of the gut), a side effect  commonly  associated with  chemotherapy.  The
Company intends to file an Investigational New Drug application ("IND") with the
United States Food and Drug Administration ("FDA") in late 1997 or early 1998 to
commence  Phase I  clinical  trials of  JT3002,  subject  to the  results of the
preclinical evaluation.

    OncoVax-P is in limited Phase I/II clinical trials in patients with prostate
cancer.  The Company intends to commence a limited Phase I/II clinical trial for
OncoVax-CL in patients with colorectal  cancer in the first quarter of 1997. The
Company's Phase I/II clinical trials are conducted in a small number of patients
(5-6) to gain  preliminary  information  regarding  safety  of the  vaccine  and
ability to generate an immune response.  OncoVax-P and OncoVax-CL each include a
genetically  engineered  version of a tumor associated  antigen which represents
the "identity  tag" of the cancer cell combined with an adjuvant  which enhances
the body's immune  response.  The antigen and adjuvant are packaged in liposomes
which are taken up by  antigen  presenting  cells.  The  Company  believes  this
approach  will  induce  a more  robust  relevant  immune  response  than  if the
liposomal  delivery system is not used.  Based on preclinical  data, the Company
believes that OncoVax-CL has the potential for application in cancer indications
other than colorectal cancer, such as lung, pancreatic and ovarian cancer.

    In an effort to leverage the Company's resources and better manage the risks
and costs inherent in scientific  research and new product  development,  Jenner
has  followed a business  strategy  of (i)  in-licensing  promising  proprietary
technologies for which substantial preclinical and/or clinical studies have been
undertaken,  (ii) focusing on human clinical trials to gain relevant information
rather  than   developing   animal   models,   and  (iii)   engaging   qualified
subcontractors  to perform  research  and  development  functions.  Through this
business  strategy,  the Company has expended only approximately $4.0 million in
cash through  December 31, 1996 to develop its current  product  candidates  and
believes it has extended its research efforts to a larger number of applications
than would otherwise be the case given its limited resources.

                                       24






    The Company believes that its business strategy and management  capabilities
may enable it to shorten the time frame for  commercializing  its products.  The
Company intends to pursue its business  strategy further by seeking to establish
strategic alliances with  pharmaceutical  companies and other corporate partners
in connection  with  development,  marketing and  distribution  of the Company's
product candidates.

 CANCER INCIDENCE AND TREATMENT

    Cancer is the second leading cause of death in the United  States.  Based on
cancer incidence data collected by the National Cancer Institute's Surveillance,
Epidemiology  and End Results (SEER) program and U.S.  population data collected
by the Bureau of the Census, it is estimated that approximately 1.38 million new
cancer cases and 560,000 deaths will occur in the United States in 1997.

    The current  treatment  regimens for cancer consist  primarily of surgery to
remove  malignant  tumors,  radiation  therapy to treat tumors or  post-surgical
residual tumor cells in a localized area in the body, and  chemotherapy to treat
cancer that has spread systemically. Depending upon the type and severity of the
cancerous tumor, these therapies can be used individually or in combination with
each other.

    Surgery  is the most  effective  treatment  for  cancer and the one with the
greatest  potential  cure  of  solid  tumors.   However,   despite   significant
improvements  in early  diagnosis and in surgical  techniques,  many  surgically
treated  patients  experience  recurrence of cancer.  The chances for recurrence
depend  on the type of  cancer,  how  early it is  detected,  and if  metastases
(distant spread of the tumor) occurred prior to surgical  removal of the primary
tumor.  Most deaths  from cancer are due to  metastases  that are  resistant  to
conventional therapies.

    Radiation therapy involves  subjecting tumor cells to radiation which causes
the cells to die or  multiply  more  slowly.  Because  certain  tumor  cells are
rapidly dividing,  they are often more sensitive to radiation than normal cells,
allowing  radiation therapy to kill these cells with a resultant  improvement in
the patient's  condition.  However,  because of the overall  damaging  nature of
radiation,  it is generally  limited in use to small specific sites that are not
near sensitive organs or structures.  In addition, the toxicity of the radiation
to normal cells limits the amount of radiation that can be  administered,  which
in turn limits the effectiveness of radiation therapy in killing cancer cells.

    Chemotherapy  involves  the use of  drugs  that  slow  down or kill  rapidly
dividing  cells.  Although many cancer cells fall into this category,  there are
also normal cells in the body which divide  rapidly.  These include cells of the
gastrointestinal mucosa and bone marrow. Since chemotherapy affects all of these
cell populations,  it produces significant side effects,  including mucositis, a
serious  condition  that can cause  gastrointestinal  ulcerations  and diarrhea.
Thus,  administration of chemotherapy  carries with it the hazard of significant
complications,  and, for solid tumors, it generally does not achieve cure of the
disease.  For prostate cancer,  chemotherapy has minimal efficacy,  but hormonal
therapy may delay tumor progression for a period of time.

    Current  treatments  for  metastatic  cancers  are not very  effective.  The
Company believes that recent technological advances and increased  understanding
of the immune  system  make  possible  cancer  therapies  that will  activate or
stimulate the immune system offering the potential for new, effective treatment.

JENNER'S PRODUCT CANDIDATES AND CLINICAL TRIALS

    The Company has two primary areas of product  focus:  macrophage  activators
and therapeutic vaccines. Three of the Company's product candidates are designed
to delay or  prevent  the  recurrence  of cancer by  stimulating  the body's own
immune  system to  attack  microscopic  disease  remaining  after a patient  has
undergone traditional therapy. The Company's other product candidate is designed
to  ameliorate  certain  side  effects  of  chemotherapy.  There  have been many
scientific  advances  in recent  years that have  enabled  the Company to pursue
development of its macrophage  activators and  therapeutic  vaccines.  Hybridoma
technology has permitted the  development of monoclonal  antibodies  that can be
used to identify  and  characterize  tumor  associated  antigens  important  for
vaccine  development  and to  study  their  tissue  distribution.  In  addition,
advances  in genetic  engineering  have 

                                       25





enabled  cost-effective  production  of  specific  antigens  once they have been
identified. Finally, advances in biology have provided a better understanding of
the immune response and methods to manipulate it for the clinical benefit of the
patient.

    The  table  below  sets  forth  the  Company's   principal   products  under
development,  the primary indications for these products and the clinical status
for each product.


    PRODUCT CANDIDATE               INDICATION               CLINICAL STATUS
    -----------------               ----------               ---------------
     ACT                        Osteogenic Sarcoma              Phase III

     OncoVax-P                   Prostate Cancer           Limited Phase I/II*

     OncoVax-CL                 Colorectal Cancer          Limited Phase I/II*
                                                           Patient Enrollment

     JT3002                         Mucositis            Preclinical Evaluation


- ----------
* Jenner's limited Phase I/II clinical trials are conducted in a small number of
  patients (5-6) to gain preliminary information regarding safety of the vaccine
  and ability to generate an immune response.


ACT

    ACT is  currently  in a pivotal  Phase III  randomized  trial as therapy for
patients  with  osteogenic  sarcoma.  The pivotal  Phase III  clinical  trial is
sponsored by the National Cancer  Institute of the U.S.  National  Institutes of
Health and is being  conducted  nationwide by the Children's  Cancer Study Group
and the  Pediatric  Oncology  Group.  These groups  include the majority of U.S.
centers  treating  patients with  osteogenic  sarcoma.  The Overall Chair of the
study is Paul Meyers, M.D. of Memorial  Sloan-Kettering Cancer Center. The Phase
III study has been  designed to evaluate the  efficacy of ACT when  administered
for nine  months  with  chemotherapy  following  surgical  excision  of  primary
osteogenic  sarcoma.  End  points  of the study are  disease-free  survival  and
survival.  The study calls for a total of 645  patients to be treated  under the
protocol  and, as of December 31, 1996,  approximately  540 patients had entered
the study. It is estimated that there will be  approximately  2,500 new cases of
osteogenic  sarcoma in the  United  States in 1997.  The  Company  acquired  the
technology related to ACT through an exclusive worldwide license with Novartis.

    The Phase III pivotal  trial  design is based on the  results  obtained in a
Phase II trial conducted at University of Texas, M.D. Anderson Cancer Center, in
children and adults with pulmonary  metastasis of osteogenic  sarcoma.  Patients
who entered the Phase II trial had histologically proven osteogenic sarcoma with
pulmonary  metastases that had developed  during  adjuvant  chemotherapy or that
were present at diagnosis, persisted despite chemotherapy and recurred following
surgical excision.  Patients were rendered  clinically  disease-free by surgery.
ACT was  administered  postoperatively  to two  separate  groups of patients for
three months or six months,  respectively.  For  comparison,  medical records of
patients  previously  treated  at the  same  institution  were  reviewed  and 21
patients  identified  whose disease status was similar but who were treated with
chemotherapy  rather than ACT.  The median time to relapse was 4.5 months in the
21  patients  treated  with  chemotherapy,  6.8  months in the 12  patients  who
received  three  months of ACT  therapy,  and 9.0 months in the 16 patients  who
received six months of ACT therapy.  The increase in median time to relapse from
4.5 months to 9 months represents a statistically  significant  increase.  These
data  suggested  that ACT is an active  agent in  osteogenic  sarcoma,  that six
months  of  ACT  is  superior  to  three  months,  and  that  a  more  prolonged
administration  of the drug (nine to 12 months)  could benefit more patients and
could result in even longer disease-free intervals.

    ACT  is  a  liposomal  formulation  of  MTP-PE,  which  is  a  conjugate  of
muramyl-tripeptide (MTP) and dipalmitoylphosphotidylethanolamine  (PE). MTP is a
synthetic  derivative of muramyl dipeptide,  a naturally  occurring component of
bacterial  cell  walls  that has the  capacity  to  activate  macrophages.

                                       26




Once activated,  macrophages acquire the ability to distinguish tumor cells from
normal cells and will kill only the tumor cells. Both the liposomal  formulation
and the basic molecule of MTP-PE are proprietary to the Company.

    Based on the  results  of the Phase II trial  and  earlier  preclinical  and
clinical  trials,  the  Company  believes  that  ACT  may  be  effective  as  an
immunotherapeutic  for other types of cancer as well. The data suggests that ACT
is most effective when  administered  at a time when the tumor burden is minimal
but the patient is at high risk of recurrence  because of tiny  metastases  left
behind following standard treatment.  The Company is in the process of designing
new Phase II  clinical  trials and  defining  patient  populations  to study the
efficacy  of ACT in the  adjuvant  setting  for  cancers  other than  osteogenic
sarcoma.  Substantial  additional  research and development will be necessary in
this regard,  and there can be no  assurance  that ACT will be shown in clinical
trials to be  effective  for the  treatment of  osteogenic  sarcoma or any other
cancer indication.  See "Risk Factors -- No Assurance of Product  Development or
Commercialization; Uncertainties Related to Clinical Trials."

CANCER VACCINES

    The Company is  developing  OncoVax-P  to treat  prostate  cancer.  Prostate
cancer is the most common malignancy among men in the United States,  accounting
for an estimated  43% of all cancer  malignancies  in men. It is estimated  that
there will be 334,500 new cases of prostate  cancer in the United States in 1997
and over 40,000 deaths.  OncoVax-P  includes a prostate  specific  antigen (PSA)
licensed  from  Research  Technologies  Corporation  combined  with an  adjuvant
formulated into liposomes. In the third quarter of 1995, the Company initiated a
limited  Phase I/II  clinical  trial for  OncoVax-P in which six  patients  with
advanced  metastatic  prostate  cancer  who  had  all  failed  standard  therapy
(including hormonal therapy) were treated with OncoVax-P. Moreover, although all
patients had advanced disease, two of the patients mounted an immune response to
the PSA antigen in the vaccine.

    Based on the foregoing  results,  the Company has initiated three additional
limited Phase I/II clinical trials using OncoVax-P,  each of which involves five
or six  evaluable  patients.  These new  trials are  designed  to  determine  an
effective  regimen  for  inducing a strong  immune  response  and will study the
effect of (i) administering OncoVax-P intravenously rather than intramuscularly,
(ii) administering  OncoVax-P in combination with granulocyte  macrophage-colony
stimulating  factor  (GM-CSF),  a cytokine  that has been shown to enhance white
blood  cell count and  immune  response,  and (iii)  pretreating  patients  with
cyclophosphamide, a chemotherapy drug, and then treating them with a combination
of OncoVax-P and bacillus Calmette-Guerin (BCG), a bacterium-based  adjuvant. In
a fourth limited Phase I/II trial planned to commence  later in 1997,  OncoVax-P
will be evaluated in a proprietary emulsion formulation. The clinical trials are
sponsored  by the Company and are  conducted by David  Harris,  M.D. at Lankenau
Hospital near Philadelphia, Pennsylvania.

    The Company is developing OncoVax-CL to treat colorectal cancer.  Colorectal
cancer is  currently  the third  most  commonly  occurring  cancer in the United
States.  It is  estimated  that there will be  131,000  new cases of  colorectal
cancer in the United States in 1997 and 55,000 deaths.  Approximately 50% of all
persons  diagnosed  with  colorectal  cancer die within five years of diagnosis.
OncoVax-CL consists of a liposomal formulation of an antigen (KSA) licensed from
Eli Lilly & Company and an adjuvant. The Company has submitted an IND to the FDA
for  OncoVax-CL  and expects to  commence a limited  Phase I/II  clinical  trial
involving  six  evaluable  patients  in the first  quarter of 1997.  The Company
sponsored  clinical trial will be conducted by Albert F.  LoBuglio,  M.D. at the
University of Alabama.  Based on  preclinical  data,  the Company  believes that
OncoVax-CL may have the potential for  application in cancer  indications  other
than colorectal cancer, such as lung, pancreatic and ovarian cancer.

    Each of the Company's  cancer  vaccines  includes a  genetically  engineered
version of a tumor associated antigen combined with an adjuvant. An antigen is a
substance  which  induces an immune  response  within the body. An adjuvant is a
substance that is administered with an antigen to enhance the immune response to
the antigen.  The antigen and adjuvant are packaged in liposomes.  The liposomal
formulation  targets  the  antigen-presenting  cells of the immune  system.  The
immune  response  includes  direct  killing of the tumor  cells by the  T-cells,
production of antibodies which activate the patient's

                                       27





defense  mechanisms  to kill the tumor cells,  and the  generation  of cytokines
which kill tumor cells directly and indirectly  through activating the patient's
defenses.  Research  and  development  and  clinical  testing  of the  Company's
vaccines are at an early stage and there can be no assurance  that such vaccines
will be shown in clinical  trials to be safe or effective in treating any cancer
indication.  See  "Risk  Factors  -- No  Assurance  of  Product  Development  or
Commercialization; Uncertainties Related to Clinical Trials."

JT3002

    JT3002 is in preclinical  evaluation for the therapy of mucositis,  a common
side  effect  of  chemotherapy.   Mucositis  may  cause  severe,  disabling  and
potentially  life  threatening side effects in patients and may lead to the need
for extended hospitalization.  For some chemotherapy regimens,  mucositis is the
major dose limiting side effect.  There is currently no effective  treatment for
mucositis.  Preclinical studies are being conducted by Isaiah J. Fidler, D.V.M.,
Ph.D., a director of the Company and a member of its Scientific  Advisory Board,
at  the  University  of  Texas,  M.D.  Anderson  Cancer  Center.   See  "Certain
Transactions."  The Company  intends to file an IND with the FDA in late 1997 or
early 1998 to commence Phase I clinical trials of JT3002, subject to the results
of the preclinical  evaluation.  The Company acquired the technology  related to
JT3002  through an  exclusive  worldwide  license  with  Novartis.  Research and
development  of JT3002 is at a very  early  stage and there can be no  assurance
that  JT3002 will be shown in  preclinical  studies or in  clinical  trials,  if
undertaken,  to be safe or effective in treating mucositis. See "Risk Factors --
No Assurance of Product Development or Commercialization;  Uncertainties Related
to Clinical Trials."

BUSINESS STRATEGY

    Scientific  research  and the  development  of  therapeutic  products  is an
uncertain  endeavor  in which many  projects  fail,  even though they may appear
promising  at  an  earlier  stage.  Moreover,   the  infrastructure,   including
facilities,   equipment  and  qualified  personnel,   needed  for  research  and
development  in  biotechnology  is very  costly.  As a  result,  in an effort to
leverage the Company's  resources and better manage the risks and costs inherent
in  scientific  research  and new  product  development,  Jenner has  followed a
business  strategy of (i) in-licensing  promising  proprietary  technologies for
which substantial preclinical and/or clinical studies have been undertaken, (ii)
focusing on human  clinical  trials to gain relevant  information  as opposed to
developing animal models, and (iii) engaging qualified subcontractors to perform
research and development  functions.  Where possible,  it has been the Company's
policy to second and sometimes  third source those  subcontracted  services that
are vital to the Company's product  development.  Through its business strategy,
the  Company  has  expended  only  approximately  $4.0  million in cash  through
December 31, 1996 to develop its current product  candidates and believes it has
extended  its research  efforts to a larger  number of  applications  than would
otherwise be the case given its limited resources.

    The Company's  management has  considerable  experience in  identifying  and
licensing  promising  technologies,   retaining  and  managing  the  efforts  of
subcontractors,  and designing,  supervising and monitoring clinical trials. The
Company's  Chief  Executive   Officer  has  extensive   experience  in  business
management and has scientific knowledge complementary to the Company's business.
The Company's  President and Chief Scientific  Officer has worked in the area of
cancer  therapy  for  over  25  years,  and  combines  comprehensive  scientific
knowledge with business experience.  The Company recently hired a Vice President
of Clinical Trials and Product Development,  and believes that his experience in
the  areas  of  clinical  trials  and  product   development   will  be  key  to
commercialization of the Company's product candidates. The Company believes that
the  overlapping  skills  of its  management  has  enabled  them to  communicate
effectively and manage the Company efficiently.  The Company intends to continue
to  recruit  highly  qualified  personnel  with a broad base of  scientific  and
business skills to complement existing management.

    The Company believes that its business strategy and management  capabilities
may enable it to shorten the time frame for commercializing its products. As the
Company's product candidates advance through the regulatory process, the Company
generally intends to establish strategic alliances with pharmaceutical companies
and other corporate partners with large distribution  systems to market and sell
the Company's products worldwide.  In some cases,  however,  where the customers
for a product are easily  identified and  concentrated,  the Company  intends to
market and distribute the product through a direct sales force.

                                       28






    Although  the Company  believes  that it has  benefitted  from its  business
strategy,  the strategy creates risks to the Company by placing critical aspects
of the Company's business in the hands of third parties whom the Company may not
be able to  control  as  effectively  as its own  operations.  Additionally,  in
reliance on these relationships, the Company has not developed its own resources
to the extent these  activities have been contracted to third parties.  If these
third parties do not perform in a timely and  satisfactory  manner,  the Company
may incur  additional  costs and lose time in the conduct of its development and
clinical  programs as it seeks alternate  sources of such products and services,
if  available.  The effect of such costs and delays may have a material  adverse
effect on the Company.

    The Company may seek additional third party  relationships in certain areas,
particularly  in  situations  in which the Company  believes  that the  clinical
testing,  marketing,  manufacturing  and  other  resources  of a  pharmaceutical
company  collaborator will enable the Company to develop particular  products or
geographic  markets which are otherwise  beyond the Company's  resources  and/or
capabilities.  There is no assurance that the Company will be able to obtain any
such  collaboration,  or any other research and development,  manufacturing,  or
clinical  trial  agreement.  The inability of the Company to obtain and maintain
satisfactory relationships with third parties may have a material adverse effect
on the Company.

LICENSES

    Novartis  Corporation.  The Company is a party to a license  agreement  with
Novartis  which was  entered  into in April 1996.  Under the license  agreement,
Novartis  granted to Jenner an exclusive  worldwide  license under its rights in
certain  U.S.  and foreign  patent  applications  and  patents  and  proprietary
know-how to  manufacture  and  commercialize  products  incorporating  liposomal
MTP-PE  (ACT)  and CGP  40774  (JT3002)  and  their  analogues  in all human and
veterinary  therapeutic  and  prophylactic  uses,  excluding  use  as a  vaccine
adjuvant and, with respect to JT3002,  excluding use for the treatment of asthma
and other allergic  diseases which materially  affect lung function.  Jenner may
grant and authorize  sub-licenses  under its license.  In consideration  for the
license,  the  Company  has paid to  Novartis  an  up-front  license  fee and is
obligated to pay running  royalties  based on a  percentage  of the net sales of
licensed  products sold by the Company or its sublicensees,  annual  maintenance
fees and one-time  milestone  payments for the first products  incorporating ACT
and JT3002, respectively, upon the completion of a Phase III clinical trial, the
filing of a PLA,  and FDA approval of such PLA.  The  obligation  to pay running
royalties begins upon the first commercial sale of a particular licensed product
and  terminates  15 years  later.  Jenner has an  obligation  to use  reasonable
efforts to diligently develop and commercialize the patent rights licensed under
the agreement  and to obtain such  approvals as may be necessary for the sale of
the licensed  products in the United States and such other worldwide  markets as
the Company  elects to  commercialize  the  licensed  products.  If the Company,
either  itself  or  through  a  sublicensee  or a  distributor,  elects  not  to
commercialize a licensed product in any particular country,  then the Company is
obligated to negotiate a sublicense  with Novartis in such country on reasonable
terms  customary in the industry.  If the Company  elects to  commercialize  any
licensed product for veterinary uses through a sublicensee,  Novartis shall have
a right of first refusal to acquire an exclusive, worldwide sublicense to market
such licensed  product for  veterinary  purposes on agreed terms  reasonable and
customary  in the  industry.  The  license  agreement  continues  in effect on a
country-by-country  and licensed  product-by-licensed  product basis until there
are no remaining  royalty  payment  obligations in a country,  at which time the
license shall expire in its entirety in such country. Upon such expiration,  the
Company shall have a non-exclusive, irrevocable, fully paid-up right and license
to use and exploit the  proprietary  know-how.  Either party may  terminate  the
license agreement in the event of a material breach by the other party.

    Eli Lilly & Company.  The Company entered into a license  agreement with Eli
Lilly & Company ("Eli  Lilly") in June 1994.  Under the license  agreement,  Eli
Lilly has granted to Jenner an exclusive  worldwide  license under a U.S. patent
(and all additional patents issuing therefrom and corresponding  foreign patents
issued in connection  therewith) to manufacture and commercialize  products that
contain the KSA antigen (the antigen  associated  with  OncoVax-CL).  Jenner may
grant and authorize sub-licenses under its license. Except as expressly provided
in the agreement,  Eli Lilly is not obligated 

                                       29





under the  license  grant to provide the  Company  any  know-how  related to the
patent rights.  In consideration  for the license grant,  Jenner has paid to Eli
Lilly an up-front  license fee and is obligated to pay certain  patent  issuance
fees and to make certain  milestone  payments upon the first  anniversary of the
initiation of Phase III clinical trials of the first product  incorporating  the
KSA antigen  (regardless  of the outcome of the trial) and upon FDA  approval to
market the first such  product.  In  addition,  the Company is  obligated to pay
running  royalties to Eli Lilly based on the net sales of licensed products sold
by  the  Company  or  any  sublicensee.  Royalties  are  due  and  payable  on a
country-by-country  basis until the  expiration  of the patent  covering the KSA
antigen in such country.  Jenner has an obligation to use reasonable  efforts to
develop,  gain regulatory approval and market at least one product using the KSA
antigen.  The license agreement  continues in effect until the expiration of the
last licensed  patent.  Either party may terminate the license  agreement in the
event of a material breach by the other party.

    Research  Corporation  Technologies,  Inc. In June 1994, the Company entered
into a license agreement with Research Corporation  Technologies,  Inc. ("RCT"),
an independent technology management company.  Under the license agreement,  RCT
granted to Jenner a  non-exclusive  license under its rights in certain U.S. and
Canadian patents to manufacture and commercialize  products that contain the PSA
antigen (the antigen  associated with  OncoVax-P) as a prophylactic  vaccine for
prostate  cancer and/or a therapeutic  vaccine for prostate cancer in the United
States and Canada. Jenner may grant to up to three third party sublicenses under
its  license.  The  Company  has the option to extend the license to include the
territory  of Japan if  certain  pending  patent  applications  filed by RCT are
issued in Japan. In consideration for the license grant, the Company has paid to
RCT an up-front  license fee and is obligated to pay running  royalties based on
the net sales of licensed  products sold by the Company or any sublicensee.  The
royalty  obligation  begins with the first commercial sale of a licensed product
and  terminates  upon  termination  of  the  license  agreement.  Jenner  has an
obligation  to  exercise  diligence  consistent  with  its  reasonable  business
judgment  in  developing,   testing,   manufacturing   and  marketing   products
incorporating the PSA antigen.  The license agreement  continues in effect until
the  expiration  of the last  licensed  patent.  RCT may  terminate  the license
agreement in the event of a material breach by Jenner.

    Walter  Reed  Army  Institute  of  Research.  The  Company  entered  into  a
Cooperative  Research and Development  Agreement  ("CRADA") with the Walter Reed
Army  Institute of Research  ("WRAIR")  in October  1993.  Under the CRADA,  the
Company is  sponsoring  research to develop and optimize  liposomal and emulsion
formulations of the Company's  cancer vaccines.  Under a separate  non-exclusive
worldwide  license  agreement with WRAIR entered into in March 1996, the Company
also  licensed a certain  patent  application  related to a special  process for
making the liposomes  necessary for the  formulation of the Company's  vaccines.
The CRADA provides that  inventions  developed  solely by one party are owned by
that party and inventions developed jointly are owned by both parties;  provided
however that Jenner is obligated to provide the U.S. government a non-exclusive,
fully  paid-up,  worldwide  license  under any patents  covering  any  invention
developed  under the CRADA;  and  provided  further that Jenner has an option to
acquire an exclusive  license under any patent covering any invention  developed
under  the  CRADA in which  WRAIR  (on  behalf  of the U.S.  government)  has an
interest  (subject to the  reservation of a nonexclusive,  irrevocable,  paid-up
license to practice and have  practiced the subject  inventions on behalf of the
U.S.  government).  If Jenner elects to exercise  such option,  then it would be
obligated to make certain  milestone  payments and royalty payments based on net
sales of products covered by the licensed patents. The CRADA continues in effect
until  December 15, 1997,  although  either party may  terminate  the  agreement
earlier upon 30 days prior written notice.  The license agreement  requires that
the Company make certain  milestone  payments  upon the  conclusion  of Phase I,
Phase II and  Phase  III  clinical  trials of  products  manufactured  using the
licensed  liposome  formulation  process and certain  royalty  payments to WRAIR
based on the net  sales of such  products.  The  term of the  license  agreement
extends to the  expiration  of the last to expire of the  patents  covering  the
technology.

MARKETING AND DISTRIBUTION

    The Company currently has no marketing and sales resources or personnel.  As
the Company's product  candidates  advance through the regulatory  process,  the
Company generally intends to establish  strategic  alliances with pharmaceutical
companies and other corporate partners with large distribution systems to market
and sell the Company's products worldwide.  In some cases, the Company may grant

                                       30






marketing  and  distribution  rights in exchange  for  payment by the  strategic
partner  of the costs and  expenses  related  to the  Phase III  clinical  trial
relating to the particular product.  With respect to ACT, the Company intends to
establish  a direct  sales force to market such  product  for the  treatment  of
osteogenic  sarcoma in the United  States.  The Company  believes  that a direct
sales force may be effective for this indication  because most of the physicians
specializing  in this area are located at a small number of well-known  clinical
institutions,  most of which are  participating in the Phase III clinical trials
for ACT.

MANUFACTURING AND SUPPLY

    The Company  does not have and does not intend to acquire or  establish  its
own dedicated manufacturing  facilities in the foreseeable future. The Company's
manufacturing   strategy   is  to   develop   relationships   with   established
pharmaceutical manufacturers for production of all of its product candidates and
liposomal  formulations.  At the present time, the Company has  arrangements  in
place for manufacturing  and supply of ACT,  OncoVax-P and OncoVax-CL to support
its current  clinical  trials.  However,  the Company  anticipates  that current
manufacturers of these products will not necessarily  manufacture these products
in  subsequent  clinical  trials,  and will not  manufacture  the  products  for
commercial use should the clinical trials be successful and regulatory  approval
be  obtained.   As  a  result,   the  Company  will  need  to  obtain  alternate
manufacturing sources for its products.  Applicable regulations require that, if
the  manufacturing  source  of  products  such  as  the  Company's  vaccines  or
macrophage  activators  is  changed,  equivalency  must be  demonstrated  before
patients are treated with product from the new  manufacturer.  The demonstration
of such  equivalency may require that  additional  clinical trials be conducted.
There is no assurance that the Company will be able to  demonstrate  equivalency
and the effort to do so may require  significant  expenditures of money and time
which could have a material adverse effect on the Company.

    The  Company is  currently,  and will  continue  to be,  dependent  on third
parties for  manufacturing  clinical  and  commercial  scale  quantities  of its
products.  At the present time, the Company  believes that there are a number of
facilities  with FDA  approval  that have the  capability  of  synthesizing  and
manufacturing  the Company's  product  candidates  and  liposomal  formulations.
However,  the process for  manufacturing  and formulating the Company's  product
candidates  is complex and subject to  uncertainties.  There can be no assurance
that  the  Company  will  be  able  to  maintain  existing  agreements  for  the
manufacturing of clinical quantities of products,  that it will be able to enter
into  additional  agreements  with other  third  parties  for  commercial  scale
manufacturing, or that contract manufacturers will be able to adequately produce
the Company's  products in commercial  quantities  in a  cost-effective  manner.
Interruptions  or  difficulties  in clinical  or  commercial  production  of the
Company's products may require the Company to incur substantial costs to address
the situation, which could have a material adverse effect on the Company.

PATENTS AND PROPRIETARY RIGHTS

    The Company believes that patent and trade secret protection is important to
its business  and that its future  success will depend in part on its ability to
maintain its  technology  licenses,  protect trade  secrets,  obtain patents and
operate without infringing the proprietary rights of others,  both in the United
States and in other countries.  With respect to ACT and JT3002,  there are seven
United States patents and 101 foreign patents which have issued,  and 28 foreign
patents pending, all of which are under an exclusive, worldwide, royalty-bearing
license from Novartis. With respect to OncoVax-P,  there is United States patent
and  one   Canadian   patent,   both  of  which  are   under  a   non-exclusive,
royalty-bearing  license from RCT,  and one United  States  patent  pending with
counterpart filings pending in Australia,  Canada, Europe and Japan owned by the
Company.  With respect to  OncoVax-CL,  there is one United  States  patent with
counterpart   foreign   filings,   all  of  which   are   under  an   exclusive,
royalty-bearing  license from Eli Lilly,  and one United States  patent  pending
with counterpart filings pending in Australia, Canada, Europe and Japan owned by
the  Company.  In  addition,  there  are two  additional  United  States  patent
applications with counterpart  foreign filings  applicable to both OncoVax-P and
OncoVax-CL, one of which is under a non-exclusive,  royalty-bearing license from
WRAIR,  and one of which is  co-owned by the Company and WRAIR (on behalf of the
U.S. Government).

    The  pharmaceutical  and  biotechnology  fields are characterized by a large
number of patent filings,  and a substantial number of patents have already been
issued to other companies. Third parties may have filed applications for or have
been issued patents and may obtain  additional  patents and  proprietary


                                       31




rights related to products or processes  competitive with or similar to those of
the  Company.  The Company  may not be aware of all of the  patents  potentially
adverse to the  Company's  interests  that may have been  issued to  others.  No
assurance can be given that such patents do not exist,  have not been filed,  or
could not be filed or issued,  which  contain  claims  relating to the Company's
technology,  products or processes. If patents have been or are issued to others
containing  preclusive  or  conflicting  claims and such  claims are  ultimately
determined to be valid, the Company may be required to obtain licenses to one or
more of such patents or to develop or obtain alternate technology.  There can be
no  assurance  that the  licenses  that  might  be  required  for the  Company's
processes or products would be available on commercially acceptable terms, or at
all.

    Because  of the  substantial  length  of time and  expense  associated  with
bringing new products to the marketplace  through the development and regulatory
approval process, the biotechnology  industry places considerable  importance on
patent and trade secret protection for new technologies, products and processes.
Since patent  applications  in the United States are maintained in secrecy until
patents issue and since  publication  of discoveries in the scientific or patent
literature  often lag behind actual  discoveries,  the Company cannot be certain
that it (or any  licensor)  was the  first to make  the  inventions  covered  by
pending patent  applications  or that it (or any licensor) was the first to file
patent  applications  for such  inventions.  The patent positions of vaccine and
biotechnology  companies can be highly  uncertain and involve  complex legal and
factual  questions,  and therefore the breadth of claims  allowed in vaccine and
biotechnology patents or their enforceability, cannot be predicted. There can be
no assurance that any patents under pending patent  applications  or any further
patent applications will be issued. Furthermore,  there can be no assurance that
the  scope  of  any  patent  protection  will  exclude  competitors  or  provide
competitive  advantages to the Company,  that any of the Company's  patents that
have issued or may be issued will be held valid if  subsequently  challenged  or
that  others,  including  competitors  or  current  or former  employers  of the
Company's  employees,  advisors  and  consultants,  will not claim  rights in or
ownership to the patents and other proprietary rights held by the Company. There
can be no assurance  that others will not  independently  develop  substantially
equivalent  proprietary  information or otherwise obtain access to the Company's
proprietary  information  or that  others  may not be  issued  patents  that may
require  licensing  and the  payment of  significant  fees or  royalties  by the
Company.  The Company's breach of any existing license  agreement or the failure
to obtain a  license  to  technology  required  to  commercialize  its  products
candidates may have a material adverse effect on the Company.

    The biotechnology  industry has experienced  extensive  litigation regarding
patent and other intellectual  property rights.  Accordingly,  the Company could
incur substantial costs in defending itself in suits that may be brought against
the Company claiming infringement of the patent rights of others or in asserting
the Company's  patent rights in a suit against  another  party.  The Company may
also be required to  participate  in  interference  proceedings  declared by the
United  States Patent and Trademark  Office for the purpose of  determining  the
priority of inventions in connection with the patent applications of the Company
or  other  parties.   Adverse   determinations  in  litigation  or  interference
proceedings  could  require  the  Company  to seek  licenses  (which  may not be
available  on  commercially   reasonable   terms)  or  subject  the  Company  to
significant  liabilities to third parties,  and could  therefore have a material
adverse effect on the Company.  Even if the Company  prevails in an interference
proceeding  or a lawsuit,  substantial  resources of the Company,  including the
time and attention of its officers, will be required.

    The  Company  also  relies  on trade  secrets,  know-how  and  technological
advancement  to maintain  its  competitive  position.  Although the Company uses
confidentiality  agreements and employee  proprietary  information and invention
assignment  agreements  to  protect  its  trade  secrets  and  other  unpatented
know-how,  these  agreements  may be breached by the other party  thereto or may
otherwise be of limited effectiveness or enforceability.

     The  Company  is  aware  of a  company  that has  filed  an  intent  to use
application in the United States Patent and Trademark  Office for the mark "Onco
Vax" relating to  therapeutic  vaccines for  oncological  purposes.  The Company
believes that it has superior  rights to use "OncoVax" based upon its public use
of the mark in  technical  journals  prior to the  effective  filing date of the
intent to use  application.  However,  there can be no assurance in this regard,
and the Company may be required to discontinue using "OncoVax" as a name for its
products.

                                       32





GOVERNMENT REGULATION

    General. Testing, manufacturing,  labeling,  advertising,  promotion, export
and  marketing,  among other things,  of the  Company's  products are subject to
extensive regulation by governmental  authorities in the United States and other
countries.  In the United States,  pharmaceutical  products are regulated by the
FDA under the Federal Food, Drug, and Cosmetic Act and other laws, including, in
the case of biologics,  the Public Health  Service Act. At the present time, the
Company  believes  that  its  immunotherapeutics  that  it may  develop  will be
regulated by the FDA as biologics.

    The steps  required  before a drug or biologic may be approved for marketing
in the United States  generally  includes (i) preclinical  laboratory and animal
testing,  (ii) the submission to the FDA of an IND for human  clinical  testing,
which must become  effective  before human clinical  trials may commence,  (iii)
adequate and  well-controlled  human clinical trials to establish the safety and
efficacy of the product,  (iv) in the case of a biologic,  the submission to the
FDA of a biologic license  application  ("BLA"), or in the alternative a Product
License  Application  ("PLA")  for  the  product  and an  Establishment  License
Application ("ELA") for the facility at which the product is manufactured, or in
the case of a drug, a New Drug  Application  ("NDA"),  (v) FDA review of the BLA
(or PLA/ELA) or NDA, and (vi)  satisfactory  completion of an FDA  inspection of
the  manufacturing  facilities at which the product is made to assess compliance
with cGMPs. The testing and approval process requires  substantial  time, effort
and financial resources, and there can be no assurance that any approval will be
granted on a timely basis, if at all.

    Preclinical studies include laboratory evaluation of the product, as well as
animal studies to assess the potential  safety and efficacy of the product.  The
results of the preclinical studies,  together with manufacturing information and
analytical  data, are submitted to the FDA as part of the IND, which must become
effective before clinical trials may be commenced.  The IND  automatically  will
become  effective 30 days after receipt by the FDA,  unless the FDA, before that
time,  raises  concerns or questions about the trials as outlined in the IND and
places a clinical  hold on the trials.  In such case, an IND sponsor and the FDA
must resolve any outstanding concerns before clinical trials can proceed.

    Clinical trials involve the administration of the investigational product to
healthy  volunteers or patients under the  supervision of a qualified  principal
investigator.  In the case of Jenner's  products,  it is anticipated that trials
will be conducted in patients with cancer,  not healthy subjects.  Each clinical
trial must be reviewed and approved by an independent Institutional Review Board
("IRB") at each  institution at which the study will be conducted.  The IRB will
consider,  among other things, ethical factors, the safety of human subjects and
possible liability of the institution.

    Clinical trials typically are conducted in three sequential  phases, but the
phases may overlap. In Phase I, the initial  introduction of the drug into human
subjects,  the drug is  usually  tested  for safety  (adverse  effects),  dosage
tolerance, absorption, metabolism, distribution, excretion and pharmacodynamics.
While safety  testing in the Phase I trial applies to all of Jenner's  products,
the Company  believes  that the other items may not be applicable in the case of
its vaccine  candidates.  Phase II clinical  trials usually involve studies in a
limited  patient  population  to (i)  evaluate  the  efficacy  of the  drug  for
specific,  targeted  indications,  (ii) determine  dosage  tolerance and optimal
dosage and (iii) identify  possible adverse effects and safety risks.  Phase III
clinical trials further evaluate  clinical  efficacy and test further for safety
within an expanded patient  population.  There can be no assurance that Phase I,
Phase II or Phase III testing will be completed successfully within any specific
time period, if at all, with respect to any of the Company's product candidates.
Furthermore, the FDA may suspend clinical trials at any time on various grounds,
including  a finding  that the  subjects  or  patients  are being  exposed to an
unacceptable health risk.

    Phase IV clinical  trials are conducted  after  approval to gain  additional
experience from the treatment of patients in the intended therapeutic indication
and to document safety and clinical  benefit in the case of drugs approved under
accelerated approval regulations.  If the FDA approves a product while a company
has ongoing clinical trials that were not necessary for approval,  a company may
be able to use the data from  these  clinical  trials to meet all or part of any
Phase IV clinical trial requirement. These clinical trials are often referred to
as "Phase III/IV  post-approval  clinical  trials."  Failure to promptly conduct
Phase IV clinical  trials,  if required,  could result in withdrawal of products
approved under accelerated approval regulations.

                                       33





    The results of the preclinical  studies and clinical  trials,  together with
detailed  information on the  manufacture  and  composition of the product,  are
submitted to the FDA in the form of a BLA or PLA/ELA,  or in the case of a drug,
NDA,  requesting  approval  to market the  product.  Before  approving  a BLA or
PLA/ELA or NDA,  the FDA will  inspect  the  facilities  at which the product is
manufactured and will not approve the product unless the manufacturing  facility
is in compliance with cGMPs. The FDA may delay regulatory approval if applicable
regulatory   criteria  are  not  satisfied,   require   additional   testing  or
information,  and/or require post marketing  testing and surveillance to monitor
safety or efficacy of a product.  There can be no assurance  that any regulatory
submission  submitted by the Company will be accepted on a timely  basis,  if at
all.  Also,  if regulatory  approval of a product is granted,  such approval may
entail limitations on the indicated uses for which such product may be marketed.

    In 1988, the FDA issued "fast-track"  regulations intended to accelerate the
approval  process  for  the   development,   evaluation  and  marketing  of  new
therapeutic and diagnostic products used to treat  life-threatening and severely
debilitating   illnesses,   especially  for  those  for  which  no  satisfactory
alternative therapy exist.  "Fast-track" designation provides the opportunity to
interact early with the FDA in terms of protocol design,  and permits,  although
it does not  require  the FDA to grant  approval  after  completion  of Phase II
clinical  trials  (although  the FDA may require  subsequent  Phase III clinical
trials or even  post-approval  Phase IV safety  and/or  efficacy  studies).  The
Company  believes that a number of its product  candidates may fall within these
regulations,  but there can be no assurance  that any of the Company's  products
will receive this or other  similar  regulatory  treatment,  or will be approved
under accelerated approval regulations.

    Orphan Drug Designation. Under the Orphan Drug Act, the FDA may grant orphan
drug designation to drugs intended to treat a "rare disease or condition," which
is generally a disease or condition that affects fewer than 200,000  individuals
in  the  United  States.  Orphan  Drug  Designation  must  be  requested  before
submitting a BLA or PLA/ELA, or in the case of a drug, NDA. After the FDA grants
Orphan Drug  Designation,  the generic identity of the therapeutic agent and its
potential orphan use are disclosed  publicly by the FDA. Orphan Drug Designation
does not convey any  advantage  in, or shorten the duration  of, the  regulatory
review and  approval  process.  If a product  that has Orphan  Drug  Designation
subsequently  receives  FDA approval  for the  indication  for which it has such
designation, the product is entitled to orphan exclusivity, i.e. the FDA may not
approve any other  applications  to market the same drug for the same indication
except in very limited circumstances, for seven years. There can be no assurance
that  competitors  will  not  receive  approval  of  other,  different  drugs or
biologics  for the  same  indications  sought  by the  Company.  Thus,  although
obtaining FDA approval to market a product with Orphan Drug  exclusivity  can be
advantageous, there can be no assurance that it would provide the Company with a
material commercial benefit.

    Foreign Regulations. Whether or not FDA approval has been obtained, approval
of a product by comparable  regulatory  authorities in foreign  countries may be
necessary prior to  commencement of marketing the product in such countries.  In
certain  instances,  the Company may seek approval to market and sell certain of
its products  outside of the United States before  submitting  applications  for
U.S.  approval  to the  FDA.  The  regulatory  procedures  for  approval  of new
pharmaceutical products vary significantly among foreign countries. The clinical
testing  requirements  and  the  time  required  to  obtain  foreign  regulatory
approvals may differ from that required for FDA approval.  Although there is now
a centralized  European  Community ("EU") approval  mechanism in place,  each EU
country may  nonetheless  impose its own  procedures and  requirements,  many of
which are time consuming and expensive. Thus, there can be substantial delays in
obtaining   required   approvals  from  both  the  FDA  and  foreign  regulatory
authorities  after the  relevant  applications  are filed,  and  approval in any
single  country  may  not be a  meaningful  indication  that  the  product  will
thereafter be approved in another country.

COMPETITION

    There are many  companies,  both  publicly  and  privately  held,  including
well-known  pharmaceutical  companies,  as well as academic  and other  research
institutions, that are engaged in the discovery, development, marketing and sale
of products  for the  treatment  of cancer.  These  include  new  pharmaceutical
products  and  new  biologically   derived  products,   including  vaccines  and
macrophage activators.  The Company expects to encounter significant competition
for its product  candidates  from 


                                       34




traditional  and new  treatment  methods.  The  Company  is aware of a number of
companies that have products based on immunoactivation principles or intended to
treat the  indications  targeted by the  Company,including  Avigen,  Inc.,  Akzo
Pharma  Group,  Aphton  Corp.,  Biomira,   Inc.,  Cell  Genesys,  Inc.,  Cel-Sci
Corporation,  Centocor,  Inc., Corixa Corporation,  Cytel Corp.,  EndoRex Corp.,
Epigen,  Inc.,  IDEC  Pharmaceutical  Corp.,  ImClone  Systems,   Inc.,  Janssen
Pharmaceuticals  (a  division  of Johnson & Johnson),  Medarex,  Inc.,  Oncogene
Science,  Inc., RIBI ImmunoChem Research,  Inc.,  Schering-Plough Corp., Therion
Biologics   Corporation,   Chiron  Viagene,   Inc.  and  Vical,   Inc.   Janssen
Pharmaceuticals  and  Schering-Plough  Corp.  recently received FDA clearance to
market  products  in the  United  States  for  surgical  adjuvant  treatment  of
colorectal  carcinoma and melanoma,  respectively,  and Centocor,  Inc. recently
received  approval  to market a product in Germany for the  adjuvant  therapy of
colorectal cancer.

    The  Company  believes  that its  competitive  success  will be based on its
ability to license and maintain  scientifically  advanced technology,  establish
and maintain key research, manufacturing and distribution relationships,  obtain
required regulatory approvals,  attract and retain scientific personnel,  obtain
patent or other  protection for its products,  and manufacture and  successfully
market its products either independently or through collaborative partners. Most
of the  Company's  competitors  and  potential  competitors  have  substantially
greater capital,  research and development capabilities and human resources than
the Company.  Furthermore,  many of these competitors have significantly greater
experience  than the Company in  undertaking  preclinical  testing and  clinical
trials of new  biotechnology  products and  obtaining  FDA and other  regulatory
approvals.  If the  Company is  permitted  to commence  commercial  sales of any
product,  it will also be competing with  companies that have greater  resources
and experience in manufacturing,  marketing and sales. The Company's competitors
may succeed in developing products that are more effective, less costly, or have
a better side effect profile than any that may be developed by the Company,  and
such  competitors  may also  prove to be more  successful  than the  Company  in
manufacturing,  marketing  and sales.  If the  Company  is able to  successfully
commercialize a product,  subsequent competitive  developments could render such
product noncompetitive or obsolete.

PRODUCT LIABILITY AND INSURANCE

    The Company's business exposes it to potential product liability risks which
are inherent in the manufacturing,  clinical testing, marketing and use of human
therapeutic  products.  The Company  currently  carries clinical trial liability
insurance  in the  amount of $1  million  per  occurrence  and $1 million in the
aggregate,  although this insurance does not currently  cover the on-going Phase
III clinical trial for ACT.  There can be no assurance that the coverage  limits
of the Company's  insurance  policy will be adequate,  and a successful claim in
excess of the  coverage  limits  could  have a  material  adverse  effect on the
Company.  The Company plans to obtain product liability  insurance  covering the
commercial sale of its products prior to their commercial introduction, however,
there can be no  assurance  that the Company  will be able to obtain or maintain
such insurance on acceptable  terms or that any insurance  obtained will provide
adequate coverage against potential  liabilities.  Claims or losses in excess of
any liability  insurance  coverage now carried or  subsequently  obtained by the
Company could have a material adverse effect on the Company.

SCIENTIFIC ADVISORY BOARD

    The Company has assembled a Scientific Advisory Board which meets for a full
day once a quarter to discuss  areas of scientific  and medical  interest to the
Company.  The Company uses the ideas and information from these meetings to help
determine the direction of the Company's scientific  endeavors.  The Company has
entered  into  agreements  with each  member of the  Scientific  Advisory  Board
providing that all  inventions  made by such member when working for the Company
belong to the Company.  The Company has granted options to purchase Common Stock
to most  members of the  Scientific  Advisory  Board as  compensation  for their
efforts,  and intends to continue to do so in the future. The Company provides a
cash stipend of $1,000 per month to certain  members of the Scientific  Advisory
Board.  The  members  of the  Scientific  Advisory  Board  and  their  principal
positions and experience are set forth below:

    Michael Mastrangelo, M.D. Dr. Mastrangelo is Chairman of Jenner's Scientific
Advisory  Board and a Professor of Medicine and Associate  Clinical  Director of
the Cancer Center at Jefferson Medical College. Dr. Mastrangelo has been working
in cancer  immunotherapy and vaccine  development for over 25 years, is founding
Editor of Seminars in Oncology,  and past President of the Society of Biological
Therapy.


                                       35






    Stuart A.  Aaronson,  M.D. Dr.  Aaronson is the  Director of the  Ruttenberg
Cancer Center,  Mount Sinai Medical  Center,  New York. He was formerly Chief of
the  Laboratory  of  Cellular  and  Molecular  Biology  at the  National  Cancer
Institute and, before that,  head of the Molecular  Biology Section of the Viral
Carcinogenesis  Branch  of the  National  Cancer  Institute.  He  serves  on the
Editorial Boards of several  journals,  including the  International  Journal of
Oncology and Onocology Research.

    Byron  William  Brown,  Ph.D.  Dr.  Brown  is  the  former  Chairman  of the
Department of Health,  Research and Policy and a Professor and Head, Division of
Biostatistics,   at  Stanford   University.   Dr.  Brown  is  a  member  of  the
International  Institute of Statistics  and the Institute of Medicine,  National
Academy of Sciences.  He served on the Editorial Board of Statistics in Medicine
and was head of the  Statistical  Office for the  Northern  California  Oncology
Group.

    Isaiah J. Fidler  D.V.M.,  Ph.D. Dr. Fidler holds the R.E. "Bob" Smith Chair
in Cell  Biology  and is a Professor  and  Chairman  in the  Department  of Cell
Biology at the University of Texas, M.D. Anderson Cancer Center. Dr. Fidler is a
past  President  of the  American  Association  for  Cancer  Research  and is an
Associate  Editor of several  journals  including  Cancer  Research,  Journal of
Immunotherapy,  Selective  Cancer  Therapies,  and  Melanoma  Research.  He  has
published over 400 articles in the area of cancer metastases and immunology.

    Philip O.  Livingston,  M.D.  Dr.  Livingston  is a Member  of the  Memorial
Sloan-Kettering Cancer Center and Attending Physician on the clinical immunology
service at Memorial  Hospital in New York City. Dr. Livingston has worked in the
area of evaluating  immune  responses in cancer  patients and in cancer  vaccine
development  for over 20 years.  He was the leader of a group which  developed a
vaccine  which is currently in a Phase III clinical  trial for the  treatment of
melanoma being conducted by two clinical cooperative groups.

    Jeffrey  Schlom,  Ph.D.  Dr.  Schlom  is  Chief of the  Laboratory  of Tumor
Immunology  and  Biology,  Division  of Basic  Sciences at the  National  Cancer
Institute.  Dr. Schlom has worked in the area of tumor immunotherapy for over 20
years and has published over 400 manuscripts.

    Lynn E. Spitler,  M.D. Dr. Spitler is the founder of Jenner and has been its
President and Chief  Scientific  Officer since  December  1992.  Dr. Spitler has
worked in the area of cancer therapy for over 25 years. Dr. Spitler was formerly
Senior Vice President of Xoma Corporation.  She serves on the Editorial Board of
Cancer Biotherapy and  Radiopharmaceuticals and was on the Board of Directors of
the Society of  Biological  Therapy  until her term was  completed in 1996.  Dr.
Spitler received the Dernham Senior  Fellowship from the American Cancer Society
from 1969 to 1971 and the Research  Career  Development  Award from the National
Institutes of Health from 1971 to 1976.

    James E. Talmadge,  Ph.D.  Dr.  Talmadge is a Professor in the Department of
Pathology and  Microbiology at the University of Nebraska  Medical  Center.  Dr.
Talmadge  is or has  been an  Associate  Editor  and  board  member  of  several
journals, including Cancer Research, Cancer Immunology and Immunotherapy and The
Journal  of  Immunology.  He was  formerly  head  of the  Preclinical  Screening
Laboratory  of the  National  Cancer  Institute  --  Frederick  Cancer  Research
Facility.

    Carl R. Alving,  M.D.  (ex officio,  CRADA  representative).  Dr.  Alving is
Chief,  Department  of  Membrane  Biochemistry,  Walter Reed Army  Institute  of
Research.  He was elected to the rank of Fellow of the American  Association for
the  Advancement of Science for studies on the practical  uses of liposomes.  He
holds numerous  patents and has developed  liposomal  inventions as vehicles for
vaccines. He also serves on the Editorial Boards of several journals,  including
the Journal of Immunological Methods and Vaccine Research.

    Anthony E. Maida, III, M.B.A. (ex officio, Management  representative).  Mr.
Maida has been the Company's Chief Executive Officer since December 1992, and is
responsible for operations,  business development and strategic  direction.  Mr.
Maida actively  participates in all Company  Scientific Board meetings.  He is a
member of the Genetic and Environmental  Toxicology Association,  the Society of
Toxicology and the American Chemical Society.


                                       36






EMPLOYEES AND FACILITIES

    As of December 31, 1996, the Company had five employees,  of whom three were
involved  in  research  and  development  and two were  involved  in finance and
administration. The Company believes that its relationship with its employees is
good.

    The Company leases  approximately 200 square feet of office space located in
San Ramon,  California.  The Company  intends to lease an additional  600 square
feet in the same  location in the second  quarter of 1997.  The lease expires in
December  1997.  The  Company  intends  to lease  additional  space as needed to
accommodate  an increase in personnel and believes  that adequate  space will be
available to do so.

LEGAL PROCEEDINGS

    The Company is not involved in any legal proceedings.
















                                       37





                                   MANAGEMENT

EXECUTIVE OFFICERS, DIRECTORS AND KEY EMPLOYEES

    The  executive  officers,  directors  and key employees of the Company as of
January 31, 1997 are as follows:


<TABLE>
<CAPTION>
                  NAME                       AGE                    POSITION
                  ----                       ---                    --------
<S>                                           <C>   <C>
Lynn E. Spitler, M.D..                        58    President, Chief Scientific Officer,
                                                      Director

Anthony E. Maida, III                         44    Chief Executive Officer, Chief Financial
                                                     Officer, Director

Thomas P.H. Twaddell, M.D.                    59    Vice President of Clinical Research and
                                                     Product Development

Larry E. Moore                                54    Treasurer

Jack L. Bowman(2)                             64    Director

Lowell M. Dicke(1)                            57    Director

Isaiah J. Fidler, D.V.M., Ph.D.               60    Director

Robert A. Fildes, Ph.D(1)                     58    Director

Herbert Grossman(1)                           66    Director

Hayden Leason(1)                              66    Director

</TABLE>

- -----------
(1) Member of the Audit Committee.

(2) Member of the Compensation Committee.


    All directors hold office until the next annual meeting of stockholders  and
until their  successors  are duly  elected.  Officers  are  appointed  to serve,
subject to the discretion of the Board of Directors,  until their successors are
appointed.

    Lynn E. Spitler,  M.D., is the founder of Jenner and has been its President,
Chief  Scientific  Officer and a director since  inception in December 1992. Dr.
Spitler has worked in the area of cancer  therapy for over 25 years,  and, prior
to founding the Company, Dr. Spitler was among the founders of Xoma Corporation,
a cancer therapy  company,  where she was Senior Vice President for seven years.
Since March 1991, she has been the Director of the Northern  California Melanoma
Center,  a melanoma  clinical  practice group.  She also serves on the Editorial
Board of  Cancer  Biotherapy  and  Radiopharmaceuticals  and was on the Board of
Directors of the Society of  Biological  Therapy until her term was completed in
1996.  Dr.  Spitler  received the Dernham  Senior  Fellowship  from the American
Cancer Society from 1969 to 1971 and the Research Career  Development Award from
the National  Institutes of Health from 1971 to 1976. Dr.  Spitler  received her
M.D. from the University of Michigan Medical School in 1963.

    Anthony E. Maida,  III, has been Chief  Executive  Officer,  Chief Financial
Officer and a director of the Company since  inception in December  1992, and is
responsible  for the Company's  operations,  business  development and strategic
direction.  From  1990 to  November  1992,  Mr.  Maida was  President  and Chief
Executive Officer of Cellpath,  Inc, a biotechnology company. Prior to that, Mr.
Maida spent ten years with  Lockheed  Corporation,  a designer and  developer of
defense and space  technology,  where he most recently  served as Vice President
and Chief Financial  Officer of a subsidiary of Lockheed.

                                       38






He is a member of the  Genetic and  Environmental  Toxicology  Association,  the
Society of Toxicology and the American Chemical  Society.  Mr. Maida received an
M.S. in Toxicology  from San Jose State  University  in 1986 and an M.B.A.  from
Santa Clara University in 1978.

    Thomas  P.H.  Twaddell,  M.D.,  joined the  Company in January  1997 as Vice
President of Clinical  Research and Product  Development.  Dr. Twaddell has more
than 10 years of experience  in managing  clinical  trials and FDA  submissions.
From June 1991 until January 1997, Dr. Twaddell was a Clinical  Scientist in the
Immunology-Oncology  department of  Genentech,  Inc., a  biotechnology  company.
Prior to that,  he was the  Director  of  Gastroenterology  for Glaxo,  Inc.,  a
pharmaceutical  company , where he was  responsible  for the NDA submissions and
FDA  interactions  for  Zofran,  a drug for  prevention  of nausea and  vomiting
associated  with  chemotherapy.  Prior  to  that,  he was an  Associate  Medical
Director at Sandoz  Pharmaceutical  Corporation,  a pharmaceutical  company. Dr.
Twaddell received his M.D. from the University of Pennsylvania in 1963.

    Larry E. Moore,  has been a  consultant  to the Company  since  inception in
December 1992 and was appointed as Treasurer in January 1997. For the past eight
years, Mr. Moore has been a self-employed financial and accounting consultant to
companies  in  several  industries,   including  medical  research,   electronic
manufacturing  and real  estate  development.  Mr.  Moore  received  his B.S. in
Accounting  from  the San  Diego  State  University  and is a  certified  public
accountant.

    Jack L. Bowman  joined the Company as a member of the Board of  Directors in
December 1993. Since January 1994, Mr. Bowman has been retired.  From 1987 until
December  1993,  Mr. Bowman was Company Group  Chairman at Johnson & Johnson,  a
health care  company.  Mr. Bowman is a member of the Board of Directors of NeoRx
Corp., Cell Therapeutics, Inc., PharmaGenics, Inc. and CytRx Corp., all of which
are publicly  traded  companies.  Mr. Bowman received his B.A. in Education from
Western Washington University.

    Lowell M. Dicke  joined the Company as a member of the Board of Directors at
its  inception  in  December  1992.  Mr.  Dicke has served as  President,  Chief
Financial Officer and Director of Diversified Investors Corporation,  a publicly
held  investment  company,  since December  1994.  From January 1990 to December
1994, Mr. Dicke was self-employed as a financial consultant.  Mr. Dicke received
a J.D. from Yale University.

    Isaiah J. Fidler,  D.V.M., Ph.D. joined the Company as a member of the Board
of Directors in July 1996.  Dr. Fidler holds the R.E.  "Bob" Smith Chair in Cell
Biology and is Chairman of the  Department of Cell Biology at the  University of
Texas,  M.D.  Anderson Cancer Center,  where he has been a professor since 1983.
Dr. Fidler is a past President of the American  Association  for Cancer Research
and is an  Associate  Editor of  several  journals  including  Cancer  Research,
Journal  of  Biological  Response  Modifiers,  Selective  Cancer  Therapies  and
Melanoma Research. Dr. Fidler received his D.V.M. from Oklahoma State University
in 1963 and his Ph.D. in Pathology from the University of Pennsylvania in 1970.

    Robert A.  Fildes,  Ph.D.  joined  the  Company  as a member of the Board of
Directors at its inception in December  1992.  Dr. Fildes has served as Chairman
and Chief  Executive  Officer of  Scotgen  Biopharmaceuticals,  a  biotechnology
company,  since February 1993. From January 1991 to January 1993, Dr. Fildes was
self-employed  as a  biotechnology  consultant.  From  1982 to 1990,  he was the
President and Chief Executive Officer of Cetus  Corporation,  which was acquired
by Chiron  Corporation  in 1991.  In 1978,  Dr.  Fildes  became  the first  U.S.
employee of Biogen, Inc., a biotechnology  company,  where he worked until 1981.
Dr. Fildes is a member of the Board of Directors of Carrington Laboratories Inc.
and La Jolla Pharmaceuticals,  both of which are publicly traded companies.  Dr.
Fildes  received  his  B.Sc.  in 1961 and a D.C.C.  and  Ph.D.  in 1964 from the
University of London.

    Herbert Grossman joined the Company as a member of the Board of Directors at
its inception in December 1992. Mr. Grossman has served as the President,  Chief
Executive  Officer and  director of Beacon  Laboratories  LLC, a  pharmaceutical
company,  since July 1995.  From  October  1992 until June 1995,  he served as a
consultant to Ortho Diagnostics  Systems, a diagnostic company and a division of


                                       39





Johnson & Johnson. From May 1988 until September 1992, he held various positions
with Zambon Corporation,  a pharmaceutical company, most recently as Chairman of
the Board. Mr. Grossman serves on the Board of Directors of Dermasciences, Inc.,
a publicly  traded  company.  Mr.  Grossman  received his B.S. from the Brooklyn
College of Pharmacy.

    Hayden  Leason  joined the Company as a member of the Board of  Directors in
June 1993. He has served as Chairman of the Board of Advanced Photonics, Inc., a
publicly held company that  manufactures  electrical  equipment,  since November
1996.  From 1992 to October 1996,  Mr. Leason was retired.  In 1964,  Mr. Leason
founded  Filtertek,  now a division of Schawk Inc.  and  manufacturer  of insert
molded filters,  and served as Chief Executive Officer and Chairman of the Board
until 1992.

DIRECTOR COMPENSATION

    Directors  are  not  currently  paid  any  compensation  for  attendance  at
directors' meetings or for attending or participating in any committee, although
the Board  expects to review and may revise its policy in this regard  following
the Offering.  Directors are reimbursed for reasonable out-of-pocket expenses in
connection with attendance at such meetings.

    On December 10, 1992, prior to the Company's  adoption of its 1993 Incentive
Stock Plan,  the Company  granted a stock option to purchase 7,158 shares of the
Company's  Common  Stock at an exercise  price of $0.00693  per share to Herbert
Grossman  in  connection  with his  services as a director  of the  Company.  On
September 18, 1995, in  connection  with his services to the Company,  including
services  as a  director,  the Company  granted to Mr.  Maida a stock  option to
purchase 143,129 shares of Common Stock at an exercise price of $0.21 per share.
On July 29, 1996, in connection  with their  services as directors,  the Company
granted to each of Messrs.  Bowman,  Dicke, Fildes and Grossman stock options to
purchase  7,157  shares of the Company 's Common  Stock at an exercise  price of
$0.23 per share.  On July 29, 1996,  in  connection  with their  services to the
Company,  including  services as directors,  the Company  granted to each of Mr.
Maida and Dr.  Spitler stock options to purchase  28,625 shares of the Company's
Common Stock.  Mr.  Maida's  options are  exercisable at $0.23 per share and Dr.
Spitler's  options are exercisable at $0.24 per share. See " -- Employee Benefit
Plans."

BOARD COMMITTEES

    The  Audit  Committee  of  the  Board  of  Directors  reviews  the  internal
accounting  procedures of the Company and consults with and reviews the services
provided by the Company's  independent auditors.  The Compensation  Committee of
the Board of Directors  reviews and recommends to the Board the compensation and
benefits of all  officers of the Company  and  establishes  and reviews  general
policies relating to compensation and benefits of employees of the Company.

EMPLOYMENT AGREEMENTS

    In November 1994, the Company  executed  employment  agreements with each of
Lynn E.  Spitler,  M.D. and Anthony E. Maida,  III (the  "Executives").  On each
anniversary of the execution date of the employment agreements,  the term of the
employment  agreements is automatically  extended to a date three years from the
respective  anniversary  date,  unless  the  Company  shall  have  provided  the
Executive  with at least 60 days prior  notice to such  anniversary  date of its
intent not to renew the employment agreement.  The employment agreements provide
the Executives with a monthly salary, and medical and vacation benefits together
with the following:  (i) in the event the  Executive's  employment is terminated
without  cause,  the  Executive is entitled to severance  payments  equal to the
Executive's monthly salary computed at the time of such termination payable from
the date employment is terminated to the  termination  date of the agreement and
all accrued benefits and bonuses,  (ii) in the event the Executive's  employment
is  terminated  as a  result  of  the  Company  experiencing  adverse  financial
conditions  (i.e.,  bankruptcy  or cessation of  operations),  the  Executive is
entitled to a payment of up to $50,000  (subject to applicable law) and (iii) in
the event the  Executive's  employment is terminated by death,  the  Executive's
estate is entitled to severance payments equal to the Executive's monthly salary
computed at the time of death payable from the time of death to the  termination
date of the agreement and all accrued benefits and bonuses.


                                       40




EXECUTIVE COMPENSATION

    Summary   Compensation   Table.  The  following  table  sets  forth  certain
information  for the year ended December 31, 1996 regarding the  compensation of
the  Company's  Chief  Executive  Officer  and the  Company's  other most highly
compensated executive officer whose total annual salary and bonus for the fiscal
year ended  December 31, 1996 were in excess of $100,000  (the "Named  Executive
Officers").

                        SUMMARY COMPENSATION TABLE


<TABLE>
<CAPTION>
                                                                                 ANNUAL          LONG-TERM
                                                                              COMPENSATION     COMPENSATION
                                                                              ------------     ------------
                     NAME AND PRINCIPAL POSITION                    YEAR        SALARY($)     OPTIONS/SARS(#)
                     ---------------------------                    ----        ---------    ---------------
<S>                                                                 <C>       <C>            <C>
Anthony E. Maida, III                                               1996        $133,333          28,625
 Chief Executive Officer, Chief Financial Officer, Director                

Lynn E. Spitler, M.D.                                               1996        $133,331          28,625
 President, Chief Scientific Officer, Director                             
</TABLE>                                                                

    Option Grants in Last Fiscal Year. The following table sets forth each grant
of stock options made during the fiscal year ended  December 31, 1996 to each of
the Named Executive Officers:


               OPTION GRANTS IN YEAR ENDED DECEMBER 31, 1996


<TABLE>
<CAPTION>
                                                  
                                                                                          
                                                                                          
                                                  INDIVIDUAL GRANTS                                        
                                                 --------------------                    POTENTIAL REALIZABLE 
                                                                                            VALUE AT ASSUMED   
                                 NUMBER OF       PERCENT OF                               ANNUAL RATES OF STOCK  
                                SECURITIES      TOTAL OPTIONS                              PRICE APPRECIATION  
                                UNDERLYING       GRANTED TO      EXERCISE                  FOR OPTION TERM(4)      
                                  OPTIONS       DURING FISCAL     PRICE      EXPIRATION   ---------------------
            NAME               GRANTED(#)(1)      1996(%)(2)    ($/SH)(3)       DATE        5%($)      10%($)
            ----               -------------      ----------    ---------       ----        -----      ------
<S>                           <C>                <C>            <C>           <C>          <C>         <C>
Anthony E. Maida, III             28,625            25.8%         $0.23       7/29/03      $2,680      $6,246
Lynn E. Spitler, M.D.             28,625            25.8%         $0.24       7/29/03      $2,797      $6,518
</TABLE>

- ----------
(1)  Options were granted under the Company's 1993  Incentive  Stock Option Plan
     and vest  monthly  over  three  years from May 1996,  subject to  continued
     employment with or services to the Company.

(2)  Based on an aggregate of 111,076 options granted by the Company in the year
     ended  December 31, 1996 to employees  of and  consultants  to the Company,
     including the Named Executive Officers.

(3)  The  exercise  price per share of each  option was equal to the fair market
     value of the Common Stock on the date of grant as  determined  by the Board
     of Directors except for the options granted to Lynn E. Spitler,  M.D. which
     were  granted at an exercise  price of 110% of the fair market value on the
     date of grant.

(4)  The  potential  realizable  value  is  calculated  based on the term of the
     option at its time of grant (seven years).  It is calculated  assuming that
     the fair market  value of the  Company's  Common Stock on the date of grant
     appreciates at the indicated annual rate compounded annually for the entire
     term of the option and that the  option is  exercised  and sold on the last
     day of its  term  for  the  appreciated  stock  price.  These  numbers  are
     calculated  based on the  requirements  promulgated  by the  Securities and
     Exchange  Commission  and do not reflect the  Company's  estimate of future
     stock price growth.


                                       41






    Option  Exercises  in Last Fiscal  Year and Fiscal  Year End Option  Values.
There were no stock option  exercises  during the year ended  December 31, 1996.
The  following  table sets forth for each of the Named  Executive  Officers  the
number and value of securities  underlying  unexercised options held at December
31, 1996:

      AGGREGATE OPTION EXERCISES IN YEAR ENDED DECEMBER 31, 1996 AND
                    OPTION VALUES AT DECEMBER 31, 1996


<TABLE>
<CAPTION>
                                 NUMBER OF UNEXERCISED          VALUE OF UNEXERCISED
                                       OPTIONS AT             IN-THE-MONEY OPTIONS AT
                                 DECEMBER 31, 1996(#)         DECEMBER 31, 1996($)(1)
                                 --------------------         ------------------------
          NAME                 EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
          ----                 -----------   -------------   -----------   -------------
<S>                           <C>           <C>             <C>           <C>
Anthony E. Maida, III            69,975        101,779        $509,990      $ 741,523
Lynn E. Spitler, M.D.             6,361         22,264        $ 49,361      $ 161,636

</TABLE>


- ----------
(1)  Based on a value of $7.50 per share,  the assumed  initial public  offering
     price,  minus the per share  exercise  price,  multiplied  by the number of
     shares underlying the option.


EMPLOYEE BENEFIT PLANS

    1993 Incentive  Stock Plan.  The Company's  1993  Incentive  Stock Plan (the
"1993 Plan")  provides for the grant of incentive stock options to employees and
nonstatutory  stock options to employees,  directors  and  consultants.  Options
granted under the 1993 Plan typically  vest over three years.  As of January 31,
1997,  options to purchase an aggregate  of 363,800  shares of Common Stock were
outstanding  and 1,950  shares had been  issued  upon  exercise  of  outstanding
options.  Options  granted  under  the 1993  Plan  will  remain  outstanding  in
accordance  with their terms,  but the Board of Directors has determined that no
further options will be granted under the 1993 Plan.

    Non-Plan Stock Options. Prior to adopting the 1993 Plan, the Company granted
options to purchase a total of 28,629 shares of its Common Stock.  As of January
31, 1997, non-plan options to purchase 14,314 shares were outstanding and 14,315
shares had been issued upon exercise of  outstanding  options.  The Company does
not plan to make any future option grants outside of its existing option plans.

    1997 Stock Plan.  The Company's  1997 Stock Plan (the "1997 Plan")  provides
for the grant of  incentive  stock  options  to  employees  (including  employee
directors)  and  nonstatutory   stock  options  and  stock  purchase  rights  to
employees,  directors and consultants. A total of 350,000 shares of Common Stock
have been reserved for issuance  under the 1997 Plan, all of which are currently
available  for  grant.  The 1997  Stock  Plan is  administered  by the  Board of
Directors.  Options and stock  purchase  rights granted under the 1997 Plan will
vest as determined by the Board,  and may  accelerate and become fully vested in
the event of an acquisition of the Company if so determined.  The exercise price
of options  and stock  purchase  rights  granted  under the 1997 Plan will be as
determined by the Board,  although the exercise price of incentive stock options
must be at least equal to the fair market value of the Company's Common Stock on
the date of grant.  The Board of Directors  may amend or modify the 1997 Plan at
any time.  The 1997 Plan will  terminate  in  January  2007,  unless  terminated
earlier by the Board of Directors.

    The Company has agreed that it will not, without the Representative's  prior
written  consent,  for a period  of 12  months  from the  effective  date of the
Registration Statement adopt, propose to adopt, or otherwise permit to exist any
additional equity compensation plans or similar  arrangements  providing for (i)
the grant,  sale,  or issuance of stock  options,  warrants,  or other rights to
acquire the Company's  securities to any of the  Company's  executive  officers,
directors,  employees,  consultants  or holders  of


                                       42





5% or more of the Company's  Common Stock;  (ii) the grant,  sale or issuance of
any option,  warrant or other right to acquire the Company's securities or enter
into any agreement to grant, sell or issue any option, warrant or other right to
acquire the  Company's  securities  at an  exercise  price that is less than the
greater  of the fair  market  value on the date of grant or sale or the  initial
public  offering  price of the shares;  (iii)  allow for the  maximum  number of
shares of Common Stock or other securities of the Company  purchasable  pursuant
to options or warrants issued by the Company, together with the shares of Common
Stock acquired upon exercise of outstanding  options,  to exceed 728,114 shares;
(iv) allow for the payment for such  securities  with any form of  consideration
other than cash;  or (v) allow for the existence of stock  appreciation  rights,
phantom options or similar arrangements.

LIMITATION OF LIABILITY AND INDEMNIFICATION

    The Company's Certificate of Incorporation limits the liability of directors
to the maximum  extent  permitted by Delaware  law.  Delaware law provides  that
directors of a corporation  will not be personally  liable for monetary  damages
for breach of their fiduciary duties as directors,  except liability for (i) any
breach of their duty of loyalty to the  corporation  or its  stockholders,  (ii)
acts or omissions not in good faith or which involve intentional misconduct or a
knowing violation of law, (iii) unlawful payments of dividends or unlawful stock
repurchases  or  redemptions  or (iv) any  transaction  from which the  director
derived an improper  personal  benefit.  Such  limitation of liability  does not
apply to  liabilities  arising  under the federal  securities  laws and does not
affect the  availability  of equitable  remedies  such as  injunctive  relief or
rescission.

    The Company's  Bylaws provide that the Company shall indemnify its directors
and executive  officers and may  indemnify its other  officers and employees and
other agents to the fullest extent  permitted by law. The Company  believes that
indemnification under its Bylaws covers at least negligence and gross negligence
on the part of  indemnified  parties.  The  Company's  Bylaws  also permit it to
secure insurance on behalf of any officer, director, employee or other agent for
any liability arising out of his or her actions in such capacity,  regardless of
whether the Bylaws permit such indemnification.

    The Company has entered into  agreements  to  indemnify  its  directors  and
executive officers, in addition to indemnification provided for in the Company's
Bylaws.  These agreements among other things,  indemnify the Company's directors
and  executive  officers  for  certain  expenses  (including  attorney's  fees),
judgments,  fines and  settlement  amounts  incurred  by any such  person in any
action or  proceeding,  including  any  action  by or the  right of the  Company
arising out of such person's  services as a director or executive officer of the
Company,  any  subsidiary  of the Company or any other  company or enterprise to
which the person  provides  services at the request of the Company.  The Company
believes  that these  provisions  and  agreements  are  necessary to attract and
retain qualified persons as directors and executive officers.

    There is no currently pending litigation or proceeding involving a director,
officer,  employee or other agent of the Company in which  indemnification would
be required or permitted.  The Company is not aware of any threatened litigation
or   proceeding   which   would   provide   the  basis  for  a  claim  for  such
indemnification.






                                       43






                              CERTAIN TRANSACTIONS

    In May 1993, the Company entered into a Series A Preferred Stock and Warrant
Purchase  Agreement with Hayden Leason, a director and principal  stockholder of
the Company.  Pursuant to the  agreement,  the Company  issued 992,056 shares of
Series A Preferred Stock to Mr. Leason at a price of $800,000. In addition,  the
Company issued a warrant to Mr. Leason to purchase additional shares of Series A
Preferred  Stock. Mr. Leason exercised this warrant in January 1994 and acquired
an additional 992,056 shares of Series A Preferred Stock at a price of $800,000.
The shares of Series A Preferred  Stock  issued to Mr.  Leason will convert into
1,145,034 shares of Common Stock upon consummation of this Offering.

    In July  1995,  the  Company  entered  into a Series B  Preferred  Stock and
Warrant  Purchase  Agreement  with Mr. Leason.  Pursuant to the  Agreement,  the
Company  issued  496,028 shares of Series B Preferred  Stock  (convertible  into
286,258 shares of Common Stock upon consummation of this Offering) to Mr. Leason
at a price of $600,000. In addition,  the Company issued a warrant to Mr. Leason
to purchase up to 2,146,931  shares of Common Stock.  Mr.  Leason  exercised the
warrant  as to  715,649  shares in March  1996 at a price of  $50,000  and as to
286,258  shares in May 1996 at a price of $20,000.  In  connection  with the May
exercise,  the Company and Mr.  Leason agreed to terminate the warrant as to the
remaining shares.

    In February 1996, the Company caused TherAtid,  Incorporated ("TherAtid") to
be formed as a  California  corporation.  TherAtid was formed for the purpose of
entering  into the license  agreement  (the  "Novartis  License")  with Novartis
Corporation.  See  "Business -- Licenses."  TherAtid  issued  200,000  shares of
Common  Stock to Mr.  Leason at a price of $200 and  1,000,000  shares of Common
Stock to Isaiah J. Fidler,  D.V.M.,  Ph.D. at a price of $1,000. Dr. Fidler is a
director and  principal  stockholder  of Jenner.  In addition,  TherAtid  issued
1,818,180  shares of Series A  Preferred  Stock to Jenner at a price of $999,999
and a warrant to  purchase  additional  shares of Series A Preferred  Stock.  In
August  1996,  TherAtid  was  merged  with and into  Jenner.  As a result of the
merger,  Jenner  became the  successor  to the Novartis  License,  the shares of
TherAtid Common Stock issued to Mr. Leason were converted into 115,420 shares of
Jenner  Common Stock,  the shares of TherAtid  Common Stock issued to Dr. Fidler
were  converted  into 577,100  shares of Jenner Common Stock,  and the shares of
TherAtid  Series A  Preferred  Stock  and the  warrant  issued  to  Jenner  were
canceled.

    From March through May 1996, the Company borrowed an aggregate of $3 million
from Mr.  Leason.  The loan  bears  simple  interest  at 10% per  annum  and all
principal  and  interest  is due  and  payable  on May 6,  1999.  The  loan  was
originally secured by the TherAtid  securities issued to Jenner.  However,  with
the merger of TherAtid into Jenner, the loan is now unsecured.

    In August 1996, the Company entered into a Consulting  Agreement with Isaiah
J.  Fidler,  D.V.M.,  Ph.D.,  a director of the  Company,  pursuant to which Dr.
Fidler agreed to assist the Company in developing proprietary compounds, ACT and
JT3002 and their  respective  analogs,  in exchange  for an aggregate of $48,000
payable over the term of the agreement. The agreement expires in August 1997.

    In September 1996, the Company entered into a Sponsored  Research  Agreement
with the  University of Texas M.D.  Anderson  Cancer  Center ("M.D.  Anderson").
Under the agreement,  M.D. Anderson will perform certain research related to the
preclinical  development  of JT3002 for the  adjuvant  therapy of cancer and the
abrogation  of  mucositis,  GI toxicity  and  myelosuppression  in exchange  for
funding in the aggregate amount of $425,752.  All inventions made solely by M.D.
Anderson's  personnel or the  Company's  personnel  will be the sole property of
M.D. Anderson or the Company,  respectively,  and all property developed jointly
by  personnel  of M.D.  Anderson  and the Company  will be owned  jointly.  With
respect to the property owned solely by M.D.  Anderson or jointly by the Company
and M.D.  Anderson,  the  Company  has the  option  to  negotiate  the terms and
conditions of a license  agreement with M.D.  Anderson.  If the Company and M.D.
Anderson do not reach  agreement on the terms and  conditions  of such a license
agreement  within 180 days, the Company shall have a right of first refusal with
respect to any third party offers that are more favorable to M.D.  Anderson than
those offered by the Company.  The research performed by M.D. Anderson under the
agreement will be directed by Dr. Fidler.


                                       44





                             PRINCIPAL STOCKHOLDERS

    The following table sets forth certain information  regarding the beneficial
ownership of the Company's  Common Stock as of December 31, 1996 and as adjusted
to reflect the sale by the Company of the Securities offered hereby, by (i) each
director of the Company,  (ii) each Named Executive  Officer,  (iii) each person
known to the Company to be the beneficial owner of more than 5% of the Company's
Common Stock, and (iv) all directors and executive  officers of the Company as a
group.  Except as otherwise  indicated,  based on  information  furnished by the
beneficial  owners of the Common Stock listed below,  the Company  believes that
such owners have sole  investment  and voting power with respect to such shares,
subject to community property laws where applicable.  See "Certain Transactions"
and "Risk Factors -- Concentration of Ownership."


                                                        
                                                          PERCENTAGE OF VOTING 
                                           NUMBER OF    STOCK BENEFICIALLY OWNED
                                            SHARES      ------------------------
                                         BENEFICIALLY      BEFORE        AFTER
       NAME AND ADDRESS                     OWNED         OFFERING     OFFERING
       ----------------                     -----         --------     --------
Lowell M. Dicke(1)                            23,458         1.0%           *
 Diversified Investors Corporation
  82 Wall Street
  New York, NY 10005

Isaiah J. Fidler, D.V.M., Ph.D(2)            584,257        12.6%           8.2%
 Department of Cell Biology -- 173
  MD Anderson Cancer Center
  1515 Holcombe Boulevard
  Houston, TX 77030

Robert A. Fildes, Ph.D.(3)                    23,458         1.0%           *
 905 Pepperwood Drive
  Danville, CA 94506

Jack Bowman(4)                                 9,145         *              *
 3077 Scenic Avenue
  Lummi Island, WA 98262

Anthony E. Maida, III(5)                     258,484         5.5%           3.6%
 2010 Crow Canyon Place, Suite 100
  San Ramon, CA 94853

Herbert Grossman(6)                            9,146         *              *
 35 Highland Drive
  West Caldwell, NJ 07006

Hayden Leason(7)                           2,548,610        55.1%          35.8%
 W4269 Southland Road
  Lake Geneva, WI 53147

Lynn E. Spitler, M.D.(8)                   1,072,829        23.2%          15.1%
 2010 Crow Canyon Place, Suite 100
  San Ramon, CA 94853

All directors and executive officers   
 as a group (8 persons)(9)                 4,529,387        95.9%          62.7%


- ------------
 *  Less than 1%.

(1) Includes 397 shares  issuable upon  exercise of stock  options  exercisable
     within 60 days of December 31, 1996.

                                       45







(2)  Includes 289,017 shares of Common Stock initially  subject to repurchase by
     the  Company.  One  twenty-fourth  of the  shares  were  released  from the
     repurchase  option on April 30, 1996 and an additional one twenty-fourth of
     the shares are  released  at the end of each full month  thereafter,  based
     upon Dr. Fidler's continued relationship to the Company.

(3)  Includes 1,988 shares  issuable upon exercise of stock options  exercisable
     within 60 days of December 31, 1996.

(4)  Consists  of  9,145  shares   issuable   upon  exercise  of  stock  options
     exercisable within 60 days of December 31, 1996.

(5)  Includes an aggregate of 49,747 shares that have been gift  transferred  to
     members of Mr. Maida's family. Mr. Maida disclaims  beneficial ownership of
     all  shares  held by such  transferees  except for  43,282  shares  held in
     custodianship  under the California  Uniform Transfer to Minors Act for the
     benefit of Mr. Maida's minor children. Also includes 79,515 shares issuable
     upon exercise of stock options  exercisable  within 60 days of December 31,
     1996.

(6)  Includes 1,988 shares  issuable upon exercise of stock options  exercisable
     within 60 days of December 31, 1996.

(7)  Includes an aggregate of 288,998 shares that have been gift  transferred to
     friends  and to  members  of Mr.  Leason's  family.  Mr.  Leason  disclaims
     beneficial ownership of all shares held by such transferees.

(8)  Includes an aggregate of 248,335 shares that have been gift  transferred to
     friends  and to members of Dr.  Spitler's  family.  Dr.  Spitler  disclaims
     beneficial ownership of all shares held by such transferees.  Also includes
     7,951 shares issuable upon exercise of stock options  exercisable within 60
     days of December 31, 1996.

(9)  Includes an aggregate of 587,080 shares  previously gift transferred by Mr.
     Maida,  Mr.  Leason and Dr.  Spitler.  See Notes 5, 7 and 8. Also  includes
     100,984 shares issuable upon exercise of stock options  exercisable  within
     60 days of December 31, 1996.


                                       46





                            DESCRIPTION OF SECURITIES

    Upon the  closing of this  Offering,  the  authorized  capital  stock of the
Company will consist of 30,000,000  shares of Common Stock, par value $0.001 per
share, and 5,000,000 shares of Preferred Stock, $0.001 par value (the "Preferred
Stock").  At December  31,  1996,  there were  4,621,886  shares of Common Stock
outstanding held of record by approximately 51 stockholders.

COMMON STOCK

    The holders of Common  Stock are entitled to one vote for each share held of
record on all matters  submitted to a vote of the  stockholders.  Subject to any
outstanding Preferred Stock preference, the holders of Common Stock are entitled
to receive ratably the dividends, if any, that may be declared from time to time
by the Board of Directors out of funds legally available for such dividends. The
Company  has never  declared a dividend  and does not  anticipate  doing so. See
"Dividend Policy." Subject to any outstanding Preferred Stock preference, in the
event of a liquidation, dissolution or winding up of the Company, the holders of
Common Stock are entitled to share ratably in all assets remaining after payment
of liabilities.  Holders of Common Stock have no preemptive  rights and no right
to convert their Common Stock into any other securities. There are no redemption
or sinking fund provisions  applicable to the Common Stock.  All the outstanding
shares of Common  Stock are,  and the shares of Common Stock to be issued in the
Offering will be, validly issued, fully paid and nonassessable.

PREFERRED STOCK

    Effective upon the closing of this Offering,  the Company will be authorized
to issue 5,000,000 shares of undesignated Preferred Stock, none of which will be
outstanding upon the closing of this Offering.  The Board of Directors will have
the  authority,  without  further  action  by the  stockholders,  to  issue  the
undesignated  Preferred  Stock  in one  or  more  series,  to  fix  the  rights,
preferences,  privileges and restrictions  granted to or imposed upon any wholly
unissued shares of undesignated  Preferred Stock and to fix the number of shares
constituting  any series and the  designation  of such  series.  The issuance of
Preferred  Stock may have the effect of  delaying,  deferring  or  preventing  a
change in control of the Company without further action by the stockholders, may
discourage  bids for the  Company's  Common  Stock at a premium  over the market
price of the Common Stock and may  adversely  affect the market price of and the
voting and other rights of the holders of Common Stock. At present,  the Company
has no plans to issue any of the Preferred Stock.

WARRANTS

    The following is a brief summary of certain provisions of the Warrants,  but
such summary does not purport to be  complete.  A copy of the Warrant  Agreement
has  been  filed as an  exhibit  to the  Registration  Statement  of which  this
Prospectus is a part. See "Additional Information."

    Exercise  Price and Terms.  Each  Warrant  entitles  the  registered  holder
thereof to purchase,  at any time over a  forty-eight  month  period  commencing
twelve (12) months after the date of this Prospectus,  one share of Common Stock
at a price of $ per share [140% of the initial public offering price per share],
subject to adjustment in accordance with the  anti-dilution and other provisions
referred  to below.  The holder of any  Warrant  may  exercise  such  Warrant by
surrendering the certificate representing the Warrant to the Warrant Agent, with
the  subscription  form thereon properly  completed and executed,  together with
payment of the  exercise  price.  The  Warrants  may be exercised at any time in
whole  or in part at the  applicable  exercise  price  until  expiration  of the
Warrants. No fractional shares will be issued upon the exercise of the Warrants.

    The exercise  price of the Warrants bears no  relationship  to any objective
criteria  of value and should in no event be regarded  as an  indication  of any
future market price of the Securities offered hereby.

    Adjustments.  The  exercise  price and the number of shares of Common  Stock
purchasable upon the exercise of the Warrants are subject to adjustment upon the
occurrence  of  certain  events,   including  stock  dividends,   stock  splits,
combinations or reclassifications of the Common Stock, or sale by the 

                                       47





Company  of shares of its  Common  Stock or other  securities  convertible  into
Common  Stock  at a  price  below  the  then-applicable  exercise  price  of the
Warrants.   Additionally,  an  adjustment  would  be  made  in  the  case  of  a
reclassification  or exchange of Common  Stock,  consolidation  or merger of the
Company with or into another  corporation  (other than a consolidation or merger
in  which  the  Company  is  the  surviving  corporation)  or  sale  of  all  or
substantially all of the assets of the Company in order to enable warrantholders
to  acquire  the kind and  number  of  shares  of stock or other  securities  or
property  receivable in such event by a holder of the number of shares of Common
Stock that might otherwise have been purchased upon the exercise of the Warrant.

    Redemption  Provisions.  Commencing  eighteen  (18) months after the date of
this Prospectus,  the Warrants are subject to redemption at $0.10 per Warrant on
thirty  (30) days' prior  written  notice to the  warrantholders  if the average
closing bid price of the Common Stock as reported on the American Stock Exchange
equals or exceeds $ per share [160% of the  initial  public  offering  price per
share of Common  Stock]  for any twenty  (20)  trading  days  within a period of
thirty (30)  consecutive  trading days ending on the fifth  trading day prior to
the date of the notice of  redemption.  In the event the Company  exercises  the
right to redeem the Warrants,  such Warrants will be exercisable until the close
of business on the business day  immediately  preceding the date for  redemption
fixed in such notice.  If any Warrant  called for redemption is not exercised by
such  time,  it will  cease  to be  exercisable  and the  warrantholder  will be
entitled only to the redemption price.

    Transfer, Exchange and Exercise. The Warrants are in registered form and may
be presented to the Warrant Agent for transfer, exchange or exercise at any time
on or prior to  their  expiration  date  five  (5)  years  from the date of this
Prospectus,  at which time the Warrants become wholly void and of no value. If a
market for the Warrants  develops,  the holder may sell the Warrants  instead of
exercising  them.  There can be no  assurance,  however,  that a market  for the
Warrants will develop or continue.

    Warrantholder Not a Stockholder. The Warrants do not confer upon holders any
voting, dividend or other rights as stockholders of the Company.

    Modification  of Warrant.  The  Company and the Warrant  Agent may make such
modifications  to the Warrant as they deem  necessary and desirable  that do not
adversely  affect the interests of the  warrantholders.  The Company may, in its
sole  discretion,  lower the exercise  price of the Warrants for a period of not
less than thirty  (30) days on not less than  thirty  (30) days'  prior  written
notice to the warrantholders and the Representative.  Modification of the number
of securities  purchasable upon the exercise of any Warrant,  the exercise price
and the  expiration  date with  respect to any Warrant  requires  the consent of
two-thirds  of the  warrantholders.  No other  modifications  may be made to the
Warrants, without the consent of two-thirds of the warrantholders.

    A  significant  amount  of the  securities  offered  hereby  may be  sold to
customers  of the  Representative.  Such  customers  subsequently  may engage in
transactions  for the sale or  purchase of such  securities  through or with the
Representative.  Although  it has no  obligation  to do so,  the  Representative
currently intends to make a market in the Company's securities and may otherwise
effect  transactions in such securities.  If it participates in the market,  the
Representative may exert a dominating  influence on the market, if one develops,
for the securities described in this Prospectus. Such market-making activity may
be discontinued at any time. The price and liquidity of the Common Stock and the
Warrants  may  be  significantly   affected  by  the  degree,  if  any,  of  the
Representative's participation in such market. See "Underwriting."

    The Warrants are not exercisable  unless,  at the time of the exercise,  the
Company has a current  prospectus  covering the shares of Common Stock  issuable
upon exercise of the Warrants,  and such shares have been registered,  qualified
or deemed to be exempt  under the  securities  laws of the state of residence of
the  exercising  holder of the Warrants.  Although the Company will use its best
efforts to have all the shares of Common  Stock  issuable  upon  exercise of the
Warrants  registered or qualified on or before the exercise date and to maintain
a current  prospectus  relating  thereto  until the  expiration of the Warrants,
there can be no assurance that it will be able to do so.

    The Warrants are separately transferable immediately upon issuance. Although
the  Securities  will not knowingly be sold to purchasers  in  jurisdictions  in
which  the  Securities  are not  registered  or  otherwise  qualified  for sale,
purchasers may buy Warrants in the aftermarket or may move to 

                                       48





jurisdictions in which the shares  underlying the Warrants are not so registered
or qualified during the period that the Warrants are exercisable. In this event,
the  Company  would be  unable  to issue  shares to those  persons  desiring  to
exercise  their  Warrants,  and holders of Warrants  would have no choice but to
attempt to sell the Warrants in a jurisdiction where such sale is permissible or
allow them to expired unexercised.

REGISTRATION RIGHTS OF CERTAIN HOLDERS

    The  holders  of  1,860,680   shares  of  Common  Stock  (the   "Registrable
Securities") or their transferees are entitled to certain rights with respect to
the  registration  of such shares  under the  Securities  Act.  These rights are
provided under the terms of an agreement  between the Company and the holders of
Registrable  Securities.  Subject to certain  limitations in the agreement,  the
holders  of at least  80% of the  Registrable  Securities  may  require,  on one
occasion  beginning  six  months  after  the date of this  Prospectus,  that the
Company use its best efforts to register the  Registrable  Securities for public
resale  (the  "Requested  Registration").  If the Company  registers  any of its
Common  Stock  either for its own account or for the  account of other  security
holders,  the holders of  Registrable  Securities  are entitled to include their
shares  of Common  Stock in the  registration,  subject  to the  ability  of the
underwriters to limit the number of shares included in the offering. Any holders
of the Registrable  Securities may also require the Company to register all or a
portion  of their  Registrable  Securities  on Form  S-3  when use of such  form
becomes available to the Company,  provided,  among other limitations,  that the
proposed  aggregate  selling  price  of such  shares  (net of any  underwriters'
discounts or commissions) is at least $1 million. All registration  expenses for
the  Requested  Registration  must  be  borne  by  the  Company  and  all  other
registration  expenses and selling expenses  relating to Registrable  Securities
must be borne by the holders of the securities being registered.

DELAWARE ANTI-TAKEOVER LAW AND CERTAIN CHARTER AND BYLAW PROVISIONS

    Jenner is a  Delaware  corporation  and is  subject  to  Section  203 of the
Delaware General Corporation Law, an anti-takeover law. In general,  Section 203
prohibits a publicly  held  Delaware  corporation  from  engaging in a "business
combination" with an "interested  stockholder" for a period of three years after
the date the  person  became an  interested  stockholder  unless  (with  certain
exceptions)  the "business  combination"  or the transaction in which the person
became an interested stockholder is approved in a prescribed manner.  Generally,
a  "business  combination"  includes  a merger,  asset or stock  sale,  or other
transaction resulting in a financial benefit to the stockholder.  Generally,  an
"interested   stockholder"  is  a  person  who,  together  with  affiliates  and
associates,  owns (or  within  three  years  prior,  did own) 15% or more of the
corporation's voting stock. The existence of this provision would be expected to
have an  anti-takeover  effect  with  respect to  transactions  not  approved in
advance by the Board of Directors,  including  discouraging  attempts that might
result in premium  over the market  price for the shares of Common Stock held by
the stockholders.

    The  Company's  Certificate  of  Incorporation  provides  that the  Board of
Directors may issue shares of Preferred  Stock without  stockholder  approval on
such  terms as the  Board  may  determine.  The  authorization  of  undesignated
Preferred  Stock makes it possible for the Board of Directors to issue Preferred
Stock with voting or other rights or  preferences  that could impede the success
of any attempt to change  control of the  Company.  In addition,  the  Company's
Certificate  of  Incorporation  and Bylaws  eliminate  cumulative  voting in the
election of directors,  and provide that stockholder action can be taken only at
an annual or  special  meeting of  stockholders  and may not be taken by written
consent.  The Bylaws provide that special meetings of stockholders can be called
only by the Board of  Directors,  the  Chairman  of the  Board,  if any,  or the
President  of the  Company.  These and other  provisions  may have the effect of
deferring  hostile takeovers or delaying changes in control or management of the
Company.  The  affirmative  vote of the  holders of at least  two-thirds  of the
voting stock of the Company is required to amend the foregoing provisions of the
Certificate of Incorporation and Bylaws.

TRANSFER AGENT AND REGISTRAR AND WARRANT AGENT

    The name and address of the Transfer  Agent and  Registrar for the Company's
Common  Stock  and the  Warrant  Agent for the  Warrants  is  Continental  Stock
Transfer and Trust Company, 2 Broadway, New York, New York 10004.


                                       49





                         SHARES ELIGIBLE FOR FUTURE SALE

    Upon the completion of this Offering, the Company will have 7,121,886 shares
of Common  Stock  outstanding  (not  including  378,114  shares of Common  Stock
subject to outstanding  options),  assuming no exercise of options after January
31, 1997 and outstanding  warrants to purchase an additional 2,500,000 shares of
Common  Stock  assuming no exercise of the  Representative's  Warrant.  Of these
securities,  2,500,000  shares of  Common  Stock and the  Warrants  to  purchase
2,500,000  shares of Common Stock sold in this Offering will be freely tradeable
without  restriction under the Securities Act. The remaining 4,621,886 shares of
Common Stock held by existing  stockholders  were issued and sold by the Company
in reliance on exemptions from the  registration  requirements of the Securities
Act.  These  shares  may be sold in the public  market  only if  registered,  or
pursuant to an exemption from registration such as Rule 144, 144(k) or 701 under
the  Securities  Act. Such  restricted  shares will be available for sale in the
public  market 12 months after the date of this  Prospectus  upon  expiration of
lock-up agreements with the Representative as follows: (i) 2,927,449 shares (not
including  approximately  228,403 shares subject to outstanding  vested options)
will  be  available  for  immediate  sale,  subject  in  some  cases  to  volume
limitations pursuant to Rule 144 and (ii) the remaining 1,694,437 shares will be
eligible for sale at various times over a period of less than two years, subject
in some cases to vesting provisions and volume limitations.  In addition, twelve
(12) months after the  completion  of this  Offering,  250,000  shares of Common
Stock issuable upon exercise of the  Representative's  Warrants and the Warrants
to  purchase  250,000  shares of Common  Stock  issuable  upon  exercise  of the
Representative's  Warrants will be available for sale. The Company's  directors,
executive  officers  and  stockholders,  who in the  aggregate  hold 100% of the
shares of  Common  Stock of the  Company  outstanding  immediately  prior to the
completion  of this  Offering,  have entered into  lock-up  agreements  with the
Representative  under  which they have  agreed not to offer,  sell,  contract to
sell, grant any option to purchase or otherwise  dispose of, or agree to dispose
of,  directly or  indirectly,  any shares of Common  Stock or options to acquire
shares of Common Stock owned by them for a period of 12 months after the date of
this Prospectus,  without the prior written consent of the  Representative.  The
Representative  may, in its sole  discretion,  and at any time  without  notice,
release all or any portion of the shares subject to such lock-up agreements. The
Company has entered into a similar agreement,  except that the Company may grant
options and issue stock under its current stock option and stock  purchase plans
and issue stock pursuant to outstanding vested options.

    As of January 31, 1997, 378,114 shares were subject to outstanding  options.
All  of  these   shares  are  subject  to  the  lock-up   agreements   with  the
Representative described above. In addition, 1,860,680 of the shares outstanding
immediately  following  the  completion  of this  Offering  will be  entitled to
registration  rights  with  respect to such  shares  upon the release of lock-up
agreements.  The number of shares sold in the public  market  could  increase if
such rights are exercised.

    In  general,  under Rule 144 as  currently  in effect,  a person (or persons
whose shares are aggregated), including an affiliate, who has beneficially owned
shares for at least two (2) years  (including the  contiguous  holding period of
any  prior  owner  except  an  affiliate)  is  entitled  to  sell  in  "broker's
transactions" or to market makers,  within any three-month  period commencing at
least  ninety  (90) days after the date of this  Prospectus,  a number of shares
that does not exceed  the  greater  of (i) one  percent of the then  outstanding
shares of Common  Stock  (approximately  105,087  shares  immediately  after the
Offering) or (ii) the average  weekly  trading volume in the Common Stock during
the four calendar weeks  preceding the filing of a Form 144 with respect to such
sale. Sales under Rule 144 are also subject to certain requirements as to manner
of sale,  the  filing of a notice  and the  availability  of public  information
concerning the Company. In addition,  a person who is not deemed to have been an
affiliate  of the  Company at any time  during the three (3) months  preceding a
sale and who has beneficially  owned the shares proposed to be sold for at least
three (3) years  (including  the  contiguous  holding  period of any prior owner
except an  affiliate)  would be entitled  to sell such shares  under Rule 144(k)
without regard to the requirements described above.

    Any  employee,  officer or  director  of or  consultant  to the  Company who
purchased his or her shares pursuant to a written  compensatory plan or contract
is entitled to rely on the resale  provisions  of Rule 701 under the  Securities
Act, which permits nonaffiliates to sell their Rule 701 shares without having to

                                       50





comply with the public information,  holding period, volume limitation or notice
provisions  of Rule 144 and  permits  affiliates  to sell  their Rule 701 shares
without  having to comply with Rule 144's holding period  restrictions,  in each
case commencing ninety (90) days after the date of this Prospectus; however, all
persons  who hold  shares of the  Company  that  would be  eligible  for  resale
pursuant to Rule 701 have entered into agreements  with the Company  pursuant to
which they have  agreed not to sell any such  shares for a period of twelve (12)
months  from the date of this  Prospectus  (the  "Lock-up  Period")  without the
Representative's consent. See "Underwriting."

    Prior to the Offering,  there has been no market for the Common Stock or the
Warrants of the Company,  and no predictions can be made of the effect,  if any,
that market sales of shares or the  availability of shares for sale will have on
the  market  price  prevailing  from  time  to  time.  Nevertheless,   sales  of
substantial  amounts of the Common  Stock and the Warrants of the Company in the
public market could  adversely  affect  prevailing  market prices for the Common
Stock and the Warrants and the ability of the Company to raise equity capital in
the future.









                                       51







                               UNDERWRITING

    The  Underwriters  named  below  (the   "Underwriters")  for  whom  National
Securities  Corporation  is  acting as  representative  (in such  capacity,  the
"Representative"), have severally agreed, subject to the terms and conditions of
the Underwriting Agreement (the "Underwriting Agreement"),  to purchase from the
Company,  and the  Company  has  agreed  to sell to the  Underwriters  on a firm
commitment  basis, the respective  number of shares of Common Stock and Warrants
set forth opposite their names.

    
                                              NUMBER OF                   
                                              SHARES OF
                                               COMMON        NUMBER OF
           UNDERWRITER                          STOCK         WARRANTS
           -----------                          -----         --------
    National Securities Corporation
    
    
    
    
                                              ---------      ---------
      Total                                   2,500,000      2,500,000
                                              =========      =========
    

    The  Underwriters  are  committed to purchase all the shares of Common Stock
and Warrants  offered  hereby,  if any of such  Securities  are  purchased.  The
Underwriting Agreement provides that the obligations of the several Underwriters
are subject to conditions precedent specified therein.

    The Company has been  advised by the  Representative  that the  Underwriters
propose  initially to offer the  Securities to the public at the initial  public
offering  prices set forth on the cover page of this  Prospectus  and to certain
dealers at such prices less concessions of not in excess of $_____ per Share and
$_______  per Warrant.  Such  dealers may reallow a concession  not in excess of
$_______ per Share and $______ per Warrant to certain other  dealers.  After the
commencement  of  the  Offering,  the  public  offering  price,  concession  and
reallowance may be changed by the Representative.

    The Representative has informed the Company that it does not expect sales to
discretionary  accounts  by the  Underwriters  to  exceed  five  percent  of the
Securities offered hereby.

    The  Company  has  agreed to  indemnify  the  Underwriters  against  certain
liabilities, including liabilities under the Securities Act, or to contribute to
payments  that the  Underwriters  may be required to make.  The Company has also
agreed  to pay to the  Representative  a  nonaccountable  expense  allowance  of
$500,000, of which $50,000 has been paid to date.

    The  Company  has  granted  to the  Underwriters  an  Over-Allotment  Option
exercisable  during  the  forty-five  (45)  day  period  from  the  date of this
Prospectus,  to  purchase up to an  additional  375,000  Shares of Common  Stock
and/or 375,000  additional  Warrants at the public  offering price per Share and
Warrant,  respectively,   offered  hereby,  less  underwriting  discounts.  Such
Over-Allotment  Option  may be  exercised  only  for  the  purpose  of  covering
over-allotments,  if any, incurred in the sale of the Securities offered hereby.
To the extent such Over-Allotment  Option is exercised in whole or in part, each
Underwriter  will have a firm  commitment,  subject  to certain  conditions,  to
purchase the number of the additional  Securities  proportionate  to its initial
commitment.

    In  connection  with the  Offering  the  Company  has  agreed to sell to the
Representative, for nominal consideration, warrants to purchase from the Company
up  to  250,000   Shares  of  Common  Stock   and/or   250,000   Warrants   (the
"Representative's   Warrants").  The  Representative's  Warrants  are  initially
exercisable  at a price  of  $_______  per  Share  [140% of the  initial  public
offering  price per Share] and $_______ per Warrant [140% of the initial  public
offering  price per  Warrant]  for a period  of four  years, 

                                       52





commencing  at the  beginning of the second year after their  issuance and sale.
The Representative's Warrants provide for adjustment in the numbers of shares of
Common Stock and  Warrants  issuable  upon the  exercise  thereof as a result of
certain subdivisions or combinations of the Common Stock.

    The Company's directors and executive officers, and all holders of shares of
Common Stock, options, warrants or other securities exercisable,  convertible or
exchangeable  for shares of Common  Stock,  have  agreed  not to offer,  sell or
otherwise  dispose  of any  shares of Common  Stock for a period of twelve  (12)
months following the effective date of this Prospectus without the prior written
consent of the Representative. An appropriate legend shall be marked on the face
of certificates representing all such securities.

    Upon the exercise of any Warrants  more than one year after the date of this
Prospectus,  which  exercise  was  solicited by the  Representative,  and to the
extent not  inconsistent  with the  guidelines  of the National  Association  of
Securities Dealers,  Inc., and the Rules and Regulations of the Commission,  the
Company has agreed to pay the Representative a commission which shall not exceed
five percent (5%) of the aggregate exercise price of such Warrants in connection
with bona fide services provided by the  Representative  relating to any warrant
solicitation undertaken by the Representative.  In addition, the individual must
designate  the firm  entitled  to payment of such  warrant  solicitation  fee. A
warrant solicitation fee will only be paid to the Representative or another NASD
member  when such NASD  member is  specifically  designated  in  writing  as the
soliciting broker.  However,  no compensation will be paid to the Representative
in  connection  with the exercise of the Warrants if (a) the market price of the
Common Stock is lower than the exercise  price,  (b) the Warrants were held in a
discretionary  account,  or (c) the exercise of Warrants is not solicited by the
Representative.  Unless  granted an  exemption by the  Commission  from its Rule
10b-6  under the  Exchange  Act,  the  Representative  will be  prohibited  from
engaging in any market-making activities with regard to the Company's securities
for the period from nine (9) business days (or other such applicable  periods as
Rule  10b-6  may  provide)  prior to any  solicitation  of the  exercise  of the
Warrants until the later of the termination of such solicitation activity or the
termination (by waiver or otherwise) of any right the representative may have to
receive a fee.  As a result,  the  Representative  may be unable to  continue to
provide a market for the Common Stock or Warrants  during certain  periods while
the Warrants are exercisable.  If the  Representative  has engaged in any of the
activities  prohibited  by Rule 10b-6 during the periods  described  above,  the
Representative  undertakes  to waive  unconditionally  its  rights to  receive a
commission on the exercise of such Warrants.

    The Company has agreed, at the request of the Representative, that for three
years after the date of this  Prospectus,  it will use its best efforts to cause
one individual  designated by the  Representative to be elected to the Company's
Board of Directors.

    Prior to the Offering,  there has been no public market for the Common Stock
or  the  Warrants.  Consequently,  the  initial  public  offering  price  of the
Securities  has been  determined  by  negotiation  between  the  Company and the
Representative  and does not necessarily  bear any relationship to the Company's
asset  value,  net  worth,  and other  established  criteria  of value.  Factors
considered in such  negotiations,  in addition to prevailing market  conditions,
include  the  history of and  prospects  for the  industry  in which the Company
competes,  an  assessment  of the  Company's  management,  the  prospects of the
Company,  its  capital  structure  and  certain  other  factors  as were  deemed
relevant.

    The  foregoing  is a  summary  of the  principal  terms  of  the  agreements
described above and does not purport to be complete. Reference is made to a copy
of each  such  agreement,  which  is  filed as an  exhibit  to the  Registration
Statement. See "Additional Information."




                                       53






                                  LEGAL MATTERS

    The validity of the issuance of the Securities offered hereby will be passed
upon for the  Company  by Wilson  Sonsini  Goodrich & Rosati,  P.C.,  Palo Alto,
California.  Orrick,  Herrington & Sutcliffe, LLP, New York, New York, has acted
as  counsel to the  Underwriters  in  connection  with this  Offering.  Mario M.
Rosati, a partner of Wilson,  Sonsini,  Goodrich & Rosati, P.C., is Secretary of
the Company. As of December 31, 1996 a certain investment  partnership of Wilson
Sonsini Goodrich & Rosati, P.C.  beneficially owned an aggregate of 6,442 shares
of the  Company's  Common  Stock and  Mario M.  Rosati  owned 717  shares of the
Company's Common Stock.

                                     EXPERTS

    The  financial  statements of Jenner  Technologies,  Inc. as of December 31,
1995 and 1996 and for each of the three years in the period  ended  December 31,
1996 and for the period from  inception  (December 8, 1992) to December 31, 1996
appearing in this  Prospectus  and  Registration  Statement have been audited by
Ernst & Young LLP,  independent  auditors,  as set forth in their report thereon
appearing  elsewhere herein with respect  thereto,  and are included in reliance
upon such report given upon the  authority of such firm as experts in accounting
and auditing.

                             ADDITIONAL INFORMATION

    The Company  has filed with the  Securities  and  Exchange  Commission  (the
"Commission")  Washington,  D.C.  20549, a  Registration  Statement on Form S-1,
including  amendments  thereto,  under the  Securities  Act, with respect to the
Securities  offered  hereby.  This  Prospectus  does  not  contain  all  of  the
information  set  forth  in the  Registration  Statement  and the  exhibits  and
schedules filed therewith.  For further  information with respect to the Company
and the  Securities  offered  hereby,  reference  is  made to such  Registration
Statement  and  to  the  exhibits  and  schedules  filed  therewith.  Statements
contained  in this  Prospectus  regarding  the contents of any contract or other
document  referred  to are not  necessarily  complete  and,  in  each  instance,
reference  is made to the copy of such  contract or other  document  filed as an
exhibit to the  Registration  Statement,  each such statement being qualified in
all  respects by such  reference.  The  Registration  Statement,  including  the
exhibits and schedules thereto, may be inspected without charge at the principal
office of the Commission,  450 Fifth Street, N.W.,  Washington,  D.C. 20549, and
copies of all or any part  thereof  may be  obtained  from such  office upon the
payment of prescribed fees. Such information is also available electronically by
means of the Commission's web site on the Internet at http:/www.sec.gov.








                                       54






                          INDEX TO FINANCIAL STATEMENTS

                            JENNER TECHNOLOGIES, INC.

                          (A DEVELOPMENT STAGE COMPANY)




                                                                            PAGE
                                                                            ----
 Report of Ernst & Young LLP, Independent Auditors                           F-2

 Balance Sheets as of December 31, 1994, 1995, and 1996                      F-3

 Statements of Operations for the years ended December 31, 1994,
   1995 and 1996 and for the period from Inception  (December 8,
   1992) to December 31, 1996                                                F-4

 Statement of Stockholders' Equity (Net Capital Deficiency)
  for the period from Inception (December 8, 1992) to December 31, 1996      F-5

 Statements of Cash Flows for the years ended December 31, 1994, 1995
  and 1996, and for the period from Inception (December 8, 1992) to
  December 31, 1996                                                          F-7

 Notes to Financial Statements December 31, 1996                             F-8







                                      F-1







               REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

The Board of Directors and Shareholders
 Jenner Technologies, Inc.

    We have audited the accompanying balance sheets of Jenner Technologies, Inc.
(a  development  stage  company) at December 31, 1995 and 1996,  and the related
statements of operations,  stockholders'  equity (net capital  deficiency),  and
cash flows for each of the three years in the period ended December 31, 1996 and
for the period from  inception  (December 8, 1992) to December  31, 1996.  These
financial  statements are the  responsibility of the Company's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

    We conducted  our audits in  accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

    In our opinion,  the financial  statements referred to above present fairly,
in all material respects, the financial position of Jenner Technologies, Inc. (a
development stage company) at December 31, 1995 and 1996, and the results of its
operations  and its cash flows for each of the three  years ended  December  31,
1996 and for the period from inception  (December 8, 1992) to December 31, 1996,
in conformity with generally accepted accounting principles.


                                         ERNST & YOUNG LLP




Palo Alto, California
January 14, 1997, except as for Note 7,
 as to which the date is
 March   , 1997

- ------------

The foregoing  report is in the form that will be signed upon the  completion of
the restatement of the capital  accounts as described in Note 7 to the financial
statements.

Palo Alto, California
February 18, 1997







                                      F-2






                           JENNER TECHNOLOGIES, INC.
                       (A Development Stage Company)

                              BALANCE SHEETS




<TABLE>
<CAPTION>
                                                                                  
                                                                                                                    UNAUDITED
                                                                                                                    PRO FORMA
                                                                                                                  STOCKHOLDERS'
                                                                                                               EQUITY (NET CAPITAL
                                                                                         DECEMBER 31,           DEFICIENCY) AT
                                                                                   ------------------------       DECEMBER 31,
                                                                                      1995          1996              1996
                                                                                   -----------   ----------    --------------------
                                                                                                                    (NOTE 7)
<S>                                                                                <C>           <C>               <C>
                                     ASSETS                                       
Current assets:                                                                   
   Cash and cash equivalents                                                       $   317,635   $ 1,428,510
   Deferred offering costs                                                                  --       102,514
                                                                                   -----------   -----------
Total current assets                                                                   317,635     1,531,024
Equipment                                                                               18,504        35,637
Less accumulated depreciation                                                           (9,393)      (16,153)
                                                                                   -----------   -----------
                                                                                         9,111        19,484
Other assets                                                                             9,625        12,884
                                                                                   -----------   -----------
                                                                                   $   336,371   $ 1,563,392
                                                                                   ===========   ===========
                                                                                  
                               LIABILITIES AND STOCKHOLDERS' EQUITY (NET CAPITAL DEFICIENCY)

Current liabilities:
   Accounts payable                                                                $     14,562  $    72,351                       
   Accrued offering costs                                                                   --        44,000
   Accrued liabilities                                                                      --        97,226
   Notes payable to related party                                                       42,124            --
   Accrued interest                                                                      6,410            --
                                                                                   -----------   -----------
Total current liabilities                                                               63,096       213,577
Long-term note payable to related party                                                     --     3,000,000
Accrued interest due to related party                                                       --       201,985
Commitments                                                                       
Stockholders' equity (net capital deficiency):                                    
  Preferred stock, $0.001 par value, 5,000,000 shares authorized; issuable        
    in series (none issued and outstanding pro forma):                            
      Series A convertible, 2,137,500 shares designated, 2,120,522  shares        
       issued and outstanding in 1995 and 1996 (liquidation preference of         
       $2,035,000 at December 31, 1996)                                              1,710,400     1,710,400       $        --
      Series B convertible, 500,000 shares designated, 496,028 shares issued      
        and outstanding in 1995 and 1996 (liquidation preference of $645,000      
        at December 31, 1996)                                                          600,000       600,000                --
   Common stock, $0.001 par value, 30,000,000 shares authorized, 1,411,424        
     and 3,111,871 shares issued and outstanding in 1995 and 1996,                
     respectively (4,621,886 shares issued and outstanding pro forma)                   11,766       619,156             4,622
   Additional paid-in capital                                                              --             --         2,924,934
   Deferred compensation                                                                   --        (45,000)          (45,000)
   Deficit accumulated during the development stage                                (2,048,891)    (4,736,726)       (4,736,726)
                                                                                   ----------     ----------        ---------- 
Total stockholders' equity (net capital deficiency)                                   273,275     (1,852,170)      $(1,852,170)
                                                                                   ----------     ----------        ========== 
                                                                                  $   336,371    $ 1,563,392
                                                                                  ===========    ===========
</TABLE>


                          See accompanying notes.

                                      F-3






                           JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

                             STATEMENT OF OPERATIONS




<TABLE>
<CAPTION>
                                                       
                                                                                        PERIOD FROM
                                                                                         INCEPTION
                                                                                       (DECEMBER 8,
                                                      YEAR ENDED DECEMBER 31,            1992) TO
                                                 -----------------------------------    DECEMBER 31,
                                                   1994        1995          1996          1996
                                                 ---------   ---------   -----------   -------------
<S>                                              <C>         <C>         <C>            <C>
Operating expenses:
   Research and development                      $ 499,366   $ 698,303   $ 2,206,900    $ 3,743,195
   General and administrative                      228,114     195,663       339,948        901,050
                                                 ---------   ---------   -----------    -----------
                                                   727,480     893,966     2,546,848      4,644,245
                                                 ---------   ---------   -----------    -----------
Loss from operations                              (727,480)   (893,966)   (2,546,848)    (4,644,245)
Interest (expense) income                           22,369      17,100      (140,987)       (92,481)
                                                 ---------   ---------   -----------    ----------- 
Net loss                                         $(705,111)  $(876,866)  $(2,687,835)   $(4,736,726)
                                                 =========   =========   ===========    =========== 
Pro forma net loss per share                                             $     (0.56)
                                                                         =========== 
Shares used in calculation of pro forma
 net loss per share                                                         4,785,863
                                                                         ============
</TABLE>

                          See accompanying notes.

                                      F-4





                            JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

           STATEMENT OF STOCKHOLDERS' EQUITY (NET CAPITAL DEFICIENCY)
          Period from Inception (December 8, 1992) to December 31, 1996




<TABLE>
<CAPTION>



                                        
                                    PREFERRED STOCK                                                                    
                          --------------------------------------                                           DEFICIT         TOTAL   
                              SERIES A              SERIES B                                            ACCUMULATED    STOCKHOLDERS'
                             CONVERTIBLE           CONVERTIBLE        COMMON STOCK                      DURING THE     EQUITY (NET 
                          -----------------     ----------------    -----------------      DEFFERRED    DEVELOPEMENT      CAPITAL  
                          SHARES     AMOUNT     SHARES    AMOUNT    SHARES     AMOUNT    COMPENSATION      STAGE        DEFICIENCY)
                          ------     ------     ------    ------    ------     ------    ------------      -----        ----------- 
                                                                                                                       
<S>                      <C>       <C>         <C>      <C>        <C>        <C>       <C>            <C>             <C>

Issuance   of   common
  stock at $0.007  per
  share to founders in
  exchange   for  cash
  and   technology  in
  December   1992  and
  June 1993                --     $       --     --    $  --       1,334,718   $ 2,360      $   --        $     --     $    2,360  
                                                                                                                                   
Issuance   of   common                                                                                                            
  stock at  $0.14  per                                                                                                           
  share  in   exchange       
  for  technology  and                                                                                                             
  services   in  April                                                                                                            
  through October 1993     --             --     --       --          45,706     6,387          --              --          6,387  
                                                                                                               
                           
Issuance   of   common                                                                                                           
  stock at $0.007  per                                                                                                            
  share upon  exercise                                                                                                            
  of stock  options in                                                                                                            
  May 1993                 --            --      --       --           3,877        27          --              --             27 
                                                                                                              
                                                                                                                                  
Issuance  of  Series A                                                                                                            
  convertible             
  preferred  stock  at    
  $0.8064   per  share    
  and  a  warrant   to    
  purchase     992,056    
  shares  of  Series A    
  convertible             
  preferred  stock  at    
  an exercise price of    
  $0.8064  for cash in    
  May   through   July    
  1993                  1,128,466    910,400     --       --               --       --           --             --         910,400 
                                                                                                                                  
Net  loss  for  period                                                                                                            
  from       inception    
  (December  8,  1992)   
  to December 31, 1993         --        --      --       --               --        --          --          (466,914)    (466,914)
                        ---------    -------   -----   ------       ---------     -----                     --------      ------- 
                                                                                                                  
                                                                                                                                   
Balances  at  December                                                                                                            
  31, 1993              1,128,466    910,400     --        --        1,384,301     8,774          --         (466,914)     452,260
                                                                                                                                 

Issuance  of  Series A                                                                                                            
  convertible                                                                                                                     
  preferred  stock for     
  cash at $0.8064  per                                                                                                            
  share   in   January                                                                                                            
  1994  upon  exercise                                                                                                            
  of warrant              992,056    800,000     --        --               --       --            --              --      800,000

                           
Issuance   of   common                                                                                                            
  stock to consultants   
  at $0.14  per  share    
  in   exchange    for
  services  in January
  1994                        --         --      --        --           20,756    2,900            --               --       2,900 


Issuance   of   common
  stock   at   $0.007-
  $0.14 per share upon
  exercise   of  stock
  options    in    May
  through October 1994        --         --      --        --            1,651      59             --               --          59  


Net loss                      --         --      --        --               --      --             --         (705,111)   (705,111)
                        ---------    -------   -----    ------       ---------     -----                     --------      ------- 
          

Balances  at  December
  31,  1994   (carried
  forward)              2,120,522  $1,710,400    --     $  --        1,406,708  $11,733        $   --      $(1,172,025)   $550,108


</TABLE>

                               See accompanying notes.

                                       F-5




                            JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

    STATEMENT OF STOCKHOLDERS' EQUITY (NET CAPITAL DEFICIENCY) -- (Continued)
          Period from Inception (December 8, 1992) to December 31, 1996



<TABLE>
<CAPTION>



                                        
                                    PREFERRED STOCK                                                                    
                          --------------------------------------                                           DEFICIT         TOTAL   
                              SERIES A              SERIES B                                            ACCUMULATED    STOCKHOLDERS'
                             CONVERTIBLE           CONVERTIBLE        COMMON STOCK                      DURING THE     EQUITY (NET 
                          -----------------     ----------------    -----------------      DEFFERRED    DEVELOPEMENT      CAPITAL  
                          SHARES     AMOUNT     SHARES    AMOUNT    SHARES     AMOUNT    COMPENSATION      STAGE        DEFICIENCY)
                          ------     ------     ------    ------    ------     ------    ------------      -----        -----------
                                                                                                                       
<S>                      <C>       <C>         <C>      <C>        <C>        <C>       <C>            <C>             <C>

Balances  at  December    
  31,  1994   (brought                                                                                                             
  forward)              2,120,522  $1,710,400       --  $     --    1,406,708  $ 11,733   $     --     $(1,172,025)   $   550,108  
                                                                                                                   
                                                                                                                                   
Issuance  of  Series B                                                                                                             
  convertible                                                                                                                      
  preferred  stock  at                                                                                                             
  $1.21  per share and                                                                                                             
  a     warrant     to                                                                                                             
  purchase   2,146,931                                                                                                             
  shares   of   common   
  stock at an exercise                                                                                                             
  price of  $0.04  per                                                                                                             
  share  for  cash  in                                                                                                             
  July 1995                   --           --  496,028   600,000          --        --          --              --        600,000  
                                                                                                                    
                         
Issuance   of   common                                                                                                             
  stock upon  exercise    
  of stock options for                                                                                                             
  cash at  $0.007  per   
  share   in   January                                                                                                             
  through April 1995          --           --       --        --       4,716        33          --              --             33  
                                                                                                                 
                                                                                                                                   
Net loss                      --           --       --        --          --        --          --        (876,866)      (876,866) 
                        ---------   ---------- -------   -------   ---------    -------      -----       ----------      -------- 
                           
Balances  at  December                                                                                                             
  31, 1995              2,120,522    1,710,400 496,028   600,000   1,411,424    11,766          --      (2,048,891)       273,275  
                                                                                                                
                                                                                                                                   
Issuance   of   common                                                                                                             
  stock upon  exercise                                                                                                             
  of stock options for  
  cash at $0.007-$0.23                                                                                                             
  per share in 1996          --           --        --        --       6,020      390           --              --            390  
                                                                                                              
                                                                                                                                   
Issuance   of   common                                                                                                             
  stock upon  exercise                                                                                                             
  of a  warrant  at an                                                                                                             
  exercise   price  of    
  $0.07  per share for                                                                                                             
  cash  in  March  and                                                                                                             
  May 1996                   --           --        --        --   1,001,907   70,000           --              --         70,000  

                                                                                                                                   
Issuance   of   common                                                                                                             
  stock at  $0.70  per      
  share  in   exchange                                                                                                             
  for     shares    in   
  TherAtid  in  August                                                                                                             
  1996  (see  Note 2),  
  including    115,420                                                                                                             
  shares  to a related   
  party                      --           --        --        --     692,520  485,000           --              --        485,000  


Deferred  compensation
  related   to   stock
  option grants              --           --        --        --          --   52,000      (52,000)             --             --  


Amortization    of
  deferred
  compensation               --           --        --        --          --       --        7,000              --          7,000  


Net loss                     --           --        --        --          --       --           --      (2,687,835)    (2,687,835) 
                        ---------   ---------- -------   -------   ---------    -------      -----       ----------      ---------
       
Balances  at  December
  31, 1996              2,120,522  $1,710,400  496,028  $600,000  3,111,871  $619,156     $(45,000)    $(4,736,726)   $(1,852,170) 
                        =========  ==========  =======  ========  =========  ========     ========     ===========    ===========  

</TABLE>

                             See accompanying notes.

                                      F-6




                            JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

                            STATEMENTS OF CASH FLOWS




<TABLE>
<CAPTION>
                                                                        
                                                                                                         PERIOD FROM
                                                                                                          INCEPTION
                                                                                                        (DECEMBER 8,
                                                                   YEAR ENDED DECEMBER 31,                1992) TO
                                                                 ---------------------------------       DECEMBER 31,
                                                                    1994        1995          1996          1996
                                                                    ----        ----          ----          ----
<S>                                                               <C>         <C>         <C>            <C>
Cash flows from operating activities:
Net loss                                                          $(705,111)  $(876,866)  $(2,687,835)   $(4,736,726)
Adjustments to reconcile net loss to net cash used
 in operating activities:
   Depreciation and amortization                                      5,414       4,110        14,160         23,553
   Common stock issued for technology                                 2,900          --       485,000        494,287
   Changes in operating assets and liabilities:
       Prepaid offering costs                                            --          --      (102,514)      (102,514)
       Other assets                                                    (750)     (8,744)       (3,659)       (13,284)
       Accounts payable                                              (4,662)      8,314        57,789         72,351
       Accrued offering costs                                            --          --        44,000         44,000
       Accrued liabilities                                               --          --        97,226         97,226
       Accrued interest                                               3,882       2,528       195,575        201,985
                                                                   --------    --------    ----------     ----------
          Cash flows used in operating activities                  (698,327)   (870,658)   (1,900,258)    (3,919,122)
                                                                   --------    --------    ----------     ---------- 
Cash from investing activities:
   Additions to property and equipment                               (5,490)     (1,808)      (17,133)       (35,637)
Cash flows from financing activities:
   Cash proceeds from issuance of preferred stock                   800,000     600,000            --      2,310,400
   Proceeds from issuance of notes payable                               --          --     3,000,000      3,063,249
   Repayment of notes payable                                            --          --       (42,124)       (63,249)
   Proceeds from issuance of common stock                                59          33        70,390         72,869
                                                                   --------    --------     ---------      ---------
          Cash flows provided by financing activities               800,059     600,033     3,028,266      5,383,269
                                                                    -------     -------     ---------      ---------
Net increase (decrease) in cash                                      96,242    (272,433)    1,110,875      1,428,510
Cash and cash equivalents at the beginning of the period            493,826     590,068       317,635             --
                                                                    -------     -------       -------     ----------           
Cash and cash equivalents at the end of the period                $ 590,068   $ 317,635   $ 1,428,510     $1,428,510
                                                                  =========   =========   ===========     ==========
</TABLE>

                          See accompanying notes.

                                      F-7




                           JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

                          NOTES TO FINANCIAL STATEMENTS

                               DECEMBER 31, 1996

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

 ORGANIZATION, BUSINESS AND BASIS OF PRESENTATION

    Jenner  Technologies,  Inc. (the "Company") was incorporated in the State of
California  on  December  8, 1992 (see Note 7). The  Company  was  organized  to
develop  immunotherapies to treat patients with cancer. Research and development
of the  Company's  products  is  primarily  conducted  by  third  parties  under
contractual  arrangements.  The  Company's  activities  to date  have  consisted
principally of raising capital, acquiring intellectual property, and contracting
for and managing research and development performed by others. Accordingly,  the
Company is  considered  to be in the  development  stage,  and  expects to incur
increasing  losses  and  require  additional   financial  resources  to  achieve
commercialization of its products.

    Through December 31, 1996, the Company had incurred  cumulative losses since
inception  amounting  to $4.7  million,  and  management  anticipates  incurring
additional  losses for the next several years. The Company is working on several
long-term  development  projects which involve  extensive  research and clinical
testing,  may require many years and substantial  expenditures to complete,  and
which  ultimately  may be  unsuccessful.  Therefore,  the  Company's  ability to
continue as a going concern depends on its ability to raise additional financing
to meet its business plan  objectives  and,  ultimately,  to fund its operations
from  revenues.  Management  believes that it will be able to obtain  additional
funding  through the issuance of debt or equity  securities  to existing and new
investors,  including the Company's  proposed  initial  public  offering or from
strategic  collaborations with other corporations.  If adequate financing is not
available, the Company may be required to delay, scale back or eliminate certain
of its research and development programs, to relinquish rights to certain of its
technologies, product candidates, to forego desired opportunities, or to license
third parties to commercialize  products or technologies  that the Company would
otherwise seek to develop itself.

 ACCOUNTING ESTIMATES

    The  preparation  of  financial  statements  in  conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions that affect the amounts reported in the financial statements.
Actual results could differ from these estimates.

 CASH AND CASH EQUIVALENTS

    The Company considers all highly liquid investments  purchased with original
maturities of three months or less to be cash equivalents.

    The Company  invests its excess cash  primarily  in deposits  with banks and
short-term  securities.  These  securities  consist of U.S.  Treasury bills that
mature or are  redeemable  within 90 days.  The Company has not  recognized  any
material gains or losses on its cash equivalents.

    Management  determines the appropriate  classification of debt securities at
the time of purchase and reevaluates such determination as of each balance sheet
date.  Through  December  31,  1996,  the  Company  has  classified  its  entire
investment portfolio as  available-for-sale.  Available-for- sale securities are
carried at amortized  cost which  approximates  fair value at December 31, 1996.
The  estimated  fair value  amounts have been  determined  by the Company  using
available market information.

                                      F-8



                           JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

                               DECEMBER 31, 1996

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)

    The  amortized  cost of debt  securities  is adjusted  for  amortization  of
premiums and accretion of discounts to maturity.  Such  amortization is included
in interest income. Realized gains and losses and declines in value judged to be
other-than-temporary  are  included  in other  income  or  expense.  The cost of
securities  sold is based on the specific  identification  method.  Interest and
dividends are included in interest income.

 PROPERTY AND EQUIPMENT

    Property and equipment are stated at cost.  Depreciation  is provided  using
the  straight-line  method over the  estimated  useful  lives of the  respective
assets, generally three to five years.

 STOCK-BASED COMPENSATION

    As  permitted  by  Statement  of  Financial  Accounting  Standards  No. 123,
"Accounting for Stock-Based  Compensation" ("SFAS 123"), the Company has elected
to account for stock  options  granted to employees  using the  intrinsic  value
method and,  accordingly,  does not recognize  compensation  expense for options
granted to employees at fair value.

 NET LOSS PER SHARE

    Except as noted below,  historical  net loss per share is computed using the
weighted average number of common shares  outstanding.  Common equivalent shares
from  stock  options  and  convertible  preferred  stock are  excluded  from the
computation  as their  effect is  antidilutive,  except  that,  pursuant  to the
Securities and Exchange Commission Staff Accounting Bulletins, common and common
equivalent  shares  issued  during the period  beginning  12 months prior to the
initial filing of the proposed public offering at prices substantially below the
assumed public  offering price have been included in the  calculation as if they
were outstanding for all periods  presented (using the treasury stock method and
the assumed public offering price for stock options).

    Historical net loss per share information is as follows:

<TABLE>
<CAPTION>
                                                                 YEAR ENDED DECEMBER 31,
                                                                 -----------------------
                                                             1994         1995         1996
                                                             ----         ----         ----
<S>                                                       <C>          <C>          <C>
Net loss per share                                        $    (0.22) $     (0.27) $     (0.82)
                                                          ==========  ===========  =========== 
Shares used in computing net loss per share                3,263,447    3,275,374    3,275,848
                                                           =========    =========    =========
</TABLE>

    Pro forma net loss per share has been  computed as described  above and also
gives  effect  to the  conversion  of  convertible  preferred  shares  that will
automatically  convert upon completion of the Company's  initial public offering
(using the if-converted method) from the original date of issuance.

2. THERATID TRANSACTION

    During  1996,  the  Company  formed  a  subsidiary,   TherAtid  Incorporated
("TherAtid") for the purpose of entering into a license  agreement with Novartis
Corporation  ("Novartis," formerly Ciba-Geigy Limited) (see Note 3). The Company
contributed  approximately  $1,000,000  to TherAtid in  exchange  for  1,818,180
shares of Series A preferred stock and a warrant to purchase 981,820  additional
shares of Series A preferred stock at an exercise price of $2.03.  TherAtid also
issued 692,520 shares of common stock to others,  including 115,420 shares to an
individual who is a member of the Company's Board of Directors and the principal
stockholder of the Company,  for nominal  consideration in connection with their
assistance in securing the Novartis license.


                                      F-9



                           JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

                               DECEMBER 31, 1996

2. THERATID TRANSACTION -- (CONTINUED)

    In August 1996,  TherAtid was merged with and into the Company.  As a result
of the  merger,  the  Series A  preferred  stock and the  warrant  issued to the
Company were canceled,  and the outstanding shares of TherAtid common stock were
exchanged for an equal number of shares of the Company's common stock.  Prior to
the merger  transaction,  TherAtid had no  operations.  In connection  with this
transaction, the Company recognized $830,000 of research and development expense
which  consists  primarily  of the fair value of common stock issued to complete
the merger and the initial  license  payment by  TherAtid to Novartis  under the
license agreement.

3. RESEARCH LICENSES AND AGREEMENTS

 ELI LILLY AND COMPANY

    The Company has a worldwide exclusive license with Eli Lilly & Company ("Eli
Lilly") for the rights from Eli Lilly to use or  sublicense  certain  technology
and make, use or sell certain  licensed  products  relating to the patent rights
for the use of the KSA tumor associated antigen (the antigen associated with the
Company's OncoVax-CL product candidate).  The agreement calls for the Company to
make certain benchmark  payments to Eli Lilly if certain  milestones are met. No
benchmark payments were made or were due through 1996. If  commercialization  is
achieved,  the Company will be required to pay Eli Lilly a royalty  based on net
sales of the licensed products.

 NOVARTIS

    The  Company  is party to a  license  agreement  with  Novartis.  Under  the
agreement,  Novartis  granted  the  Company an  exclusive  worldwide  license to
certain patent rights and proprietary know-how for the use of various macrophage
activators for the therapy of cancer and related diseases.  In consideration for
this  technology,  the Company  paid  Novartis  an  up-front  license fee and is
required to pay annual  maintenance  fees until certain  conditions of Phase III
clinical trials relating to the technology are met. The Company is also required
to make  benchmark  payments if certain  milestones  are met. As of December 31,
1996, no milestones had been met. Upon commercialization of any licensed product
developed, the Company will pay royalties based on net sales.

 OTHER RESEARCH AGREEMENTS

    The Company has entered into several other agreements with  universities and
other research  organizations.  Such agreements generally require the Company to
make research  support  payments and benchmark  payments upon the achievement of
certain  milestones.  The Company generally owns or has the option to acquire an
exclusive  license to the results of the research and must make royalty payments
on the net  sales of any  products  developed.  Such  agreements  are  generally
cancelable  at the  option of the  Company  upon  notice of up to 30 to 60 days.
Total expenses under such agreements amounted to $50,500, $114,000, $442,000 and
$606,500 in 1994, 1995, 1996 and from inception, respectively.

4. NOTES PAYABLE TO RELATED PARTIES

    From  March  through  May  1996,  the  Company  received  $3,000,000  from a
preferred  stockholder in exchange for a promissory note bearing interest at 10%
per  annum  and  the  right  to  immediately  exercise  a  warrant  held  by the
stockholder  (see Note 5). No accounting  value was ascribed to the value of the
warrant  acceleration,  as such amount was  determined to be not  material.  All
principal and accrued interest under the Note is due and payable on May 6, 1999.
The Note is unsecured.



                                      F-10



                           JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

                               DECEMBER 31, 1996

5. STOCKHOLDERS' EQUITY

 STOCK SPLIT

    On July 10, 1996, the Company filed restated  Articles of  Incorporation  in
California  to reduce the  authorized  shares of  preferred  and common stock to
30,000,000 and 5,000,000,  respectively,  and to effect a one-for-4.032  reverse
stock split of all  outstanding  shares of common  stock,  Series A and Series B
preferred  stock,  and common stock options and  warrants.  All common share and
preferred stock and per share data in the accompanying  financial statements has
been adjusted to give effect to the reverse stock split.

 COMMON STOCK

    After  liquidation  preference  distributions  to  Series  A  and  Series  B
preferred  stockholders  have been paid,  the  remaining  assets of the  Company
available  for  distribution  to  stockholders  shall be  distributed  among the
holders of Series A preferred  stock,  Series B preferred stock and common stock
pro rata,  based on the  number of shares of common  stock held (or deemed to be
held, on an as-converted basis for preferred shares).

    In connection with the Company's  merger with TherAtid,  the Company assumed
the  repurchase  option  related to 289,017  shares of common  stock  owned by a
director.  One  twenty-fourth  of the shares subject to repurchase were released
from the repurchase option on April 30, 1996 and an additional one twenty-fourth
of the total number of shares are released from the repurchase option at the end
of each full month thereafter,  based upon the director's continued relationship
with the Company.  As of December 31, 1996, 180,636 shares remain subject to the
repurchase option at an aggregate option exercise price of $541.

 CONVERTIBLE PREFERRED STOCK

    Each share of Series A and Series B convertible  preferred stock ("preferred
stock")  is  entitled  to voting  rights  equivalent  to the number of shares of
common stock into which each share can be converted and is  convertible,  at the
option of the holder, into one share of common stock (see Note 7). Conversion is
automatic upon the closing of an  underwritten  public  offering  pursuant to an
effective registration statement under the Securities Act of 1933, which results
in a price per share of not less than $13.97 and aggregate  offering proceeds of
not  less  than  $7,500,000  or  upon  the  approval  of  more  than  80% of all
outstanding  preferred stock voting together as a single class.  The Company has
reserved  sufficient  shares of common stock for issuance upon conversion of the
outstanding Series A and Series B preferred stock.

    The Series A preferred  shares are  subject to  liquidation  preferences  of
$0.8064  per  share,  plus an  additional  amount  equal to  $0.0605  per  share
multiplied by the number of years the share was held prior to the effective date
of liquidation,  plus all declared but unpaid dividends.  The Series B preferred
shares  are  subject to  liquidation  preferences  of $1.2096  per share plus an
additional  amount equal to $0.0907 per share  multiplied by the number of years
the share was held  prior to the  effective  date of  liquidation.  Series A and
Series B preferred stockholders are entitled to noncumulative dividends at rates
of $0.0605 and $0.0907 per share,  respectively,  per annum,  if declared by the
Board of Directors  and in preference  to common stock  dividends.  No dividends
have been declared or paid by the Company.

 STOCK OPTIONS

    During 1993,  nonqualified  stock  options for 28,629 shares of common stock
were  granted to  consultants  at an  exercise  price of $0.007  per  share.  At
December  31,  1996,  14,314  of  these  options  remain   outstanding  and  are
exercisable.  The 1993 Stock Plan (the  "Plan") was  adopted in  February  1993.
Stock options  granted under the Plan may be either  incentive  stock options or
nonstatutory stock



                                      F-11



                           JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

                               DECEMBER 31, 1996

5. STOCKHOLDERS' EQUITY -- (CONTINUED)

options.  Incentive  stock  options may be granted to  employees  with  exercise
prices of no less than the fair value and nonstatutory options may be granted to
employees  or  consultants  at  exercise  prices of no less than 85% of the fair
value of the  common  stock on the grant  date,  as  determined  by the Board of
Directors.  If, at the time the Company grants an option,  the optionee directly
or by  attribution  owns stock  possessing  more than 10% of the total  combined
voting power of all classes of stock of the  Company,  the option price shall be
at least  110% of the fair  value and shall  not be  exercisable  more than five
years after the date of grant.  Options may be granted  with  different  vesting
terms from time to time.  Except as noted above,  options expire no more than 10
years after the date of grant or earlier if employment is terminated.

    During  1996,  the Company  adopted  SFAS 123.  The effect of  applying  the
minimum  value  method of SFAS 123 to options  granted to  employees in 1995 and
1996 did not  result in pro forma net loss and loss per share  amounts  that are
materially different from historical amounts reported. Therefore, such pro forma
information  is not presented  herein.  SFAS 123 is  applicable  only to options
granted  subsequent  to December 31, 1994,  and should the Company  successfully
complete the  offering,  it will no longer be able to utilize the minimum  value
method,  therefore,  the  pro  forma  effect  determined  in  1996  may  not  be
representative  of the pro forma  effect to be  reported  in future  years.  The
minimum  value  method  was  applied  using  the  following   weighted   average
assumptions for 1995 and 1996,  respectively:  risk-free interest rates of 6.09%
and 6.53%; an expected option life of six years; and no annual dividends.

    A  summary  of  activity  under  the Plan for the years  ended  December  31
follows:

<TABLE>
<CAPTION>
                                         1994                 1995                 1996
                                  -------------------  ------------------   ------------------
                                            WEIGHTED             WEIGHTED             WEIGHTED
                                             AVERAGE              AVERAGE              AVERAGE
                                            EXERCISE             EXERCISE             EXERCISE
                                  OPTIONS     PRICE    OPTIONS     PRICE    OPTIONS     PRICE
                                  -------     -----    -------     -----    -------     -----
<S>                               <C>         <C>      <C>         <C>      <C>        <C>
Outstanding at January 1           11,452     $0.14     17,463     $0.14    160,592    $ 0.20
Granted                             7,443     $0.14    143,129     $0.21    111,076    $ 0.23
Exercised                            (359)    $0.14         --     $  --     (1,591)   $ 0.22
Forfeited                          (1,073)    $0.14         --     $  --         --    $   --
                                   ------              -------              -------    ------
Outstanding at December 31         17,463     $0.14    160,592     $0.20    270,077    $ 0.19
                                   ======              =======              =======    ======
</TABLE>

    Exercise  prices of all options  outstanding  as of December 31, 1996 ranged
from  $0.007 to $0.24 and  117,441 of such  options  were vested with a weighted
average  exercise  price of  $0.18.  As of  December  31,  1996,  the  remaining
contractual life of outstanding  options ranged from 6.2 years to 9.6 years with
a weighted average contractual life of 8.8 years.

    In connection with grants of stock options to employees and directors during
1996, the Company  recorded  $52,000 for the difference  between the deemed fair
value  of the  Company's  common  stock  for  financial  statement  presentation
purposes and the  exercise  price at the date of grant.  Of such amount,  $7,000
related to options that vested prior to December 31, 1996 and, accordingly,  was
expensed  in the year then  ended.  The  remaining  $45,000  is  presented  as a
component  of  stockholders'  equity at December  31, 1996 and will be amortized
over the vesting period of the  underlying  options.  The weighted  average fair
value of options  granted  during 1996 with an  exercise  price below the deemed
fair value of the Company's  common stock for financial  statement  presentation
purposes on the date of grant was $0.23.


                                      F-12



                           JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

                               DECEMBER 31, 1996

5. STOCKHOLDERS' EQUITY -- (CONTINUED)

 WARRANT

    In connection with the sale of Series B preferred stock in 1995, the Company
issued a warrant to  purchase  2,146,931  shares of common  stock at an exercise
price of $0.04 per share to the  Series B  investor.  In 1996,  the  stockholder
exercised a portion of the warrant to purchase  715,649  shares of common stock.
In May 1996,  the Company  entered into an  agreement  with the  stockholder  to
provide the stockholder with the right to immediately exercise the warrant as to
286,258  shares of the Company's  common stock in exchange for  terminating  the
warrant  with  respect  to all  remaining  shares.  Under  this  agreement,  the
stockholder exercised his right to purchase the 286,258 shares.

 RESERVED SHARES

    As of December 31, 1996, the Company has reserved shares of common stock for
future issuance as follows:

<TABLE>
<CAPTION>
<S>                                                                    <C>
 Stock option plan:
   Outstanding options                                                   270,077
   Reserved for future grants (see Note 7)                                85,809
Convertible preferred stock:
  Issued and outstanding                                               1,510,015
                                                                       ---------
                                                                       1,865,901
                                                                       =========
</TABLE>

6. INCOME TAXES

    The  Company  uses the  liability  method to  account  for  income  taxes as
required by Statement of Financial Accounting Standards No. 109, "Accounting for
Income  Taxes."  Under this  method,  deferred  tax assets and  liabilities  are
determined  based on differences  between  financial  reporting and tax bases of
assets and  liabilities  and are measured  using enacted tax rules and laws that
will be in effect when the differences are expected to reverse.

    Significant  components of the Company's deferred tax assets and liabilities
for federal and state income taxes as of December 31 are as follows:

<TABLE>
<CAPTION>
                                                          1995          1996
                                                        ---------    -----------
<S>                                                     <C>          <C>                
Deferred tax assets:
   Net operating loss carryforwards                     $ 700,000    $ 1,400,000
   Capitalized license agreement                               --        300,000
   Research credit carryforwards                               --        100,000
   Capitalized research and development                        --        100,000
   Other, net                                             100,000        100,000
                                                          -------        -------
   Net deferred tax assets                                800,000      2,000,000
Valuation allowance                                      (800,000)    (2,000,000)
                                                         --------     ---------- 
Net deferred tax assets                                  $     --     $      -- 
                                                         ========     ==========
</TABLE>



    The net valuation allowance  increased by $130,000,  $670,000 and $1,200,000
in 1994, 1995 and 1996, respectively.

                                      F-13




                           JENNER TECHNOLOGIES, INC.
                          (A Development Stage Company)

                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)

                               DECEMBER 31, 1996


6. INCOME TAXES -- (CONTINUED)

    As of December 31, 1995 and 1996, the Company had federal net operating loss
carryforwards of approximately  $1,800,000 and $3,700,000,  respectively.  As of
December  31,  1995  and  1996,  the  Company  also  had  federal  research  and
development  tax credit  carryforwards  of  approximately  $22,000 and  $40,000,
respectively.  The net operating  loss and credit  carryforwards  will expire at
various dates beginning in 2008 and 2011, if not utilized.

    Utilization  of the net  operating  losses and  credits  may be subject to a
substantial annual limitation due to the "change in ownership" provisions of the
Internal  Revenue  Code  of  1986  and  similar  state  provisions.  The  annual
limitation  may result in the  expiration  of net  operating  losses and credits
before utilization.

7. PROPOSED INITIAL PUBLIC OFFERING AND RELATED MATTERS

    In January 1997, the Board of Directors  authorized the  reincorporation  of
the Company in the State of Delaware and a one-for-1.7328 reverse stock split of
all outstanding shares of common stock and stock options. The reincorporation is
expected to occur in March 1997. The conversion ratio of all outstanding  shares
of  convertible  preferred  stock were adjusted such that each  preferred  share
converts into 0.577 shares of common stock.  All common share and per share data
in the accompanying financial statements has been adjusted retroactively to give
effect to the reverse stock split.

    In January 1997, the Board of Directors authorized management of the Company
to file a Registration  Statement  with the  Securities and Exchange  Commission
offering shares of its common stock and warrants to the public.  If the offering
is consummated under the terms presently anticipated, all of the preferred stock
outstanding  will  automatically  convert into 1,510,015  shares of common stock
upon the closing of the offering.  Unaudited pro forma stockholders' equity (Net
Capital  deficiency)  as of  December  31,  1996 as  adjusted  for  the  assumed
conversion  of the  preferred  stock is set  forth in the  accompanying  balance
sheet.

    In January 1997,  the Board of Directors  approved the Company's  1997 Stock
Plan (the "1997  Plan")  and  initially  reserved  350,000  shares for  issuance
thereunder.  The 1997 Plan provides for the grant of incentive stock options and
stock purchase rights to employees and employee directors and nonstatutory stock
options and stock purchase rights to employees, directors and consultants.


                                      F-14





================================================================================

NO  DEALER,  SALESPERSON  OR ANY OTHER  PERSON HAS BEEN  AUTHORIZED  TO GIVE ANY
INFORMATION OR TO MAKE ANY  REPRESENTATIONS  OTHER THAN THOSE  CONTAINED IN THIS
PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR  REPRESENTATIONS  MUST NOT
BE RELIED UPON AS HAVING  BEEN  AUTHORIZED  BY THE  COMPANY OR ANY  UNDERWRITER.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER
ANY  CIRCUMSTANCES,  CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF OR THAT THE  INFORMATION  CONTAINED
HEREIN IS CORRECT AS OF ANY DATE SUBSEQUENT TO THE DATE HEREOF.  THIS PROSPECTUS
DOES NOT  CONSTITUTE AN OFFER TO SELL OR A  SOLICITATION  OF AN OFFER TO BUY ANY
SECURITIES  OFFERED HEREBY BY ANYONE IN ANY  JURISDICTION IN WHICH SUCH OFFER OR
SOLICITATION  IS NOT  AUTHORIZED  OR IN WHICH THE  PERSON  MAKING  SUCH OFFER OR
SOLICITATION  IS NOT  QUALIFIED  TO DO SO OR TO ANYONE TO WHOM IT IS UNLAWFUL TO
MAKE SUCH OFFER OR SOLICITATION.

                                   ----------

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
<S>                                                                           <C>
Prospectus Summary                                                             3
Risk Factors                                                                   7
Use of Proceeds                                                               18
Dividend Policy                                                               18
Capitalization                                                                19
Dilution                                                                      20
Selected Financial Data                                                       21
Management's Discussion and Analysis of
  Financial Condition and Results of
  Operations                                                                  22
Business                                                                      24
Management                                                                    38
Certain Transactions                                                          44
Principal Stockholders                                                        45
Description of Securities                                                     47
Shares Eligible for Future Sale                                               50
Underwriting                                                                  52
Legal Matters                                                                 54
Experts                                                                       54
Additional Information                                                        54
Index to Financial Statements                                               F-1
</TABLE>

    UNTIL  _________,  1997 (25 DAYS  AFTER  THE DATE OF THIS  PROSPECTUS),  ALL
DEALERS  EFFECTING  TRANSACTIONS  IN THE REGISTERED  SECURITIES,  WHETHER OR NOT
PARTICIPATING IN THE DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS. THIS
DELIVERY  REQUIREMENT IS IN ADDITION TO THE OBLIGATIONS OF DEALERS WHO DELIVER A
PROSPECTUS  WHEN  ACTING  AS  UNDERWRITERS  AND WITH  RESPECT  TO  THEIR  UNSOLD
ALLOTMENTS OR SUBSCRIPTIONS.  
================================================================================



================================================================================




                                     [LOGO]

                            JENNER TECHNOLOGIES, INC.

                        2,500,000 SHARES OF COMMON STOCK
                                       AND
                          2,500,000 REDEEMABLE COMMON
                            STOCK PURCHASE WARRANTS


                                   ----------
                                   PROSPECTUS
                                   ----------


                               NATIONAL SECURITIES
                                   CORPORATION




                                     , 1997


================================================================================



                                    PART II
                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

    The  following  table  sets  forth  the  costs  and  expenses,   other  than
underwriting  discounts  and  commissions,  payable by the Company in connection
with the sale of the  Securities  being  registered.  All amounts are  estimates
except the SEC  registration  fee,  the NASD filing fee and the  American  Stock
Exchange application fee.

<TABLE>
<CAPTION>
                                                                       AMOUNT TO
                                                                        BE PAID
                                                                        -------
<S>                                                                    <C>
SEC Registration Fee                                                   $  18,522
NASD Filing Fee                                                            6,612
American Stock Exchange Application Fee                                   33,000
Blue Sky Qualification Fees and Expenses                                  15,000
Printing and Engraving Expenses                                          120,000
Legal Fees and Expenses                                                  250,000
Accounting Fees and Expenses                                             130,000
Transfer Agent and Registrar Fees                                         10,000
Miscellaneous                                                             16,866
                                                                        --------
   Total                                                                $600,000
</TABLE>

ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

    Section  145  of  the  Delaware  General  Corporation  Law  allows  for  the
indemnification  of officers,  directors and any  corporate  agents in the terms
sufficiently  broad to indemnify  such persons under certain  circumstances  for
liabilities  (including  reimbursement for expenses  incurred) arising under the
Securities  Act of 1933,  as amended  (the  "Act").  The  Registrant's  Restated
Certificate  of  Incorporation  to be filed upon the closing of the  offering to
which  this  Registration   Statement  relates  (Exhibit  3.3  hereto)  and  the
Registrant's  Bylaws (Exhibit 3.5 hereto)  provides for  indemnification  of the
Registrant's directors,  officers,  employees and other agents to the extent and
under the circumstances  permitted by the Delaware General  Corporation Law. The
Registrant  also  intends  to  enter  into  agreements  with its  directors  and
executive  officers  that will  require the  Registrant  among  other  things to
indemnify  them against  certain  liabilities  that may arise by reason of their
status or service as directors to the fullest  extent not prohibited by Delaware
law.

    The Underwriting  Agreement provides for indemnification by the Underwriters
of the  Registrant,  its directors and  officers,  and by the  Registrant of the
Underwriters,  for certain liabilities,  including liabilities arising under the
Act, and affords certain rights of contribution with respect thereto.

ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES.

    (a) Since January 1994, the Registrant has sold and issued the
following securities:

       1. On January 18, 1994,  the Company  issued and sold  992,056  shares of
    Series A Preferred Stock to a director of the Company upon the exercise of a
    warrant  originally  issued May 7, 1993 at an exercise  price of $0.8060 per
    share.

       2. From April 18, 1994 to January 31,  1997,  the Company  granted  stock
    options  under the  Company's  1993  Incentive  Stock  Plan to  purchase  an
    aggregate of 355,370 shares of Common Stock to 16 employees and  consultants
    at exercise prices ranging from $0.14 to $3.00 per share.

       3. On April 29, 1994, the Company issued an aggregate of 20,756 shares of
    Common Stock to two individuals and one entity at an issuance price of $0.14
    per share in connection with a Settlement Agreement dated April 29, 1994.


                                      II-1



       4. From June 1, 1994 to March 5, 1996,  the Company issued and sold 7,158
    shares of Common  Stock to a director  of the Company  upon the  exercise of
    non-plan stock options at an exercise price of $0.00693 per share.

       5. On October 31, 1994,  the Company issued and sold 359 shares of Common
    Stock to one  employee  upon the  exercise  of stock  options at an exercise
    price of $0.14 per share  pursuant to the  Company's  1993  Incentive  Stock
    Plan.

       6. From January 1, 1995 to November 30, 1996, the Company issued and sold
    7,157 shares of Common Stock to one individual upon the exercise of non-plan
    stock options at an exercise price of $0.00693 per share.

       7. On July 25, 1995, the Company issued and sold 496,028 shares of Series
    B Preferred Stock and a warrant  exercisable for 2,146,931  shares of Common
    Stock to a  director  of the  Company  for an  aggregate  purchase  price of
    $600,100.00. On March 18, 1996, the warrant was exercised for 715,649 shares
    of Common Stock for an aggregate purchase price of $50,000.  On May 6, 1996,
    the  warrant  was  exercised  for  286,258  shares  of  Common  Stock for an
    aggregate  purchase  price of $20,000,  and was then canceled  pursuant to a
    Warrant Amendment, Exercise and Termination Agreement.

       8. On August 8, 1996,  the Company  issued an aggregate of 692,520 shares
    of Common  Stock to two  directors  of the  Company in  connection  with the
    acquisition of TherAtid Incorporated by the Company.

       9. From  October 31, 1996 to December 31,  1996,  the Company  issued and
    sold 1,591  shares of Common  Stock to a director  of the  Company  upon the
    exercise of stock options at an exercise price of $0.23 per share,  pursuant
    to the Company's 1993 Incentive Stock Plan.

    The sales of the above securities were deemed to be exempt from registration
under the Securities  Act in reliance on Section 4(2) of the Securities  Act, or
Regulation D promulgated thereunder,  or Rule 701 promulgated under Section 3(b)
of the  Securities  Act as  transactions  by an issuer  not  involving  a public
offering or transactions  pursuant to  compensatory  benefit plans and contracts
relating to  compensation  as provided  under such Rule 701. The  recipients  of
securities in each such transaction  represented  their intention to acquire the
securities for investment  only and not with a view to or for sale in connection
with any distribution  thereof and appropriate legends were affixed to the share
certificates  and  warrants  issued in such  transactions.  All  recipients  had
adequate access,  through their  relationships with the Company,  to information
about the Registrant.

ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

(a) Exhibits


 EXHIBIT
   NO.                                            TITLE
   ---                                            -----
1.1    -- Form of Underwriting Agreement.
3.1    -- Amended and Restated Articles of Incorporation as currently in effect.
3.2    -- Form of Restated Certificate of Incorporation to be filed after the
          closing of this Offering made under this Registration Statement.
3.3    -- Bylaws of the Registrant as currently in effect.
3.4    -- Form of Bylaws of the Registrant to be effective upon the closing of
          this Offering made under this Registration Statement.
4.1*   -- Specimen Common Stock Certificate.
4.2*   -- Specimen Warrant Certificate.

                                      II-2


 EXHIBIT
   NO.                                            TITLE
   ---                                            -----
4.3*   -- Form of Representative's Warrant Agreement between the Registrant and 
          the Representative, including form of Representative's Warrant.
4.4*   -- Form of Warrant Agreement between the Registrant and Continental Stock
          Transfer and Trust Company, including form of Warrant.
5.1*   -- Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation.
10.1   -- Form of Indemnification Agreement for directors and officers.
10.2   -- 1993 Incentive Stock Plan.
10.3   -- 1997 Incentive Stock Plan and form of agreement thereunder.
10.4   -- Note Purchase Agreement between the Registrant and Hayden Leason
          dated May 6, 1996, and Promissory Note issued pursuant thereto.
10.5** -- License Agreement between the Registrant(as successor) and Ciba-Geigy,
          Ltd. dated April 4, 1996.
10.6** -- License Agreement between the Registrant and Eli Lilly and Company 
          dated June 15, 1994.
10.7** -- License Agreement between the Registrant and Research Corporation 
          Technologies, Inc., dated June 1, 1994.
10.8** -- License Agreement between the Registrant and Walter Reed Army 
          Institute of Research dated March 29, 1996.
10.9** -- Cooperative Research and Development Agreement between the Registrant
          and Walter Reed Army Institute of Research dated September 30, 1993 
          and revised March 7, 1995.
10.10  -- Employment agreement between the Registrant and Anthony E. Maida, III.
          dated November 20, 1994.
10.11  -- Employment Agreement between the Registrant and Dr. Lynn E. Spitler 
          dated November 20, 1994.
10.12  -- Employment Agreement between the Registrant and Thomas P.H. Twaddell,
          M.D. dated January 6, 1997.
10.13  -- First Amended and Restated Investors Rights Agreement dated July 25, 
          1995.
10.14  -- Lease agreement between the Registrant and Bay Business Centers, Inc. 
          dated August 13, 1996.
11.1   -- Statement of computation of net loss per share.
23.1   -- Consent of Wilson Sonsini Goodrich & Rosati, P.C. (See Exhibit 5.1).
23.2   -- Consent of Ernst & Young LLP, Independent Auditors
25.1   -- Power of Attorney (See page II-5).
27.1   -- Financial Data Schedule.

- ---------
 * To be filed by amendment.
** Confidential treatment requested.

    (b) Financial Statements

       (1) Financial Statements

    The financial  statements filed as part of this  Registration  Statement are
listed in the Index to Financial Statements of the Company on Page F-1.


                                      II-3


ITEM 17. UNDERTAKINGS.

    The undersigned Registrant hereby undertakes that:

       (a) It will  provide to the  Underwriters  at the closing as specified in
    the Underwriting Agreement certificates in such denominations and registered
    in such names as required by the  Underwriters  to permit prompt delivery to
    each purchaser.

       (b) Insofar as indemnification by the Registrant for liabilities  arising
    under  the  Securities  Act may be  permitted  to  directors,  officers  and
    controlling persons of the Registrant,  the Registrant has been advised that
    in  the  opinion  of  the   Securities   and   Exchange   Commission,   such
    indemnification  is against public policy as expressed in the Securities Act
    and  is,   therefore,   unenforceable.   In  the  event  that  a  claim  for
    indemnification  against  such  liabilities  (other  than the payment by the
    Registrant  of  expenses  incurred  or  paid  by  a  director,   officer  or
    controlling  person  of the  Registrant  in the  successful  defense  of any
    action,  suit or  proceeding)  is  asserted  by such  director,  officer  or
    controlling  person in connection with the securities being registered,  the
    Registrant  will,  unless in the  opinion  of  counsel  the  matter has been
    settled  by  controlling  precedent,   submit  to  a  court  of  appropriate
    jurisdiction  the  question  whether such  indemnification  by it is against
    public policy as expressed in the Securities Act and will be governed by the
    final adjudication of such issue.

       (c) For purposes of determining  any liability  under the Securities Act,
    the  information  omitted  from  the form of  prospectus  filed as part of a
    registration  statement in reliance upon Rule 430A and contained in the form
    of prospectus  filed by the Registrant  pursuant to Rule 424(b)(1) or (4) or
    497(h)  under  the  Securities  Act  shall  be  deemed  to be  part  of  the
    registration statement as of the time it was declared effective.

       (d) For the purpose of  determining  any liability  under the  Securities
    Act, each post-effective  amendment that contains a form of prospectus shall
    be deemed to be a new  registration  statement  relating  to the  securities
    offered  therein,  and the offering of such securities at that time shall be
    deemed to be the initial bona fide offering thereof.

    The undersigned Registrant hereby undertakes:

       (a) To file, during any period in which offers or sales are being made, a
    post-effective amendment to this Registration Statement:

           (i) to include any prospectus required by Section 10(a)(3) of
       the Securities Act;

           (ii) to reflect in the  prospectus  any facts or events arising after
       the  effective  date of the  Registration  Statement  (or the most recent
       post-effective   amendment   thereof)  which,   individually  or  in  the
       aggregate, represent a fundamental change in the information set forth in
       this Registration Statement.  Notwithstanding the foregoing, any increase
       or decrease in volume of  securities  offered (if the total dollar volume
       of securities offered would not exceed that which was registered) and any
       deviation  from the low or high  end of the  estimated  maximum  offering
       range  may  be  reflected  in the  form  of  prospectus  filed  with  the
       Commission  pursuant to Rule 424(b) if, in the aggregate,  the changes in
       volume  and  price  represent  no more than a 20%  change in the  maximum
       aggregate  offering price set forth in the  "Calculation  of Registration
       Fee" table in the effective registration statement;

           (iii) to include any material information with respect to the plan of
       distribution not previously  disclosed in the  Registration  Statement or
       any material change to such information in the Registration Statement;

       (b)  That,  for the  purpose  of  determining  any  liability  under  the
    Securities Act, each such  post-effective  amendment shall be deemed to be a
    new registration  statement relating to the securities offered therein,  and
    the  offering  of such  securities  at that  time  shall be deemed to be the
    initial bona fide Offering thereof;

       (c) To remove from  registration by means of a  post-effective  amendment
    any  of  the  securities   being  registered  which  remain  unsold  at  the
    termination of the offering.


                                      II-4


                                   SIGNATURES

    PURSUANT TO THE REQUIREMENTS OF THE ACT, THE REGISTRANT HAS DULY CAUSED THIS
REGISTRATION STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED,  THEREUNTO
DULY AUTHORIZED,  IN THE CITY OF SAN RAMON, STATE OF CALIFORNIA, ON FEBRUARY 14,
1997.

                                            JENNER TECHNOLOGIES, INC.


                                            By:  /s/ ANTHONY E. MAIDA, III
                                                 -------------------------
                                                   ANTHONY E. MAIDA, III,
                                                   CHIEF EXECUTIVE OFFICER

                             POWER OF ATTORNEY

    KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints, Anthony E. Maida, III and Lynn E. Spitler, M.D.,
and each of them acting  individually,  as his  attorney-in-fact,  each with the
power of  substitution,  for him in any and all capacities,  to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to sign any  registration  statement for the same  offering  covered by this
Registration  Statement  that is to be  effective  upon filing  pursuant to Rule
462(b)  promulgated  under the Securities  Act of 1933,  and all  post-effective
amendments  thereto,  and to file the same, with all exhibits  thereto and other
documents in connection therewith,  with the Securities and Exchange Commission,
granting unto said  attorneys-in-fact  and agents,  and each of them, full power
and  authority  to do and  perform  each and every act and thing  requisite  and
necessary  to be done in and about the  premises,  as fully to all  intents  and
purposes as he might or could do in person,  hereby ratifying and confirming all
that  such  attorneys-in-fact  and  agents  or any  of  them,  or  his or  their
substitute  or  substitutes,  may  lawfully  do or  cause  to be done by  virtue
thereof.

    PURSUANT TO THE  REQUIREMENTS  OF THE ACT, THIS  REGISTRATION  STATEMENT HAS
BEEN  SIGNED  BY THE  FOLLOWING  PERSONS  IN  THE  CAPACITIES  AND ON THE  DATES
INDICATED.


<TABLE>
<CAPTION>
             SIGNATURE                                    TITLE                                         DATE
             ---------                                    -----                                         ----
  <S>                                   <C>                                                       <C>
   /s/ ANTHONY E. MAIDA, III            Chief Executive Officer  and Director
- -------------------------------          (Principal Executive Officer)                            February 14, 1997
       ANTHONY E. MAIDA, III                                                   

   /s/ ANTHONY E. MAIDA, III           Chief Financial Officer (Principal
- -------------------------------          Financial and Accounting Officer)                        February 14,  1997
       ANTHONY E. MAIDA, III            

      /s/ LYNN E. SPITLER              President, Chief Scientific
- -------------------------------          Officer and Director                                     February 14,  1997
       LYNN E. SPITLER, M.D.            

        /s/ JACK BOWMAN
- ------------------------------- 
            JACK BOWMAN                  Director                                                 February 14,  1997

      /s/ LOWELL M. DICKE
- ------------------------------- 
          LOWELL M. DICKE                Director                                                 February 14,  1997

     /s/ ISAIAH J. FIDLER
- ------------------------------- 
  ISAIAH J. FIDLER, D.V.M., PH.D.        Director                                                 February 14,  1997

     /s/ ROBERT A. FILDES
- ------------------------------- 
      ROBERT A. FILDES, PH.D.            Director                                                 February 14,  1997

     /s/ HERBERT GROSSMAN
- ------------------------------- 
          HERBERT GROSSMAN               Director                                                 February 14,  1997

       /s/ HAYDEN LEASON
- ------------------------------- 
           HAYDEN LEASON                 Director                                                 February 14, 1997
</TABLE>



                                      II-5


                                                                                
                                                                                




                                                                     EXHIBIT 1.1


         [Form of Underwriting Agreement - Subject to Additional Review]


                        2,500,000 SHARES OF COMMON STOCK
                        AND 2,500,000 REDEEMABLE WARRANTS

                               JENNER TECHNOLOGIES

                             UNDERWRITING AGREEMENT


                                                              New York, New York
                                                                          , 1997


NATIONAL SECURITIES CORPORATION
  As Representative of the
  Several Underwriters listed on Schedule A hereto
1001 Fourth Avenue
Suite 2200
Seattle, Washington  98154

Ladies and Gentlemen:

        Jenner Technologies, a California corporation (the "Company"),  confirms
its agreement with National Securities Corporation  ("National") and each of the
underwriters named in Schedule A hereto (collectively, the "Underwriters," which
term shall also include any underwriter  substituted as hereinafter  provided in
Section 11), for whom National is acting as  representative  (in such  capacity,
National  shall  hereinafter  be referred to as "you" or the  "Representative"),
with  respect to the sale by the Company and the  purchase by the  Underwriters,
acting severally and not jointly, of the respective numbers of shares ("Shares")
of the Company's common stock,  $.001 par value per share ("Common Stock"),  and
redeemable common stock purchase warrants (the "Redeemable  Warrants"),  each to
purchase  one  share of  Common  Stock,  set forth in  Schedule  A  hereto.  The
aggregate 2,500,000 Shares and 2,500,000  Redeemable Warrants will be separately
tradeable  upon  issuance  and  are   hereinafter   referred  to  as  the  "Firm
Securities." Each Redeemable Warrant is exercisable commencing  on 







  ____________,  1998  [12  months  from  the  date  of  this  Agreement]  until
  ____________,  2002  [60  months  from  the  date of this  Agreement],  unless
  previously  redeemed by the Company,  at an initial exercise price of $_______
  [140% of the initial  public  offering  price] per share of Common Stock.  The
  Redeemable  Warrants may be redeemed by the Company at a  redemption  price of
  $.10 per Redeemable Warrant at any time after  _____________,  1998 [18 months
  from the date of this  Agreement] on thirty (30) days' prior  written  notice,
  provided  that the  closing  bid price of the Common  Stock  equals or exceeds
  $_______________  [160% of the initial public  offering price of Common Stock]
  per share,  for any twenty  (20)  trading  days within a period of thirty (30)
  consecutive  trading days ending on the fifth  trading day prior to the notice
  of redemption,  all in accordance with the terms and conditions of the Warrant
  Agreement (herein defined).

        Upon your request,  as provided in Section 2(b) of this  Agreement,  the
Company shall also issue and sell to the Underwriters,  acting severally and not
jointly,  up to an  additional  375,000  shares of Common Stock  and/or  375,000
Redeemable  Warrants for the purpose of covering  over-allotments,  if any. Such
375,000 shares of Common Stock and 375,000  Redeemable  Warrants are hereinafter
collectively to as the "Option  Securities."  The Company also proposes to issue
and sell to you  warrants  (the  "Representative's  Warrants")  pursuant  to the
Representative's  Warrant Agreement (the  "Representative's  Warrant Agreement")
for the purchase of an additional  250,000 shares of Common Stock and/or 250,000
Redeemable Warrants. The shares of Common Stock and Redeemable Warrants issuable
upon exercise of the  Representative's  Warrants are hereinafter  referred to as
the "Representative's  Securities." The Firm Securities,  the Option Securities,
the Representative's Warrants and the Representative's Securities (collectively,
hereinafter  referred to as the  "Securities")  are more fully  described in the
Registration Statement and the Prospectus referred to below.

        1. Representations and Warranties of the Company. The Company represents
and  warrants  to,  and agrees  with,  each of the  Underwriters  as of the date
hereof,  and as of the Closing  Date (as  hereinafter  defined)  and each Option
Closing Date (as hereinafter defined), if any, as follows:

              (a) The Company has  prepared  and filed with the  Securities  and
Exchange  Commission  (the  "Commission")  a  registration  statement,   and  an
amendment or amendments thereto, on Form S-1 (No. 333-_________),  including any
related preliminary prospectus ("Preliminary Prospectus"),  for the registration
of  the  Firm  Securities,   the  Option  Securities  and  the  Representative's
Securities  under the  Securities  Act of 1933,  as amended (the  "Act"),  which
registration  statement and  amendment or  amendments  have been prepared by the
Company  in  conformity  with the  requirements  of the Act,  and the  rules and
regulations  (the  "Regulations")  of the Commission  under the Act. The Company
will promptly  file a further  amendment to said  registration  statement in the
form  heretofore  delivered  to the  Underwriters  and will  not file any  other
amendment thereto to which the Underwriters shall have objected in writing after
having been furnished  with a copy thereof.  Except as the context may otherwise
require, such registration statement, as amended, on file with the Commission at
the time the registration statement becomes effective (including the prospectus,
financial  statements,  schedules,  exhibits and all other  documents filed as a
part  thereof  or  incorporated  therein  (including,  but not  limited to those
documents or information  incorporated by reference therein) and all information
deemed 


                                       2





to be a part thereof as of such time pursuant to paragraph (b) of Rule 430(A) of
the Regulations),  is hereinafter called the "Registration  Statement",  and the
form of prospectus in the form first filed with the Commission  pursuant to Rule
424(b) of the Regulations,  is hereinafter called the "Prospectus." For purposes
hereof,  "Rules and Regulations"  mean the rules and regulations  adopted by the
Commission  under  either the Act or the  Securities  Exchange  Act of 1934,  as
amended (the "Exchange Act"), as applicable.

              (b) Neither the Commission nor any state regulatory  authority has
issued any order preventing or suspending the use of any Preliminary Prospectus,
the  Registration  Statement  or  Prospectus  or any part of any  thereof and no
proceedings for a stop order  suspending the  effectiveness  of the Registration
Statement or any of the Company's securities have been instituted or are pending
or threatened.  Each of the Preliminary  Prospectus,  the Registration Statement
and Prospectus at the time of filing thereof  conformed with the requirements of
the Act and the Rules and Regulations,  and none of the Preliminary  Prospectus,
the Registration Statement or Prospectus at the time of filing thereof contained
an untrue  statement  of a material  fact or  omitted  to state a material  fact
required to be stated  therein or necessary to make the statements  therein,  in
light of the  circumstances  under which they were made, not misleading,  except
that this  representation  and  warranty  does not apply to  statements  made in
reliance  upon and in  conformity  with  written  information  furnished  to the
Company with  respect to the  Underwriters  by or on behalf of the  Underwriters
expressly  for use in such  Preliminary  Prospectus,  Registration  Statement or
Prospectus or any amendment thereof or supplement thereto.

              (c) When the Registration  Statement  becomes effective and at all
times  subsequent  thereto up to the Closing  Date (as defined  herein) and each
Option Closing Date (as defined  herein),  if any, and during such longer period
as the  Prospectus  may be required to be delivered in connection  with sales by
the Underwriters or a dealer, the Registration Statement and the Prospectus will
contain all  statements  which are required to be stated  therein in  accordance
with the Act and the Rules and Regulations, and will conform to the requirements
of the Act and the Rules and Regulations; neither the Registration Statement nor
the Prospectus, nor any amendment or supplement thereto, will contain any untrue
statement of a material  fact or omit to state any material  fact required to be
stated  therein or necessary  to make the  statements  therein,  in light of the
circumstances  under which they were made, not  misleading,  provided,  however,
that this  representation  and  warranty  does not apply to  statements  made or
statements  omitted in reliance upon and in strict  conformity with  information
furnished to the Company in writing by or on behalf of any Underwriter expressly
for use in the Preliminary  Prospectus,  Registration Statement or Prospectus or
any amendment thereof or supplement thereto.

              (d) Each of the Company, the Company's wholly-owned  subsidiaries,
_____________________  (such  subsidiaries  being the only subsidiaries that are
"significant  subsidiaries"  (as  defined in the Rules and  Regulations)  of the
Company,  are  hereinafter  referred  to  individually  as  a  "Subsidiary"  and
collectively  as the  "Subsidiaries"),  has been duly  organized  and is validly
existing as a corporation  in good  standing  under the laws of the state of its
incorporation.  Except as set forth in the  Prospectus,  none of the Company nor
the Subsidiaries owns an interest in any corporation,  partnership, trust, joint
venture or other business  entity.  Each of the Company and the  Subsidiaries is
duly  qualified  and licensed and in good standing


                                       3




as a foreign  corporation in each jurisdiction in which its ownership or leasing
of any properties or the character of its operations requires such qualification
or licensing.  The Company owns,  directly or  indirectly,  one hundred  percent
(100%) of the outstanding capital stock of each of the Subsidiaries,  and all of
such shares have been validly issued,  are fully paid and  non-assessable,  were
not issued in violation of any preemptive  rights,  and,  except as set forth in
the  Prospectus,  are  owned  free and  clear  of any  liens,  charges,  claims,
encumbrances,  pledges,  security  interests,  defects or other  restrictions or
equities of any kind  whatsoever.  Each of the Company and the  Subsidiaries has
all requisite  power and authority  (corporate and other),  and has obtained any
and all necessary  authorizations,  approvals,  orders, licenses,  certificates,
franchises and permits of and from all governmental or regulatory  officials and
bodies  (including,   without   limitation,   those  having   jurisdiction  over
environmental  or similar  matters),  to own or lease its properties and conduct
its  business  as  described  in the  Prospectus;  each of the  Company  and the
Subsidiaries  is and has  been  doing  business  in  compliance  with  all  such
authorizations,   approvals,  orders,  licenses,  certificates,  franchises  and
permits and all applicable  federal,  state,  local and foreign laws,  rules and
regulations;  and none of the  Company nor the  Subsidiaries  has  received  any
notice of  proceedings  relating to the revocation or  modification  of any such
authorization,  approval,  order,  license,  certificate,  franchise,  or permit
which,  singly or in the aggregate,  if the subject of an unfavorable  decision,
ruling  or  finding,  would  materially  and  adversely  affect  the  condition,
financial or otherwise, or the earnings, position,  prospects, value, operation,
properties,   business  or  results  of   operations   of  the  Company  or  the
Subsidiaries.  The  disclosures  in the  Registration  Statement  concerning the
effects of federal, state, local, and foreign laws, rules and regulations on the
Company's  and  the  Subsidiaries'  businesses  as  currently  conducted  and as
contemplated  are correct in all  material  respects  and do not omit to state a
material fact required to be stated  therein or necessary to make the statements
contained therein not misleading in light of the circumstances  under which they
were made.

              (e) The  Company  has a duly  authorized,  issued and  outstanding
capitalization  as  set  forth  in the  Prospectus  under  "Capitalization"  and
"Description of Securities" and will have the adjusted  capitalization set forth
therein on the Closing Date and each Option Closing Date, if any, based upon the
assumptions set forth therein, and the Company is not a party to or bound by any
instrument, agreement or other arrangement providing for it to issue any capital
stock, rights, warrants, options or other securities, except for this Agreement,
the Warrant Agreement,  the Representative's  Warrant Agreement and as described
in the Prospectus. The Securities and all other securities issued or issuable by
the Company conform or, when issued and paid for, will conform,  in all respects
to all statements with respect thereto  contained in the Registration  Statement
and the Prospectus.  All issued and  outstanding  securities of the Company have
been duly  authorized and validly  issued and are fully paid and  non-assessable
and the holders thereof have no rights of rescission with respect  thereto,  and
are not subject to personal liability by reason of being such holders;  and none
of such  securities  were issued in  violation of the  preemptive  rights of any
holders of any security of the Company or similar  contractual rights granted by
the Company. The Securities are not and will not be subject to any preemptive or
other similar rights of any  stockholder,  have been duly  authorized  and, when
issued,  paid for and  delivered in accordance  with the terms  hereof,  will be
validly  issued,   fully  paid  and  non-assessable  and  will  conform  to  the
description thereof contained in the Prospectus; the holders thereof will not be
subject to any liability  solely as such holders;  all corporate action required


                                       4





to be taken for the  authorization,  issue and sale of the  Securities  has been
duly and validly taken; and the certificates representing the Securities will be
in due and proper form.  Upon the  issuance  and delivery  pursuant to the terms
hereof of the Securities to be sold by the Company  hereunder,  the Underwriters
or the  Representative,  as the case may be, will  acquire  good and  marketable
title to such Securities free and clear of any lien, charge, claim, encumbrance,
pledge,  security  interest,  defect or other  restriction or equity of any kind
whatsoever.

              (f) The consolidated  financial  statements of the Company and the
Subsidiaries, together with the related notes and schedules thereto, included in
the  Registration  Statement,  each  Preliminary  Prospectus  and the Prospectus
fairly present the financial position,  income, changes in cash flow, changes in
stockholders'  equity  and the  results of  operations  of the  Company  and the
Subsidiaries  at the respective  dates and for the  respective  periods to which
they apply and such financial  statements  have been prepared in conformity with
generally  accepted  accounting   principles  and  the  Rules  and  Regulations,
consistently   applied  throughout  the  periods  involved  and  such  financial
statements  as are audited  have been  examined by Ernst & Young,  LLP,  who are
independent  certified public  accountants within the meaning of the Act and the
Rules and Regulations,  as indicated in their reports filed therewith. There has
been no adverse change or development  involving a prospective adverse change in
the condition,  financial or otherwise, or in the earnings, position, prospects,
value, operation,  properties, business, or results of operations of the Company
and the  Subsidiaries  taken as a whole,  whether or not arising in the ordinary
course of business,  since the date of the financial  statements included in the
Registration  Statement  and  the  Prospectus  and  the  outstanding  debt,  the
property, both tangible and intangible,  and the business of the Company and the
Subsidiaries,  conform in all  material  respects  to the  descriptions  thereof
contained  in  the   Registration   Statement  and  the  Prospectus.   Financial
information (including, without limitation, any pro forma financial information)
set forth in the Prospectus under the headings "Summary Financial  Information,"
"Selected  Consolidated  Financial Data,"  "Capitalization,"  and  "Management's
Discussion  and  Analysis of  Financial  Condition  and Results of  Operations,"
fairly present, on the basis stated in the Prospectus, the information set forth
therein,  and have been derived from or compiled on a basis consistent with that
of the audited financial statements included in the Prospectus; and, in the case
of pro  forma  financial  information,  if  any,  the  assumptions  used  in the
preparation  thereof  are  reasonable  and  the  adjustments  used  therein  are
appropriate to give effect to the  transactions  and  circumstances  referred to
therein.  The amounts shown as accrued for current and deferred income and other
taxes in such financial statements are sufficient for the payment of all accrued
and unpaid federal, state, local and foreign income taxes, interest,  penalties,
assessments  or  deficiencies  applicable  to the Company and the  Subsidiaries,
whether disputed or not, for the applicable  period then ended and periods prior
thereto;  adequate  allowance  for  doubtful  accounts  has  been  provided  for
unindemnified  losses due to the operations of the Company and the Subsidiaries;
and the statements of income do not contain any items of special or nonrecurring
income not earned in the ordinary course of business, except as specified in the
notes thereto.

              (g)  Each of the  Company  and the  Subsidiaries  (i) has paid all
federal, state, local, and foreign taxes for which it is liable,  including, but
not limited to,  withholding taxes and amounts payable under Chapters 21 through
24 of the  Internal  Revenue  Code of 1986,  as amended  (the  "Code"),  and has
furnished  all  information  returns it is required  to furnish  pursuant to the
Code,


                                       5






(ii) has  established  adequate  reserves  for such taxes  which are not due and
payable,  and (iii)  does not have any tax  deficiency  or  claims  outstanding,
proposed or assessed against it.

              (h) No transfer tax, stamp duty or other similar tax is payable by
or on behalf of the  Underwriters  in  connection  with (i) the  issuance by the
Company of the  Securities,  (ii) the purchase by the  Underwriters  of the Firm
Securities  and the Option  Securities  from the Company and the purchase by the
Representative  of the  Representative's  Warrants  from the Company,  (iii) the
consummation by the Company of any of its obligations  under this Agreement,  or
(iv) resales of the Firm Securities and the Option Securities in connection with
the distribution contemplated hereby.

              (i) Each of the Company and the Subsidiaries  maintains  insurance
policies,  including,  but not limited to, general  liability,  malpractice  and
property  insurance,  which insures each of the Company,  the  Subsidiaries  and
their  respective  employees,  against such losses and risks  generally  insured
against by comparable  businesses.  None of the Company nor the Subsidiaries (A)
has failed to give notice or present  any  insurance  claim with  respect to any
matter,  including  but not  limited  to the  Company's  business,  property  or
employees, under any insurance policy or surety bond in a due and timely manner,
(B) has any  disputes  or  claims  against  any  underwriter  of such  insurance
policies  or surety  bonds or has  failed to pay any  premiums  due and  payable
thereunder,  or (C) has failed to comply with all  conditions  contained in such
insurance policies and surety bonds.  There are no facts or circumstances  under
any such insurance  policy or surety bond which would relieve any insurer of its
obligation to satisfy in full any valid claim of the Company or any Subsidiary.

              (j) There is no action, suit,  proceeding,  inquiry,  arbitration,
investigation,   litigation  or  governmental  proceeding  (including,   without
limitation,  those having  jurisdiction over  environmental or similar matters),
domestic or foreign,  pending or threatened  against (or circumstances  that may
give rise to the same),  or involving the properties or business of, the Company
or the Subsidiaries which (i) questions the validity of the capital stock of the
Company, this Agreement,  the Warrant Agreement or the Representative's  Warrant
Agreement,  or of any action taken or to be taken by the Company  pursuant to or
in connection with this Agreement, the Warrant Agreement or the Representative's
Warrant  Agreement,  (ii)  is  required  to be  disclosed  in  the  Registration
Statement  which is not so disclosed (and such  proceedings as are summarized in
the Registration  Statement are accurately summarized in all material respects),
or (iii) might  materially  and  adversely  affect the  condition,  financial or
otherwise, or the earnings,  position,  prospects,  stockholders' equity, value,
operation,  properties, business or results of operations of the Company and the
Subsidiaries taken as a whole.

              (k) The  Company  has full legal  right,  power and  authority  to
authorize,  issue,  deliver and sell the Securities,  enter into this Agreement,
the  Warrant  Agreement  and  the  Representative's  Warrant  Agreement  and  to
consummate  the  transactions  provided  for  in  this  Agreement,  the  Warrant
Agreement and the Representative's  Warrant Agreement;  and this Agreement,  the
Warrant Agreement and the Representative's Warrant Agreement have each been duly
and properly  authorized,  executed and  delivered by the Company.  Each of this
Agreement,  the Warrant  Agreement and the  Representative's  Warrant  Agreement
constitutes  a legal,  valid and binding  agreement  of the Company  enforceable
against  the Company in  accordance  with its


                                       6





terms, and none of the Company's issue and sale of the Securities,  execution or
delivery  of this  Agreement,  the  Warrant  Agreement  or the  Representative's
Warrant Agreement, its performance hereunder and thereunder, its consummation of
the transactions contemplated herein and therein, or the conduct of its business
as described in the Registration Statement,  the Prospectus,  and any amendments
or supplements thereto,  conflicts with or will conflict with or results or will
result in any  breach or  violation  of any of the  terms or  provisions  of, or
constitutes  or will  constitute a default  under,  or result in the creation or
imposition of any lien, charge, claim,  encumbrance,  pledge, security interest,
defect or other  restriction or equity of any kind whatsoever upon, any property
or assets  (tangible or  intangible)  of any of the Company or the  Subsidiaries
pursuant to the terms of (i) the certificate of  incorporation or by-laws of any
of the  Company or the  Subsidiaries,  (ii) any  license,  contract,  collective
bargaining agreement,  indenture,  mortgage,  deed of trust, lease, voting trust
agreement,  stockholders agreement,  note, loan or credit agreement or any other
agreement or  instrument  to which any of the Company or the  Subsidiaries  is a
party or by which any of the Company or the  Subsidiaries  is or may be bound or
to which either of its or their  respective  properties  or assets  (tangible or
intangible)  is or may be subject,  or any  indebtedness,  or (iii) any statute,
judgment,  decree, order, rule or regulation applicable to any of the Company or
the  Subsidiaries of any arbitrator,  court,  regulatory body or  administrative
agency or other  governmental  agency or body  (including,  without  limitation,
those having  jurisdiction over  environmental or similar matters),  domestic or
foreign,  having jurisdiction over any of the Company or the Subsidiaries or any
of its or their respective activities or properties.

              (l) No consent, approval, authorization or order of, and no filing
with, any court,  regulatory body,  government agency or other body, domestic or
foreign,  is  required  for  the  issuance  of the  Securities  pursuant  to the
Prospectus and the  Registration  Statement,  the performance of this Agreement,
the  Warrant  Agreement  and  the  Representative's  Warrant  Agreement  and the
transactions contemplated hereby and thereby,  including without limitation, any
waiver of any  preemptive,  first  refusal  or other  rights  that any entity or
person may have for the issue and/or sale of any of the Securities,  except such
as have been or may be  obtained  under the Act or may be  required  under state
securities or Blue Sky laws in connection  with the  Underwriters'  purchase and
distribution  of  the  Firm  Securities  and  the  Option  Securities,  and  the
Representative's Warrants to be sold by the Company hereunder.

              (m) All  executed  agreements,  contracts  or other  documents  or
copies of executed agreements, contracts or other documents filed as exhibits to
the Registration  Statement to which any of the Company or the Subsidiaries is a
party or by which  it or they may be bound or to which  its or their  respective
assets,  properties  or  business  may be  subject  have been  duly and  validly
authorized,  executed and delivered by the Company or the  Subsidiaries,  as the
case may be, and  constitute  the legal,  valid and  binding  agreements  of the
Company or the  Subsidiaries,  as the case may be,  enforceable  against each of
them  in  accordance  with  their  respective  terms.  The  descriptions  in the
Registration Statement of agreements, contracts and other documents are accurate
and fairly present the information  required to be shown with respect thereto by
Form SB-2, and there are no contracts or other  documents  which are required by
the Act to be  described in the  Registration  Statement or filed as exhibits to
the Registration Statement which are not described or filed as required, and the
exhibits  which have been filed are complete and correct copies of the documents
of which they purport to be copies.


                                       7






              (n) Subsequent to the respective dates as of which  information is
set  forth in the  Registration  Statement  and  Prospectus,  and  except as may
otherwise be indicated or  contemplated  herein or therein,  none of the Company
nor the  Subsidiaries has (i) issued any securities or incurred any liability or
obligation,  direct or  contingent,  for borrowed  money,  (ii) entered into any
transaction other than in the ordinary course of business,  or (iii) declared or
paid any dividend or made any other distribution on or in respect of its capital
stock of any class,  and there has not been any change in the capital stock,  or
any change in the debt (long or short term) or liabilities  or material  adverse
change in or affecting the general affairs,  management,  financial  operations,
stockholders'  equity or  results  of  operations  of any of the  Company or the
Subsidiaries.

              (o) No default exists in the due performance and observance of any
term,  covenant or  condition of any license,  contract,  collective  bargaining
agreement,  indenture,  mortgage,  installment  sale agreement,  lease,  deed of
trust, voting trust agreement,  stockholders  agreement,  partnership agreement,
note,  loan or credit  agreement,  purchase  order,  or any other  agreement  or
instrument  evidencing an obligation for borrowed  money,  or any other material
agreement or  instrument  to which any of the Company or the  Subsidiaries  is a
party or by which  any of the  Company  or the  Subsidiaries  may be bound or to
which the property or assets  (tangible or  intangible) of any of the Company or
the Subsidiaries is subject or affected.

              (p) Each of the Company and the Subsidiaries has generally enjoyed
a  satisfactory  employer-employee  relationship  with its  employees  and is in
compliance  with all federal,  state,  local,  and foreign laws and  regulations
respecting  employment  and  employment  practices,   terms  and  conditions  of
employment and wages and hours.  There are no pending  investigations  involving
any of the Company or the  Subsidiaries by the U.S.  Department of Labor, or any
other  governmental  agency  responsible  for the  enforcement  of such federal,
state, local, or foreign laws and regulations. There is no unfair labor practice
charge or  complaint  against  any of the  Company or the  Subsidiaries  pending
before the National Labor  Relations  Board or any lockout,  strike,  picketing,
boycott,  dispute,  slowdown  or  stoppage  pending  or  threatened  against  or
involving any of the Company or the Subsidiaries, or any predecessor entity, and
none has  ever  occurred.  No  representation  question  exists  respecting  the
employees  of  any of  the  Company  or  the  Subsidiaries,  and  no  collective
bargaining  agreement or modification  thereof is currently being  negotiated by
any of the Company or the Subsidiaries.  No grievance or arbitration  proceeding
is pending under any expired or existing collective bargaining agreements of any
of the Company or the  Subsidiaries.  No labor dispute with the employees of any
of the Company or the Subsidiaries exists, or, is imminent.

              (q) None of the  Company  nor any of the  Subsidiaries  maintains,
sponsors or  contributes  to any  program or  arrangement  that is an  "employee
pension benefit plan," an "employee  welfare benefit plan," or a  "multiemployer
plan" as such terms are defined in Sections 3(2), 3(1) and 3(37),  respectively,
of the Employee  Retirement  Income  Security Act of 1974, as amended  ("ERISA")
("ERISA  Plans").  None  of  the  Company  nor  the  Subsidiaries  maintains  or
contributes,  now or at any time  previously,  to a  defined  benefit  plan,  as
defined  in  Section  3(35) of  ERISA.  No  ERISA  Plan  (or any  trust  created
thereunder)  has  engaged in a  "prohibited  transaction"  within the meaning of
Section  406 of ERISA or  Section  4975 of the Code,  which  could  subject  the
Company or the  Subsidiaries to any tax penalty on prohibited


                                       8




transactions and which has not adequately been corrected.  Each ERISA Plan is in
compliance with all reporting, disclosure and other requirements of the Code and
ERISA as they relate to any such ERISA  Plan.  Determination  letters  have been
received from the Internal Revenue Service with respect to each ERISA Plan which
is intended to comply with Code Section 401(a), stating that such ERISA Plan and
the  attendant  trust are  qualified  thereunder.  None of the  Company  nor the
Subsidiaries  has ever completely or partially  withdrawn from a  "multiemployer
plan."


              (r) None of the Company, the Subsidiaries, nor any of its or their
respective employees, directors,  stockholders,  partners, or affiliates (within
the meaning of the Rules and  Regulations)  of any of the foregoing has taken or
will  take,  directly  or  indirectly,  any  action  designed  to or  which  has
constituted or which might be expected to cause or result in, under the Exchange
Act, or otherwise, stabilization or manipulation of the price of any security of
the Company to facilitate the sale or resale of the Securities or otherwise.

              (s) Except as otherwise  disclosed in the Prospectus,  none of the
patents,  patent  applications,  trademarks,  service  marks,  trade  names  and
copyrights,  and licenses and rights to the foregoing presently owned or held by
any of the  Company or the  Subsidiaries,  are in dispute so far as known by the
Company  or are in any  conflict  with the right of any other  person or entity.
Each of the Company and the  Subsidiaries (i) owns or has the right to use, free
and  clear  of all  liens,  charges,  claims,  encumbrances,  pledges,  security
interests, defects or other restrictions or equities of any kind whatsoever, all
patents, trademarks,  service marks, trade names and copyrights,  technology and
licenses  and rights with respect to the  foregoing,  used in the conduct of its
business as now conducted or proposed to be conducted without infringing upon or
otherwise  acting  adversely  to the  right  or  claimed  right  of any  person,
corporation  or other entity under or with respect to any of the  foregoing  and
(ii) is not obligated or under any  liability  whatsoever to make any payment by
way of  royalties,  fees or  otherwise  to any  owner or  licensee  of, or other
claimant  to, any  patent,  trademark,  service  mark,  trade  name,  copyright,
know-how,  technology or other intangible asset, with respect to the use thereof
or in connection with the conduct of its business or otherwise.

              (t)  Each  of the  Company  and  the  Subsidiaries  has  good  and
marketable title to, or valid and enforceable leasehold estates in, all items of
real and personal property stated in the Prospectus to be owned or leased by it,
free and clear of all liens, charges, claims,  encumbrances,  pledges,  security
interests,  defects,  or other  restrictions or equities of any kind whatsoever,
other than those  referred to in the  Prospectus and liens for taxes not yet due
and payable.

              (u) Ernst & Young,  LLP, whose report is filed with the Commission
as a part  of the  Registration  Statement,  are  independent  certified  public
accountants as required by the Act and the Rules and Regulations.

              (v) The Company has caused to be duly executed legally binding and
enforceable  agreements  pursuant  to  which  each  of the  Company's  officers,
directors,  stockholders  and holders of securities  exchangeable or exercisable
for or convertible  into shares of Common Stock has agreed (i) not to,  directly
or indirectly,  issue, offer, offer to sell, sell, grant any option for


                                       9




the sale or purchase of,  assign,  transfer,  pledge,  hypothecate  or otherwise
encumber  or  dispose of any shares of Common  Stock or  securities  convertible
into,  exercisable  or  exchangeable  for or evidencing any right to purchase or
subscribe  for any shares of Common  Stock  (either  pursuant to Rule 144 of the
Rules and  Regulations  or  otherwise)  or  dispose of any  beneficial  interest
therein for a period of not less than twelve (12) months following the effective
date of the  Registration  Statement  without the prior  written  consent of the
Representative and the Company and (ii) to waive all rights to request or demand
the registration  pursuant to the Act of any securities of the Company which are
registered in the name of or beneficially  owned by any such holder.  During the
12 month period commencing on the effective date of the Registration  Statement,
the Company shall not, without the prior written consent of the  Representative,
sell, contract or offer to sell, issue, transfer, assign, pledge, distribute, or
otherwise dispose of, directly or indirectly,  any shares of Common Stock or any
options,  rights or warrants  with  respect to any shares of Common  Stock.  The
Company  will  cause the  Transfer  Agent (as  hereinafter  defined)  to mark an
appropriate  legend on the face of stock  certificates  representing all of such
securities and to place "stop transfer" orders on the Company's stock ledgers.

              (w) There are no  claims,  payments,  issuances,  arrangements  or
understandings,  whether  oral or  written,  for  services  in the  nature  of a
finder's or origination fee with respect to the sale of the Securities hereunder
or any other arrangements, agreements, understandings, payments or issuance with
respect to the  Company,  the  Subsidiaries,  or any of its or their  respective
officers, directors,  stockholders,  partners, employees or affiliates, that may
affect the Underwriters' compensation, as determined by the National Association
of Securities Dealers, Inc. ("NASD").

              (x) The  Common  Stock  has been  approved  for  quotation  on the
American Stock Exchange ("Amex").

              (y) None of the Company, the Subsidiaries, nor any of its or their
respective officers,  employees,  agents or any other person acting on behalf of
any of the Company or the  Subsidiaries  has,  directly or indirectly,  given or
agreed to give any  money,  gift or similar  benefit  (other  than  legal  price
concessions  to customers in the ordinary  course of business) to any  customer,
supplier,  employee or agent of a customer or supplier,  or official or employee
of any  governmental  agency  (domestic  or foreign) or  instrumentality  of any
government  (domestic or foreign) or any political party or candidate for office
(domestic  or foreign) or other  person who was,  is, or may be in a position to
help or hinder the business of any of the Company or the Subsidiaries (or assist
any of the Company or the Subsidiaries in connection with any actual or proposed
transaction) which (a) might subject any of the Company or the Subsidiaries,  or
any other  such  person to any  damage or  penalty  in any  civil,  criminal  or
governmental litigation or proceeding (domestic or foreign), (b) if not given in
the past,  might have had a material  adverse effect on the assets,  business or
operations of any of the Company or the Subsidiaries, or (c) if not continued in
the future, might adversely affect the assets, business, condition, financial or
otherwise, earnings, position, properties, value, operations or prospects of any
of the Company or the Subsidiaries. The Company's and each Subsidiary's internal
accounting  controls  are  sufficient  to  cause  each  of the  Company  and the
Subsidiaries  to comply  with the  Foreign  Corrupt  Practices  Act of 1977,  as
amended.


                                       10





              (z) Except as set forth in the Prospectus,  no officer,  director,
stockholder or partner of the Company or of any  Subsidiary,  or any "affiliate"
or  "associate"  (as these terms are defined in Rule 405  promulgated  under the
Rules and  Regulations)  of any of the foregoing  persons or entities has or has
had,  either  directly  or  indirectly,  (i) an interest in any person or entity
which (A) furnishes or sells services or products which are furnished or sold or
are proposed to be furnished or sold by any of the Company or the  Subsidiaries,
or (B)  purchases  from or  sells  or  furnishes  to any of the  Company  or the
Subsidiaries  any  goods or  services,  or (ii) a  beneficiary  interest  in any
contract or  agreement to which the Company or any  Subsidiary  is a party or by
which it may be bound or affected.  Except as set forth in the Prospectus  under
"Certain   Transactions,"  there  are  no  existing  agreements,   arrangements,
understandings   or   transactions,   or  proposed   agreements,   arrangements,
understandings or transactions,  between or among the Company or any Subsidiary,
and any officer, director, or 5% or greater securityholder of the Company or any
Subsidiary,  or any partner,  affiliate  or  associate  of any of the  foregoing
persons or entities.

              (aa) Any  certificate  signed by any officer of the Company or any
Subsidiary,  and delivered to the Underwriters or to  Underwriters'  Counsel (as
defined herein) shall be deemed a representation  and warranty by the Company to
the Underwriters as to the matters covered thereby.

              (ab) The minute books of each of the Company and the  Subsidiaries
have been made available to the  Underwriters  and contain a complete summary of
all meetings and actions of the  directors  (including  committees  thereof) and
stockholders of each of the Company and the Subsidiaries,  since the time of its
incorporation,  and  reflect  all  transactions  referred  to  in  such  minutes
accurately in all material respects.

              (ac)  Except and to the extent  described  in the  Prospectus,  no
holders of any  securities  of the Company or of any options,  warrants or other
convertible or exchangeable  securities of the Company have the right to include
any  securities  issued by the  Company  in the  Registration  Statement  or any
registration  statement  to be filed by the Company or to require the Company to
file a  registration  statement  under the Act and no person or entity holds any
anti-dilution rights with respect to any securities of the Company.

              (ad) The Company has as of the effective date of the  Registration
Statement  (i)  entered  into an  employment  agreement  with each of Anthony E.
Maida,  III and Lynn E.  Spitler,  M.D. in the form filed as Exhibit  ______ and
Exhibit __, respectively,  to the Registration Statement and (ii) purchased term
key person  insurance on the lives of each of Mr.  Maida and Dr.  Spitler in the
amount of $__ million which  policies  name the Company as the sole  beneficiary
thereof.

              (ae) As of the date  hereof,  the Company  does not have more than
_________  shares of Common Stock issued and outstanding  (including  securities
with  equivalent  rights as the Common Stock and shares of Common Stock, or such
equivalent securities,  issuable upon exercise of any and all options,  warrants
and other contract rights and securities convertible directly or indirectly into
shares  of Common  Stock or such  equivalent  securities,  but  excluding  up to
___________ shares of Common Stock issuable upon the exercise of options granted
under


                                       11





the  Company's  1996 Stock Option Plan at prices not less than the higher of the
market  value of the shares at the date of the grant or the  offering  price per
share).

              (af) Each of the Company and the  Subsidiaries  confirms as of the
date hereof that it is in compliance with all provisions of Section 1 of Laws of
Florida,  Chapter  92-198,  An Act Relating to Disclosure of Doing Business with
Cuba, and each of the Company and the Subsidiaries  further agrees that if it or
any affiliate commences engaging in business with the government of Cuba or with
any  person  or  affiliate  located  in Cuba  after  the date  the  Registration
Statement  becomes  or has  become  effective  with the  Commission  or with the
Florida Department of Banking and Finance (the "Department"),  whichever date is
later,  or if the  information  reported or  incorporated  by  reference  in the
Prospectus,   if  any,  concerning  the  Company's,   any  Subsidiary's  or  any
affiliate's,  business with Cuba or with any person or affiliate located in Cuba
changes in any material way, the Company will provide the  Department  notice of
such business or change, as appropriate, in a form acceptable to the Department.

              (ag) The  Company is not,  and upon the  issuance  and sale of the
Securities  as  herein  contemplated  and the  application  of the net  proceeds
therefrom  as described  in the  Prospectus  under the caption "Use of Proceeds"
will not be, an "investment company" or an entity "controlled" by an "investment
company" as such terms are  defined in the  Investment  Company Act of 1940,  as
amended (the "1940 Act").

              (ah) Each of the Company and the Subsidiaries maintain a system of
internal accounting controls sufficient to provide reasonable assurance that (i)
transactions  are executed in accordance with  management's  general or specific
authorizations;   (ii)   transactions   are  recorded  as  necessary  to  permit
preparations  of financial  statements in  conformity  with  generally  accepted
accounting principles and to maintain accountability for assets; (iii) access to
assets is permitted  only in accordance  with  management's  general or specific
authorizations; and (iv) the recorded accountability for assets is compared with
the existing assets at reasonable intervals and appropriate action is taken with
respect to any differences.

              (ai)  The   Company   has   entered   into  a  warrant   agreement
substantially  in the form filed as Exhibit ____ to the  Registration  Statement
(the "Warrant  Agreement") with Continental Stock Transfer and Trust Company, as
Warrant Agent, in form and substance  satisfactory to the  Representative,  with
respect  to the  Redeemable  Warrants  and  providing  for  the  payment  of the
commission contemplated by Section 4(v).

        2.    Purchase, Sale and Delivery of the Securities.

              (a) On the basis of the representations, warranties, covenants and
agreements herein contained,  but subject to the terms and conditions herein set
forth,  the Company agrees to sell to each  Underwriter,  and each  Underwriter,
severally  and not  jointly,  agrees to purchase  from the Company at a price of
$_______ [92% of the public  offering  price] per Share and $_______ [92% of the
public  offering price] per Redeemable  Warrant,  that number of Firm Securities
set forth in Schedule A opposite the name of such  Underwriter,  subject to such
adjustment as the  Representative in its sole discretion shall make to eliminate
any sales or purchases of fractional


                                       12




shares, plus any additional number of Firm Securities which such Underwriter may
become obligated to purchase pursuant to the provisions of Section 11 hereof.

              (b) In addition, on the basis of the representations,  warranties,
covenants  and  agreements  herein  contained,  but  subject  to the  terms  and
conditions  herein  set  forth,  the  Company  hereby  grants  an  option to the
Underwriters,  severally  and not  jointly,  to  purchase  all or any part of an
additional  375,000  shares  of  Common  Stock at a price of $ ____  [92% of the
public  offering  price] per share of Common Stock and/or an additional  375,000
Redeemable Warrants at a price of $______ [92% of the public offering price] per
Redeemable  Warrant.  The option granted hereby will expire forty-five (45) days
after (i) the date the Registration Statement becomes effective,  if the Company
has  elected not to rely on Rule 430A under the Rules and  Regulations,  or (ii)
the date of this  Agreement  if the  Company  has elected to rely upon Rule 430A
under the Rules and  Regulations,  and may be exercised in whole or in part from
time to time only for the purpose of covering  over-allotments which may be made
in connection  with the offering and  distribution  of the Firm  Securities upon
notice by the  Representative  to the Company setting forth the number of Option
Securities as to which the several  Underwriters  are then exercising the option
and the time and date of payment and  delivery  for any such Option  Securities.
Any  such  time  and  date of  delivery  (an  "Option  Closing  Date")  shall be
determined  by the  Representative,  but shall not be later  than three (3) full
business  days after the exercise of said option,  nor in any event prior to the
Closing  Date,  as  hereinafter  defined,  unless  otherwise  agreed upon by the
Representative  and the Company.  Nothing  herein  contained  shall obligate the
Underwriters  to  make  any  over-allotments.  No  Option  Securities  shall  be
delivered unless the Firm Securities shall be simultaneously  delivered or shall
theretofore have been delivered as herein provided.

              (c)  Payment  of  the   purchase   price  for,   and  delivery  of
certificates  for,  the  Firm  Securities  shall be made at the  offices  of the
Representative at 1001 Fourth Avenue, Suite 2200, Seattle,  Washington 98154, or
at such  other  place as  shall be  agreed  upon by the  Representative  and the
Company.  Such  delivery and payment  shall be made at 10:00 a.m. (New York City
time) on _______________, 1997 or at such other time and date as shall be agreed
upon by the Representative and the Company, but not less than three (3) nor more
than five (5) full business days after the  effective  date of the  Registration
Statement  (such time and date of payment and delivery  being herein  called the
"Closing  Date").  In  addition,  in the  event  that  any or all of the  Option
Securities are purchased by the Underwriters, payment of the purchase price for,
and delivery of certificates  for, such Option  Securities  shall be made at the
above-mentioned  office of the Representative or at such other place as shall be
agreed upon by the Representative and the Company on each Option Closing Date as
specified in the notice from the Representative to the Company.  Delivery of the
certificates for the Firm Securities and the Option Securities, if any, shall be
made to the Underwriters against payment by the Underwriters,  severally and not
jointly,  of  the  purchase  price  for  the  Firm  Securities  and  the  Option
Securities,  if any, to the order of the Company for the Firm Securities and the
Option  Securities,  if any, by New York Clearing House funds. In the event such
option is exercised, each of the Underwriters, acting severally and not jointly,
shall  purchase that  proportion of the total number of Option  Securities  then
being  purchased  which the number of Firm  Securities  set forth in  Schedule A
hereto opposite the name of such  Underwriter  bears to the total number of Firm
Securities,  subject in each case to such adjustments as the  Representative  in
its  discretion  shall make to eliminate  any 


                                       13





sales or purchases of fractional  shares.  Certificates  for the Firm Securities
and the Option  Securities,  if any,  shall be in definitive,  fully  registered
form, shall bear no restrictive  legends and shall be in such  denominations and
registered in such names as the Underwriters may request in writing at least two
(2) business days prior to the Closing Date or the relevant Option Closing Date,
as the case may be.  The  certificates  for the Firm  Securities  and the Option
Securities, if any, shall be made available to the Representative at such office
or such other place as the Representative may designate for inspection, checking
and  packaging  no later than 9:30 a.m.  on the last  business  day prior to the
Closing Date or the relevant Option Closing Date, as the case may be.

              (d) On the Closing  Date,  the Company shall issue and sell to the
Representative  Representative's  Warrants  at a  purchase  price of $.0001  per
warrant,  which  Representative's  Warrants shall entitle the holders thereof to
purchase  an  aggregate  of  250,000  shares  of  Common  Stock  and/or  250,000
Redeemable Warrants.  The  Representative's  Warrants shall be exercisable for a
period of four (4) years  commencing one (1) year from the effective date of the
Registration  Statement at a price  equaling one hundred forty percent (140%) of
the respective  initial  public  offering price of the Shares and the Redeemable
Warrants. The Representative's Warrant Agreement and form of Warrant Certificate
shall be  substantially  in the form filed as Exhibit [___] to the  Registration
Statement.  Payment  for  the  Representative's  Warrants  shall  be made on the
Closing Date.

        3. Public Offering of the Shares and Redeemable Warrants.  As soon after
the  Registration  Statement  becomes  effective  as  the  Representative  deems
advisable,  the  Underwriters  shall  make a public  offering  of the Shares and
Redeemable  Warrants (other than to residents of or in any jurisdiction in which
qualification  of the Shares and  Redeemable  Warrants is  required  and has not
become  effective)  at the  price  and upon the  other  terms  set  forth in the
Prospectus.  The  Representative  may from time to time increase or decrease the
respective public offering price after distribution of the Shares and Redeemable
Warrants has been  completed to such extent as the  Representative,  in its sole
discretion  deems  advisable.  The  Underwriters  may  enter  into  one of  more
agreements as the Underwriters, in each of their sole discretion, deem advisable
with one or more broker-dealers who shall act as dealers in connection with such
public offering.

              4. Covenants and Agreements of the Company.  The Company covenants
and agrees with each of the Underwriters as follows:

              (a)  The  Company   shall  use  its  best  efforts  to  cause  the
Registration  Statement  and any  amendments  thereto  to  become  effective  as
promptly as  practicable  and will not at any time,  whether before or after the
effective  date  of  the  Registration  Statement,  file  any  amendment  to the
Registration  Statement or  supplement  to the  Prospectus  or file any document
under the Act or Exchange Act before  termination  of the offering of the Shares
and Redeemable  Warrants by the Underwriters of which the  Representative  shall
not  previously  have been advised and  furnished  with a copy,  or to which the
Representative  shall have objected or which is not in compliance  with the Act,
the Exchange Act or the Rules and Regulations.


                                       14





              (b) As  soon  as the  Company  is  advised  or  obtains  knowledge
thereof,  the Company will advise the  Representative  and confirm the notice in
writing (i) when the Registration Statement,  as amended,  becomes effective, if
the provisions of Rule 430A promulgated  under the Act will be relied upon, when
the  Prospectus  has been filed in  accordance  with said Rule 430A and when any
post-effective  amendment to the Registration Statement becomes effective;  (ii)
of the issuance by the Commission of any stop order or of the initiation, or the
threatening,  of any proceeding suspending the effectiveness of the Registration
Statement  or any order  preventing  or  suspending  the use of the  Preliminary
Prospectus or the  Prospectus,  or any amendment or supplement  thereto,  or the
institution  of  proceedings  for that  purpose;  (iii) of the  issuance  by the
Commission  or by any state  securities  commission of any  proceedings  for the
suspension of the qualification of any of the Securities for offering or sale in
any jurisdiction or of the initiation, or the threatening, of any proceeding for
that purpose;  (iv) of the receipt of any comments from the Commission;  and (v)
of any request by the Commission for any amendment to the Registration Statement
or any amendment or supplement to the Prospectus or for additional  information.
If the Commission or any state securities commission shall enter a stop order or
suspend such  qualification  at any time,  the Company will make every effort to
obtain promptly the lifting of such order.

              (c) The Company shall file the  Prospectus  (in form and substance
satisfactory  to the  Representative)  or  transmit  the  Prospectus  by a means
reasonably  calculated to result in filing with the Commission  pursuant to Rule
424(b)(1) (or, if applicable and if consented to by the Representative, pursuant
to Rule  424(b)(4))  not later than the  Commission's  close of  business on the
earlier of (i) the second  business day  following the execution and delivery of
this  Agreement and (ii) the fifth  business day after the effective date of the
Registration Statement.

              (d)  The  Company  will  give  the  Representative  notice  of its
intention  to  file or  prepare  any  amendment  to the  Registration  Statement
(including any  post-effective  amendment) or any amendment or supplement to the
Prospectus  (including any revised prospectus which the Company proposes for use
by the  Underwriters  in connection  with the offering of the  Securities  which
differs from the corresponding  prospectus on file at the Commission at the time
the  Registration  Statement  becomes  effective,  whether  or not such  revised
prospectus  is  required  to be filed  pursuant  to Rule 424(b) of the Rules and
Regulations),  and will  furnish  the  Representative  with  copies  of any such
amendment  or  supplement  a  reasonable  amount of time prior to such  proposed
filing  or use,  as the case may be,  and will not file any such  prospectus  to
which the Representative or Orrick,  Herrington & Sutcliffe LLP  ("Underwriters'
Counsel") shall object.

              (e) The Company shall endeavor in good faith, in cooperation  with
the Representative,  at or prior to the time the Registration  Statement becomes
effective,  to qualify the Securities for offering and sale under the securities
laws of such  jurisdictions  as the  Representative  may designate to permit the
continuance  of sales and  dealings  therein for as long as may be  necessary to
complete the distribution, and shall make such applications, file such documents
and furnish  such  information  as may be required for such  purpose;  provided,
however,  the Company shall not be required to qualify as a foreign  corporation
or file a  general  or  limited  consent  to  service  of  process  in any  such
jurisdiction.  In each jurisdiction where such qualification  shall be effected,
the Company will,  unless the  Representative  agrees that such action is not at
the time


                                       15




necessary  or  advisable,  use all  reasonable  efforts  to file and  make  such
statements or reports at such times as are or may  reasonably be required by the
laws of such jurisdiction to continue such qualification.

              (f) During the time when a prospectus  is required to be delivered
under the Act, the Company shall use all  reasonable  efforts to comply with all
requirements  imposed  upon  it by the  Act and  the  Exchange  Act,  as now and
hereafter  amended  and by the  Rules and  Regulations,  as from time to time in
force,  so far as necessary to permit the continuance of sales of or dealings in
the Securities in accordance with the provisions  hereof and the Prospectus,  or
any amendments or supplements thereto. If at any time when a prospectus relating
to the  Securities  is required to be  delivered  under the Act, any event shall
have occurred as a result of which, in the opinion of counsel for the Company or
Underwriters' Counsel, the Prospectus, as then amended or supplemented, includes
an untrue  statement  of a  material  fact or omits to state any  material  fact
required to be stated  therein or necessary to make the statements  therein,  in
the light of the circumstances under which they were made, not misleading, or if
it is necessary at any time to amend the  Prospectus to comply with the Act, the
Company  will notify the  Representative  promptly and prepare and file with the
Commission an appropriate  amendment or supplement in accordance with Section 10
of  the  Act,  each  such  amendment  or  supplement  to  be   satisfactory   to
Underwriters'  Counsel,  and the Company will furnish to the Underwriters copies
of such  amendment or supplement as soon as available and in such  quantities as
the Underwriters may request.

              (g) As  soon as  practicable,  but in any  event  not  later  than
forty-five (45) days after the end of the 12-month  period  beginning on the day
after the end of the fiscal  quarter of the Company  during which the  effective
date of the  Registration  Statement  occurs (ninety (90) days in the event that
the end of such fiscal  quarter is the end of the Company's  fiscal  year),  the
Company shall make generally  available to its security  holders,  in the manner
specified   in  Rule   158(b)  of  the  Rules  and   Regulations,   and  to  the
Representative,  an earnings  statement which will be in the detail required by,
and will  otherwise  comply with, the provisions of Section 11(a) of the Act and
Rule 158(a) of the Rules and  Regulations,  which  statement need not be audited
unless  required  by  the  Act,  covering  a  period  of at  least  twelve  (12)
consecutive months after the effective date of the Registration Statement.

              (h) During a period of seven (7) years after the date hereof,  the
Company will furnish to its stockholders, as soon as practicable, annual reports
(including  financial  statements audited by independent public accountants) and
unaudited quarterly reports of earnings, and will deliver to the Representative:

              i.  concurrently  with  furnishing  such quarterly  reports to its
        stockholders,  statements  of income of the Company for each  quarter in
        the form  furnished to the Company's  stockholders  and certified by the
        Company's principal financial or accounting officer;

              ii.  concurrently  with  furnishing  such  annual  reports  to its
        stockholders,  a  balance  sheet  of the  Company  as at the  end of the
        preceding   fiscal  year,   together  with   statements  of  operations,
        stockholders'  equity,  and cash flows of the  Company  for such  fiscal
        year, 


                                       16





        accompanied  by  a  copy  of  the  certificate  thereon  of  independent
        certified public accountants;

              iii.  as  soon  as  they  are  available,  copies  of all  reports
        (financial or other) mailed to stockholders;

              iv.  as soon as they are  available,  copies  of all  reports  and
        financial statements furnished to or filed with the Commission, the NASD
        or any securities exchange;

              v. every press release and every  material news item or article of
        interest to the  financial  community in respect of the Company,  or its
        affairs,  which was released or prepared by or on behalf of the Company;
        and

              vi. any additional  information of a public nature  concerning the
        Company  (and  any  future  subsidiary)  or  its  businesses  which  the
        Representative may request.

        During such seven-year  period, if the Company has an active subsidiary,
the foregoing financial statements will be on a consolidated basis to the extent
that the accounts of the Company and its subsidiary(ies)  are consolidated,  and
will  be  accompanied  by  similar  financial  statements  for  any  significant
subsidiary which is not so consolidated.

              (i) The Company will  maintain a transfer  agent and warrant agent
("Transfer  Agent") and, if necessary under the jurisdiction of incorporation of
the Company,  a Registrar  (which may be the same entity as the Transfer  Agent)
for its Common Stock and Redeemable Warrants.

              (j) The  Company  will  furnish  to the  Representative  or on the
Representative's  order, without charge, at such place as the Representative may
designate, copies of each Preliminary Prospectus, the Registration Statement and
any pre-effective or post-effective amendments thereto (two of which copies will
be  signed  and  will  include  all  financial  statements  and  exhibits),  the
Prospectus, and all amendments and supplements thereto, including any prospectus
prepared after the effective date of the Registration Statement, in each case as
soon as available and in such quantities as the Representative may request.

              (k) On or before the effective date of the Registration Statement,
the Company shall provide the  Representative  with true original copies of duly
executed,  legally binding and enforceable  agreements  pursuant to which, for a
period  of  twelve  (12)  months  from the  effective  date of the  Registration
Statement,  each  of  the  Company's  stockholders  and  holders  of  securities
exchangeable  or  exercisable  for or  convertible  into shares of Common  Stock
agrees that it or he or she (i) will not, directly or indirectly,  issue,  offer
to sell,  sell,  grant an option for the sale or purchase of, assign,  transfer,
pledge,  hypothecate  or  otherwise  encumber or dispose of any shares of Common
Stock  or  securities  convertible  into,  exercisable  or  exchangeable  for or
evidencing  any right to purchase or  subscribe  for any shares of Common  Stock
(either  pursuant  to Rule 144 of the Rules and  Regulations  or  otherwise)  or
dispose of any  beneficial  interest  therein  without the prior  consent of the
Representative (collectively,  the "Lock-up Agreements") and (ii) waives, during
such 12 month period,  any and all rights to request or demand the  registration
pursuant to the Act, of any  securities of the Company  which are  registered in
the


                                       17





name of or beneficially  owned by it or he or she,  respectively.  During the 12
month period commencing on the effective date of the Registration Statement, the
Company  shall not,  without the prior  written  consent of the  Representative,
sell, contract or offer to sell, issue, transfer, assign, pledge, distribute, or
otherwise dispose of, directly or indirectly,  any shares of Common Stock or any
options,  rights or warrants with respect to any shares of Common  Stock.  On or
before the Closing Date, the Company shall deliver  instructions to the Transfer
Agent  authorizing  it  to  place   appropriate   legends  on  the  certificates
representing  the  securities  subject to the  Lock-up  Agreements  and to place
appropriate stop transfer orders on the Company's ledgers.

              (l) None of the Company, the Subsidiaries, nor any of its or their
respective officers, directors, stockholders, nor any of its or their respective
affiliates (within the meaning of the Rules and Regulations) will take, directly
or indirectly,  any action designed to, or which might in the future  reasonably
be expected to cause or result in, stabilization or manipulation of the price of
any securities of the Company.

              (m) The Company  shall apply the net proceeds from the sale of the
Securities in the manner, and subject to the conditions, set forth under "Use of
Proceeds"  in the  Prospectus.  No  portion  of the net  proceeds  will be used,
directly or indirectly, to acquire any securities issued by the Company.

              (n) The Company shall timely file all such reports, forms or other
documents as may be required (including, but not limited to, a Form SR as may be
required  pursuant to Rule 463 under the Act) from time to time,  under the Act,
the Exchange Act, and the Rules and Regulations, and all such reports, forms and
documents  filed  will  comply  as to form and  substance  with  the  applicable
requirements under the Act, the Exchange Act, and the Rules and Regulations.

              (o) The Company  shall furnish to the  Representative  as early as
practicable  prior to each of the date hereof,  the Closing Date and each Option
Closing  Date,  if any,  but no  later  than two (2) full  business  days  prior
thereto, a copy of the latest available  unaudited interim financial  statements
of the  Company  (which in no event  shall be as of a date more than thirty (30)
days prior to the date of the  Registration  Statement)  which have been read by
the Company's  independent public accountants,  as stated in their letters to be
furnished pursuant to Sections 6(l) and 6(m) hereof.

              (p) The  Company  shall  cause the  Common  Stock  and  Redeemable
Warrants  to be quoted on Nasdaq  and,  for a period of seven (7) years from the
date hereof, use its best efforts to maintain the Nasdaq quotation of the Common
Stock and the Redeemable Warrants to the extent outstanding.

              (q) For a period  of five (5) years  from the  Closing  Date,  the
Company shall furnish to the  Representative at the Company's sole expense,  (i)
daily  consolidated  transfer sheets relating to the Common Stock and Redeemable
Warrants (ii) the list of holders of all of the Company's securities and (iii) a
Blue Sky  "Trading  Survey"  for  secondary  sales of the  Company's  securities
prepared by counsel to the Company.


                                       18





              (r) As soon as practicable, (i) but in no event more than five (5)
business days before the effective date of the  Registration  Statement,  file a
Form 8-A with the Commission  providing for the registration  under the Exchange
Act of the  Securities and (ii) but in no event more than thirty (30) days after
the  effective  date of the  Registration  Statement,  take  all  necessary  and
appropriate   actions  to  be  included  in  Standard  and  Poor's   Corporation
Descriptions  and Moody's OTC Manual and to continue such inclusion for a period
of not less than seven (7) years.

              (s) The Company  hereby  agrees that it will not,  for a period of
twelve (12) months from the effective date of the Registration Statement, adopt,
propose to adopt or otherwise permit to exist any employee,  officer,  director,
consultant or compensation plan or similar arrangement permitting (i) the grant,
issue,  sale or entry into any  agreement  to grant,  issue or sell any  option,
warrant or other  contract  right (x) at an exercise price that is less than the
greater of the public offering price of the Shares set forth herein and the fair
market  value  on the  date of  grant  or  sale  or (y) to any of its  executive
officers or directors or to any holder of 5% or more of the Common Stock, except
as provided in subsection (ii) of this subparagraph;  (ii) the maximum number of
shares of Common Stock or other  securities  of the Company  purchasable  at any
time  pursuant  to  options  or  warrants  issued by the  Company  to exceed the
aggregate  _______ shares reserved for future issuance under the Company's Stock
Option  Plans  described in footnote  one (1) to the  "Prospectus  Summary - The
Offering" section of the Prospectus;  (iii) the payment for such securities with
any form of  consideration  other  than  cash;  or (iv) the  existence  of stock
appreciation rights, phantom options or similar arrangements.

              (t) Until the completion of the  distribution  of the  Securities,
the Company shall not,  without the prior written consent of the  Representative
and Underwriters' Counsel,  issue, directly or indirectly,  any press release or
other  communication or hold any press conference with respect to the Company or
its activities or the offering  contemplated  hereby,  other than trade releases
issued in the ordinary  course of the Company's  business  consistent  with past
practices with respect to the Company's operations.

              (u) For a period  equal to the  lesser of (i) seven (7) years from
the  date  hereof,  and  (ii) the  sale to the  public  of the  Representative's
Securities, the Company will not take any action or actions which may prevent or
disqualify  the Company's use of Form SB-2 (or other  appropriate  form) for the
registration  under  the Act of the  Representative's  Securities.  The  Company
further agrees to use its best efforts to file such post-effective amendments to
the  Registration  Statement,  as may be  necessary,  in order to  maintain  its
effectiveness and to keep such Registration Statement effective while any of the
Redeemable Warrants or Representative's Warrants remain outstanding.

              (v) Commencing  one year and one day from the date hereof,  if the
Company engages the  Representative  as a warrant  solicitation  agent under the
terms of the Warrant  Agreement,  the  Company  shall pay the  Representative  a
commission  equal to five percent (5%) of the exercise  price of the  Redeemable
Warrants,  payable on the date of the exercise  thereof on the terms provided in
the Warrant Agreement;  provided,  however, the Representative shall be entitled
to receive the  commission  contemplated  by this  Section 4(x) only if: (i) the
Representative  has provided actual services in connection with the solicitation
of the  exercise  of a  Redeemable  Warrant  by a  Warrantholder  and  (ii)  the
Warrantholder  exercising  a  Redeemable 


                                       19






Warrant affirmatively  designates in writing on the exercise form on the reverse
side  of  the  Redeemable   Warrant   Certificate  that  the  exercise  of  such
Warrantholder's Redeemable Warrant was solicited by the Representative.

        5.    Payment of Expenses.

              (a) The Company  hereby  agrees to pay on each of the Closing Date
and the Option  Closing  Date (to the extent not paid at the  Closing  Date) all
expenses and fees (other than fees of Underwriters' Counsel,  except as provided
in (iv) below)  incident to the  performance  of the  obligations of the Company
under this Agreement,  the Warrant  Agreement and the  Representative's  Warrant
Agreement,   including,  without  limitation,  (i)  the  fees  and  expenses  of
accountants and counsel for the Company, (ii) all costs and expenses incurred in
connection with the preparation,  duplication,  printing  (including mailing and
handling  charges),  filing,  delivery  and  mailing  (including  the payment of
postage with respect thereto) of the  Registration  Statement and the Prospectus
and any amendments and supplements thereto and the printing,  mailing (including
the payment of postage with respect thereto) and delivery of this Agreement, the
Warrant Agreement,  the Representative's  Warrant Agreement, the Agreement Among
Underwriters,  the Selected Dealer Agreements, and related documents,  including
the cost of all copies thereof and of the  Preliminary  Prospectuses  and of the
Prospectus and any amendments  thereof or  supplements  thereto  supplied to the
Underwriters and such dealers as the Underwriters may request,  in quantities as
hereinabove stated, (iii) the printing,  engraving, issuance and delivery of the
Securities  including,  but not limited to, (x) the purchase by the Underwriters
of the  Firm  Securities  and the  Option  Securities  and the  purchase  by the
Representative  of the  Representative's  Warrants  from  the  Company,  (y) the
consummation by the Company of any of its obligations under this Agreement,  the
Warrant Agreement and the Representative's  Warrant Agreement, and (z) resale of
the Firm Securities and the Option  Securities by the Underwriters in connection
with  the  distribution  contemplated  hereby,  (iv)  the  qualification  of the
Securities   under  state  or  foreign   securities   or  "Blue  Sky"  laws  and
determination  of the status of such  securities  under legal  investment  laws,
including  the  costs  of  printing  and  mailing  the  "Preliminary   Blue  Sky
Memorandum",  the  "Supplemental  Blue Sky  Memorandum"  and "Legal  Investments
Survey," if any, and disbursements and fees of counsel in connection  therewith,
(v)  advertising  costs and  expenses,  including  but not  limited to costs and
expenses  in  connection  with  the  "road  show",   information   meetings  and
presentations,   bound  volumes  and  prospectus  memorabilia  and  "tomb-stone"
advertisement expenses, (vi) costs and expenses in connection with due diligence
investigations,  including  but  not  limited  to the  fees  of any  independent
counsel, expert or consultant retained,  (vii) fees and expenses of the Transfer
Agent  and  registrar  and  all  issue  and  transfer   taxes,  if  any,  (viii)
applications  for assignment of a rating of the  Securities by qualified  rating
agencies, (ix) the fees payable to the Commission and the NASD, and (x) the fees
and expenses  incurred in  connection  with the  quotation of the  Securities on
Nasdaq and any other exchange.

              (b)  If  this  Agreement  is  terminated  by the  Underwriters  in
accordance  with the  provisions  of Section 6 or Section 12, the Company  shall
reimburse and indemnify the Underwriters  for all of their actual  out-of-pocket
expenses,  including the fees and disbursements of Underwriters'  Counsel,  less
any amounts already paid pursuant to Section 5(c) hereof.


                                       20





              (c) The Company  further  agrees that, in addition to the expenses
payable  pursuant  to  subsection  (a) of this  Section  5,  it will  pay to the
Representative  on the Closing Date by certified or bank cashier's  check or, at
the  election  of the  Representative,  by  deduction  from the  proceeds of the
offering contemplated herein a non-accountable expense allowance of $500,000.

        6. Conditions of the Underwriters'  Obligations.  The obligations of the
Underwriters  hereunder  shall be  subject  to the  continuing  accuracy  of the
representations  and  warranties of the Company herein as of the date hereof and
as of the Closing Date and each Option Closing Date, if any, as if they had been
made on and as of the Closing Date or each Option  Closing Date, as the case may
be; the accuracy on and as of the Closing Date or Option  Closing  Date, if any,
of the statements of the officers of the Company made pursuant to the provisions
hereof;  and the  performance  by the Company on and as of the Closing  Date and
each Option Closing Date, if any, of its covenants and obligations hereunder and
to the following further conditions:

              (a) The  Registration  Statement  shall have become  effective not
later than 12:00  P.M.,  New York time,  on the date of this  Agreement  or such
later date and time as shall be consented  to in writing by the  Representative,
and, at the Closing  Date and each Option  Closing  Date,  if any, no stop order
suspending  the  effectiveness  of the  Registration  Statement  shall have been
issued and no proceedings  for that purpose shall have been  instituted or shall
be pending or  contemplated by the Commission and any request on the part of the
Commission  for  additional  information  shall have been  complied  with to the
reasonable  satisfaction of Underwriters' Counsel. If the Company has elected to
rely upon Rule 430A of the Rules and  Regulations,  the price of the  Shares and
Redeemable  Warrants and any price-related  information  previously omitted from
the effective  Registration Statement pursuant to such Rule 430A shall have been
transmitted to the  Commission  for filing  pursuant to Rule 424(b) of the Rules
and  Regulations  within the  prescribed  time period and,  prior to the Closing
Date,   the  Company  shall  have   provided   evidence   satisfactory   to  the
Representative  of such timely filing, or a post-effective  amendment  providing
such  information  shall have been  promptly  filed and  declared  effective  in
accordance with the requirements of Rule 430A of the Rules and Regulations.

              (b) The Representative shall not have advised the Company that the
Registration Statement,  or any amendment thereto,  contains an untrue statement
of fact which, in the Representative's opinion, is material, or omits to state a
fact which, in the  Representative's  opinion, is material and is required to be
stated therein or is necessary to make the statements therein not misleading, or
that the Prospectus,  or any supplement thereto, contains an untrue statement of
fact which, in the  Representative's  opinion, is material,  or omits to state a
fact which, in the  Representative's  opinion, is material and is required to be
stated therein or is necessary to make the statements  therein,  in light of the
circumstances under which they were made, not misleading.

              (c) On or  prior  to each of the  Closing  Date  and  each  Option
Closing Date, if any, the Representative  shall have received from Underwriters'
Counsel,  such  opinion or  opinions  with  respect to the  organization  of the
Company,  the  validity  of the  Securities,  the  Registration  Statement,  the
Prospectus  and other  related  matters as the  Representative  may  request and
Underwriters'  Counsel shall have received such papers and  information  as they
request to enable them to pass upon such matters.


                                       21





              (d) At the Closing Date, the Underwriters  shall have received the
favorable  opinion of Wilson Sonsini  Goodrich & Rosati,  counsel to the Company
and the Subsidiaries,  dated the Closing Date, addressed to the Underwriters and
in form and substance satisfactory to Underwriters' Counsel, to the effect that:

              i.  each of the  Company  and the  Subsidiaries  (A) has been duly
        organized  and is validly  existing as a  corporation  in good  standing
        under the laws of its  jurisdiction,  (B) is duly qualified and licensed
        and in good standing as a foreign  corporation in each  jurisdiction  in
        which its ownership or leasing of any properties or the character of its
        operations  requires such  qualification  or licensing,  and (C) has all
        requisite  corporate  power and authority,  and has obtained any and all
        necessary  authorizations,  approvals,  orders, licenses,  certificates,
        franchises  and  permits  of and from  all  governmental  or  regulatory
        officials  and  bodies  (including,  without  limitation,  those  having
        jurisdiction over environmental or similar matters), to own or lease its
        properties and conduct its business as described in the Prospectus; each
        of the Company and the  Subsidiaries  is and has been doing  business in
        compliance with all such authorizations,  approvals,  orders,  licenses,
        certificates,  franchises  and permits and all federal,  state and local
        laws,  rules  and  regulations;   and,  none  of  the  Company  nor  the
        Subsidiaries  has  received  any notice of  proceedings  relating to the
        revocation or modification of any such authorization,  approval,  order,
        license,  certificate,  franchise,  or  permit  which,  singly or in the
        aggregate, if the subject of an unfavorable decision, ruling or finding,
        would materially adversely affect the business,  operations,  condition,
        financial or otherwise,  or the earnings,  business  affairs,  position,
        prospects,  value,  operation,   properties,   business  or  results  of
        operations  of the  Company  and the  Subsidiaries  taken as whole.  The
        disclosures  in the  Registration  Statement  concerning  the effects of
        federal,  state and local  laws,  rules and  regulations  on each of the
        Company's and the Subsidiaries' businesses as currently conducted and as
        contemplated  are correct in all  material  respects  and do not omit to
        state a fact  required  to be stated  therein or  necessary  to make the
        statements   contained   therein   not   misleading   in  light  of  the
        circumstances in which they were made.

              ii. The Company owns, directly or indirectly,  one hundred percent
        (100%) of the outstanding capital stock of each of the Subsidiaries, and
        all  such  shares  have  been  validly   issued,   are  fully  paid  and
        non-assessable,  were not issued in violation of any  preemptive  rights
        and  are  owned   free  and  clear  of  any  liens,   charges,   claims,
        encumbrances, pledges, security interests, defects or other restrictions
        or equities of any kind whatsoever;

              iii.  except as described in the  Prospectus,  none of the Company
        nor  the  Subsidiaries  owns  an  interest  in  any  other  corporation,
        partnership, joint venture, trust or other business entity;

              iv. the  Company  has a duly  authorized,  issued and  outstanding
        capitalization  as set forth in the  Prospectus,  and any  amendment  or
        supplement  thereto,  under  "CAPITALIZATION",  and the Company is not a
        party to or  bound by any  instrument,  agreement  or other  arrangement
        providing  for it to issue,  sell,  transfer,  purchase  or  redeem  any
        capital stock, rights, warrants, options or other securities, except for
        this Agreement,  the Warrant Agreement and the Representative's  Warrant
        Agreement and as 


                                       22




        described in the  Prospectus.  The Securities  and all other  securities
        issued or issuable by the Company  conform in all  material  respects to
        all  statements  with  respect  thereto  contained  in the  Registration
        Statement and the Prospectus.  All issued and outstanding  securities of
        the Company have been duly  authorized  and validly issued and are fully
        paid  and  non-assessable;   the  holders  thereof  have  no  rights  of
        rescission  with  respect  thereto,  and are  not  subject  to  personal
        liability by reason of being such holders;  and none of such  securities
        were issued in violation of the preemptive  rights of any holders of any
        security of the Company or any similar  rights  granted by the  Company.
        The Securities to be sold by the Company hereunder and under the Warrant
        Agreement and the  Representative's  Warrant  Agreement are not and will
        not  be  subject  to any  preemptive  or  other  similar  rights  of any
        stockholder,  have been duly authorized  and, when issued,  paid for and
        delivered in accordance  with the terms hereof,  will be validly issued,
        fully paid and  non-assessable  and conform to the  description  thereof
        contained in the Prospectus;  the holders thereof will not be subject to
        any liability  solely as such holders;  all corporate action required to
        be taken for the  authorization,  issue and sale of the  Securities  has
        been duly and  validly  taken;  and the  certificates  representing  the
        Securities are in due and proper form. The Representative's Warrants and
        the Redeemable  Warrants constitute valid and binding obligations of the
        Company to issue and sell, upon exercise  thereof and payment  therefor,
        the number and type of  securities  of the Company  called for  thereby.
        Upon the issuance and  delivery  pursuant to this  Agreement of the Firm
        Securities and the Option Securities and the  Representative's  Warrants
        to be sold by the  Company,  the  Underwriters  and the  Representative,
        respectively,  will  acquire  good  and  marketable  title  to the  Firm
        Securities and the Option Securities and the  Representative's  Warrants
        free and clear of any pledge, lien, charge, claim, encumbrance,  pledge,
        security   interest,   or  other  restriction  or  equity  of  any  kind
        whatsoever.  No  transfer  tax  is  payable  by  or  on  behalf  of  the
        Underwriters  in connection  with (A) the issuance by the Company of the
        Securities,  (B) the purchase by the Underwriters of the Firm Securities
        and the Option  Securities  from the  Company,  and the  purchase by the
        Representative of the Representative's Warrants from the Company (C) the
        consummation  by  the  Company  of any of  its  obligations  under  this
        Agreement,   the  Warrant  Agreement  or  the  Representative's  Warrant
        Agreement,  or (D)  resales  of  the  Firm  Securities  and  the  Option
        Securities in connection with the distribution contemplated hereby.

              v. the Registration  Statement is effective under the Act, and, if
        applicable,  filing of all pricing  information  has been timely made in
        the appropriate  form under Rule 430A, and no stop order  suspending the
        use  of  the  Preliminary  Prospectus,  the  Registration  Statement  or
        Prospectus or any part of any thereof or suspending the effectiveness of
        the  Registration  Statement has been issued and no proceedings for that
        purpose  have been  instituted  or are  pending  or, to the best of such
        counsel's knowledge, threatened or contemplated under the Act;

              vi.  each  of  the  Preliminary   Prospectus,   the   Registration
        Statement,  and the Prospectus and any amendments or supplements thereto
        (other than the financial statements and other financial and statistical
        data included  therein,  as to which no opinion need be rendered) comply
        as to form in all material respects with the requirements of the Act and
        the Rules and Regulations.


                                       23





              vii.  to the best of such  counsel's  knowledge,  (A) there are no
        agreements,  contracts  or  other  documents  required  by the Act to be
        described in the Registration  Statement and the Prospectus and filed as
        exhibits to the Registration Statement other than those described in the
        Registration  Statement  (or required to be filed under the Exchange Act
        if upon such filing they would be incorporated,  in whole or in part, by
        reference therein) and the Prospectus and filed as exhibits thereto, and
        the exhibits  which have been filed are correct  copies of the documents
        of  which  they  purport  to be  copies;  (B)  the  descriptions  in the
        Registration   Statement  and  the  Prospectus  and  any  supplement  or
        amendment  thereto of contracts and other documents to which the Company
        or any  Subsidiary  is a party or by which it is  bound,  including  any
        document to which the Company or any  Subsidiary  is a party or by which
        it is bound,  incorporated  by  reference  into the  Prospectus  and any
        supplement or amendment  thereto,  are accurate and fairly represent the
        information  required to be shown by Form S-1;  (C) there is not pending
        or threatened against any of the Company or the Subsidiaries any action,
        arbitration,  suit,  proceeding,  inquiry,  investigation,   litigation,
        governmental or other proceeding (including,  without limitation,  those
        having jurisdiction over environmental or similar matters),  domestic or
        foreign,  pending or threatened  against (or circumstances that may give
        rise to the same), or involving the properties or business of any of the
        Company or the Subsidiaries which (x) is required to be disclosed in the
        Registration  Statement which is not so disclosed (and such  proceedings
        as  are  summarized  in  the   Registration   Statement  are  accurately
        summarized in all  respects),  (y) questions the validity of the capital
        stock of the Company or this  Agreement,  the Warrant  Agreement  or the
        Representative's  Warrant  Agreement,  or of any  action  taken or to be
        taken  by the  Company  pursuant  to or in  connection  with  any of the
        foregoing;  (D) no  statute  or  regulation  or  legal  or  governmental
        proceeding  required to be described in the  Prospectus is not described
        as required;  and (E) there is no action, suit or proceeding pending, or
        threatened,  against or affecting any of the Company or the Subsidiaries
        before any court or arbitrator or governmental  body, agency or official
        (or any  basis  thereof  known  to such  counsel)  in  which  there is a
        reasonable  possibility  of a  decision  which may  result in a material
        adverse  change  in  the  condition,  financial  or  otherwise,  or  the
        earnings, position,  prospects,  stockholders' equity, value, operation,
        properties,  business or results of  operations of any of the Company or
        the   Subsidiaries,   which  could  adversely   affect  the  present  or
        prospective ability of the Company to perform its obligations under this
        Agreement,   the  Warrant  Agreement  or  the  Representative's  Warrant
        Agreement  or which in any manner  draws into  question  the validity or
        enforceability   of  this  Agreement,   the  Warrant  Agreement  or  the
        Representative's Warrant Agreement;

              viii.  the Company has full legal  right,  power and  authority to
        enter  into  each of  this  Agreement,  the  Warrant  Agreement  and the
        Representative's  Warrant Agreement,  and to consummate the transactions
        provided for therein; and each of this Agreement,  the Warrant Agreement
        and the  Representative's  Warrant  Agreement has been duly  authorized,
        executed  and  delivered  by the Company.  Each of this  Agreement,  the
        Warrant Agreement and the Representative's  Warrant Agreement,  assuming
        due  authorization,  execution  and delivery by each other party thereto
        constitutes  a  legal,  valid  and  binding  agreement  of  the  Company
        enforceable  against the Company in accordance with its terms


                                       24




        (except as such enforceability may be limited by applicable  bankruptcy,
        insolvency,   reorganization,   moratorium  or  other  laws  of  general
        application  relating to or affecting  enforcement of creditors'  rights
        and the  application  of equitable  principles  in any action,  legal or
        equitable,  and except as rights to  indemnity  or  contribution  may be
        limited by  applicable  law),  and none of the  Company's  execution  or
        delivery   of   this   Agreement,   the   Warrant   Agreement   and  the
        Representative's   Warrant  Agreement,   its  performance  hereunder  or
        thereunder,  its consummation of the transactions contemplated herein or
        therein, or the conduct of its business as described in the Registration
        Statement,  the Prospectus,  and any amendments or supplements  thereto,
        conflicts  with or will  conflict  with or results or will result in any
        breach or violation of any of the terms or provisions of, or constitutes
        or will  constitute  a  default  under,  or result  in the  creation  or
        imposition of any lien, charge,  claim,  encumbrance,  pledge,  security
        interest,  defect or other  restriction or equity of any kind whatsoever
        upon,  any  property or assets  (tangible or  intangible)  of any of the
        Company  or  the  Subsidiaries   pursuant  to  the  terms  of,  (A)  the
        certificate  of  incorporation  or by-laws of any of the  Company or the
        Subsidiaries,   (B)  any  license,   contract,   collective   bargaining
        agreement,  indenture,  mortgage,  deed of trust,  lease,  voting  trust
        agreement, stockholders agreement, note, loan or credit agreement or any
        other  agreement  or  instrument  to  which  any of the  Company  or the
        Subsidiaries is a party or by which it is or they are or may be bound or
        to which any of its or their  respective  properties or assets (tangible
        or intangible)  is or may be subject,  or any  indebtedness,  or (C) any
        statute,  judgment,  decree, order, rule or regulation applicable to any
        of the Company or the Subsidiaries of any arbitrator,  court, regulatory
        body or  administrative  agency  or other  governmental  agency  or body
        (including,   without   limitation,   those  having   jurisdiction  over
        environmental  or  similar   matters),   domestic  or  foreign,   having
        jurisdiction  over any of the Company or the  Subsidiaries or any of its
        or their respective activities or properties.

              ix. no consent,  approval,  authorization  or order, and no filing
        with, any court, regulatory body, government agency or other body (other
        than such as may be required under Blue Sky laws, as to which no opinion
        need be  rendered)  is required in  connection  with the issuance of the
        Firm Securities and the Option Securities pursuant to the Prospectus and
        the  Registration  Statement,   the  issuance  of  the  Representative's
        Warrants,  the performance of this Agreement,  the Warrant Agreement and
        the   Representative's   Warrant   Agreement,   and   the   transactions
        contemplated hereby and thereby;

              x. the  properties  and  business  of each of the  Company and the
        Subsidiaries conform in all material respects to the description thereof
        contained in the Registration Statement and the Prospectus;  and each of
        the Company and the  Subsidiaries  has good and marketable  title to, or
        valid  and  enforceable  leasehold  estates  in,  all  items of real and
        personal  property stated in the Prospectus to be owned or leased by it,
        in each case free and clear of all liens, charges, claims, encumbrances,
        pledges,  security interests,  defects or other restrictions or equities
        of any kind  whatsoever,  other than those referred to in the Prospectus
        and liens for taxes not yet due and payable;

              xi. none of the Company nor the  Subsidiaries  is in breach of, or
        in  default  under,  any term or  provision  of any  license,  contract,
        collective bargaining agreement,  indenture, 


                                       25





        mortgage, installment sale agreement, deed of trust, lease, voting trust
        agreement, stockholders' agreement, partnership agreement, note, loan or
        credit  agreement or any other  agreement or  instrument  evidencing  an
        obligation for borrowed  money,  or any other agreement or instrument to
        which any of the Company or the  Subsidiaries is a party or by which any
        of the  Company  or  the  Subsidiaries  may be  bound  or to  which  the
        respective  properties or assets  (tangible or intangible) of any of the
        Company or the  Subsidiaries  is subject  or  affected;  and none of the
        Company nor the Subsidiaries is in violation of any term or provision of
        its  Articles  of  Incorporation  or  By-Laws  or in  violation  of  any
        franchise,  license, permit,  judgment,  decree, order, statute, rule or
        regulation;

              xii. the statements in the Prospectus  under "RISK  FACTORS," "THE
        COMPANY," "BUSINESS,"  "MANAGEMENT," "PRINCIPAL  STOCKHOLDERS," "CERTAIN
        TRANSACTIONS,"  "DESCRIPTION  OF SECURITIES,"  and "SHARES  ELIGIBLE FOR
        FUTURE  SALE" have been  reviewed by such  counsel,  and insofar as they
        refer to statements of law, descriptions of statutes, licenses, rules or
        regulations or legal conclusions, are correct in all material respects;

              xiii. the Securities have been accepted for quotation on Amex;

              xiv. the persons listed under the caption "PRINCIPAL STOCKHOLDERS"
        in the Prospectus are the respective "beneficial owners" (as such phrase
        is defined in regulation 13d-3 under the Exchange Act) of the securities
        set forth  opposite  their  respective  names  thereunder  as and to the
        extent set forth therein;

              xv.  none  of the  Company,  the  Subsidiaries  nor  any of  their
        respective  officers,  stockholders,  employees or agents, nor any other
        person acting on behalf of any of the Company or the  Subsidiaries  has,
        directly  or  indirectly,  given or  agreed to give any  money,  gift or
        similar benefit (other than legal price  concessions to customers in the
        ordinary  course of business)  to any  customer,  supplier,  employee or
        agent  of a  customer  or  supplier,  or  official  or  employee  of any
        governmental  agency or instrumentality  of any government  (domestic or
        foreign) or any  political  party or candidate  for office  (domestic or
        foreign)  or  other  person  who is or may be in a  position  to help or
        hinder the business of any of the Company or the Subsidiaries (or assist
        it in  connection  with any actual or  proposed  transaction)  which (A)
        might  subject any of the Company or the  Subsidiaries  to any damage or
        penalty in any civil, criminal or governmental litigation or proceeding,
        (B) if not given in the past,  might have had an  adverse  effect on the
        assets, business or operations of the Company and the Subsidiaries taken
        as a whole, as reflected in any of the financial statements contained in
        the Registration Statement, or (C) if not continued in the future, might
        adversely  affect the assets,  business,  operations or prospects of the
        Company and the Subsidiaries taken as a whole;

              xvi. no person,  corporation,  trust, partnership,  association or
        other entity has the right to include and/or  register any securities of
        the Company in the Registration  Statement,  require the Company to file
        any registration statement or, if filed, to include any security in such
        registration statement;


                                       26





              xvii. except as described in the Prospectus,  there are no claims,
        payments, issuances,  arrangements or understandings for services in the
        nature of a finder's or origination  fee with respect to the sale of the
        Securities hereunder or financial  consulting  arrangements or any other
        arrangements, agreements, understandings, payments or issuances that may
        affect the Underwriters' compensation, as determined by the NASD;

              xviii.  assuming due  execution by the parties  thereto other than
        the  Company,  the  Lock-up  Agreements  are  legal,  valid and  binding
        obligations of the parties  thereto,  enforceable  against the party and
        any subsequent  holder of the securities  subject  thereto in accordance
        with  its  terms  (except  as  such  enforceability  may be  limited  by
        applicable bankruptcy, insolvency,  reorganization,  moratorium or other
        laws of general  application  relating to or  affecting  enforcement  of
        creditors'  rights and the  application  of equitable  principles in any
        action,  legal or  equitable,  and  except  as rights  to  indemnity  or
        contribution may be limited by applicable law);

              xix.  except as described in the  Prospectus,  none of the Company
        nor the Subsidiaries (A) maintains, sponsors or contributes to any ERISA
        Plans, (B) maintains or contributes, now or at any time previously, to a
        defined benefit plan, as defined in Section 3(35) of ERISA,  and (C) has
        ever completely or partially withdrawn from a "multiemployer plan";

              xx. the minute  books of each of the Company and the  Subsidiaries
        have been made  available  to the  Underwriters  and  contain a complete
        summary of all meetings and actions of the directors and stockholders of
        the  Company  since  the  time  of its  incorporation  and  reflect  all
        transactions  referred to in such  minutes  accurately  in all  material
        respects;

              xxi.  except  as set  forth  in  the  Prospectus  and to the  best
        knowledge of such counsel, no officer, director or stockholder of any of
        the Company or the  Subsidiaries,  or any "affiliate" or "associate" (as
        these  terms are  defined  in Rule 405  promulgated  under the Rules and
        Regulations) of any of the foregoing persons or entities has or has had,
        either  directly or indirectly,  (A) an interest in any person or entity
        which (x) furnishes or sells services or products which are furnished or
        sold or are  proposed to be  furnished  or sold by any of the Company or
        the Subsidiaries,  or (y) purchases from or sells or furnishes to any of
        the  Company  or  the  Subsidiaries  any  goods  or  services,  or (B) a
        beneficial  interest in any  contract or  agreement  to which any of the
        Company  or the  Subsidiaries  is a party  or by which it or they may be
        bound or affected.  Except as set forth in the Prospectus under "CERTAIN
        TRANSACTIONS,"   there  are  no   existing   agreements,   arrangements,
        understandings or transactions,  or proposed  agreements,  arrangements,
        understandings  or transactions,  between or among any of the Company or
        the  Subsidiaries,   and  any  officer,   director,  or  5%  or  greater
        securityholder  of any  of  the  Company  or  the  Subsidiaries,  or any
        affiliate or associate of any such person or entity;

              xxii.  each of the Company and the  Subsidiaries  is in compliance
        with all provisions of Section 1 of Laws of Florida,  Chapter 92-198, An
        Act Relating to Disclosure of Doing Business with Cuba;


                                       27




              xxiii. to the best of such counsel's knowledge, after due inquiry,
        there is no action, suit, proceeding, inquiry, investigation, litigation
        or governmental  proceeding,  domestic or foreign, pending or threatened
        (or  circumstances  that  may  give  rise  to the  same)  involving  the
        Company's or any Subsidiary's production, use, testing, manufacturing or
        marketing of any products or services, which (i) questions the authority
        of the Company or any Subsidiary to produce,  use, test,  manufacture or
        market any  products or services as described  in the  Prospectus,  (ii)
        questions the  completeness or accuracy of data generated by any trials,
        tests or studies  being  conducted by or on behalf of the Company or any
        of its Subsidiaries, (iii) is required to be disclosed in the Prospectus
        which is not so disclosed, or (iv) might materially and adversely affect
        the  condition,  financial or  otherwise,  or the  earnings,  prospects,
        value, operations or business of the Company and the Subsidiaries, taken
        as a whole.

              xxiv.  none  of the  Company,  the  Subsidiaries  or any of  their
        respective  affiliates  shall be subject to the requirements of or shall
        be deemed an  "Investment  Company,"  pursuant to and as defined  under,
        respectively, the Investment Company Act.

        Such  counsel  shall  state  that  such  counsel  has   participated  in
conferences  with  officers  and other  representatives  of the  Company and the
Subsidiaries,  and representatives of the independent public accountants for the
Company and the  Subsidiaries,  at which conferences such counsel made inquiries
of such officers,  representatives and accountants and discussed the contents of
the Preliminary  Prospectus,  the Registration  Statement,  the Prospectus,  and
related  matters  and,  although  such  counsel is not passing upon and does not
assume any  responsibility  for the  accuracy,  completeness  or fairness of the
statements contained in the Preliminary  Prospectus,  the Registration Statement
and  Prospectus,  on the  basis  of the  foregoing,  no facts  have  come to the
attention  of  such  counsel   which  lead  them  to  believe  that  either  the
Registration  Statement or any amendment thereto,  at the time such Registration
Statement  or  amendment  became  effective  or the  Preliminary  Prospectus  or
Prospectus  or  amendment or  supplement  thereto as of the date of such opinion
contained any untrue statement of a material fact or omitted to state a material
fact required to be stated therein or necessary to make the  statements  therein
not  misleading (it being  understood  that such counsel need express no opinion
with respect to the financial  statements and schedules and other  financial and
statistical  data  included  in the  Preliminary  Prospectus,  the  Registration
Statement or the Prospectus). Such counsel shall further state that its opinions
may be relied  upon by  Underwriters'  Counsel in  rendering  its opinion to the
Underwriters.

        In  rendering  such  opinion,  such  counsel  may rely (A) as to matters
involving the  application  of laws other than the laws of the United States and
jurisdictions  in which they are  admitted,  to the extent  such  counsel  deems
proper and to the extent  specified in such opinion,  if at all, upon an opinion
or opinions (in form and substance  satisfactory  to  Underwriters'  Counsel) of
other counsel acceptable to Underwriters' Counsel,  familiar with the applicable
laws; (B) as to matters of fact, to the extent they deem proper, on certificates
and written  statements of  responsible  officers of each of the Company and the
Subsidiaries  and  certificates  or other  written  statements  of  officers  of
departments of various  jurisdictions having custody of documents respecting the
corporate   existence  or  good   standing  of  each  of  the  Company  and  the
Subsidiaries,  provided that copies of any such statements or certificates shall
be delivered to


                                       28






Underwriters' Counsel if requested.  The opinion of such counsel for the Company
and the  Subsidiaries  shall state that the opinion of any such other counsel is
in form satisfactory to such counsel and that the Representative,  Underwriters'
Counsel and they are each justified in relying  thereon.  Any opinion of counsel
for the Company and the  Subsidiaries  shall not state that it is to be governed
or  qualified  by, or that it is  otherwise  subject to, any  treatise,  written
policy  or  other  document  relating  to  legal  opinions,  including,  without
limitation,  the Legal Opinion  Accord of the ABA Section of Business Law (1991)
or any comparable state accord.

              (e) At the Closing Date, the Underwriters  shall have received the
favorable  opinion of Morrison & Foerster LLP, patent counsel to the Company and
the Subsidiaries, dated the Closing Date, addressed to the Underwriters, in form
and substance  satisfactory to Underwriters'  Counsel and in  substantially  the
form of Schedule B hereto.

              (f) At each Option  Closing Date, if any, the  Underwriters  shall
have received the favorable opinions of each of Wilson Sonini Goodrich & Rosati,
counsel to the Company and the Subsidiaries, and Morrison & Foerster LLP, patent
counsel to the Company and the  Subsidiaries,  dated such Option  Closing  Date,
addressed  to the  Underwriters  and  in  form  and  substance  satisfactory  to
Underwriters'  Counsel  confirming as of such Option Closing Date the statements
made by each of Wilson Sonsini  Goodrich & Rosati,  and Morrison & Foerster LLP,
in their respective opinions delivered on the Closing Date.

              (g) On or  prior  to each of the  Closing  Date  and  each  Option
Closing  Date, if any,  Underwriters'  Counsel  shall have been  furnished  such
documents,  certificates  and  opinions as they may  reasonably  require for the
purpose  of  enabling  them to review or pass upon the  matters  referred  to in
subsection  (c) of this  Section  6,  or in  order  to  evidence  the  accuracy,
completeness  or  satisfaction  of  any of the  representations,  warranties  or
conditions of the Company, or herein contained.

         (h) Prior to each of the Closing Date and each Option  Closing Date, if
any,  (i) there  shall have been no  material  adverse  change  nor  development
involving  a  prospective  change  in the  condition,  financial  or  otherwise,
earnings,  position,  value,  properties,  results  of  operations,   prospects,
stockholders'  equity or the  business  activities  of any of the Company or the
Subsidiaries, whether or not in the ordinary course of business, from the latest
dates as of which such condition is set forth in the Registration  Statement and
Prospectus;  (ii) there  shall  have been no  transaction,  not in the  ordinary
course of business, entered into by any of the Company or the Subsidiaries, from
the latest  date as of which the  financial  condition  of the  Company  and the
Subsidiaries is set forth in the Registration  Statement and Prospectus which is
adverse to the Company and the Subsidiaries  taken as a whole; (iii) none of the
Company nor the  Subsidiaries  shall be in default  under any  provision  of any
instrument  relating to any outstanding  indebtedness;  (iv) none of the Company
nor  the  Subsidiaries   shall  have  issued  any  securities  (other  than  the
Securities) or declared or paid any dividend or made any distribution in respect
of its  capital  stock of any class  and  there  has not been any  change in the
capital  stock  or any  material  change  in the debt  (long  or short  term) or
liabilities or obligations of any of the Company or the Subsidiaries (contingent
or otherwise); (v) no material amount of the assets of any of the Company or the
Subsidiaries  shall have been pledged or  mortgaged,  except as set forth in the
Registration  Statement and Prospectus;  (vi) no action, suit or proceeding,  at
law or


                                       29




in equity,  shall have been pending or threatened (or circumstances  giving rise
to same) against any of the Company or the Subsidiaries, or affecting any of its
or their respective  properties or businesses before or by any court or federal,
state or foreign  commission,  board or other  administrative  agency wherein an
unfavorable  decision,  ruling or finding  may  adversely  affect the  business,
operations,  earnings,  position,  value,  properties,  results  of  operations,
prospects or financial  condition or income of the Company and the  Subsidiaries
taken as a whole;  and (vii) no stop order shall have been issued  under the Act
and  no  proceedings   therefor  shall  have  been   initiated,   threatened  or
contemplated by the Commission.

              (i) At each of the Closing Date and each Option  Closing  Date, if
any, the Underwriters shall have received a certificate of the Company signed by
the principal  executive  officer and by the chief financial or chief accounting
officer of the Company,  dated the Closing Date or Option  Closing  Date, as the
case may be, to the effect that each of such persons has carefully  examined the
Registration Statement, the Prospectus and this Agreement, and that:

              i. The  representations  and  warranties  of the  Company  in this
        Agreement are true and correct, as if made on and as of the Closing Date
        or the Option  Closing  Date,  as the case may be, and the  Company  has
        complied with all  agreements and covenants and satisfied all conditions
        contained in this  Agreement on its part to be performed or satisfied at
        or prior to such Closing Date or Option  Closing  Date,  as the case may
        be;

              ii. No stop order suspending the effectiveness of the Registration
        Statement or any part thereof has been issued,  and no  proceedings  for
        that purpose have been instituted or are pending or, to the best of each
        of such person's  knowledge,  are  contemplated or threatened  under the
        Act;

              iii. The  Registration  Statement and the Prospectus  and, if any,
        each amendment and each supplement  thereto,  contain all statements and
        information   required  to  be  included   therein,   and  none  of  the
        Registration  Statement,  the Prospectus nor any amendment or supplement
        thereto  includes any untrue  statement  of a material  fact or omits to
        state any material  fact  required to be stated  therein or necessary to
        make the statements  therein not misleading and neither the  Preliminary
        Prospectus or any supplement  thereto included any untrue statement of a
        material  fact or  omitted to state any  material  fact  required  to be
        stated therein or necessary to make the statements  therein, in light of
        the circumstances under which they were made, not misleading; and

              iv.  Subsequent to the respective dates as of which information is
        given in the Registration Statement and the Prospectus,  (a) none of the
        Company  nor the  Subsidiaries  has  incurred  up to and  including  the
        Closing Date or the Option  Closing Date, as the case may be, other than
        in the ordinary  course of its  business,  any material  liabilities  or
        obligations,  direct  or  contingent;  (b) none of the  Company  nor the
        Subsidiaries  has paid or declared any dividends or other  distributions
        on its capital stock;  (c) none of the Company nor the  Subsidiaries has
        entered into any  transactions  not in the ordinary  course of business;
        (d) there has not been any change in the capital stock or long-term debt
        or any increase in the short-term borrowings (other than any increase in
        the short-term  borrowings in the ordinary course of business) of any of
        the  Company  or the  Subsidiaries; 


                                       30




        (e) none of the Company nor the  Subsidiaries  has sustained any loss or
        damage to its or their respective  properties or assets,  whether or not
        insured;  (f) there is no litigation  which is pending or threatened (or
        circumstances  giving  rise to same)  against  any of the Company or the
        Subsidiaries  or any affiliated  party of any of the foregoing  which is
        required to be set forth in an amended or supplemented  Prospectus which
        has not been set forth;  and (g) there has occurred no event required to
        be set forth in an amended or supplemented Prospectus which has not been
        set forth.

References to the  Registration  Statement and the Prospectus in this subsection
(j) are to such  documents  as  amended  and  supplemented  at the  date of such
certificate.

              (j) By the  Closing  Date,  the  Underwriters  will have  received
clearance from the NASD as to the amount of compensation allowable or payable to
the Underwriters, as described in the Registration Statement.

              (k) At the time this Agreement is executed, the Underwriters shall
have received a letter,  dated such date,  addressed to the Underwriters in form
and substance satisfactory  (including the non-material nature of the changes or
decreases,  if any,  referred to in clause  (iii)  below) in all respects to the
Underwriters and Underwriters' Counsel, from Ernst & Young, LLP:

              i.  confirming  that  they  are   independent   certified   public
        accountants with respect to the Company and the Subsidiaries  within the
        meaning of the Act and the applicable Rules and Regulations;

              ii.  stating  that  it is  their  opinion  that  the  consolidated
        financial  statements  and  supporting  schedules of the Company and the
        Subsidiaries included in the Registration Statement comply as to form in
        all material respects with the applicable accounting requirements of the
        Act and the Rules and Regulations thereunder and that the Representative
        may rely upon the  opinion  of Ernst & Young,  LLP with  respect  to the
        consolidated  financial  statements and supporting schedules included in
        the Registration Statement;

              iii. stating that, on the basis of a limited review which included
        a reading of the latest available unaudited interim financial statements
        of each of the  Company  and the  Subsidiaries,  a reading of the latest
        available  minutes of the  stockholders  and board of directors  and the
        various committees of the boards of directors of each of the Company and
        the  Subsidiaries,  consultations  with officers and other  employees of
        each of the Company and the  Subsidiaries  responsible for financial and
        accounting matters and other specified procedures and inquiries, nothing
        has come to their  attention  which would lead them to believe  that (A)
        the unaudited consolidated financial statements and supporting schedules
        of the  Company  and  the  Subsidiaries 


                                       31





        included in the  Registration  Statement do not comply as to form in all
        material respects with the applicable accounting requirements of the Act
        and the Rules and Regulations or are not fairly  presented in conformity
        with  generally  accepted  accounting  principles  applied  on  a  basis
        substantially consistent with that of the audited consolidated financial
        statements  of  the  Company  and  the  Subsidiaries   included  in  the
        Registration  Statement,  or (B) at a specified  date not more than five
        (5) days  prior to the  effective  date of the  Registration  Statement,
        there has been any change in the capital stock or long-term  debt of any
        of the Company or the Subsidiaries, or any decrease in the stockholders'
        equity or net current  assets or net assets of any of the Company or the
        Subsidiaries  as compared  with  amounts  shown in the December 31, 1996
        balance sheet included in the Registration Statement,  other than as set
        forth in or contemplated by the Registration Statement, or, if there was
        any  change or  decrease,  setting  forth the  amount of such  change or
        decrease,  and  (C)  during  the  period  from  December  31,  1996 to a
        specified  date not more than five (5) days prior to the effective  date
        of the Registration  Statement,  there was any decrease in net revenues,
        net  earnings or increase in net earnings per common share of any of the
        Company  or  the  Subsidiaries,  in  each  case  as  compared  with  the
        corresponding  period  beginning  December 31,  1995,  other than as set
        forth in or contemplated by the Registration Statement, or, if there was
        any such decrease, setting forth the amount of such decrease;

              iv. setting forth, at a date not later than five (5) days prior to
        the date of the Registration Statement, the amount of liabilities of the
        Company and the Subsidiaries taken as a whole (including a break-down of
        commercial paper and notes payable to banks);

              v.  stating  that  they have  compared  specific  dollar  amounts,
        numbers of shares, percentages of revenues and earnings,  statements and
        other   financial   information   pertaining  to  the  Company  and  the
        Subsidiaries set forth in the Prospectus in each case to the extent that
        such amounts,  numbers,  percentages,  statements and information may be
        derived from the general accounting  records,  including work sheets, of
        the Company and the Subsidiaries  and excluding any questions  requiring
        an interpretation  by legal counsel,  with the results obtained from the
        application  of  specified  readings,  inquiries  and other  appropriate
        procedures  (which  procedures  do  not  constitute  an  examination  in
        accordance with generally accepted auditing  standards) set forth in the
        letter and found them to be in agreement;

              vi.   statements  as  to  such  other  matters   incident  to  the
        transaction contemplated hereby as the Representative may request.

              (l) At the Closing Date and each Option  Closing Date, if any, the
Underwriters  shall have received from Ernst & Young, LLP a letter,  dated as of
the Closing Date or the Option  Closing  Date, as the case may be, to the effect
that they  reaffirm that  statements  made in the letter  furnished  pursuant to
subsection (k) of this Section, except that the specified date referred to shall
be a date not more than five (5) days  prior to the  Closing  Date or the Option
Closing  Date,  as the case may be,  and,  if the Company has elected to rely on
Rule 430A of the Rules and  Regulations,  to the  further  effect that they have
carried out  procedures  as  specified in clause (v) of  subsection  (k) of this
Section with respect to certain amounts,  percentages and financial  information
as specified by the  Representative  and deemed to be a part of the Registration
Statement pursuant to Rule 430A(b) and have found such amounts,  percentages and
financial  information  to be in  agreement  with the records  specified in such
clause (v).


                                       32





              (m) On each of the Closing Date and each Option  Closing  Date, if
any, there shall have been duly tendered to the  Representative  for the several
Underwriters' accounts the appropriate number of Securities.

              (n)  No  order  suspending  the  sale  of  the  Securities  in any
jurisdiction  designated by the  Representative  pursuant to  subsection  (e) of
Section 4 hereof shall have been issued on either the Closing Date or the Option
Closing  Date,  if any,  and no  proceedings  for that  purpose  shall have been
instituted or shall be contemplated.

              (o) On or before the Closing Date, the Company shall have executed
and delivered to the Representative,  (i) the Representative's Warrant Agreement
substantially in the form filed as Exhibit [___] to the Registration  Statement,
in final form and substance  satisfactory  to the  Representative,  and (ii) the
Representative's  Warrants in such  denominations and to such designees as shall
have been provided to the Company.

              (p) On or before the Closing Date, the Firm  Securities and Option
Securities  shall have been duly  approved for  quotation on Nasdaq,  subject to
official notice of issuance.

              (q) On or before the Closing Date, there shall have been delivered
to the  Representative  all of the  Lock-up  Agreements,  in form and  substance
satisfactory to Underwriters' Counsel.

              (r) On or before the Closing Date, the Company shall have executed
and delivered to the Representative and the Transfer Agent the Warrant Agreement
substantially in the form filed as Exhibit [___] to the Registration  Statement,
in final form and substance satisfactory to the Representative.

        If  any  condition  to the  Underwriters'  obligations  hereunder  to be
fulfilled  prior to or at the Closing Date or the relevant  Option Closing Date,
as the case may be, is not so fulfilled,  the  Representative may terminate this
Agreement or, if the  Representative so elects, it may waive any such conditions
which have not been fulfilled or extend the time for their fulfillment.

        7.    Indemnification.

              (a) The Company  agrees to indemnify and hold harmless each of the
Underwriters  (for  purposes of this Section 7  "Underwriter"  shall include the
officers, directors, partners, employees, agents and counsel of the Underwriter,
including  specifically each person who may be substituted for an Underwriter as
provided  in Section 11 hereof),  and each  person,  if any,  who  controls  the
Underwriter  ("controlling  person") within the meaning of Section 15 of the Act
or Section  20(a) of the  Exchange  Act,  from and  against  any and all losses,
claims,  damages,  expenses  or  liabilities,  joint or  several  (and  actions,
proceedings,   investigations,   inquiries,  suits  and  litigation  in  respect
thereof),  whatsoever  (including  but  not  limited  to any  and  all  expenses
whatsoever reasonably incurred in investigating,  preparing or defending against
any such claim, action, proceeding,  investigation, inquiry, suit or litigation,
commenced or  threatened,  or any claim  whatsoever),  as such are incurred,  to
which the  Underwriter or such  controlling  person may become subject under the
Act,  the  Exchange  Act or any other  statute or at common law or


                                       33




otherwise or under the laws of foreign  countries,  arising out of or based upon
(A) any  untrue  statement  or  alleged  untrue  statement  of a  material  fact
contained (i) in any Preliminary  Prospectus,  the Registration Statement or the
Prospectus  (as  from  time  to  time  amended  and  supplemented);  (ii) in any
post-effective  amendment or  amendments or any new  registration  statement and
prospectus  in which is included  securities  of the Company  issued or issuable
upon exercise of the  Securities;  or (iii) in any application or other document
or written  communication (in this Section 7 collectively called  "application")
executed  by the  Company or based upon  written  information  furnished  by the
Company  in any  jurisdiction  in order to  qualify  the  Securities  under  the
securities  laws  thereof or filed  with the  Commission,  any state  securities
commission or agency, Nasdaq or any other securities exchange;  (B) the omission
or alleged  omission  therefrom of a material fact required to be stated therein
or necessary to make the  statements  therein not misleading (in the case of the
Prospectus,  in the light of the  circumstances  under which they were made), or
(C) any breach of any  representation,  warranty,  covenant or  agreement of the
Company contained herein or in any certificate by or on behalf of the Company or
any of its officers delivered pursuant hereto, unless, in the case of clause (A)
or (B) above, such statement or omission was made in reliance upon and in strict
conformity with written information furnished to the Company with respect to any
Underwriter  by or on  behalf  of  such  Underwriter  expressly  for  use in any
Preliminary  Prospectus,  the  Registration  Statement  or  Prospectus,  or  any
amendment thereof or supplement thereto, or in any application,  as the case may
be.

        The indemnity  agreement in this  subsection (a) shall be in addition to
any liability which the Company may have at common law or otherwise.

              (b) Each of the Underwriters agrees severally, but not jointly, to
indemnify  and hold  harmless the Company,  each of its  directors,  each of its
officers who has signed the Registration  Statement,  and each other person,  if
any, who controls the Company  within the meaning of the Act, to the same extent
as the foregoing  indemnity from the Company to the  Underwriters  but only with
respect to statements or omissions,  if any, made in any Preliminary Prospectus,
the Registration  Statement or Prospectus or any amendment thereof or supplement
thereto or in any  application  made in reliance upon, and in strict  conformity
with,  written  information  furnished  to  the  Company  with  respect  to  any
Underwriter  by  such   Underwriter   expressly  for  use  in  such  Preliminary
Prospectus, the Registration Statement or Prospectus or any amendment thereof or
supplement  thereto  or in any such  application,  provided  that  such  written
information  or  omissions  only  pertain  to  disclosures  in  the  Preliminary
Prospectus,  the Registration  Statement or Prospectus  directly relating to the
transactions effected by the Underwriters in connection with this Offering.  The
Company  acknowledges that the statements with respect to the public offering of
the Firm  Securities  and the  Option  Securities  set forth  under the  heading
"Underwriting"  and  the  stabilization  legend  in  the  Prospectus  have  been
furnished by the Underwriters  expressly for use therein and constitute the only
information  furnished  in  writing  by or on  behalf  of the  Underwriters  for
inclusion in the Prospectus.

              (c)  Promptly  after  receipt by an  indemnified  party under this
Section  7  of  notice  of  the  commencement  of  any  claim,   action,   suit,
investigation,  inquiry, proceeding or litigation, such indemnified party shall,
if a claim in respect  thereof is to be made  against  one or more  indemnifying
parties under this Section 7, notify each party against whom  indemnification is
to

                                       34




be sought in writing of the  commencement  thereof (but the failure so to notify
an indemnifying  party shall not relieve it from any liability which it may have
under this  Section 7 except to the extent  that it has been  prejudiced  in any
material  respect  by such  failure  or from  any  liability  which  it may have
otherwise).  In case any  such  claim,  action,  suit,  investigation,  inquiry,
proceeding  or  litigation  is brought  against any  indemnified  party,  and it
notifies  an  indemnifying  party or parties of the  commencement  thereof,  the
indemnifying  party or parties will be entitled to participate  therein,  and to
the extent it may elect by written  notice  delivered to the  indemnified  party
promptly after receiving the aforesaid  notice from such  indemnified  party, to
assume  the  defense  thereof  with  counsel  reasonably  satisfactory  to  such
indemnified  party.  Notwithstanding  the foregoing,  the  indemnified  party or
parties shall have the right to employ its or their own counsel in any such case
but the fees and  expenses  of such  counsel  shall  be at the  expense  of such
indemnified  party or parties  unless (i) the  employment  of such counsel shall
have been authorized in writing by the  indemnifying  parties in connection with
the  defense of  thereof at the  expense  of the  indemnifying  party,  (ii) the
indemnifying parties shall not have employed counsel reasonably  satisfactory to
such indemnified party to have charge of the defense thereof within a reasonable
time after notice of commencement  thereof,  or (iii) such indemnified  party or
parties shall have reasonably  concluded that there may be defenses available to
it or them which are different  from or additional to those  available to one or
all of the indemnifying  parties (in which case the  indemnifying  parties shall
not have the right to direct the  defense  thereof on behalf of the  indemnified
party or  parties),  in any of  which  events  such  fees  and  expenses  of one
additional counsel shall be borne by the indemnifying parties. In no event shall
the  indemnifying  parties  be  liable  for fees and  expenses  of more than one
counsel (in addition to any local  counsel)  separate from their own counsel for
all  indemnified  parties  in  connection  with  any one  claim,  action,  suit,
investigation,  inquiry,  proceeding  or  litigation  or separate but similar or
related  claims,  actions,  suits,  investigations,  inquiries,  proceedings  or
litigation in the same jurisdiction  arising out of the same general allegations
or circumstances. Anything in this Section 7 to the contrary notwithstanding, an
indemnifying party shall not be liable for any settlement of any claim,  action,
suit,  investigation,  inquiry,  proceeding or litigation  effected  without its
written  consent;  provided,  however,  that such  consent was not  unreasonably
withheld.  An indemnifying  party will not, without the prior written consent of
the  indemnified  parties,  settle,  compromise  or  consent to the entry of any
judgment  with  respect  to any  pending  or  threatened  claim,  action,  suit,
investigation,   inquiry,   proceeding   or   litigation  in  respect  of  which
indemnification  or  contribution  may be sought  hereunder  (whether or not the
indemnified parties are actual or potential parties to such claim, action, suit,
investigation,  inquiry,  proceeding  or  litigation),  unless such  settlement,
compromise or consent (i) includes an unconditional  release of each indemnified
party from all liability arising out of such claim, action, suit, investigation,
inquiry, proceeding or litigation and (ii) does not include a statement as to or
an  admission of fault,  culpability  or a failure to act by or on behalf of any
indemnified party.

              (d) In order to provide for just and equitable contribution in any
case in which (i) an indemnified party makes claim for indemnification  pursuant
to this  Section  7, but it is  judicially  determined  (by the entry of a final
judgment or decree by a court of competent  jurisdiction  and the  expiration of
time  to  appeal  or  the  denial  of  the  last  right  of  appeal)  that  such
indemnification  may not be enforced in such case  notwithstanding the fact that
the express  provisions  of this Section 7 provide for  indemnification  in such
case,  or (ii)  contribution  under the Act may be  required  on the part of any
indemnified  party, then each indemnifying  party shall contribute to


                                       35




the  amount  paid as a result  of such  losses,  claims,  damages,  expenses  or
liabilities  (or  actions  in  respect  thereof)  (A) in such  proportion  as is
appropriate  to  reflect  the  relative   benefits   received  by  each  of  the
contributing  parties,  on the one hand,  and the party to be indemnified on the
other hand, from the offering of the Firm  Securities and the Option  Securities
or (B) if the  allocation  provided  by  clause  (A) above is not  permitted  by
applicable  law, in such  proportion as is  appropriate  to reflect not only the
relative benefits referred to in clause (i) above but also the relative fault of
each  of the  contributing  parties,  on the  one  hand,  and  the  party  to be
indemnified  on the other hand in  connection  with the  statements or omissions
that resulted in such losses, claims, damages, expenses or liabilities,  as well
as any other relevant equitable considerations. In any case where the Company is
the  contributing  party and the  Underwriters  are the indemnified  party,  the
relative benefits received by the Company on the one hand, and the Underwriters,
on the  other,  shall be  deemed to be in the same  proportion  as the total net
proceeds  from the  offering of the Firm  Securities  and the Option  Securities
(before deducting expenses) bear to the total underwriting discounts received by
the Underwriters  hereunder, in each case as set forth in the table on the Cover
Page of the  Prospectus.  Relative  fault shall be  determined  by reference to,
among other things, whether the untrue or alleged untrue statement of a material
fact or the  omission or alleged  omission to state a material  fact  relates to
information  supplied by the Company,  or by the Underwriters,  and the parties'
relative intent, knowledge,  access to information and opportunity to correct or
prevent  such untrue  statement  or  omission.  The amount paid or payable by an
indemnified  party as a result  of the  losses,  claims,  damages,  expenses  or
liabilities (or actions in respect thereof) referred to above in this subsection
(d) shall be deemed to include any legal or other expenses  reasonably  incurred
by such indemnified party in connection with investigating or defending any such
action or claim.  Notwithstanding  the  provisions of this  subsection  (d), the
Underwriters  shall not be  required to  contribute  any amount in excess of the
underwriting   discount  applicable  to  the  Firm  Securities  and  the  Option
Securities  purchased  by  the  Underwriters  hereunder.  No  person  guilty  of
fraudulent  misrepresentation  (within the meaning of Section  11(f) of the Act)
shall be  entitled  to  contribution  from any person who was not guilty of such
fraudulent  misrepresentation.  For purposes of this Section 7, each person,  if
any, who controls the Company or the Underwriter  within the meaning of the Act,
each officer of the Company who has signed the Registration Statement,  and each
director  of the  Company  shall  have the same  rights to  contribution  as the
Company  or the  Underwriter,  as the case may be,  subject in each case to this
subsection (d). Any party entitled to contribution will,  promptly after receipt
of notice of commencement of any action,  suit or proceeding  against such party
in respect to which a claim for  contribution  may be made against another party
or parties  under this  subsection  (d),  notify such party or parties from whom
contribution may be sought,  but the omission so to notify such party or parties
shall not relieve the party or parties from whom contribution may be sought from
any  obligation  it or they may have  hereunder  or  otherwise  than  under this
subsection  (d), or to the extent that such party or parties were not  adversely
affected by such omission.  The contribution  agreement set forth above shall be
in addition to any liabilities  which any indemnifying  party may have at common
law or otherwise.

        8.   Representations   and   Agreements   to   Survive   Delivery.   All
representations,  warranties  and  agreements  contained  in this  Agreement  or
contained in certificates of officers of the Company submitted  pursuant hereto,
shall be deemed to be representations,  warranties and agreements at the Closing
Date and the Option Closing Date, as the case may be, and such 


                                       36






representations,  warranties  and  agreements  of the Company and the  indemnity
agreements  contained in Section 7 hereof,  shall remain  operative  and in full
force and effect  regardless  of any  investigation  made by or on behalf of any
Underwriter,  the Company,  any  controlling  person of any  Underwriter  or the
Company,  and shall survive  termination  of this  Agreement or the issuance and
delivery of the Securities to the  Underwriters and the  Representative,  as the
case may be.

        9. Effective Date. This Agreement shall become  effective at 10:00 a.m.,
New York City time, on the next full business day following the date hereof,  or
at such earlier time after the Registration  Statement  becomes effective as the
Representative,  in its discretion, shall release the Securities for sale to the
public;  provided,  however, that the provisions of Sections 5, 7 and 10 of this
Agreement  shall at all times be effective.  For purposes of this Section 9, the
Securities  to be purchased  hereunder  shall be deemed to have been so released
upon the earlier of dispatch by the  Representative  of telegrams to  securities
dealers   releasing  such   securities  for  offering  or  the  release  by  the
Representative  for  publication of the first newspaper  advertisement  which is
subsequently published relating to the Securities.

        10.   Termination.

              (a)   Subject  to   subsection   (b)  of  this   Section  10,  the
Representative  shall have the right to  terminate  this  Agreement,  (i) if any
domestic or  international  event or act or occurrence has materially  adversely
disrupted,  or in the  Representative's  opinion  will in the  immediate  future
materially  adversely disrupt,  the financial  markets;  or (ii) if any material
adverse change in the financial markets shall have occurred; or (iii) if trading
generally shall have been suspended or materially  limited on or by, as the case
may be, any of the New York Stock  Exchange,  the American Stock  Exchange,  the
NASD, the Boston Stock Exchange,  the Commission or any  governmental  authority
having  jurisdiction  over  such  matters;  or  (iv)  if  trading  of any of the
securities of the Company shall have been suspended, or any of the securities of
the Company shall have been delisted, on any exchange or in any over-the-counter
market;  (v) if the United  States shall have become  involved in a war or major
hostilities,  or if there shall have been an  escalation  in an existing  war or
major hostilities or a national emergency shall have been declared in the United
States; or (vi) if a banking  moratorium has been declared by a state or federal
authority;  or  (vii) if a  moratorium  in  foreign  exchange  trading  has been
declared;  or (viii) if the  Company  shall have  sustained  a loss  material or
substantial  to the Company by fire,  flood,  accident,  hurricane,  earthquake,
theft,  sabotage or other  calamity or malicious act which,  whether or not such
loss shall have been insured,  will, in the  Representative's  opinion,  make it
inadvisable  to  proceed  with  the  offering,   sale  and/or  delivery  of  the
Securities;  or (ix) if there shall have been such a material  adverse change in
the conditions or prospects of the Company,  or such material  adverse change in
the general market,  political or economic  conditions,  in the United States or
elsewhere,  that, in each case, in the Representative's  judgment, would make it
inadvisable to proceed with the offering, sale and/or delivery of the Securities
or (x) if either of Anthony E.  Maida,  III or Lynn E.  Spitler,  M.D.  shall no
longer serve the Company in his or her present capacity.

              (b) If this  Agreement  is  terminated  by the  Representative  in
accordance  with the  provisions  of Section  10(a) the Company  shall  promptly
reimburse and indemnify the 


                                       37




Representative for all of its actual out-of-pocket expenses,  including the fees
and disbursements of counsel for the Underwriters  (less amounts previously paid
pursuant  to  Section  5(c)  above).   Notwithstanding  any  contrary  provision
contained in this  Agreement,  if this Agreement shall not be carried out within
the  time  specified   herein,   or  any  extension   thereof   granted  to  the
Representative,  by reason of any  failure on the part of the Company to perform
any undertaking or satisfy any condition of this Agreement by it to be performed
or satisfied  (including,  without limitation,  pursuant to Section 6 or Section
12) then, the Company shall promptly  reimburse and indemnify the Representative
for  all  of  its  actual  out-of-pocket   expenses,   including  the  fees  and
disbursements  of counsel for the  Underwriters  (less amounts  previously  paid
pursuant to Section 5(c) above).  In addition,  the Company  shall remain liable
for all Blue Sky  counsel  fees and  disbursements,  expenses  and filing  fees.
Notwithstanding any contrary provision contained in this Agreement, any election
hereunder or any termination of this Agreement  (including,  without limitation,
pursuant to Sections 6, 10, 11 and 12 hereof), and whether or not this Agreement
is otherwise carried out, the provisions of Section 5 and Section 7 shall not be
in any way affected by such election or  termination or failure to carry out the
terms of this Agreement or any part hereof.

        11. Substitution of the Underwriters. If one or more of the Underwriters
shall fail (otherwise than for a reason sufficient to justify the termination of
this  Agreement  under the  provisions  of Section  6,  Section 10 or Section 12
hereof) to purchase the Securities which it or they are obligated to purchase on
such date under this Agreement (the "Defaulted Securities"),  the Representative
shall have the right, within 24 hours thereafter, to make arrangement for one or
more of the non-defaulting Underwriters,  or any other underwriters, to purchase
all, but not less than all, of the  Defaulted  Securities in such amounts as may
be  agreed  upon  and  upon  the  terms  herein  set  forth;  if,  however,  the
Representative  shall not have completed such  arrangements  within such 24-hour
period, then:

              (a) if the number of Defaulted  Securities  does not exceed 10% of
        the total number of Firm  Securities  to be purchased on such date,  the
        non-defaulting  Underwriters  shall be  obligated  to purchase  the full
        amount thereof in the  proportions  that their  respective  underwriting
        obligations  hereunder  bear  to  the  underwriting  obligations  of all
        non-defaulting Underwriters, or

              (b) if the number of Defaulted Securities exceeds 10% of the total
        number  of Firm  Securities,  this  Agreement  shall  terminate  without
        liability on the part of any  non-defaulting  Underwriters  (or, if such
        default  shall  occur  with  respect  to  any  Option  Securities  to be
        purchased  on an  Option  Closing  Date,  the  Underwriters  may  at the
        Representative's  option,  by  notice  from  the  Representative  to the
        Company,  terminate  the  Underwriters'  obligation  to purchase  Option
        Securities from the Company on such date).

        No action taken pursuant to this Section 11 shall relieve any defaulting
Underwriter from liability in respect of any default by such  Underwriter  under
this Agreement.

        In the event of any such default  which does not result in a termination
of this  Agreement,  the  Representative  shall have the right to  postpone  the
Closing  Date for a period not  exceeding


                                       38






seven (7) days in order to  effect  any  required  changes  in the  Registration
Statement or Prospectus or in any other documents or arrangements.

        12.  Default by the  Company.  If the Company  shall fail at the Closing
Date or at any Option  Closing  Date,  as  applicable,  to sell and  deliver the
number of Securities  which it is obligated to sell hereunder on such date, then
this Agreement  shall terminate (or, if such default shall occur with respect to
any  Option   Securities  to  be  purchased  on  an  Option  Closing  Date,  the
Underwriters   may  at  the   Representative's   option,   by  notice  from  the
Representative  to  the  Company,  terminate  the  Underwriters'  obligation  to
purchase Option  Securities from the Company on such date) without any liability
on the part of any  non-defaulting  party  other  than  pursuant  to  Section 5,
Section 7 and Section 10 hereof.  No action  taken  pursuant to this  Section 12
shall relieve the Company from liability, if any, in respect of such default.

        13. Notices. All notices and communications hereunder,  except as herein
otherwise specifically provided, shall be in writing and shall be deemed to have
been  duly   given  if  mailed  or   transmitted   by  any   standard   form  of
telecommunication.  Notices  to  the  Underwriters  shall  be  directed  to  the
Representative at National  Securities  Corporation,  1001 Fourth Avenue,  Suite
2200, Seattle, Washington 98154, Attention: Steven A. Rothstein,  Chairman, with
a copy to Orrick,  Herrington & Sutcliffe  LLP, 666 Fifth Avenue,  New York, New
York 10103, Attention:  Lawrence B. Fisher, Esq. Notices to the Company shall be
directed  to the  Company  at 2010 Crow  Canyon  Place,  Suite  100,  Sam Ramon,
California,  94583,  Attention:  Anthony E. Maida, III, Chief Executive Officer,
with a copy to: Wilson Sonsini Goodrich & Rosati, 650 Page Mill Road, Palo Alto,
California 94304, Attention: Blair W. Stewart, Jr., Esq.

        14.  Parties.  This  Agreement  shall inure solely to the benefit of and
shall be  binding  upon,  the  Underwriters,  the  Company  and the  controlling
persons,  directors  and  officers  referred  to in Section 7 hereof,  and their
respective  successors,  legal  representatives and assigns, and no other person
shall have or be construed to have any legal or equitable right, remedy or claim
under or in respect of or by virtue of this Agreement or any  provisions  herein
contained. No purchaser of Securities from any Underwriter shall be deemed to be
a successor by reason merely of such purchase.

        15. Construction.  This Agreement shall be governed by and construed and
enforced in  accordance  with the laws of the State of New York  without  giving
effect to the choice of law or conflict of laws principles.

        16.  Counterparts.  This  Agreement  may be  executed  in any  number of
counterparts,  each of which shall be deemed to be an original, and all of which
taken together shall be deemed to be one and the same instrument.

        17. Entire Agreement;  Amendments. This Agreement, the Warrant Agreement
and the  Representative's  Warrant Agreement  constitute the entire agreement of
the  parties  hereto  and  supersede  all  prior  written  or  oral  agreements,
understandings and negotiations with respect to the subject matter hereof.  This
Agreement may not be amended except in a writing,  signed by the  Representative
and the Company.


                                       39





        If the  foregoing  correctly  sets forth the  understanding  between the
Underwriters and the Company, please so indicate in the space provided below for
that purpose,  whereupon this letter shall constitute a binding  agreement among
us.

                                          Very truly yours,

                                          JENNER TECHNOLOGIES



                                          By:
                                          --------------------------------------
                                               Anthony E. Maida, III
                                               Chief Executive Officer



Confirmed and accepted as of
the date first above written.


NATIONAL SECURITIES CORPORATION

For itself and as Representative
  of the several Underwriters named
  in Schedule A hereto.


By:
   --------------------------------
    Steven A. Rothstein
    Chairman





                                   SCHEDULE A


                                                                NUMBER OF FIRM
                                                                  SECURITIES
NAME OF UNDERWRITERS                                            TO BE PURCHASED
- --------------------                                            ---------------
National Securities Corporation...........................








Total.....................................................          2,500,000
                                                                    =========   



                                                                     EXHIBIT 3.1

                              AMENDED AND RESTATED

                            ARTICLES OF INCORPORATION

                                       OF

                               JENNER TECHNOLOGIES



         Anthony E. Maida III and Timothy Stevens certify that:

         1. They are the duly  elected and acting  Chief  Executive  Officer and
Assistant  Secretary,   respectively  of  Jenner   Technologies,   a  California
corporation (the "Corporation").

         2. The Articles of  Incorporation of the Corporation are hereby amended
and  restated  to read in their  entirety  as set forth on  Exhibit  A  attached
hereto.

         3. The attached  Amended and Restated  Articles of  Incorporation  have
been duly approved by the Board of Directors of the Corporation.

         4. The attached  Amended and Restated  Articles of  Incorporation  have
been duly  approved by the  required  vote of the  outstanding  shares of Common
Stock and Preferred  Stock  entitled to vote in accordance  with the Articles of
Incorporation  of this  Corporation  and Sections 902 and 903 of the  California
Corporations Code. The total number of outstanding shares of each class entitled
to  vote  with  respect  to the  attached  amendment  and  restatement  was  (i)
16,867,827  shares of Common Stock and (ii) 10,550,000 shares of Preferred Stock
(consisting of 8,550,000 shares of Series A Preferred Stock and 2,000,000 shares
of Series B Preferred Stock). The number of shares of Common Stock and Preferred
Stock voting in favor of the  amendment  equaled or exceeded the vote  required.
The vote required was a majority of the  outstanding  shares of Common Stock and
Preferred Stock each voting separately as a class.


                                      


         The undersigned further declare under penalty of perjury under the laws
of the State of California  that the matters set forth in this  certificate  are
true and correct of their own knowledge.
        
         Executed at Palo Alto, California on June 18, 1996.

                                                /s/ ANTHONY E. MAIDA III
                                                -------------------------
                                                Anthony E. Maida III
                                                Chief Executive Officer



                                                /s/ TIMOTHY STEVENS
                                                -------------------------
                                                Timothy Stevens
                                                Assistant Secretary






                                       -2-





                                    EXHIBIT A

                              AMENDED AND RESTATED

                            ARTICLES OF INCORPORATION

                                       OF

                               JENNER TECHNOLOGIES


                                       I.

         The name of this corporation is Jenner Technologies.


                                       II.

         The  purpose  of this  corporation  is to engage in any  lawful  act or
activity for which a corporation may be organized under the General  Corporation
Law of California,  other than the banking business, the trust company business,
or the practice of a profession  permitted to be  incorporated by the California
Corporations Code.


                                      III.

         This  corporation  is  authorized  to issue two  classes of stock to be
designated, respectively, "Common Stock" and "Preferred Stock." The total number
of shares which the corporation is authorized to issue is 35,000,000  shares, of
which 30,000,000 shares are Common Stock, $0.001 par value, and 5,000,000 shares
are Preferred Stock,  $0.001 par value.  Preferred Stock may be issued from time
to time in one or more series.

         Subject to the  provisions  set forth in  Section 5 of this  Article IV
hereof,  the board of  directors of the  corporation  is  authorized  to fix the
number of shares of any series of any Preferred  Stock and to determine or alter
the rights, preferences,  privileges and restrictions granted to or imposed upon
any  wholly  unissued  series of  Preferred  Stock  and,  within  the limits and
restrictions  stated in any  resolution or resolutions of the board of directors
of the  corporation  originally  fixing  the number of shares  constituting  any
series of Preferred Stock, to increase or decrease,  but not below the number of
shares of any such  series  then  outstanding,  the number of shares of any such
series  subsequent  to the issue of shares of that  series.  The first series of
Preferred  Stock shall be designated  "Series A Preferred"  and shall consist of
2,137,500  shares.  The second  series of  Preferred  Stock shall be  designated
"Series B Preferred" and shall consist of 500,000 shares. The Series A Preferred
and the Series B Preferred are sometimes  collectively referred to herein as the
"Preferred Stock."





         Upon the  filing of these  Restated  Articles  of  Incorporation,  each
outstanding  share of  Common  Stock,  Series A  Preferred  Stock  and  Series B
Preferred  Stock  shall be split up and  converted  into  0.248013819  shares of
Common  Stock,   Series  A  Preferred  Stock  and  Series  B  Preferred   Stock,
respectively.  In lieu of any  fractional  shares  to which a holder  of  Common
Stock,  Series A Preferred Stock and Series B Preferred Stock would otherwise be
entitled,  the holder shall  receive one whole share of Common  Stock,  Series A
Preferred Stock or Series B Preferred Stock, as the case may be.


                                       IV.

         The rights,  preferences,  privileges  and  restrictions  granted to or
imposed upon the Common Stock and Preferred Stock are as follows:

         1. Dividends.  The holders of Preferred  Stock shall be entitled,  when
and if declared by the board of directors of the  corporation,  to dividends out
of assets of the corporation  legally available  therefor at the rate of $0.0605
per share in the case of the Series A  Preferred  and  $0.0907  per share in the
case of the Series B  Preferred,  per annum.  Dividends on the  Preferred  Stock
shall be payable in  preference  and prior to any payment of any dividend on the
Common  Stock of the  corporation.  Thereafter,  the holders of Common Stock and
Preferred  Stock  shall  be  entitled,  when  and if  declared  by the  board of
directors  of the  corporation,  to dividends  out of assets of the  corporation
legally  available  therefor,  provided,  however,  that no such dividend may be
declared or paid on any shares of Common Stock or Preferred  Stock unless at the
same time an equivalent  dividend is declared or paid on all outstanding  shares
of Common Stock and Preferred  Stock,  and provided further that the dividend on
any series of any Preferred Stock shall be payable at the same rate per share as
would be payable on the shares of Common  Stock or other  securities  into which
such series of Preferred  Stock is convertible  immediately  prior to the record
date of such dividend.  The right to dividends on shares of the Common Stock and
Preferred Stock shall not be cumulative, and no right shall accrue to holders of
Common  Stock or  Preferred  Stock by reason of the fact that  dividends on said
shares are not declared in any prior period.

         Dividends,  if paid or declared and set apart for payment, must be paid
or declared and set apart for payment in full on each series of Preferred  Stock
contemporaneously,  or if less than full  dividends are paid or declared and set
apart for payment on each series of  Preferred  Stock,  the same  percentage  of
dividends  shall be paid or  declared  and set  apart for  payment  on each such
series of Preferred Stock,  based on the aggregate  dividend  preference of each
such series.

         2.       Liquidation Preference.

                  (a) Preference.  In the event of any liquidation,  dissolution
or winding up of the  corporation,  either  voluntarily  or  involuntarily,  the
holders of Preferred Stock shall be entitled to receive, prior and in preference
to any  distribution of any of the assets or surplus funds of the corporation to
the holders of Common Stock of the corporation,  an amount equal to: (i) $0.8064
per share of Series A Preferred  then held,  plus a further  amount equal to (A)
the  number  of  shares of Series A  Preferred  then held  multiplied  by .0605,
multiplied by (B) the number of years such shares were held prior to the


                                       -2-



effective date of the liquidation, dissolution or winding up of the corporation;
and (ii)  $1.2096  per share of Series B  Preferred  then  held,  plus a further
amount  equal to (A) the  number  of  shares  of  Series B  Preferred  then held
multiplied by .0907, multiplied by (B) the number of years such shares were held
prior to the effective date of the liquidation, dissolution or winding up of the
corporation.

                  If upon such  liquidation,  dissolution  or  winding up of the
corporation,  the assets of the corporation are  insufficient to provide for the
cash payment to such  holders of the full  preferential  aforesaid  preferential
amounts, then the remaining assets of the corporation shall be distributed among
the holders of Preferred Stock in the proportion that the aggregate preferential
amount of shares  of  Preferred  Stock  held by each  such  holder  bears to the
aggregate preferential amount of all shares of Preferred Stock.

                  After the  payment or setting  apart of payment to the holders
of the  Preferred  Stock of the  preferential  amounts so  payable to them,  the
holders of Common  Stock shall be  entitled  to receive  pro rata the  remaining
assets of the corporation.

                  (b)  Consolidation or Merger. A consolidation or merger of the
corporation with or into any other corporation or corporations, or a sale of all
or substantially  all of the assets of the  corporation,  or a series of related
transactions  in which more than 50% of the voting power of the  corporation  is
disposed of, shall not be deemed to be a liquidation,  dissolution or winding up
within the meaning of this paragraph 2.

                  (c)  Noncash  Distributions.  If  any  of  the  assets  of the
corporation  are to be distributed  other than in cash under this paragraph 2 or
for any purpose,  then the board of directors of the corporation  shall promptly
engage independent  competent appraisers to determine the value of the assets to
be distributed to the holders of Preferred  Stock. The corporation  shall,  upon
receipt of such appraiser's valuation, give prompt written notice to each holder
of shares of Preferred Stock of the appraiser's valuation.

                  (d) Repurchase of Shares.  In connection  with  repurchases by
this corporation of its Common Stock, pursuant to its agreements with certain of
the holders thereof,  Section 502 and 503 of the California General  Corporation
Law shall not apply in all or in part with respect to such repurchases.

         3. Conversion. The holders of the Preferred Stock shall have conversion
rights as follows (the "Conversion Rights"):

                  (a) Right to Convert.  Each share of Preferred  Stock shall be
convertible,  at the option of the holder thereof, at any time after the date of
issuance of such share at the office of the  corporation  or any transfer  agent
for the Preferred  Stock.  Each share of each series of Preferred Stock shall be
convertible  into the  number of fully paid and  nonassessable  shares of Common
Stock which results from dividing the Conversion Value (as hereinafter  defined)
per share in effect for such series at the time of  conversion  by the per share
Conversion Price (as hereinafter defined) of such series. The initial Conversion
Price per share of Series A  Preferred  Stock shall be $0.8064 and the per share
Conversion


                                       -3-



Value of Series A Preferred shall be $0.8064.  The initial  Conversion Price per
share of Series B Preferred shall be $1.2096 and the Conversion  Value per share
of Series B Preferred  shall be $1.2096.  The initial  Conversion  Price of each
series shall be subject to adjustment from time to time as provided  below.  The
number of  shares of Common  Stock  into  which a series of  Preferred  Stock is
convertible is hereinafter referred to as the "Conversion Rate" of such series.

                  (b) Automatic Conversion.  Each share of Preferred Stock shall
automatically  be converted  into shares of Common  Stock at its then  effective
Conversion  Rate (i)  immediately  upon the  closing of an  underwritten  public
offering  pursuant to an effective  registration  statement under the Securities
Act of 1933, as amended,  the aggregate  gross  proceeds to the  corporation  of
which  exceed  $7,500,000  and the per share  price to the public of which is at
least  $8.00,  prior to  deduction  of  underwriting  commissions  and  offering
expenses;  or (ii) upon the effective date of the affirmative vote of holders of
more than 80% of all  outstanding  series  Preferred  Stock voting together as a
single class.

                  (c)  Mechanics of  Conversion.  Before any holder of Preferred
Stock shall be entitled  to convert the same into shares of Common  Stock,  such
holder shall surrender the certificate or certificates therefor,  duly endorsed,
at the office of the  corporation  or of any  transfer  agent for the  Preferred
Stock and shall give written notice to the corporation at such office that he or
she elects to convert the same (except  that no such written  notice of election
to convert shall be necessary in the event of an automatic  conversion  pursuant
to  paragraph  3(b)  hereof).  The  corporation  shall,  as soon as  practicable
thereafter, issue and deliver at such office to such holder of Preferred Stock a
certificate  or  certificates  for the number of shares of Common Stock to which
such holder shall be entitled. Such conversion shall be deemed to have been made
immediately  before the close of business on the date of such  surrender  of the
shares  of  Preferred  Stock  to be  converted,  (except  that in the case of an
automatic  conversion  pursuant to paragraph  3(b)(i) such  conversion  shall be
deemed to have been made immediately before the closing of the offering referred
to in  paragraph  3(b)(i))  and the person or persons  entitled  to receive  the
shares of Common Stock  issuable upon such  conversion  shall be treated for all
purposes as the record  holder or holders of such shares of Common Stock at such
time.

                  (d) Fractional  Shares.  In lieu of any  fractional  shares to
which the holder of a series  Preferred Stock would  otherwise be entitled,  the
corporation shall pay cash equal to such fraction  multiplied by the fair market
value of one share of such series of Preferred  Stock as determined by the board
of directors of the corporation.

                  (e) Adjustment of Conversion  Price.  The Conversion  Price of
each series of Preferred  Stock shall be subject to adjustment from time to time
as follows:

                             (i) If the corporation shall issue any Common Stock
other than "Excluded  Stock",  as defined below,  for a consideration  per share
less than the Conversion Price of such series in effect immediately prior to the
issuance  of  such  Common  Stock  (excluding  stock  dividends,   subdivisions,
split-ups,  combinations  or dividend which are covered by paragraph  3(e)(iii),
(iv), (v) and (vi)),  the  Conversion  Price of such series in effect after each
such  issuance  shall  thereafter  (except as provided in this Section  3(e)) be
adjusted to a price equal to the quotient obtained by dividing:


                                       -4-



                                    (A)  an amount equal to the sum of

                                            (x) the  total  number  of shares of
Common Stock  outstanding  (including  any shares of Common Stock  issuable upon
conversion of the  Preferred  Stock,  or deemed to have been issued  pursuant to
subdivision (3) of this clause (i) and to clause (ii) below)  immediately  prior
to such  issuance  multiplied by the  Conversion  Price of such series in effect
immediately prior to such issuance, plus

                                            (y) the  consideration  received  by
the corporation upon such issuance, by

                                    (B) the  total  number  of  shares of Common
Stock outstanding (including any shares of Common Stock issuable upon conversion
of the Preferred Stock or deemed to have been issued pursuant to subdivision (3)
of this clause (i) and to clause (ii) below)  immediately prior to such issuance
plus the additional  shares of Common Stock deemed to be issued in such issuance
(but not including any additional  shares of Common Stock deemed to be issued as
a  result  of any  adjustment  in  the  Conversion  Price  resulting  from  such
issuance).

                                    For the  purposes of any  adjustment  of the
Conversion Price pursuant to this clause (i), the following  provisions shall be
applicable:

                                            (1) In the case of the  issuance  of
Common  Stock for cash,  the  consideration  shall be deemed to be the amount of
cash paid therefor after deducting any discounts or commissions paid or incurred
by the corporation in connection with the issuance and sale thereof.

                                            (2) In the case of the  issuance  of
Common  Stock for a  consideration  in whole or in part  other  than  cash,  the
consideration  other than cash  shall be deemed to be the fair value  thereof as
determined  by the board of directors of the  corporation,  in  accordance  with
generally accepted accounting treatment.

                                            (3) In the case of the  issuance  of
(i) options to  purchase or rights to  subscribe  for Common  Stock  (other than
Excluded   Stock),   (ii)  securities  by  their  terms  con  vertible  into  or
exchangeable for Common Stock (other than Excluded  Stock),  or (iii) options to
purchase or rights to subscribe for such convertible or exchangeable securities:

                                                     (A) the  aggregate  maximum
number of shares of Common Stock  deliverable  upon  exercise of such options to
purchase or rights to  subscribe  for Common  Stock shall be deemed to have been
issued at the time such  options or rights were  issued and for a  consideration
equal to the  consideration  (determined in the manner  provided in subdivisions
(1) and (2) above),  if any,  received by the  corporation  upon the issuance of
such options or rights plus the minimum  purchase price provided in such options
or rights for the Common Stock covered thereby;



                                       -5-



                                                     (B) the  aggregate  maximum
number of shares of Common Stock  deliverable  upon conversion of or in exchange
for any such  convertible or  exchangeable  securities,  or upon the exercise of
options to purchase or rights to subscribe for such  convertible or exchangeable
securities and  subsequent  conversion or exchange  thereof,  shall be deemed to
have been  issued at the time such  securities  were  issued or such  options or
rights were issued and for a consideration  equal to the consideration  received
by the  corporation  for any such  securities  and  related  options  or  rights
(excluding  any  cash  received  on  account  of  accrued  interest  or  accrued
dividends),  plus the  additional  consideration,  if any, to be received by the
corporation  upon the conversion or exchange of such  securities or the exercise
of any  related  options  or  rights  (the  consideration  in  each  case  to be
determined in the manner provided in subdivisions (1) and (2) above);

                                                     (C)  on any  change  in the
number of shares of Common Stock  deliverable  upon exercise of any such options
or rights or  conversion  of or exchange for such  convertible  or  exchangeable
securities,  or on any change in the  minimum  purchase  price of such  options,
rights  or  securities,  other  than a change  resulting  from the  antidilution
provisions of such options,  rights or securities,  the  Conversion  Price shall
forthwith be readjusted to such Conversion  Price as would have obtained had the
adjustment made upon (x) the issuance of such options,  rights or securities not
exercised, converted or exchanged prior to such change, as the case may be, been
made upon the basis of such change or (y) the options or rights  related to such
securities not converted or exchanged prior to such change,  as the case may be,
been made upon the basis of such change; and

                                                     (D)  on the  expiration  of
any such  options or rights,  the  termination  of any such rights to convert or
exchange or the expiration of any options or rights related to such  convertible
or exchangeable  securities,  the Conversion Price shall forthwith be readjusted
to such Conversion Price as would have obtained had the adjustment made upon the
issuance of such options,  rights,  convertible  or  exchangeable  securities or
options or rights related to such convertible or exchangeable securities, as the
case may be,  been  made upon the basis of the  issuance  of only the  number of
shares of Common  Stock  actually  issued upon the  exercise of such  options or
rights,  upon the  conversion or exchange of such  convertible  or  exchangeable
securities  or upon the  exercise  of the  options  or  rights  related  to such
convertible or exchangeable securities, as the case may be.

                            (ii)    "Excluded Stock" shall mean:

                                    (A)  all   shares   of   Common   Stock  and
securities convertible into Common Stock issued and outstanding on the date this
document is filed with the California Secretary of State;

                                    (B) all  shares of Common  Stock  into which
the shares of Preferred Stock are convertible;

                                    (C) all  shares  of  Common  Stock  or other
securities  to be issued  after the date of filing  these  Amended and  Restated
Articles to  consultants,  directors or employees of the  corporation  which are
approved by the board of directors of the corporation and any shares of Common


                                       -6-



Stock or other securities  currently  outstanding  repurchased from consultants,
directors or employees of the corporation;

                                    (D) all shares issued to equipment  lessors,
banks or financial institutions in connection with equipment financing, lines of
credit or similar transactions or shares issued in connection with a transaction
involving a technology license, distribution rights or similar rights.

                                All   outstanding   shares  of  Excluded   Stock
(including  shares  issuable upon  conversion  of the Preferred  Stock) shall be
deemed to be outstanding  for all purposes of the  computations  of subparagraph
3(e)(i) above.

                           (iii)  If  the  number  of  shares  of  Common  Stock
outstanding  at any time after the date hereof is increased by a stock  dividend
payable in shares of Common Stock or by a  subdivision  or split-up of shares of
Common  Stock,  then,  on the  date  such  payment  is made or  such  change  is
effective,  the Conversion  Price shall be  appropriately  decreased so that the
number of shares of Common Stock  issuable on conversion of the Preferred  Stock
shall be increased in proportion to such increase of outstanding shares.

                           (iv)  If  the  number  of  shares  of  Common   Stock
outstanding  at any time after the date hereof is decreased by a combination  of
the  outstanding  shares of Common Stock,  then,  on the effective  date of such
combination,  the Conversion Price shall be appropriately  increased so that the
number of shares of Common Stock  issuable on conversion of the Preferred  Stock
shall be decreased in proportion to such decrease in outstanding shares.

                           (v) In case  the  corporation  shall  declare  a cash
dividend upon its Common Stock payable  otherwise than out of retained  earnings
or shall  distribute  to holders of its Common Stock shares of its capital stock
(other than Common Stock), stock or other securities of other persons, evidences
of indebtedness  issued by the corporation or other persons,  assets  (excluding
cash dividends) or options or rights  (excluding  options to purchase and rights
to subscribe for Common Stock or other securities of the corporation convertible
into or exchangeable for Common Stock),  then, in each such case, the holders of
Preferred  Stock shall,  concurrent  with the  distribution to holders of Common
Stock,  receive a like  distribution  based  upon the number of shares of Common
Stock into which the Series A Preferred or Series B  Preferred,  as the case may
be, is then convertible.

                           (vi) In case,  at any time after the date hereof,  of
any  capital  reorganization,  or  any  reclassification  of  the  stock  of the
corporation (other than as a result of a stock dividend or subdivision, split-up
or combination of shares),  or the  consolidation  or merger of the  corporation
with or into another person (other than a  consolidation  or merger in which the
corporation is the continuing  entity and which does not result in any change in
the Common Stock),  or of the sale or other  disposition of all or substantially
all the properties and assets of the corporation,  the shares of Preferred Stock
shall, after such reorganization, reclassification,  consolidation, merger, sale
or other disposition, be convertible into the kind and number of shares of stock
or other  securities or property of the  corporation  or otherwise to which such
holder would have been entitled if immediately prior to such reorganization,


                                       -7-


reclassification,  consolidation,  merger, sale or other disposition such holder
had  converted  his or her shares of  Preferred  Stock into  Common  Stock.  The
provisions   of  this  clause   (vi)  shall   similarly   apply  to   successive
reorganizations,  reclassifications,  consolidations,  mergers,  sales  or other
dispositions.

                           (vii) All  calculations  under  this  paragraph  3(e)
shall be made to the nearest cent or to the nearest one  hundredth  (1/100) of a
share, as the case may be.

                  (f) Minimal Adjustments. No adjustment in the Conversion Price
need be made if such adjustment would result in a change in the Conversion Price
of less than $0.01. Any adjustment of less than $0.01 which is not made shall be
carried  forward  and  shall  be  made  at the  time of and  together  with  any
subsequent  adjustment which, on a cumulative basis, amounts to an adjustment of
$0.01 or more in the Conversion Price.

                  (g) No  Impairment.  The  corporation  will not,  through  any
reorganization,  recapitalization,  transfer of assets,  consolidation,  merger,
dissolution, issue or sale of securities or any other voluntary action, avoid or
seek to avoid the  observance or  performance of any of the terms to be observed
or performed  hereunder by the corporation,  but will at all times in good faith
assist in the carrying out of all the  provisions of this paragraph 3 and in the
taking of all such action as may be necessary or appropriate in order to protect
the Conversion Rights of the holders of the Preferred Stock against  impairment.
This provision shall not restrict the corporation's  right to amend its Articles
of Incorporation with the requisite shareholder consent.

                  (h) Certificate as to Adjustments. Upon the occurrence of each
adjustment or  readjustment of the Conversion Rate pursuant to this paragraph 3,
the  corporation  at its expense  shall  promptly  compute  such  adjustment  or
readjustment in accordance with the terms hereof and prepare and furnish to each
holder of  Preferred  Stock a  certificate  setting  forth  such  adjustment  or
readjustment  and  showing in detail the facts  upon  which such  adjustment  or
readjustment is based. The corporation  shall,  upon written request at any time
of any  holder of  Preferred  Stock,  furnish or cause to be  furnished  to such
holder a like certificate  setting forth (i) such adjustments and readjustments,
(ii) the Conversion  Rate at the time in effect,  and (iii) the number of shares
of Common  Stock and the  amount,  if any, of other  property  which at the time
would be received upon the conversion of Preferred Stock.

                  (i) Notices of Record Date.  In the event of any taking by the
corporation  of a record  of the  holders  of any  class of  securities  for the
purpose of  determining  the  holders  thereof  who are  entitled to receive any
dividend  (other  than a cash  dividend)  or other  distribution,  any  right to
subscribe for, purchase or otherwise acquire any shares of stock of any class or
any other  securities or property or to receive any other right, the corporation
shall mail to each holder of Preferred  Stock at least twenty (20) days prior to
such record date, a notice specifying the date on which any such record is to be
taken for the purpose of such dividend or distribution or right,  and the amount
and character of such dividend, distribution or right.

                  (j)  Reservation  of  Stock  Issuable  Upon  Conversion.   The
corporation  shall at all times reserve and keep available out of its authorized
but unissued shares of Common Stock solely for the


                                       -8-



purpose of effecting the  conversion  of the shares of the Preferred  Stock such
number of its shares of Common Stock as shall from time to time be sufficient to
effect the conversion of all outstanding  shares of the Preferred  Stock; and if
at any time the number of authorized  but unissued  shares of Common Stock shall
not be sufficient to effect the conversion of all then outstanding shares of the
Preferred  Stock, the corporation will take such corporate action as may, in the
opinion of its counsel,  be necessary  to increase its  authorized  but unissued
shares of Common Stock to such number of shares as shall be sufficient  for such
purpose.

                  (k) Notices.  Any notice  required by the  provisions  of this
paragraph 3 to be given to the holder of shares of the Preferred  Stock shall be
deemed given if  deposited  in the United  States  mail,  postage  prepaid,  and
addressed to each holder of record at his address  appearing on the books of the
corporation.

         4. Voting Rights.  The holder of each share of Preferred Stock shall be
entitled  to the number of votes  equal to the number of shares of Common  Stock
into which each share of  Preferred  Stock could be converted on the record date
for the vote or consent of  shareholders  and,  except as otherwise  required by
law,  shall have voting  rights and powers equal to the voting rights and powers
of the  Common  Stock.  The  holder of each share of  Preferred  Stock  shall be
entitled to notice of any shareholders' meeting in accordance with the bylaws of
the  corporation  and shall  vote with  holders  of the  Common  Stock  upon the
election  of  directors  and  upon  any  other  matter  submitted  to a vote  of
shareholders,  except those  matters  required by law to be submitted to a class
vote.  Fractional  votes shall not,  however,  be permitted  and any  fractional
voting rights resulting from the above formula (after  aggregating all shares of
Common Stock into which  shares of Preferred  Stock held by each holder could be
converted)  shall be rounded to the nearest whole number (with one-half  rounded
upward to one).

         5.       Protective Provisions.

                  (a) Preferred  Stock. In addition to any other rights provided
by law, so long as any Preferred  Stock shall be  outstanding,  the  corporation
shall not without  first  obtaining  the approval of the holders of more than 50
percent of all outstanding series of Preferred Stock voting together as a single
class:

                             (i)  Change  the  authorized  number  of  shares of
Preferred Stock;

                             (ii) Alter or change  the  rights,  preferences  or
privileges of the Preferred Stock materially and adversely; or

                             (iii)  Create  any  new  class  of  shares   having
preference over or being on parity with the Preferred Stock.

         6. Residual  Rights.  All rights accruing to the outstanding  shares of
the  corporation  not  expressly  provided for to the  contrary  herein shall be
vested with the Common Stock.



                                       -9-


                                       V.

         1. Limitation of Directors'  Liability.  The liability of the directors
of this  corporation  for monetary  damages  shall be  eliminated to the fullest
extent permissible under California law.

         2.  Indemnification of Corporate Agents. This corporation is authorized
to indemnify the directors and officers of the corporation to the fullest extent
permissible under California law.

         3. Repeal or Modification.  Any repeal or modification of the foregoing
provisions  of  this  Article  V  shall  not  adversely   affect  any  right  of
indemnification  or  limitation  of  liability  of an agent of this  corporation
relating to acts or omissions occurring prior to such repeal or modification.


                                      * * *



                                      -10-


                                                                     EXHIBIT 3.2


                      RESTATED CERTIFICATE OF INCORPORATION
                                       OF
                            JENNER TECHNOLOGIES, INC.


         Jenner Technologies,  Inc., a corporation  organized and existing under
the laws of the State of Delaware, hereby certifies as follows:

         A.  The name of the  Corporation  is  Jenner  Technologies,  Inc..  The
Corporation  was  originally  incorporated  under the same name and the original
Certificate  of  Incorporation  of the  Corporation  was filed with the Delaware
Secretary of State on January 23, 1997.

         B. Pursuant to Sections 242 and 245 of the General  Corporation  Law of
the State of Delaware,  this Restated Certificate of Incorporation  restates and
amends the provisions of the Certificate of Incorporation of this Corporation.

         C. The text of the Certificate of  Incorporation  is hereby amended and
restated in its entirety
to read as follows:

                                    ARTICLE I

         The  name  of  the  corporation  is  Jenner  Technologies,   Inc.  (the
"Corporation").

                                   ARTICLE II

         The  address  of the  Corporation's  registered  office in the State of
Delaware  is 1209  Orange  Street,  City of  Wilmington,  County of New  Castle,
Delaware  19801.  The  name  of its  registered  agent  at such  address  is The
Corporation Trust Company.

                                   ARTICLE III

         The  purpose  of the  Corporation  is to  engage in any  lawful  act or
activity for which  corporations may be organized under the General  Corporation
Law of Delaware.

                                   ARTICLE IV

         The  Corporation  is authorized to issue two classes of shares of stock
to be designated,  respectively,  Common Stock,  $0.001 par value, and Preferred
Stock,  $0.001 par value.  The total  number of shares that the  Corporation  is
authorized to issue is 35,000,000  shares.  The number of shares of Common Stock
authorized is 30,000,000.  The number of shares of Preferred Stock authorized is
5,000,000.






         The  Preferred  Stock  may be  issued  from time to time in one or more
series  pursuant to a resolution  or  resolutions  providing for such issue duly
adopted by the Board of Directors  (authority  to do so being  hereby  expressly
vested in the board).  The Board of Directors is further authorized to determine
or alter the rights,  preferences,  privileges  and  restrictions  granted to or
imposed upon any wholly unissued series of Preferred Stock and to fix the number
of  shares of any  series of  Preferred  Stock and the  designation  of any such
series of  Preferred  Stock.  The Board of  Directors,  within  the  limits  and
restrictions  stated in any  resolution or resolutions of the Board of Directors
originally fixing the number of shares  constituting any series, may increase or
decrease  (but  not  below  the  number  of  shares  in  any  such  series  then
outstanding)  the  number  of shares of any  series  subsequent  to the issue of
shares of that series.

         The authority of the Board of Directors with respect to each such class
or series shall  include,  without  limitation  of the  foregoing,  the right to
determine and fix:

                  (a) the  distinctive  designation  of such class or series and
the number of shares to constitute such class or series;

                  (b) the rate at which dividends on the shares of such class or
series shall be declared and paid, or set aside for payment,  whether  dividends
at the rate so  determined  shall be  cumulative  or  accruing,  and whether the
shares of such class or series shall be entitled to any  participating  or other
dividends in addition to dividends at the rate so determined, and if so, on what
terms;

                  (c) the right or  obligation,  if any, of the  corporation  to
redeem  shares of the  particular  class or series of  Preferred  Stock and,  if
redeemable, the price, terms and manner of such redemption;

                  (d) the special and relative rights and  preferences,  if any,
and the amount or amounts per share, which the shares of such class or series of
Preferred  Stock shall be entitled to receive upon any voluntary or  involuntary
liquidation, dissolution or winding up of the Corporation;

                  (e) the terms and  conditions,  if any,  upon which  shares of
such class or series shall be convertible  into, or exchangeable  for, shares of
capital stock of any other class or series, including the price or prices or the
rate or rates of conversion or exchange and the terms of adjustment, if any;

                  (f) the  obligation,  if any,  of the  corporation  to retire,
redeem or purchase  shares of such class or series pursuant to a sinking fund or
fund of a similar  nature or  otherwise,  and the terms and  conditions  of such
obligation;

                  (g) voting  rights,  if any,  on the  issuance  of  additional
shares of such  class or series  or any  shares of any other  class or series of
Preferred Stock;

                  (h) limitations,  if any, on the issuance of additional shares
of such class or series or any shares of any other class or series of  Preferred
Stock; and



                                       -2-



                  (i) such other preferences, powers, qualifications, special or
relative  rights  and  privileges  thereof  as the  Board  of  Directors  of the
corporation,   acting  in   accordance   with  this  Restated   Certificate   of
Incorporation,  may deem  advisable  and are not  inconsistent  with law and the
provisions of this Restated Certificate of Incorporation.

                                    ARTICLE V

         The Corporation  reserves the right to amend, alter,  change, or repeal
any provision contained in this Certificate of Incorporation,  in the manner now
or  hereafter   prescribed  by  statute,  and  all  rights  conferred  upon  the
stockholders herein are granted subject to this right.

                                   ARTICLE VI

         The Corporation is to have perpetual existence.

                                   ARTICLE VII

         1.  Limitation of  Liability.  To the fullest  extent  permitted by the
General  Corporation  Law of the State of  Delaware as the same exists or as may
hereafter  be amended,  a director of the  Corporation  shall not be  personally
liable to the Corporation or its stockholders for monetary damages for breach of
fiduciary duty as a director.

         2. Indemnification. The Corporation may indemnify to the fullest extent
permitted by law any person made or  threatened  to be made a party to an action
or proceeding,  whether criminal,  civil,  administrative  or investigative,  by
reason of the fact that such person or his or her  testator or  intestate  is or
was a director,  officer or employee of the  Corporation,  or any predecessor of
the  Corporation,  or serves or served at any other  enterprise  as a  director,
officer or employee at the request of the  Corporation or any predecessor to the
Corporation.

         3.  Amendments.  Neither any  amendment nor repeal of this Article VII,
nor  the  adoption  of  any  provision  of  the  Corporation's   Certificate  of
Incorporation  inconsistent with this Article VII, shall eliminate or reduce the
effect of this Article VII, in respect of any matter occurring, or any action or
proceeding  accruing or arising or that,  but for this Article VII, would accrue
or arise,  prior to such  amendment,  repeal,  or  adoption  of an  inconsistent
provision.

                                  ARTICLE VIII

         In the event  any  shares  of  Preferred  Stock  shall be  redeemed  or
converted  pursuant to the terms  hereof,  the shares so  converted  or redeemed
shall not revert to the status of authorized  but unissued  shares,  but instead
shall be canceled and shall not be re-issuable by the Corporation.


                                       -3-



                                   ARTICLE IX

         Holders of stock of any class or series of this  corporation  shall not
be entitled to cumulate  their votes for the  election of directors or any other
matter submitted to a vote of the stockholders.

                                    ARTICLE X

         1. Number of Directors.  The number of directors which  constitutes the
whole Board of Directors of the corporation shall be designated in the Bylaws of
the corporation.

         2. Election of Directors. Elections of directors need not be by written
ballot unless the Bylaws of the corporation shall so provide.

                                   ARTICLE XI

         In  furtherance  and  not in  limitation  of the  powers  conferred  by
statute, the Board of Directors is expressly authorized to make, alter, amend or
repeal the Bylaws of the corporation.

                                   ARTICLE XII

         No action shall be taken by the stockholders of the corporation  except
at an annual or special  meeting of the  stockholders  called in accordance with
the Bylaws and no action shall be taken by the  stockholders by written consent.
The affirmative  vote of sixty-six and two-thirds  percent (66 2/3%) of the then
outstanding  voting  securities of the corporation,  voting together as a single
class,  shall be  required  for the  amendment,  repeal or  modification  of the
provisions of Article IX, Article X or Article XII of this Restated  Certificate
of  Incorporation  or Sections 2.3  (Special  Meeting),  2.5 (Advance  Notice of
Stockholder   Nominees  and   Stockholder   Business),   2.9  (Voting)  or  2.12
(Stockholder  Action by Written Consent Without a Meeting) of the  Corporation's
Bylaws.

                                  ARTICLE XIII

         Meetings  of  stockholders  may be held  within or without the State of
Delaware,  as the Bylaws may provide.  The books of the  Corporation may be kept
(subject to any  provision  contained in the  statutes)  outside of the State of
Delaware at such place or places as may be  designated  from time to time by the
Board of Directors or in the Bylaws of the Corporation.

         In witness  whereof,  the Corporation has caused this Certificate to be
signed  by  Anthony  E.  Maida  III,  its  Chief   Executive   Officer,   as  of
_________________, 1997.



                                  _____________________________________________
                                  Anthony E. Maida III, Chief Executive Officer


                                       -4-


         
                                     BYLAWS

                                       OF

                               JENNER TECHNOLOGIES



<TABLE>
<CAPTION>
<S>                                                                             <C>    
ARTICLE I - CORPORATE OFFICES....................................................1

         1.1      PRINCIPAL OFFICE...............................................1
         1.2      OTHER OFFICES..................................................1

ARTICLE II - MEETINGS OF SHAREHOLDERS............................................1

         2.1      PLACE OF MEETINGS..............................................1
         2.2      ANNUAL MEETING.................................................1
         2.3      SPECIAL MEETING................................................2
         2.4      NOTICE OF SHAREHOLDERS' MEETINGS...............................2
         2.5      MANNER OF GIVING NOTICE; AFFIDAVIT OF NOTICE...................3
         2.6      QUORUM.........................................................4
         2.7      ADJOURNED MEETING; NOTICE......................................4
         2.8      VOTING.........................................................4
         2.9      VALIDATION OF MEETINGS; WAIVER OF NOTICE; CONSENT..............5
         2.10     SHAREHOLDER ACTION BY WRITTEN CONSENT WITHOUT
                           A MEETING.............................................6
         2.11     RECORD DATE FOR SHAREHOLDER NOTICE; VOTING; GIVING
                           CONSENTS..............................................7
         2.12     PROXIES........................................................8
         2.13     INSPECTORS OF ELECTION.........................................8

ARTICLE III - DIRECTORS..........................................................9

         3.1      POWERS.........................................................9
         3.2      NUMBER OF DIRECTORS............................................9
         3.3      ELECTION AND TERM OF OFFICE OF DIRECTORS......................10
         3.4      RESIGNATION AND VACANCIES.....................................10
         3.5      PLACE OF MEETINGS; MEETINGS BY TELEPHONE......................11
         3.6      REGULAR MEETINGS..............................................11
         3.7      SPECIAL MEETINGS; NOTICE......................................11
         3.8      OUORUM........................................................12
         3.9      WAIVER OF NOTICE..............................................12
         3.10     ADJOURNMENT...................................................13
         3.11     NOTICE OF ADJOURNMENT.........................................13
         3.12     BOARD ACTION BY WRITTEN CONSENT WITHOUT A MEETING.............13
         3.13     FEES AND COMPENSATION OF DIRECTORS............................13
         3.14     APPROVAL OF LOANS TO OFFICERS.................................13

ARTICLE IV - COMMITTEES.........................................................14

         4.1      COMMITTEES OF DIRECTORS.......................................14
         4.2      MEETINGS AND ACTION OF COMMITTEE..............................15




                                       -i-






ARTICLE V - OFFICERS............................................................15

         5.1      OFFICERS......................................................15
         5.2      ELECTION OF OFFICERS..........................................15
         5.3      SUBORDINATE OFFICERS..........................................16
         5.4      REMOVAL AND RESIGNATION OF OFFICERS...........................16
         5.5      VACANCIES IN OFFICES..........................................16
         5.6      CHAIRMAN OF THE BOARD.........................................16
         5.7      PRESIDENT.....................................................17
         5.8      VICE PRESIDENTS...............................................17
         5.9      SECRETARY.....................................................17
         5.10     CHIEF FINANCIAL OFFICER.......................................18

ARTICLE VI - INDEMNIFICATION OF DIRECTORS, OFFICERS, EMPLOYEES,
                           AND OTHER AGENTS.....................................18

         6.1      INDEMNIFICATION OF DIRECTORS AND OFFICERS.....................18
         6.2      INDEMNIFICATION OF OTHERS.....................................19
         6.3      PAYMENT OF EXPENSES IN ADVANCE................................19
         6.4      INDEMNITY NOT EXCLUSIVE.......................................19
         6.5      INSURANCE INDEMNIFICATION.....................................20
         6.6      CONFLICTS.....................................................20

ARTICLE VII - RECORDS AND REPORTS...............................................20

         7.1      MAINTENANCE AND INSPECTION OF SHARE REGISTER..................20
         7.2      MAINTENANCE AND INSPECTION OF BYLAWS..........................21
         7.3      MAINTENANCE AND INSPECTION OF OTHER CORPORATE RECORDS.........21
         7.4      INSPECTION BY DIRECTORS.......................................22
         7.5      ANNUAL REPORT TO SHAREHOLDERS; WAIVER.........................22
         7.6      FINANCIAL STATEMENTS..........................................22
         7.7      REPRESENTATION OF SHARES OF OTHER CORPORATIONS................23

ARTICLE VIII - GENERAL MATTERS..................................................23

         8.1      RECORD DATE FOR PURPOSES OTHER THAN NOTICE AND VOTING ........23
         8.2      CHECKS; DRAFTS; EVIDENCES OF INDEBTEDNESS.....................24
         8.3      CORPORATE CONTRACTS AND INSTRUMENTS: HOW EXECUTED.............24
         8.4      CERTIFICATES FOR SHARES.......................................24
         8.5      LOST CERTIFICATES.............................................25
         8.6      CONSTRUCTION; DEFINITIONS.....................................25

ARTICLE IX - AMENDMENTS.........................................................25

         9.1      AMENDMENT BY SHAREHOLDERS.....................................25
         9.2      AMENDMENT BY DIRECTORS........................................25

</TABLE>


                                      -ii-






                                     BYLAWS

                                       OF

                               JENNER TECHNOLOGIES

                                    ARTICLE I

                                CORPORATE OFFICES

         1.1      PRINCIPAL OFFICE

         The  board  of  directors  shall  fix  the  location  of the  principal
executive  office of the corporation at any place within or outside the State of
California.  If the principal executive office is located outside such state and
the corporation has one or more business  offices in such state,  then the board
of directors shall fix and designate a principal business office in the State of
California.

         1.2      OTHER OFFICES

         The board of directors may at any time establish  branch or subordinate
offices  at any  place or  places  where  the  corporation  is  qualified  to do
business.


                                   ARTICLE II

                            MEETINGS OF SHAREHOLDERS

         2.1      PLACE OF MEETINGS

         Meetings of  shareholders  shall be held at any place within or outside
the State of California designated by the board of direc tors. In the absence of
any such  designation,  shareholders'  meetings  shall be held at the  principal
executive office of the corporation.

         2.2      ANNUAL MEETING

         The annual  meeting of  shareholders  shall be held each year on a date
and at a time  designated  by the board of  directors.  In the  absence  of such
designation,  the  annual  meeting  of  shareholders  shall be held on the first
Thursday  of April in each year at 10:00  A.M.  However,  if such day falls on a
legal holiday,  then the meeting shall be held at the same time and place on the
next





succeeding full business day. At the meeting,  directors  shall be elected,  and
any other proper business may be transacted.

         2.3      SPECIAL MEETING

         A special meeting of the  shareholders may be called at any time by the
board of directors,  or by the chairman of the board, or by the president, or by
one or more  shareholders  holding shares in the aggregate  entitled to cast not
less than ten percent (10%) of the votes at that meeting.

         If a special  meeting is called by any person or persons other than the
board of  directors  or the  president  or the  chairman of the board,  then the
request shall be in writing, specifying the time of such meeting and the general
nature  of the  business  proposed  to be  transacted,  and  shall be  delivered
personally  or sent by  registered  mail or by  telegraphic  or other  facsimile
transmission to the chairman of the board, the president,  any vice president or
the secretary of the corporation.  The officer receiving the request shall cause
notice to be promptly given to the shareholders enti tled to vote, in accordance
with the provisions of Sections 2.4 and 2.5 of these bylaws, that a meeting will
be held at the time requested by the person or persons  calling the meeting,  so
long as that time is not less than  thirty-five  (35) nor more than  sixty  (60)
days after the receipt of the request.  If the notice is not given within twenty
(20) days after  receipt of the request,  then the person or persons  requesting
the meeting may give the notice.  Nothing  contained  in this  paragraph of this
Section 2.3 shall be construed as limiting,  fixing or affecting the time when a
meeting of shareholders called by action of the board of directors may be held.

         2.4      NOTICE OF SHAREHOLDERS' MEETINGS

         All  notices of  meetings of  shareholders  shall be sent or  otherwise
given in accordance with Section 2.5 of these bylaws not less than ten (10) (or,
if sent by  third-class  mail  pursuant to Section 2.5 of these  bylaws,  thirty
(30)) nor more than sixty (60) days before the date of the  meeting.  The notice
shall specify the place,  date,  and hour of the meeting and (i) in the case o a
special  meeting,  the  general  nature of the  business  to be trans  acted (no
business  other than that  specified in the notice may be transacted) or (ii) in
the case of the annual meeting,  those matters which the board of directors,  at
the time of giving the notice, intends to present for action by the shareholders
(but  subject to the  provisions  of the next  paragraph of this Section 2.4 any
proper  matter may be presented at the meeting for such  action).  The notice of
any meeting at which directors are to be elected


                                       -2-





shall  include  the name of any  nominee  or  nominees  who,  at the time of the
notice, the board intends to present for election.

         If action is proposed to be taken at any meeting for  approval of (i) a
contract or transaction  in which a director has a direct or indirect  financial
interest,  pursuant to Section 310 of the Cor porations Code of California  (the
"Code"), (ii) an amendment of the articles of incorporation, pursuant to Section
902 of the Code, (iii) a reorganization of the corporation,  pursuant to Section
1201 of the Code, (iv) a voluntary dissolution of the corporation,  pur suant to
Section 1900 of the Code, or (v) a  distribution  in dis solution  other than in
accordance with the rights of outstanding preferred shares,  pursuant to Section
2007 of the Code,  then the notice  shall also state the general  nature of that
proposal.

         2.5      MANNER OF GIVING NOTICE; AFFIDAVIT OF NOTICE

         Written notice of any meeting of shareholders shall be given either (i)
personally or (ii) by first-class  mail or (iii) by third-class mail but only if
the corporation  has outstanding  shares held of record by five hundred (500) or
more persons  (determined  as provided in Section 605 of the Code) on the record
date for the shareholders'  meeting, or (iv) by telegraphic or other written com
munication.  Notices not personally  delivered shall be sent charges prepaid and
shall  be  addressed  to the  shareholder  at the  address  of that  shareholder
appearing on the books of the  corporation  or given by the  shareholder  to the
corporation  for the  purpose  of  notice.  If no such  address  appears  on the
corporation's  books or is given,  notice  shall be deemed to have been given if
sent to that share holder by mail or telegraphic or other written  communication
to the corporation's  principal  executive office, or if published at least once
in a  newspaper  of  general  circulation  in the county  where  that  office is
located.  Notice  shall be deemed to have been given at the time when  delivered
personally  or  deposited  in the mail or sent by  telegram  or  other  means of
written communication.

         If any  notice  addressed  to a  shareholder  at the  address  of  that
shareholder  appearing  on the  books  of the  corporation  is  returned  to the
corporation  by the United  States  Postal  Service  marked to indicate that the
United States Postal Service is unable to deliver the notice to the  shareholder
at that address, then all future notices or reports shall be deemed to have been
duly  given  without  further  mailing  if the same  shall be  available  to the
shareholder  on written  demand of the  shareholder  at the principal  executive
office  of the  corporation  for a period  of one (1) year  from the date of the
giving of the notice.



                                       -3-





         An  affidavit of the mailing or other means of giving any notice of any
shareholders'  meeting,  executed by the secretary,  assistant  secretary or any
transfer  agent of the  corporation  giving  the  notice,  shall be prima  facie
evidence of the giving of such notice.

         2.6      QUORUM

         The presence in person or by proxy of the holders of a major ity of the
shares  entitled to vote thereat  constitutes  a quorum for the  transaction  of
business at all meetings of  shareholders.  The  shareholders  present at a duly
called or held  meeting at which a quorum is present may continue to do business
until  adjournment,  notwithstanding  the withdrawal of enough  shareholders  to
leave less than a quorum,  if any  action  taken  (other  than  adjournment)  is
approved by at least a majority of the shares required to constitute a quorum.

         2.7      ADJOURNED MEETING; NOTICE

         Any shareholders' meeting,  annual or special,  whether or not a quorum
is present,  may be  adjourned  from time to time by the vote of the majority of
the shares  represented  at that meeting,  either in person or by proxy.  In the
absence of a quorum, no other busi ness may be transacted at that meeting except
as provided in Section 2.6 of these bylaws.

         When  any  meeting  of  shareholders,  either  annual  or  special,  is
adjourned  to another time or place,  notice need not be given of the  adjourned
meeting  if the time  and  place  are  announced  at the  meet ing at which  the
adjournment is taken. However, if a new record date for the adjourned meeting is
fixed or if the  adjournment is for more than forty-five (45) days from the date
set for the origi nal meeting,  then notice of the  adjourned  meeting  shall be
given.  Notice of any such adjourned meeting shall be given to each share holder
of record  entitled  to vote at the  adjourned  meeting in  accordance  with the
provisions of Sections 2.4 and 2.5 of these bylaws. At any adjourned meeting the
corporation  may transact any business  which might have been  transacted at the
original meeting.

         2.8      VOTING

         The shareholders entitled to vote at any meeting of share holders shall
be determined in accordance with the provisions of Section 2.11 of these bylaws,
subject to the  provisions of Sections 702 through 704 of the Code  (relating to
voting  shares held by a  fiduciary,  in the name of a  corporation  or in joint
ownership).


                                       -4-





         The  shareholders'  vote may be by voice vote or by ballot;  pro vided,
however,  that any election for  directors  must be by ballot if demanded by any
shareholder at the meeting and before the voting has begun.

         Except as provided in the last paragraph of this Section 2.8, or as may
be otherwise provided in the articles of incorporation,  each outstanding share,
regardless of class, shall be entitled to one vote on each matter submitted to a
vote of the  shareholders.  Any  shareholder  entitled to vote on any matter may
vote part of the shares in favor of the  proposal  and  refrain  from voting the
remain ing shares or, except when the matter is the election of  directors,  may
vote them against the  proposal;  but, if the  shareholder  fails to specify the
number  of shares  which the  shareholder  is voting  affirmatively,  it will be
conclusively  presumed that the share holder's approving vote is with respect to
all shares which the shareholder is entitled to vote.

         If a quorum is present,  the  affirmative  vote of the  majority of the
shares  represented  and  voting at a duly held  meeting  (which  shares  voting
affirmatively  also constitute at least a majority of the required quorum) shall
be the act of the shareholders, unless the vote of a greater number or a vote by
classes is required by the Code or by the articles of incorporation.

         At a  shareholders'  meeting at which  directors  are to be elec ted, a
shareholder  shall be entitled to cumulate votes (i.e., cast for any candidate a
number of votes greater than the number of votes which such shareholder normally
is entitled  to cast) if the  candidates'  names have been placed in  nomination
prior to commence ment of the voting and the  shareholder has given notice prior
to commencement of the voting of the shareholder's intention to cumu late votes.
If any shareholder has given such a notice,  then every shareholder  entitled to
vote may cumulate  votes for  candidates in nomination  either (i) by giving one
candidate  a number of votes  equal to the  number of  directors  to be  elected
multiplied  by the  number  of votes  to which  that  shareholder's  shares  are
normally  entitled or (ii) by distributing the  shareholder's  votes on the same
principle  among any or all of the  candidates,  as the share holder thinks fit.
The  candidates  receiving the highest number of  affirmative  votes,  up to the
number of directors to be elected, shall be elected; votes against any candidate
and votes withheld shall have no legal effect.

         2.9      VALIDATION OF MEETINGS; WAIVER OF NOTICE; CONSENT

         The  transactions  of any  meeting of  shareholders,  either  annual or
special,  however called and noticed,  and wherever  held,  shall be as valid as
though they had been taken at a meeting duly held after


                                       -5-





regular  call and notice,  if a quorum be present  either in person or by proxy,
and if, either before or after the meeting,  each person  entitled to vote,  who
was not  present  in person or by proxy,  signs a written  waiver of notice or a
consent to the holding of the meet ing or an  approval  of the minutes  thereof.
The waiver of notice or consent or approval need not specify either the business
to  be  transacted  or  the  purpose  of  any  annual  or  special   meeting  of
shareholders,  except  that if  action  is taken  or  proposed  to be taken  for
approval of any of those  matters  specified in the second  paragraph of Section
2.4 of these bylaws, the waiver of notice or consent or approval shall state the
general nature of the proposal. All such waivers,  consents, and approvals shall
be  filed  with  the  corporate  records  or made a part of the  minutes  of the
meeting.

         Attendance by a person at a meeting  shall also  constitute a waiver of
notice of and presence at that  meeting,  except when the person  objects at the
beginning of the meeting to the transaction of any business  because the meeting
is not lawfully called or con vened.  Attendance at a meeting is not a waiver of
any right to object to the  consideration  of matters required by the Code to be
included in the notice of the meeting but not so included,  if that objection is
expressly made at the meeting.

         2.10     SHAREHOLDER ACTION BY WRITTEN CONSENT WITHOUT A MEETING

         Any  action  which may be taken at any  annual or  special  meeting  of
shareholders  may be taken  without a meeting and  without  prior  notice,  if a
consent in writing,  setting forth the action so taken, is signed by the holders
of  outstanding  shares  having not less than the  minimum  number of votes that
would be  necessary  to  authorize or take that action at a meeting at which all
shares entitled to vote on that action were present and voted.

         In the case of election of directors, such a consent shall be effective
only if signed by the holders of all outstanding shares entitled to vote for the
election of directors.  However,  a direc tor may be elected at any time to fill
any  vacancy  on the board of  directors,  provided  that it was not  created by
removal of a direc tor and that it has not been filled by the directors,  by the
writ ten consent of the holders of a majority of the outstanding shares entitled
to vote for the election of directors.

         All such consents  shall be maintained  in the corporate  records.  Any
shareholder giving a written consent,  or the share holder's proxy holders, or a
transferee of the shares, or a per sonal  representative of the shareholder,  or
their respective proxy holders,  may revoke the consent by a writing received by
the secre tary of the corporation before written consents of the number of


                                       -6-





shares  required  to  authorize  the  proposed  action  have been filed with the
secretary.

         If the  consents  of all  shareholders  entitled  to vote have not been
solicited  in  writing  and  if  the  unanimous  written  consent  of  all  such
shareholders has not been received,  then the secretary shall give prompt notice
of the corporate  action approved by the  shareholders  without a meeting.  Such
notice  shall  be  given to  those  shareholders  entitled  to vote who have not
consented in writ ing and shall be given in the manner specified in Section 2. c
these bylaws. In the case of approval of (i) a contract or trans action in which
a director has a direct or indirect financial interest,  pursuant to Section 310
of the Code, (ii)  indemnification  of a corporate  "agent," pursuant to Section
317 of the Code, (iii) a reorganization of the corporation,  pursuant to Section
1201  of the  Code,  and  (iv) a  distribution  in  dissolution  other  than  in
accordance with the rights of outstanding preferred shares, pur suant to Section
2007 of the Code,  the notice  shall be given at least ten (10) days  before the
consummation of any action authorized by that approval.


         2.11     RECORD DATE FOR SHAREHOLDER NOTICE; VOTING; GIVING
                  CONSENTS

         For purposes of determining the shareholders  entitled to notice of any
meeting or to vote  thereat or  entitled  to give con sent to  corporate  action
without a meeting,  the board of directors  may fix, in advance,  a record date,
which  shall not be more than sixty (60) days nor less than ten (10) days before
the date of any such  meeting  nor more than  sixty  (60) days  before  any such
action without a meeting,  and in such event only  shareholders of record on the
date so fixed are  entitled  to notice and to vote or to give  consents,  as the
case may be,  notwithstanding  any  transfer  of any  shares on the books of the
corporation after the record date, except as otherwise provided in the Code.

         If the board of directors does not so fix a record date:

                  (a) the record date for determining  shareholders enti tled to
notice  of or to vote at a  meeting  of  shareholders  shall be at the  close of
business on the business day next preceding the day on which notice is given or,
if notice is waived, at the close of business on the business day next preceding
the day on which the meeting is held; and

                  (b) the record date for determining  shareholders enti tled to
give  consent to  corporate  action in writing  without a meet ing,  (i) when no
prior action by the board has been taken, shall be


                                       -7-




the day on which the first written  consent is given,  or (ii) when prior action
by the board has been  taken,  shall be at the close of  business  on the day on
which the board adopts the resolution relat ing to that action,  or the sixtieth
(60th) day before the date of such other action, whichever is later.

         The record date for any other  purpose  shall be as provided in Article
VIII of these bylaws.

         2.12     PROXIES

         Every person  entitled to vote for  directors,  or on any other matter,
shall  have  the  right  to do so  either  in  person  or by one or more  agents
authorized  by a written proxy signed by the person and filed with the secretary
of the corporation.  A proxy shall be deemed signed if the shareholder's name is
placed  on the proxy  (whether  by manual  signature,  typewriting,  telegraphic
transmission or otherwise) by the shareholder or the  shareholder's  attorney-in
fact. A validly executed proxy which does not state that it is irrevocable shall
continue in full force and effect  unless (i) the person who  executed the proxy
revokes  it  prior  to the  time  of vot  ing by  delivering  a  writing  to the
corporation-stating that the proxy is revoked or by executing a subsequent proxy
and presenting it to the meeting or by voting in person at the meeting,  or (ii)
written notice of the death or incapacity of the maker of that proxy is received
by the corporation before the vote pursuant to that proxy is counted;  provided,
however, that no proxy shall be valid after the expiration of eleven (11) months
from the date of the proxy,  unless  otherwise  provided in the proxy. The dates
con tained on the forms of proxy presumptively determine the order of execution,
regardless of the postmark dates on the envelopes in which they are mailed.  The
revocability of a proxy that states on its face that it is irrevocable  shall be
governed by the provisions of Sections 705(e) and 705(f) of the Code.

         2.13     INSPECTORS OF ELECTION

         Before any meeting of shareholders,  the board of directors may appoint
an  inspector  or  inspectors  of  election  to  act  at  the  meet  ing  or its
adjournment.  If no inspector of election is so appointed,  then the chairman of
the meeting may, and on the request of any shareholder or a shareholder's  proxy
shall, appoint an inspector or inspectors of election to act at the meeting. The
number of  inspectors  shall be either one (1) or three (3). If  inspectors  are
appointed at a meeting  pursuant to the request of one (1) or more  shareholders
or proxies, then the holders of a majority of shares or their proxies present at
the meeting shall  determine  whether one (1) or three (3)  inspectors are to be
appointed. If any person appointed as inspector fails to appear or


                                       -8-





fails or refuses to act,  then the  chairman  of the meeting  may,  and upon the
request of any shareholder or a shareholder's  proxy shall,  appoint a person to
fill that vacancy.

         Such inspectors shall:

                  (a) determine the number of shares  outstanding and the voting
power of each,  the number of shares  represented at the meet ing, the existence
of a quorum, and the authenticity, validity, and effect of proxies;

                  (b)      receive votes, ballots or consents;

                  (c)      hear and determine all challenges and questions in
any way arising in connection with the right to vote;

                  (d)      count and tabulate all votes or consents;

                  (e)      determine when the polls shall close;

                  (f)      determine the result; and

                  (g)      do any other acts that may be proper to conduct the
election or vote with fairness to all shareholders.


                                   ARTICLE III

                                    DIRECTORS

         3.1      POWERS

         Subject  to the  provisions  of the  Code  and any  limitations  in the
articles of  incorporation  and these bylaws  relating to action  required to be
approved by the  shareholders  or by the  outstanding  shares,  the business and
affairs of the  corporation  shall be managed and all corporate  powers shall be
exercised by or under the direction of the board of directors.

         3.2      NUMBER OF DIRECTORS

         The number of directors of the corporation  shall be not less than five
(5) nor more than nine (9). The exact number of directors shall be eight(8)until
changed,  within the limits  specified  above,  by a bylaw amending this Section
3.2,  duly  adopted  by the  board  of  directors  or by the  shareholders.  The
indefinite number of directors may be changed, or a definite number may be fixed
without  provision for an indefinite  number, by a duly adopted amendment to the
articles of incorporation or by an amendment to


                                       -9-




this bylaw duly adopted by the vote or written  consent of holders of a majority
of the outstanding shares entitled to vote; provided, however, that an amendment
reducing  the fixed  number or the minimum  number of directors to a number less
than five (5)  cannot be adopted if the votes cast  against  its  adoption  at a
meeting,  or the  shares  not  consenting  in the case of an action  by  written
consent,  are equal to more than sixteen and two-thirds percent (16-2/3%) of the
outstanding shares entitled to vote thereon.  No amendment may change the stated
maximum  number of authorized  directors to a number  greater than two (2) times
the stated minimum number of directors minus one (1).

         No  reduction  of the  authorized  number of  directors  shall have the
effect of removing any director before that director's term of office expires.

         3.3      ELECTION AND TERM OF OFFICE OF DIRECTORS

         Directors  shall be elected at each annual  meeting of share holders to
hold office until the next annual meeting.  Each direc tor, including a director
elected to fill a vacancy,  shall hold office until the  expiration  of the term
for which elected and until a successor has been elected and qualified.

         3.4      RESIGNATION AND VACANCIES

         Any  director  may resign  effective  on giving  written  notice to the
chairman of the board,  the president,  the secretary or the board of directors,
unless  the  notice  specifies  a later  time for  that  resignation  to  become
effective.  If the  resignation of a director is effective at a future time, the
board of  directors  may elect a successor  to take office when the  resignation
becomes effective.

         Vacancies in the board of directors may be filled by a major ity of the
remaining  directors,  even  if  less  than a  quorum,  or by a  sole  remaining
director; however, a vacancy created by the removal of a director by the vote or
written consent of the  shareholders or by court order may be filled only by the
affirmative  vote of a majority of the shares  represented  and voting at a duly
held meet ing at which a quorum is present  (which shares  voting  affirmatively
also constitute a majority of the required quorum),  or by the unanimous written
consent of all shares  entitled to vote thereon.  Each director so elected shall
hold  office  until the next  annual  meeting  of the  shareholders  and until a
successor has been elected and qualified.



                                      -10-





         A vacancy or  vacancies  in the board of  directors  shall be deemed to
exist (i) in the event of the death,  resignation  or  removal of any  director,
(ii) if the board of  directors by resolu tion  declares  vacant the office of a
director who has been declared of unsound mind by an order of court or convicted
of a felony,  (iii) if the authorized number of directors is increased,  or (iv)
if the  shareholders  fail, at any meeting of shareholders at which any director
or directors are elected, to elect the number of directors to be elected at that
meeting.

         The  shareholders may elect a director or directors at any time to fill
any vacancy or  vacancies  not filled by the  directors,  but any such  election
other than to fill a vacancy created by removal,  if by written  consent,  shall
require  the  consent of the  holders of a majority  of the  outstanding  shares
entitled to vote thereon.

         3.5      PLACE OF MEETINGS; MEETINGS BY TELEPHONE

         Regular  meetings  of the board of  directors  may be held at any place
within or outside the State of California  that has been designated from time to
time by resolution of the board.  In the absence of such a designation,  regular
meetings  shall be held at the principal  executive  office of the  corporation.
Special  meet ings of the board may be held at any place  within or outside  the
State of California that has been designated in the notice of the meeting or, if
not stated in the notice or if there is no notice,  at the  principal  executive
office of the corporation.

         Any meeting, regular or special, may be held by conference telephone or
similar communication  equipment, so long as all direc tors participating in the
meeting  can hear one  another;  and all such  directors  shall be  deemed to be
present in person at the meeting.

         3.6      REGULAR MEETINGS

         Regular  meetings of the board of directors may be held without  notice
if the times of such meetings are fixed by the board of directors.

         3.7      SPECIAL MEETINGS; NOTICE

         Special  meetings of the board of directors for any purpose or purposes
may be called at any time by the chairman of the board, the president,  any vice
president, the secretary or any two directors.



                                      -11-





         Notice of the time and place of  special  meetings  shall be  delivered
personally  or by  telephone  to each  director or sent by  first-class  mail or
telegram, charges prepaid, addressed to each director at that director's address
as it is shown on the records of the  corporation.  If the notice is mailed,  it
shall be deposited  in the United  States mail at least four (4) days before the
time of the holding of the meeting. If the notice is delivered  personally or by
telephone or telegram,  it shall be delivered  personally  or by telephone or to
the  telegraph  company at least  forty-eight  (48) hours before the time of the
holding of the meeting.  Any oral notice given personally or by telephone may be
communicated either to the director or to a person at the office of the director
who the person giving the notice has reason to believe will promptly communicate
it to the director.  The notice need not specify the purpose or the place of the
meeting,  if the meeting is to be held at the principal  executive office of the
corporation.

         3.8      OUORUM

         A majority of the  authorized  number of directors  shall consti tute a
quorum for the transaction of business, except to adjourn as provided in Section
3.10 of these  bylaws.  Every act or decision  done or made by a majority of the
directors  present at a duly held meeting at which a quorum is present  shall be
regarded  as the act of the board of  directors,  subject to the  provisions  of
Section 310 of the Code (as to approval of contracts or  transactions in which a
director has a direct or indirect material financial  interest),  Section 311 of
the Code (as to  appointment of  committees),  Section 317(e) of the Code (as to
indemnification  of  directors),  the  articles  of  incorporation,   and  other
applicable law.

         A meeting  at which a quorum  is  initially  present  may  continue  to
transact  business  notwithstanding  the withdrawal of directors,  if any action
taken is  approved  by at  least a  majority  of the  required  quorum  for that
meeting.

         3.9      WAIVER OF NOTICE

         Notice of a meeting  need not be given to any  director (i) who signs a
waiver of notice or a consent  to holding  the  meeting  or an  approval  of the
minutes  thereof,  whether before or after the meet ing, or (ii) who attends the
meeting without  protesting,  prior thereto or at its commencement,  the lack of
notice to such direc tors. All such waivers,  consents,  and approvals  shall be
filed with the corporate  records or made part of the minutes of the meeting.  A
waiver of notice need not specify the purpose of any regular or special  meeting
of the board of directors.



                                      -12-





         3.10     ADJOURNMENT

         A majority of the  directors  present,  whether or not consti  tuting a
quorum, may adjourn any meeting to another time and place.

         3.11     NOTICE OF ADJOURNMENT

         Notice of the time and place of holding an  adjourned  meeting need not
be given unless the meeting is adjourned for more than  twenty-four  (24) hours.
If the meeting is adjourned for more than twenty-four (24) hours, then notice of
the time and place of the adjourned  meeting shall be given before the adjourned
meeting takes place, in the manner specified in Section 3.7 of these bylaws,  to
the directors who were not present at the time of the adjournment.

         3.12     BOARD ACTION BY WRITTEN CONSENT WITHOUT A MEETING

         Any action  required or permitted to be taken by the board of directors
may be  taken  without  a  meeting,  provided  that  all  members  of the  board
individually or collectively  consent in writing to that action.  Such action by
written  consent shall have the same force and effect as a unanimous vote of the
board of directors.  Such written consent and any counterparts  thereof shall be
filed with the minutes of the proceedings of the board.

         3.13     FEES AND COMPENSATION OF DIRECTORS

         Directors and members of committees may receive such compen sation,  if
any, for their  services and such  reimbursement  of expenses as may be fixed or
determined by resolution of the board of directors.  This Section 3.13 shall not
be construed to preclude any director from serving the  corporation in any other
capacity as an officer,  agent, employee or otherwise and receiving compensation
for those services.

         3.14     APPROVAL OF LOANS TO OFFICERS*

         The corporation may, upon the approval of the board of directors alone,
make loans of money or property to, or guarantee the obligations of, any officer
of the  corporation or its parent or subsidiary,  whether or not a director,  or
adopt an employee  benefit plan or plans  authorizing  such loans or  guaranties
provided that (i) the board of directors determines that such a loan or guaranty
or plan  may  reasonably  be  expected  to  benefit  the  corporation,  (ii) the
corporation has outstanding shares held of record by 100

- -------------

         * This  section  is  effective  only  if it has  been  approved  by the
shareholders in accordance with Sections 315(b) and 152 of the Code.


                                      -13-





or more persons  (determined as provided in Section 605 of the Code) on the date
of approval by the board of  directors,  and (iii) the  approval of the board of
directors is by a vote  sufficient  without  counting the vote of any interested
director or directors.


                                   ARTICLE IV

                                   COMMITTEES

         4.1      COMMITTEES OF DIRECTORS

         The board of directors may, by resolution adopted by a major ity of the
authorized  number of  directors,  designate  one (1) or more  committees,  each
consisting of two or more directors,  to serve at the pleasure of the board. The
board may  designate  one (1) or more  directors  as  alternate  members  of any
committee,  who may replace any absent  member at any meeting of the  committee.
The appointment of members or alternate members of a committee requires the vote
of a majority of the  authorized  number of  directors.  Any  committee,  to the
extent provided in the resolution of the board,  shall have all the authority of
the board, except with respect to:

                  (a) the  approval of any action  which,  under the Code,  also
requires shareholders' approval or approval of the outstanding shares;

                  (b) the filling of  vacancies  on the board of directors or in
any committee;

                  (c) the fixing of  compensation  of the directors for serving,
on the board or any committee;

                  (d) the amendment or repeal of these bylaws or the adoption of
new bylaws;

                  (e) the amendment or repeal of any  resolution of the board of
directors which by its express terms is not so amendable or repealable;

                  (f) a distribution  to the  shareholders  of the corpora tion,
except at a rate or in a periodic  amount or within a price range  determined by
the board of directors; or

                  (g) the  appointment  of any other  committees of the board of
directors or the members of such committees.



                                      -14-




         4.2      MEETINGS AND ACTION OF COMMITTEE

         Meetings and actions of  committees  shall be governed by, and held and
taken in accordance with, the provisions of Article III of these bylaws, Section
3.5 (place of meetings),  Section 3.6 (regular  meetings),  Section 3.7 (special
meetings  and  notice),  Section 3.8  (quorum),  Section 3.9 (waiver of notice),
Section 3.10 (adjourn ment),  Section 3.11 (notice of adjournment),  and Section
3.12 (action without meeting),  with such changes in the context of those bylaws
as are  necessary to  substitute  the committee and its members for the board of
directors and its members; provided,  however, that the time of regular meetings
of committees  may be determined  either by resolution of the board of directors
or by resolution of the committee,  that special meetings of committees may also
be called by resolution  of the board of  directors,  and that notice of special
meetings of committees  shall also be given to all alternate mem bers, who shall
have the right to attend all meetings of the com mittee.  The board of directors
may adopt rules for the  government of any committee not  inconsistent  with the
provisions of these bylaws.


                                    ARTICLE V

                                    OFFICERS

         5.1      OFFICERS

         The officers of the corporation shall be a president, a secre tary, and
a chief financial  officer.  The corporation may also have, at the discretion of
the board of directors,  a chairman of the board,  one or more vice  presidents,
one or more assistant sec retaries,  one or more assistant treasurers,  and such
other officers as may be appointed in accordance  with the provisions of Section
5.3 of these bylaws. Any number of offices may be held by the same person.

         5.2      ELECTION OF OFFICERS

         The  officers  of  the  corporation,  except  such  officers  as may be
appointed in  accordance  with the  provisions  of Section 5.3 or Section 5.5 of
these bylaws, shall be chosen by the board, subject to the rights, if any, of an
officer under any contract of employment.


                                      -15-





         5.3      SUBORDINATE OFFICERS

         The board of directors  may  appoint,  or may empower the presi dent to
appoint,  such other  officers as the  business of the corpo ration may require,
each of whom shall hold office for such period, have such authority, and perform
such duties as are  provided in these  bylaws or as the board of  directors  may
from time to time determine.

         5.4      REMOVAL AND RESIGNATION OF OFFICERS

         Subject to the  rights,  if any,  of an officer  under any con tract of
employment,  any officer may be removed,  either with or without  cause,  by the
board of directors at any regular or special  meeting of the board or, except in
case of an officer  chosen by the board of  directors,  by any officer upon whom
such power of removal may be conferred by the board of directors.

         Any  officer  may  resign at any time by giving  written  notice to the
corporation.  Any  resignation  shall take  effect at the date of the receipt of
that notice or at any later time specified in that notice; and, unless otherwise
specified  in that  notice,  the  accep  tance of the  resignation  shall not be
necessary to make it effec tive.  Any  resignation  is without  prejudice to the
rights,  if any, of the corporation under any contract to which the officer is a
party.

         5.5      VACANCIES IN OFFICES

         A  vacancy  in any  office  because  of  death,  resignation,  removal,
disqualification  or any other cause shall be filled in the manner prescribed in
these bylaws for regular appointments to that office.

         5.6      CHAIRMAN OF THE BOARD

         The  chairman of the board,  if such an officer be elected,  shall,  if
present,  preside at meetings of the board of directors and exercise and perform
such other  powers and duties as may from time to time be assigned to him by the
board of  directors  or as may be  prescribed  by these  bylaws.  If there is no
president,  then the  chairman  of the board  shall also be the chief  executive
officer of the  corporation  and shall have the powers and duties  prescribed in
Section 5.7 of these bylaws.


                                      -16-





         5.7      PRESIDENT

         Subject  to such  supervisory  powers,  if any,  as may be given by the
board of directors  to the  chairman of the board,  if there be such an officer,
unless  otherwise  designated  by the board,  the  president  shall be the chief
executive  officer of the corporation  and shall,  subject to the control of the
board of  directors,  have general  supervision,  direction,  and control of the
business and the officers of the corporation. The president shall preside at all
meetings of the  shareholders  and, in the absence or nonexistence of a chairman
of the board,  at all meetings of the board of directors.  The  president  shall
have the general  powers and duties of manage ment usually  vested in the office
of  president of a  corporation,  and shall have such other powers and duties as
may be prescribed by the board of directors or these bylaws.

         5.8      VICE PRESIDENTS

         In the absence or disability of the president, the vice presi dents, if
any,  in order of their  rank as fixed  by the  board of  directors  or,  if not
ranked, a vice president designated by the board of directors, shall perform all
the duties of the president and when so acting shall have all the powers of, and
be subject to all the  restrictions  upon,  the president.  The vice  presidents
shall have such other  powers and perform such other duties as from time to time
may be prescribed for them respectively by the board of directors, these bylaws,
the president or the chairman of the board.

         5.9      SECRETARY

         The  secretary  shall  keep  or  cause  to be  kept,  at the  principal
executive  office  of the  corporation  or such  other  place  as the  board  of
directors  may  direct,  a book  of  minutes  of all  meetings  and  actions  of
directors,  committees of directors and shareholders. The minutes shall show the
time and place of each meeting, whether regular or special (and, if special, how
authorized  and the notice  given),  the names of those  present  at  directors'
meetings or com mittee meetings,  the number of shares present or represented at
shareholders' meetings, and the proceedings thereof.

         The  secretary  shall  keep,  or cause to be kept,  at the  princi  pal
executive  office  of the  corporation  or at the  office  of the  corporation's
transfer  agent or  registrar,  as  determined  by  resolu  tion of the board of
directors, a share register, or a duplicate share register, showing the names of
all shareholders  and their addresses,  the number and classes of shares held by
each, the number and date of certificates evidencing such shares, and the


                                      -17-





number  and  date  of   cancellation  of  every   certificate   surrendered  for
cancellation.

         The secretary shall give, or cause to be given,  notice of all meetings
of the shareholders and of the board of directors required to be given by law or
by these bylaws.  He shall keep the seal of the corporation,  if one be adopted,
in safe  custody and shall have such other  powers and perform such other duties
as may be prescribed by the board of directors or by these bylaws.

         5.10     CHIEF FINANCIAL OFFICER

         The chief  financial  officer shall keep and  maintain,  or cause to be
kept and  maintained,  adequate and correct books and records of accounts of the
properties and business transactions of the cor poration,  including accounts of
its  assets,  liabilities,  receipts,  disbursements,  gains,  losses,  capital,
retained  earnings,  and shares.  The books of account  shall at all  reasonable
times be open to inspection by any director.

         The chief financial officer shall deposit all money and other valuables
in the name and to the credit of the corporation  with such  depositories as may
be  designated  by the board of  directors.  He shall  disburse the funds of the
corporation  as may be ordered by the board of  directors,  shall  render to the
president  and direc tors,  whenever  they  request it, an account of all of his
trans actions as chief financial  officer and of the financial  condition of the
corporation,  and shall have such other  powers and perform such other duties as
may be prescribed by the board of directors or these bylaws.


                                   ARTICLE VI

               INDEMNIFICATION OF DIRECTORS, OFFICERS, EMPLOYEES,
                                AND OTHER AGENTS

         6.1      INDEMNIFICATION OF DIRECTORS AND OFFICERS

         The  corporation  shall,  to the  maximum  extent  and  in  the  manner
permitted by the Code,  indemnify  each of its  directors  and officers  against
expenses  (as  defined  in  Section  317(a) of the  Code),  judg  ments,  fines,
settlements,  and other amounts  actually and reason ably incurred in connection
with any  proceeding  (as  defined  in Section  317(a) of the Code),  arising by
reason of the fact that such person is or was an agent of the  corporation.  For
purposes of this  Article  VI, a  "director"  or  "officer"  of the  corporation
includes any person (i) who is or was a director or officer of the  corporation,
(ii) who is or was serving at the request of the


                                      -18-




corporation as a director or officer of another corporation,  partnership, joint
venture, trust or other enterprise,  or (iii) who was a director or officer of a
corporation which was a predecessor corporation of the corporation or of another
enterprise at the request of such predecessor corporation.


         6.2      INDEMNIFICATION OF OTHERS

         The  corporation  shall have the power, to the extent and in the manner
permitted by the Code, to indemnify each of its employees and agents (other than
directors and officers)  against  expenses (as defined in Section  317(a) of the
Code), judgments, fines, settle ments, and other amounts actually and reasonably
incurred in con nection with any proceeding (as defined in Section 317(a) of the
Code),  arising by reason of the fact that such person is or was an agent of the
corporation.  For  purposes  of this  Article  VI, an employee or "agent" of the
corporation (other than a director or officer) includes any person (i) who is or
was an employee or agent of the  corporation,  (ii) who is or was serving at the
request of the  corporation  as an  employee  or agent of  another  corporation,
partnership,  joint  venture,  trust or other  enterprise,  or (iii)  who was an
employee or agent of a corporation  which was a predecessor  corporation  of the
corporation  or of  another  enterprise  at  the  request  of  such  predecessor
corporation.

         6.3      PAYMENT OF EXPENSES IN ADVANCE

         Expenses  incurred  in  defending  any  civil  or  criminal  action  or
proceeding for which  indemnification is required pursuant to Section 6.1 or for
which   indemnification   is  permitted   pursuant  to  Section  6.2   following
authorization  thereof  by  the  Board  of  Direc  tors  shall  be  paid  by the
corporation  in advance of the final  disposition  of such action or  proceeding
upon  receipt  of an under  taking by or on behalf of the  indemnified  party to
repay such amount if it shall  ultimately  be  determined  that the  indemnified
party is not entitled to be indemnified as authorized in this Article VI.

         6.4      INDEMNITY NOT EXCLUSIVE

         The  indemnification  provided  by this  Article VI shall not be deemed
exclusive of any other rights to which those  seeking  indem  nification  may be
entitled  under any bylaw,  agreement,  vote of  shareholders  or  disinterested
directors  or  otherwise,  both as to action in an official  capacity  and as to
action in another  capacity  while holding such office,  to the extent that such
additional  rights  to  indemnification   are  authorized  in  the  Articles  of
Incorporation.


                                      -19-





         6.5      INSURANCE INDEMNIFICATION

         The corporation shall have the power to purchase and maintain insurance
on behalf of any person who is or was a director, offi cer, employee or agent of
the  corporation  against  any  liability  asserted  against or incurred by such
person in such capacity or arising out of such person's status as such,  whether
or not the  corporation  would  have the power to  indemnify  him  against  such
liability under the provisions of this Article VI.

         6.6      CONFLICTS

         No  indemnification  or advance  shall be made under this  Article  VI,
except  where such  indemnification  or advance is mandated by law or the order,
judgment or decree of any court of competent  jurisdiction,  in any circumstance
where it appears:

                  (1) That it  would be  inconsistent  with a  provision  of the
Articles of Incorporation,  these bylaws, a resolution of the shareholders or an
agreement  in  effect at the time of the  accrual  of the  alleged  cause of the
action  asserted in the  proceeding in which the expenses were incurred or other
amounts were paid, which prohibits or otherwise limits indemnification; or

                  (2) That it would be inconsistent with any condition expressly
imposed by a court in approving a settlement.


                                   ARTICLE VII

                               RECORDS AND REPORTS

         7.1      MAINTENANCE AND INSPECTION OF SHARE REGISTER

         The corporation shall keep either at its principal  executive office or
at the office of its transfer  agent or registrar (if either be  appointed),  as
determined by resolution of the board of directors, a record of its shareholders
listing the names and addresses of all  shareholders and the number and class of
shares held by each shareholder.

         A shareholder or  shareholders  of the  corporation  who holds at least
five  percent  (5%) in the  aggregate of the  outstanding  voting  shares of the
corporation or who holds at least one percent (1%) of such voting shares and has
filed a Schedule 14B with the Securities and Exchange Commission relating to the
election of  directors,  may (i)  inspect and copy the records of  shareholders'
names,  addresses,  and  shareholdings  during usual  business hours on five (5)
days' prior written demand on the corporation, (ii) obtain from the


                                      -20-




transfer agent of the  corporation,  on written demand and on the tender of such
transfer  agent's usual charges for such list, a list of the names and addresses
of the shareholders who are entitled to vote for the election of directors,  and
their  shareholdings,  as of the most recent record date for which that list has
been  compiled or as of a date  specified by the  shareholder  after the date of
demand.  Such  list  shall  be made  available  to any such  shareholder  by the
transfer  agent on or  before  the later of five (5) days  after  the  demand is
received or five (5) days after the date  specified in the demand as the date as
of which the list is to be compiled.

         The  record of  shareholders  shall also be open to  inspection  on the
written demand of any  shareholder or holder of a voting trust  certificate,  at
any time during usual business hours,  for a purpose  reasonably  related to the
holder's  interests  as a  shareholder  or  as  the  holder  of a  voting  trust
certificate.

         Any inspection and copying under this Section 7.1 may be made in person
or by an agent or  attorney  of the  shareholder  or  holder  of a voting  trust
certificate making the demand.

         7.2      MAINTENANCE AND INSPECTION OF BYLAWS

         The corporation shall keep at its principal executive office or, if its
principal  executive office is not in the State of Cali fornia, at its principal
business  office in California the original or a copy of these bylaws as amended
to date,  which bylaws shall be open to  inspection by the  shareholders  at all
reasonable  times during office hours. If the principal  executive office of the
cor  poration  is outside the State of  California  and the  corporation  has no
principal  business  office in such state,  then the secretary  shall,  upon the
written request of any shareholder,  furnish to that shareholder a copy of these
bylaws as amended to date.

         7.3      MAINTENANCE AND INSPECTION OF OTHER CORPORATE RECORDS

         The accounting books and records and the minutes of proceed ings of the
shareholders,  of the board of directors,  and of any committee or committees of
the board of directors  shall be kept at such place or places as are  designated
by the board of directors or, in absence of such  designation,  at the principal
executive office of the corporation.  The minutes shall be kept in written form,
and the accounting  books and records shall be kept either in written form or in
any other form capable of being converted into written form.

         The  minutes  and  accounting  books  and  records  shall  be  open  to
inspection  upon the  written  demand of any  shareholder  or holder of a voting
trust certificate, at any reasonable time during usual


                                      -21-




business hours, for a purpose  reasonably related to the holder's interests as a
shareholder or as the holder of a voting trust cer tificate.  The inspection may
be made in person or by an agent or attorney and shall include the right to copy
and make extracts. Such rights of inspection shall extend to the records of each
subsidiary corporation of the corporation.

         7.4      INSPECTION BY DIRECTORS

         Every director shall have the absolute right at any reasonable  time to
inspect all books,  records, and documents of every kind as well as the physical
properties of the  corporation  and each of its  subsidiary  corporations.  Such
inspection  by a director may be made in person or by an agent or attorney.  The
right of inspection includes the right to copy and make extracts of documents.

         7.5      ANNUAL REPORT TO SHAREHOLDERS; WAIVER

         The board of directors  shall cause an annual  report to be sent to the
shareholders not later than one hundred twenty (120) days after the close of the
fiscal  year  adopted by the  corporation.  Such  report  shall be sent at least
fifteen  (15) days (or,  if sent by  third-class  mail,  thirty-five  (35) days)
before the annual  meet ing of  shareholders  to be held  during the next fiscal
year and in the  manner  specified  in  Section  2.5 of these  bylaws for giving
notice to shareholders of the corporation.

         The annual  report shall  contain (i) a balance  sheet as of the end of
the fiscal  year,  (ii) an income  statement,  (iii) a  statement  of changes in
financial  position  for the fiscal  year,  and (iv) any  report of  independent
accountants  or, if there is no such report,  the  certificate  of an authorized
officer of the corporation that  the-statements were prepared without audit from
the books and records of the corporation.

         The foregoing  requirement  of an annual report shall be waived so long
as the  shares  of the  corporation  are held by fewer  than one  hundred  (100)
holders of record.

         7.6      FINANCIAL STATEMENTS

         If no annual report for the fiscal year has been sent to  shareholders,
then the corporation  shall,  upon the written  request of any shareholder  made
more than one hundred  twenty  (120) days after the close of such  fiscal  year,
deliver  or mail to the person  making  the  request,  within  thirty  (30) days
thereafter,  a copy of a balance  sheet as of the end of such fiscal year and an
income statement and statement of changes in financial  position for such fiscal
year.


                                      -22-




         If a shareholder or shareholders  holding at least five percent (5%) of
the outstanding shares of any class of stock of the corpo ration makes a written
request to the  corporation  for an income  statement of the corporation for the
three-month,  six-month or  nine-month  period of the then  current  fiscal year
ended  more than  thirty  (30) days  before the date of the  request,  and for a
balance sheet of the  corporation  as of the end of that period,  then the chief
financial  officer  shall cause that  statement to be  prepared,  if not already
prepared,  and shall deliver  personally or mail that statement or statements to
the person  making the request  within thirty (30) days after the receipt of the
request.  If the corpora tion has not sent to the shareholders its annual report
for the last fiscal year, the statements  referred to in the first  paragraph of
this Section 7.6 shall  likewise be delivered  or mailed to the  shareholder  or
shareholders within thirty (30) days after the request.

         The quarterly income  statements and balance sheets referred to in this
section  shall  be  accompanied  by the  report,  if  any,  of  any  independent
accountants  engaged by the  corporation or by the cer tificate of an authorized
officer of the corporation  that the financial  statements were prepared without
audit from the books and records of the corporation.

         7.7      REPRESENTATION OF SHARES OF OTHER CORPORATIONS

         The chairman of the board, the president, any vice president, the chief
financial officer, the secretary or assistant secretary of this corporation,  or
any other person authorized by the board of directors or the president or a vice
president,  is  authorized  to vote,  represent,  and exercise on behalf of this
corporation all rights  incident to any and all shares of any other  corporation
or corporations  standing in the name of this corporation.  The authority herein
granted may be exercised  either by such person  directly or by any other person
authorized  to do so by proxy or power of attorney  duly executed by such person
having the authority.


                                  ARTICLE VIII

                                 GENERAL MATTERS

         8.1      RECORD DATE FOR PURPOSES OTHER THAN NOTICE AND VOTING

         For  purposes  of  determining  the  shareholders  entitled  to receive
payment of any dividend or other  distribution or allotment of any rights or the
shareholders  entitled  to  exercise  any rights in respect of any other  lawful
action  (other  than  action  by share-


                                      -23-




holders by written consent without a meeting),  the board of direc tors may fix,
in advance,  a record date,  which shall not be more than sixty (60) days before
any such  action.  In that  case,  only  shareholders  of record at the close of
business on the date so fixed are entitled to receive the dividend, distribution
or  allot  ment of  rights,  or to  exercise  such  rights,  as the case may be,
notwithstanding any transfer of any shares on the books of the corporation after
the record date so fixed, except as otherwise provided in the Code.

         If the  board of  directors  does not so fix a  record  date,  then the
record date for  determining  shareholders  for any such purpose shall be at the
close of business on the day on which the board adopts the applicable resolution
or the sixtieth (60th) day before the date of that action, whichever is later.

         8.2      CHECKS; DRAFTS; EVIDENCES OF INDEBTEDNESS

         From time to time, the board of directors shall determine by resolution
which person or persons may sign or endorse all checks, drafts, other orders for
payment of money,  notes or other evidences of  indebtedness  that are issued in
the name of or payable to the  corporation,  and only the persons so  authorized
shall sign or endorse those instruments.

         8.3      CORPORATE CONTRACTS AND INSTRUMENTS: HOW EXECUTED

         The board of directors,  except as otherwise  provided in these bylaws,
may  authorize  any officer or officers,  or agent or agents,  to enter into any
contract  or  execute  any  instrument  in the  name  of and  on  behalf  of the
corporation;  such  authority may be general or confined to specific  instances.
Unless so  authorized or ratified by the board of directors or within the agency
power of an  officer,  no  officer,  agent or  employee  shall have any power or
authority to bind the corporation by any contract or engagement or to pledge its
credit or to render it liable for any purpose or for any amount.

         8.4      CERTIFICATES FOR SHARES

         A certificate or certificates  for shares of the  corporation  shall be
issued to each  shareholder when any of such shares are fully paid. The board of
directors  may  authorize  the issuance of  certificates  for shares partly paid
provided  that  these  certifi  cates  shall  state  the  total  amount  of  the
consideration to be paid for them and the amount actually paid. All certificates
shall be signed in the name of the  corporation  by the chairman of the board or
the vice  chairman of the board or the president or a vice presi dent and by the
chief  financial  officer or an  assistant  treasurer  or the  secretary  or, an
assistant secretary, certifying the number


                                      -24-





of shares and the class or series of shares  owned by the share  holder.  Any or
all of the signatures on the certificate may be facsimile.

         In case any  officer,  transfer  agent or  registrar  who has signed or
whose  facsimile  signature  has been placed on a certifi cate ceases to be that
officer,  transfer agent or registrar before that certificate is issued,  it may
be issued by the  corporation  with the same  effect as if that  person  were an
officer, transfer agent or registrar at the date of issue.

         8.5      LOST CERTIFICATES

         Except as provided in this Section 8.5, no new  certificates for shares
shall be issued to replace a previously issued certifi cate unless the latter is
surrendered  to the  corporation  and can celled at the same time.  The board of
directors  may,  in case any  share  certificate  or  certificate  for any other
security is lost,  stolen or destroyed,  authorize  the issuance of  replacement
certifi cates on such terms and  conditions as the board may require;  the board
may  require  indemnification  of the  corporation  secured  by a bond or  other
adequate security  sufficient to protect the corpora tion against any claim that
may be made against it,  including any expense or  liability,  on account of the
alleged loss,  theft or  destruction  of the  certificate or the issuance of the
replacement certificate.

         8.6      CONSTRUCTION; DEFINITIONS

         Unless the context requires otherwise, the general provisions, rules of
construction, and definitions in the Code shall govern the construction of these
bylaws.  Without limiting the generality of this provision,  the singular number
includes  the plural,  the plural  number  includes the  singular,  and the term
"person" includes both a corporation and a natural person.


                                   ARTICLE IX

                                   AMENDMENTS

         9.1      AMENDMENT BY SHAREHOLDERS

         New bylaws may be adopted or these bylaws may be amended or repealed by
the vote or written consent of holders of a majority of the  outstanding  shares
entitled to vote;  provided,  however,  that if the articles of incorporation of
the corporation set forth the number of authorized directors of the corporation,
then the autho-



                                      -25-




rized number of directors may be changed only by an amendment of the articles of
incorporation.

         9.2      AMENDMENT BY DIRECTORS

         Subject to the rights of the shareholders as provided in Section 9.1 of
these bylaws, bylaws, other than a bylaw or an amendment of a bylaw changing the
authorized number of directors (except to fix the authorized number of directors
pursuant  to a bylaw  providing  for a  variable  number of  directors),  may be
adopted, amended or repealed by the board of directors.



                                      -26-





                        CERTIFICATE OF ADOPTION OF BYLAWS

                                       OF

                               JENNER TECHNOLOGIES




                            Adoption by Incorporator

         The undersigned  person  appointed in the Articles of Incorpo ration to
act as the  Incorporator  of Jenner  Technologies  hereby  adopts the  foregoing
bylaws, comprising twenty-five (25) pages, as the Bylaws of the corporation.

         Executed this 10 DAY OF December 1992.



                                                  /s/ LYNN E. SPITLER, M.D.
                                                  -------------------------
                                                  Lynn E. Spitler, M.D.,
                                                  Incorporator



              Certificate by Secretary of Adoption by Incorporator


         The  undersigned   hereby  certifies  that  he  is  the  duly  elected,
qualified,  and acting  Secretary of Jenner  Technologies and that the foregoing
Bylaws,  comprising  twenty-five  (25) pages,  were adopted as the Bylaws of the
corporation  on December  10, 1992,  by the person  appointed in the Articles of
Incorporation to act as the Incorporator of the corporation.

         IN WITNESS  WHEREOF,  the  undersigned  has  hereunto  set his hand and
affixed the corporate seal this 10th day of December, 1992.


                                                      /s/ Mario M. Rosati
                                                      --------------------------
                                                      Mario M. Rosati, Secretary



                                      -27-



                                                                     EXHIBIT 3.4


                           AMENDED AND RESTATED BYLAWS

                                       OF

                            JENNER TECHNOLOGIES, INC.
                            (a Delaware corporation)

















                         AMENDED AND RESTATED BYLAWS OF

                            JENNER TECHNOLOGIES, INC.
                            (a Delaware corporation)



                                TABLE OF CONTENTS
<TABLE>
<CAPTION>

                                                                                 Page

<S>                                                                                <C>
 ARTICLE I - CORPORATE OFFICES......................................................1

          1.1         REGISTERED OFFICE.............................................1
          1.2         OTHER OFFICES.................................................1

 ARTICLE II - MEETINGS OF STOCKHOLDERS..............................................1

          2.1         PLACE OF MEETINGS.............................................1
          2.2         ANNUAL MEETING................................................1
          2.3         SPECIAL MEETING...............................................1
          2.4         NOTICE OF STOCKHOLDERS' MEETINGS..............................2
          2.5         ADVANCE NOTICE OF STOCKHOLDER NOMINEES
                      AND STOCKHOLDER BUSINESS......................................2
          2.6         MANNER OF GIVING NOTICE; AFFIDAVIT OF NOTICE..................3
          2.7         QUORUM........................................................4
          2.8         ADJOURNED MEETING; NOTICE.....................................4
          2.9         VOTING........................................................4
          2.10        STOCKHOLDER ACTION BY WRITTEN CONSENT
                      WITHOUT A MEETING.............................................5
          2.11        RECORD DATE FOR STOCKHOLDER NOTICE; VOTING....................5
          2.12        PROXIES.......................................................5
          2.13        ORGANIZATION..................................................5
          2.14        LIST OF STOCKHOLDERS ENTITLED TO VOTE.........................6
          2.15        WAIVER OF NOTICE..............................................6

 ARTICLE III - DIRECTORS............................................................6

          3.1         POWERS........................................................6
          3.2         NUMBER OF DIRECTORS...........................................6
          3.3         ELECTION AND TERM OF OFFICE OF DIRECTORS......................7
          3.4         RESIGNATION AND VACANCIES.....................................7
          3.5         REMOVAL OF DIRECTORS..........................................8
          3.6         PLACE OF MEETINGS; MEETINGS BY TELEPHONE......................8


                                       -i-







                                TABLE OF CONTENTS

                                   (Continued)

                                                                                 Page

          3.7         FIRST MEETINGS................................................8
          3.8         REGULAR MEETINGS..............................................9
          3.9         SPECIAL MEETINGS; NOTICE......................................9
          3.10        QUORUM........................................................9
          3.11        WAIVER OF NOTICE..............................................9
          3.12        ADJOURNMENT..................................................10
          3.13        NOTICE OF ADJOURNMENT........................................10
          3.14        BOARD ACTION BY WRITTEN CONSENT WITHOUT A MEETING............10
          3.15        FEES AND COMPENSATION OF DIRECTORS...........................10
          3.16        APPROVAL OF LOANS TO OFFICERS................................10

 ARTICLE IV - COMMITTEES...........................................................11

          4.1         COMMITTEES OF DIRECTORS......................................11
          4.2         MEETINGS AND ACTION OF COMMITTEES............................11
          4.3         COMMITTEE MINUTES............................................12

 ARTICLE V - OFFICERS............................................................. 12

          5.1         OFFICERS.....................................................12
          5.2         ELECTION OF OFFICERS.........................................12
          5.3         SUBORDINATE OFFICERS.........................................12
          5.4         REMOVAL AND RESIGNATION OF OFFICERS..........................12
          5.5         VACANCIES IN OFFICES.........................................13
          5.6         CHAIRMAN OF THE BOARD........................................13
          5.7         PRESIDENT....................................................13
          5.8         VICE PRESIDENTS..............................................13
          5.9         SECRETARY....................................................14
          5.10        CHIEF FINANCIAL OFFICER......................................14
          5.11        ASSISTANT SECRETARY..........................................14
          5.12        ADMINISTRATIVE OFFICERS......................................15
          5.13        AUTHORITY AND DUTIES OF OFFICERS.............................15

 ARTICLE VI - INDEMNIFICATION OF DIRECTORS, OFFICERS,
                      EMPLOYEES AND OTHER AGENTS...................................15

          6.1         INDEMNIFICATION OF DIRECTORS AND OFFICERS....................15


                                      -ii-









                                TABLE OF CONTENTS

                                   (Continued)

                                                                                 Page
          6.2         INDEMNIFICATION OF OTHERS....................................16
          6.3         INSURANCE....................................................16

 ARTICLE VII - RECORDS AND REPORTS.................................................17

          7.1         MAINTENANCE AND INSPECTION OF RECORDS........................17
          7.2         INSPECTION BY DIRECTORS......................................17
          7.3         ANNUAL STATEMENT TO STOCKHOLDERS.............................17
          7.4         REPRESENTATION OF SHARES OF OTHER CORPORATIONS...............17
          7.5         CERTIFICATION AND INSPECTION OF BYLAWS.......................18

 ARTICLE VIII - GENERAL MATTERS....................................................18

          8.1         RECORD DATE FOR PURPOSES OTHER THAN
                      NOTICE AND VOTING............................................18
          8.2         CHECKS; DRAFTS; EVIDENCES OF INDEBTEDNESS....................18
          8.3         CORPORATE CONTRACTS AND INSTRUMENTS:  HOW EXECUTED
                       ............................................................18
          8.4         STOCK CERTIFICATES; TRANSFER; PARTLY PAID SHARES.............19
          8.5         SPECIAL DESIGNATION ON CERTIFICATES..........................19
          8.6         LOST CERTIFICATES............................................20
          8.7         TRANSFER AGENTS AND REGISTRARS...............................20
          8.8         CONSTRUCTION; DEFINITIONS....................................20

 ARTICLE IX - AMENDMENTS...........................................................20

</TABLE>





                                     -iii-








                           AMENDED AND RESTATED BYLAWS

                                       OF

                            JENNER TECHNOLOGIES, INC.
                            (a Delaware corporation)




                                    ARTICLE I
                                CORPORATE OFFICES

         1.1      REGISTERED OFFICE

         The  registered  office  of  the  corporation  shall  be  fixed  in the
certificate of incorporation of the corporation.

         1.2      OTHER OFFICES

         The board of directors may at any time establish  branch or subordinate
offices  at any  place or  places  where  the  corporation  is  qualified  to do
business.

                                   ARTICLE II
                            MEETINGS OF STOCKHOLDERS

         2.1      PLACE OF MEETINGS

         Meetings of  stockholders  shall be held at any place within or outside
the State of Delaware  designated by the board of  directors.  In the absence of
any such  designation,  stockholders'  meetings  shall be held at the  principal
executive office of the corporation.

         2.2      ANNUAL MEETING

         The annual  meeting of  stockholders  shall be held each year on a date
and at a time  designated  by the board of  directors.  In the  absence  of such
designation,  the  annual  meeting of  stockholders  shall be held on the second
Wednesday  of June in each year at 10:00  a.m.  However,  if such day falls on a
legal holiday,  then the meeting shall be held at the same time and place on the
next succeeding  full business day. At the meeting,  directors shall be elected,
and any other proper business may be transacted.

         2.3      SPECIAL MEETING

         A special meeting of the  stockholders may be called at any time by the
board of directors,  or by the chairman of the board,  or by the  president.  No
other person or persons are permitted to call a special meeting.



                                       






         If a special  meeting is called by any person or persons other than the
board of directors, then the request shall be in writing, specifying the time of
such meeting and the general  nature of the business  proposed to be transacted,
and shall be delivered  personally or sent by registered  mail or by telegraphic
or other facsimile transmission to the chairman of the board, the president,  or
the secretary of the corporation.  The officer receiving the request shall cause
notice to be promptly given to the stockholders  entitled to vote, in accordance
with the provisions of Sections 2.4 and 2.6 of these bylaws, that a meeting will
be held at the time requested by the person or persons  calling the meeting,  so
long as that time is not less than  thirty-five  (35) nor more than  sixty  (60)
days after the receipt of the request.  If the notice is not given within twenty
(20) days after  receipt of the request,  then the person or persons  requesting
the meeting may give the notice.  Nothing  contained  in this  paragraph of this
Section 2.3 shall be construed as limiting,  fixing or affecting the time when a
meeting of stockholders called by action of the board of directors may be held.

         2.4      NOTICE OF STOCKHOLDERS' MEETINGS

         All  notices of  meetings of  stockholders  shall be sent or  otherwise
given in accordance  with Section 2.6 of these bylaws not less than ten (10) nor
more than  sixty  (60) days  before the date of the  meeting.  The notice  shall
specify the place, date and hour of the meeting and (i) in the case of a special
meeting,  the purpose or purposes  for which the meeting is called (no  business
other than that  specified in the notice may be  transacted) or (ii) in the case
of the annual meeting,  those matters which the board of directors,  at the time
of giving the notice, intends to present for action by the stockholders (but any
proper  matter may be presented at the meeting for such  action).  The notice of
any meeting at which  directors  are to be elected shall include the name of any
nominee or nominees who, at the time of the notice, the board intends to present
for election.

         2.5      ADVANCE NOTICE OF STOCKHOLDER NOMINEES AND STOCKHOLDER
                  BUSINESS

         Subject to the rights of holders of any class or series of stock having
a preference  over the Common Stock as to  dividends  or upon  liquidation,  (a)
nominations  for the  election of  directors,  and (b)  business  proposed to be
brought before any stockholder  meeting may be made by the board of directors or
proxy  committee  appointed  by the  board of  directors  or by any  stockholder
entitled to vote in the election of directors  generally if such  nomination  or
business proposed is otherwise proper business before such meeting. However, any
such stockholder may nominate one or more persons for election as directors at a
meeting or propose  business to be brought  before a meeting,  or both,  only if
such stock holder has given timely notice in proper written form of their intent
to make such  nomination  or  nominations  or to propose  such  business.  To be
timely, such stockholder's notice must be delivered to or mailed and received at
the principal  executive  offices of the  corporation  not less than one hundred
twenty (120) calendar days in advance of the date specified in the corporation's
proxy statement  released to stockholders in connection with the previous year's
annual meeting of  stockholders;  provided,  however,  that in the event that no
annual  meeting was held in the previous year or the date of the annual  meeting
has been changed by more than thirty (30) days from the date contemplated at the
time of the previous  year's proxy  statement,  notice by the  stockholder to be
timely must be so received a reasonable



                                       -2-







time before the  solicitation  is made.  To be in proper form,  a  stockholder's
notice to the secretary shall set forth:

         (i)      the name and  address of the  stockholder  who intends to make
                  the  nominations  or propose the business and, as the case may
                  be,  of  the  person  or  persons  to be  nominated  or of the
                  business to be proposed;

         (ii)     a representation that the stockholder is a holder of record of
                  stock of the corporation entitled to vote at such meeting and,
                  if applicable,  intends to appear in person or by proxy at the
                  meeting to  nominate  the person or persons  specified  in the
                  notice;

         (iii)    if   applicable,   a  description  of  all   arrangements   or
                  understandings  between the  stockholder  and each nominee and
                  any other  person or persons  (naming  such person or persons)
                  pursuant to which the nomination or nominations are to be made
                  by the stockholder;

         (iv)     such other  information  regarding each nominee or each matter
                  of business to be  proposed  by such  stockholder  as would be
                  required to be included in a proxy statement filed pursuant to
                  the proxy rules of the Securities and Exchange  Commission had
                  the nominee been  nominated,  or intended to be nominated,  or
                  the matter  been  proposed,  or intended to be proposed by the
                  board of directors; and

         (v)      if  applicable,  the  consent  of each  nominee  to  serve  as
                  director of the corporation if so elected.

         The chairman of the meeting shall refuse to acknowledge  the nomination
of any person or the proposal of any business  not made in  compliance  with the
foregoing procedure.

         2.6      MANNER OF GIVING NOTICE; AFFIDAVIT OF NOTICE

         Written  notice of any meeting of  stockholders  shall be given  either
personally  or  by   first-class   mail  or  by  telegraphic  or  other  written
communication.  Notices not personally  delivered  shall be sent charges prepaid
and shall be addressed  to the  stockholder  at the address of that  stockholder
appearing on the books of the  corporation  or given by the  stockholder  to the
corporation for the purpose of notice. Notice shall be deemed to have been given
at the  time  when  delivered  personally  or  deposited  in the mail or sent by
telegram or other means of written communication.

         An  affidavit of the mailing or other means of giving any notice of any
stockholders'  meeting,  executed by the secretary,  assistant  secretary or any
transfer  agent of the  corporation  giving  the  notice,  shall be prima  facie
evidence of the giving of such notice.


                                       -3-






         2.7      QUORUM

         The  holders  of a  majority  in voting  power of the stock  issued and
outstanding  and entitled to vote thereat,  present in person or  represented by
proxy,  shall  constitute a quorum at all meetings of the stock  holders for the
transaction  of  business  except as  otherwise  provided  by  statute or by the
certificate  of  incorporation.  If,  however,  such  quorum is not  present  or
represented at any meeting of the stockholders,  then either (i) the chairman of
the meeting or (ii) the stockholders entitled to vote thereat, present in person
or represented  by proxy,  shall have power to adjourn the meeting in accordance
with Section 2.7 of these bylaws.

         When a quorum is present at any  meeting,  the vote of the holders of a
majority of the stock having  voting power present in person or  represented  by
proxy shall decide any question brought before such meeting, unless the question
is one upon which, by express  provision of the laws of the State of Delaware or
of the  certificate  of  incorporation  or these  bylaws,  a  different  vote is
required,  in which case such  express  provision  shall  govern and control the
decision of the question.

         If a quorum be  initially  present,  the  stockholders  may continue to
transact business until  adjournment,  notwithstanding  the withdrawal of enough
stockholders  to leave less than a quorum,  if any action taken is approved by a
majority of the stockholders initially constituting the quorum.

         2.8      ADJOURNED MEETING; NOTICE

         When a meeting is  adjourned  to another  time and place,  unless these
bylaws otherwise  require,  notice need not be given of the adjourned meeting if
the time and place thereof are announced at the meeting at which the adjournment
is taken.  At the adjourned  meeting the  corporation  may transact any business
that might have been transacted at the original  meeting.  If the adjournment is
for more than thirty (30) days, or if after the adjournment a new record date is
fixed for the  adjourned  meeting,  a notice of the  adjourned  meeting shall be
given to each stockholder of record entitled to vote at the meeting.

         2.9      VOTING

         The stockholders  entitled to vote at any meeting of stockholders shall
be determined in accordance with the provisions of Section 2.11 of these bylaws,
subject to the provisions of Sections 217 and 218 of the General Corporation Law
of  Delaware  (relating  to voting  rights of  fiduciaries,  pledgors  and joint
owners, and to voting trusts and other voting agreements).

         Except as may be otherwise provided in the certificate of incorporation
or these bylaws,  each stockholder  shall be entitled to one vote for each share
of capital stock held by such stockholder and stockholders shall not be entitled
to cumulate  their votes in the  election of  directors  or with  respect to any
matter submitted to a vote of the stockholders.


                                       -4-






         2.10     STOCKHOLDER ACTION BY WRITTEN CONSENT WITHOUT A MEETING

         No  action  shall be taken by the  stockholders  except at an annual or
special meeting of the stockholders  called in accordance with these by-laws and
no action shall be taken by the stockholders by written consent.

         2.11     RECORD DATE FOR STOCKHOLDER NOTICE; VOTING

         For purposes of determining the stockholders  entitled to notice of any
meeting or to vote thereat, the board of directors may fix, in advance, a record
date,  which  shall not precede  the date upon which the  resolution  fixing the
record  date is adopted by the board of  directors  and which  shall not be more
than  sixty  (60) days nor less than ten (10) days  before  the date of any such
meeting,  and in such event only stockholders of record on the date so fixed are
entitled to notice and to vote,  notwithstanding  any  transfer of any shares on
the books of the corporation after the record date.

         If the board of  directors  does not so fix a record  date,  the record
date for determining  stockholders entitled to notice of or to vote at a meeting
of  stockholders  shall be at the close of  business  on the  business  day next
preceding  the day on which  notice is given,  or, if notice is  waived,  at the
close of  business  on the  business  day next  preceding  the day on which  the
meeting is held.

         A  determination  of stockholders of record entitled to notice of or to
vote at a meeting of stockholders  shall apply to any adjournment of the meeting
unless the board of directors fixes a new record date for the adjourned meeting,
but the  board of  directors  shall  fix a new  record  date if the  meeting  is
adjourned  for more than  thirty  (30)  days from the date set for the  original
meeting.

         The record date for any other  purpose  shall be as provided in Section
8.1 of these bylaws.

         2.12     PROXIES

         Every person  entitled to vote for  directors,  or on any other matter,
shall  have  the  right  to do so  either  in  person  or by one or more  agents
authorized  by a written proxy signed by the person and filed with the secretary
of the  corporation,  but no such proxy shall be voted or acted upon after three
(3) years from its date,  unless the proxy provides for a longer period. A proxy
shall be deemed signed if the stockholder's name is placed on the proxy (whether
by manual signature,  typewriting,  telegraphic  transmission,  telefacsimile or
otherwise)  by  the  stockholder  or  the  stockholder's  attorney-in-fact.  The
revocability of a proxy that states on its face that it is irrevocable  shall be
governed by the provisions of Section 212(e) of the General  Corporation  Law of
Delaware.

         2.13     ORGANIZATION

         The president, or in the absence of the president,  the chairman of the
board, or, in the absence of the president and the chairman of the board, one of
the corporation's vice presidents, shall call the meeting of the stockholders to
order,  and  shall  act as  chairman  of the  meeting.  In  the  absence  of the
president,  the  chairman  of the  board,  and all of the vice  presidents,  the
stockholders shall appoint a

                                       -5-






chairman for such  meeting.  The chairman of any meeting of  stockholders  shall
determine  the order of business and the  procedures  at the meeting,  including
such  matters  as the  regulation  of the  manner of voting  and the  conduct of
business.  The  secretary  of the  corporation  shall  act as  secretary  of all
meetings of the stockholders, but in the absence of the secretary at any meeting
of the  stockholders,  the chairman of the meeting may appoint any person to act
as secretary of the meeting.

         2.14     LIST OF STOCKHOLDERS ENTITLED TO VOTE

         The officer who has charge of the stock ledger of the corporation shall
prepare and make, at least ten (10) days before every meeting of stockholders, a
complete list of the stockholders  entitled to vote at the meeting,  arranged in
alphabetical  order,  and showing the address of each stockholder and the number
of shares registered in the name of each stockholder. Such list shall be open to
the  examination  of any  stockholder,  for any purpose  germane to the meeting,
during ordinary  business hours, for a period of at least ten (10) days prior to
the meeting,  either at a place within the city where the meeting is to be held,
which  place  shall be  specified  in the notice of the  meeting,  or, if not so
specified,  at the place where the meeting is to be held. The list shall also be
produced  and kept at the time and place of the  meeting  during  the whole time
thereof, and may be inspected by any stockholder who is present.

         2.15     WAIVER OF NOTICE

         Whenever  notice is  required to be given  under any  provision  of the
General  Corporation Law of Delaware or of the certificate of  incorporation  or
these bylaws, a written waiver thereof, signed by the person entitled to notice,
whether before or after the time stated therein,  shall be deemed  equivalent to
notice.  Attendance of a person at a meeting shall constitute a waiver of notice
of such  meeting,  except  when the  person  attends a meeting  for the  express
purpose of objecting, at the beginning of the meeting, to the transaction of any
business  because the meeting is not lawfully  called or  convened.  Neither the
business to be transacted at, nor the purpose of, any regular or special meeting
of the stockholders  need be specified in any written waiver of notice unless so
required by the certificate of incorporation or these bylaws.

                                   ARTICLE III
                                    DIRECTORS

         3.1      POWERS

         Subject to the  provisions of the General  Corporation  Law of Delaware
and to any  limitations  in the  certificate  of  incorporation  or these bylaws
relating  to  action  required  to be  approved  by the  stockholders  or by the
outstanding shares, the business and affairs of the corporation shall be managed
and all  corporate  powers shall be  exercised by or under the  direction of the
board of directors.


                                       -6-






         3.2      NUMBER OF DIRECTORS

                  The number of directors which shall constitute the whole board
shall not be less than one nor more than  nine in  number.  The exact  number of
directors shall be fixed by the board. Directors need not be stockholders.

         No  reduction  of the  authorized  number of  directors  shall have the
effect of removing any director before that director's term of office expires.

         3.3      ELECTION AND TERM OF OFFICE OF DIRECTORS

         Except as provided in Section 3.4 of these bylaws,  directors  shall be
elected at each annual  meeting of  stockholders  to hold office  until the next
annual meeting. Each director, including a director elected or appointed to fill
a vacancy,  shall hold office until the expiration of the term for which elected
and until a successor has been elected and qualified.

         3.4      RESIGNATION AND VACANCIES

         Any  director  may resign  effective  on giving  written  notice to the
chairman of the board,  the president,  the secretary or the board of directors,
unless  the  notice  specifies  a later  time for  that  resignation  to  become
effective.  If the  resignation of a director is effective at a future time, the
board of  directors  may elect a successor  to take office when the  resignation
becomes effective.

         Vacancies in the board of directors  may be filled by a majority of the
remaining  directors,  even  if  less  than a  quorum,  or by a  sole  remaining
director; however, a vacancy created by the removal of a director by the vote of
the stockholders or by court order may be filled only by the affirmative vote of
a majority of the shares  represented and voting at a duly held meeting at which
a quorum is  present  (which  shares  voting  affirmatively  also  constitute  a
majority of the required  quorum).  Each  director so elected  shall hold office
until the next annual meeting of the stockholders and until a successor has been
elected and qualified.

         Unless otherwise  provided in the certificate of incorporation or these
bylaws:

                    (i) Vacancies and newly created directorships resulting from
any  increase  in the  authorized  number  of  directors  elected  by all of the
stockholders  having  the  right to vote as a single  class  may be  filled by a
majority of the directors then in office,  although less than a quorum,  or by a
sole remaining director.

                   (ii) Whenever the holders of any class or classes of stock or
series  thereof are entitled to elect one or more directors by the provisions of
the certificate of incorporation,  vacancies and newly created  directorships of
such class or classes  or series  may be filled by a majority  of the  directors
elected by such class or classes or series thereof then in office,  or by a sole
remaining director so elected.


                                       -7-






         If at any time, by reason of death or resignation  or other cause,  the
corporation  should  have no  directors  in  office,  then  any  officer  or any
stockholder or an executor, administrator, trustee or guardian of a stockholder,
or other fiduciary  entrusted with like  responsibility for the person or estate
of a stockholder,  may call a special meeting of stockholders in accordance with
the provisions of the certificate of incorporation or these bylaws, or may apply
to the Court of Chancery for a decree summarily ordering an election as provided
in Section 211 of the General Corporation Law of Delaware.

         If,  at  the  time  of  filling  any  vacancy  or  any  newly   created
directorship,  the directors then in office  constitute  less than a majority of
the whole board (as constituted  immediately  prior to any such increase),  then
the Court of Chancery may, upon  application of any  stockholder or stockholders
holding at least ten (10)  percent of the total number of the shares at the time
outstanding  having  the right to vote for such  directors,  summarily  order an
election to be held to fill any such  vacancies or newly created  directorships,
or to replace the directors chosen by the directors then in office as aforesaid,
which election shall be governed by the provisions of Section 211 of the General
Corporation Law of Delaware as far as applicable.

         3.5      REMOVAL OF DIRECTORS

         Unless  otherwise   restricted  by  statute,   by  the  certificate  of
incorporation or by these bylaws,  any director or the entire board of directors
may be  removed,  with or without  cause,  by the  holders of a majority  of the
shares then entitled to vote at an election of directors.

         3.6      PLACE OF MEETINGS; MEETINGS BY TELEPHONE

         Regular  meetings  of the board of  directors  may be held at any place
within or outside the State of Delaware  that has been  designated  from time to
time by resolution of the board.  In the absence of such a designation,  regular
meetings  shall be held at the principal  executive  office of the  corporation.
Special  meetings  of the board may be held at any place  within or outside  the
State of Delaware  that has been  designated in the notice of the meeting or, if
not stated in the notice or if there is no notice,  at the  principal  executive
office of the corporation.

         Any meeting of the board, regular or special, may be held by conference
telephone  or  similar  communication   equipment,  so  long  as  all  directors
participating  in the meeting can hear one another;  and all such  participating
directors shall be deemed to be present in person at the meeting.

         3.7      FIRST MEETINGS

         The first  meeting of each newly  elected  board of directors  shall be
held at such time and place as shall be fixed by the vote of the stockholders at
the annual meeting.  In the event of the failure of the  stockholders to fix the
time or place of such first meeting of the newly elected board of directors,  or
in the  event  such  meeting  is not held at the time and  place so fixed by the
stockholders,  the  meeting  may be held at such  time  and  place  as  shall be
specified in a notice given as hereinafter  provided for special meetings of the
board of directors,  or as shall be specified in a written  waiver signed by all
of the directors.

                                       -8-






         3.8      REGULAR MEETINGS

         Regular  meetings of the board of directors may be held without  notice
at such time as shall from time to time be determined by the board of directors.
If any regular meeting day shall fall on a legal holiday, then the meeting shall
be held at the same time and place on the next succeeding full business day.

         3.9      SPECIAL MEETINGS; NOTICE

         Special  meetings of the board of directors for any purpose or purposes
may be called at any time by the chairman of the board, the president,  any vice
president, the secretary or any two directors.

         Notice of the time and place of  special  meetings  shall be  delivered
personally  or by  telephone  to each  director  or sent  by  first-class  mail,
telecopy  or  telegram,  charges  prepaid,  addressed  to each  director at that
director's  address  as it is shown on the  records of the  corporation.  If the
notice is mailed,  it shall be deposited in the United States mail at least four
(4) days  before  the time of the  holding  of the  meeting.  If the  notice  is
delivered  personally  or by  telephone,  telecopy  or  telegram,  it  shall  be
delivered  personally  or by  telephone  or to the  telegraph  company  at least
forty-eight  (48) hours before the time of the holding of the meeting.  Any oral
notice  given  personally  or by  telephone  may be  communicated  either to the
director or to a person at the office of the director who the person  giving the
notice has reason to believe will promptly  communicate it to the director.  The
notice need not specify the purpose or the place of the meeting,  if the meeting
is to be held at the principal executive office of the corporation.

         3.10     QUORUM

         A majority of the  authorized  number of directors  shall  constitute a
quorum for the transaction of business, except to adjourn as provided in Section
3.12 of these  bylaws.  Every act or decision  done or made by a majority of the
directors  present at a duly held meeting at which a quorum is present  shall be
regarded as the act of the board of directors,  subject to the provisions of the
certificate of incorporation and applicable law.

         A meeting  at which a quorum  is  initially  present  may  continue  to
transact  business  notwithstanding  the withdrawal of directors,  if any action
taken is approved by at least a majority of the quorum for that meeting.

         3.11     WAIVER OF NOTICE

         Notice of a meeting  need not be given to any  director (i) who signs a
waiver of notice,  whether before or after the meeting,  or (ii) who attends the
meeting other than for the express purposed of objecting at the beginning of the
meeting to the  transaction of any business  because the meeting is not lawfully
called or convened.  All such waivers shall be filed with the corporate  records
or made part of the minutes of the meeting.  A waiver of notice need not specify
the purpose of any regular or special meeting of the board of directors.


                                       -9-






         3.12     ADJOURNMENT

         A majority of the  directors  present,  whether or not  constituting  a
quorum, may adjourn any meeting of the board to another time and place.

         3.13     NOTICE OF ADJOURNMENT

         Notice of the time and place of  holding  an  adjourned  meeting of the
board  need  not be  given  unless  the  meeting  is  adjourned  for  more  than
twenty-four  (24) hours.  If the meeting is adjourned for more than  twenty-four
(24) hours,  then notice of the time and place of the adjourned meeting shall be
given  before the  adjourned  meeting  takes place,  in the manner  specified in
Section 3.9 of these  bylaws,  to the directors who were not present at the time
of the adjournment.

         3.14     BOARD ACTION BY WRITTEN CONSENT WITHOUT A MEETING

         Any action  required or permitted to be taken by the board of directors
may be  taken  without  a  meeting,  provided  that  all  members  of the  board
individually or collectively  consent in writing to that action.  Such action by
written  consent shall have the same force and effect as a unanimous vote of the
board of directors.  Such written consent and any counterparts  thereof shall be
filed with the minutes of the proceedings of the board of directors.

         3.15     FEES AND COMPENSATION OF DIRECTORS

         Directors and members of committees may receive such  compensation,  if
any, for their  services and such  reimbursement  of expenses as may be fixed or
determined by resolution of the board of directors.  This Section 3.15 shall not
be construed to preclude any director from serving the  corporation in any other
capacity as an officer,  agent, employee or otherwise and receiving compensation
for those services.

         3.16     APPROVAL OF LOANS TO OFFICERS

         The  corporation  may lend money to, or guarantee any obligation of, or
otherwise  assist any officer or other employee of the corporation or any of its
subsidiaries,  including  any  officer  or  employee  who is a  director  of the
corporation  or any of  its  subsidiaries,  whenever,  in  the  judgment  of the
directors,  such loan,  guaranty or  assistance  may  reasonably  be expected to
benefit the corporation.  The loan,  guaranty or other assistance may be with or
without interest and may be unsecured, or secured in such manner as the board of
directors shall approve,  including,  without limitation,  a pledge of shares of
stock of the corporation.  Nothing  contained in this section shall be deemed to
deny, limit or restrict the powers of guaranty or warranty of the corporation at
common law or under any statute.


                                      -10-






                                   ARTICLE IV
                                   COMMITTEES

         4.1      COMMITTEES OF DIRECTORS

         The board of directors may, by resolution  adopted by a majority of the
authorized  number of  directors,  designate  one (1) or more  committees,  each
consisting of two or more directors,  to serve at the pleasure of the board. The
board may  designate  one (1) or more  directors  as  alternate  members  of any
committee,  who may replace any absent or disqualified  member at any meeting of
the committee.  The  appointment of members or alternate  members of a committee
requires  the vote of a majority  of the  authorized  number of  directors.  Any
committee, to the extent provided in the resolution of the board, shall have and
may exercise all the powers and  authority of the board,  but no such  committee
shall have the power or authority to (i) amend the certificate of  incorporation
(except that a committee  may, to the extent  authorized  in the  resolution  or
resolutions  providing  for the issuance of shares of stock adopted by the board
of directors  as provided in Section  151(a) of the General  Corporation  Law of
Delaware,  fix the  designations  and any of the  preferences  or rights of such
shares  relating to dividends,  redemption,  dissolution,  any  distribution  of
assets of the corporation or the conversion into, or the exchange of such shares
for, shares of any other class or classes or any other series of the same or any
other class or classes of stock of the corporation),  (ii) adopt an agreement of
merger or consolidation under Sections 251 or 252 of the General Corporation Law
of Delaware,  (iii) recommend to the stockholders the sale, lease or exchange of
all  or  substantially  all of  the  corporation's  property  and  assets,  (iv)
recommend to the  stockholders a dissolution of the  corporation or a revocation
of a dissolution  or (v) amend the bylaws of the  corporation;  and,  unless the
board resolution  establishing  the committee,  the bylaws or the certificate of
incorporation  expressly so provide,  no such committee  shall have the power or
authority to declare a dividend, to authorize the issuance of stock, or to adopt
a  certificate  of ownership  and merger  pursuant to Section 253 of the General
Corporation Law of Delaware.

         4.2      MEETINGS AND ACTION OF COMMITTEES

         Meetings and actions of  committees  shall be governed by, and held and
taken in  accordance  with,  the  following  provisions  of Article III of these
bylaws:  Section 3.6 (place of meetings;  meetings by tele  phone),  Section 3.8
(regular  meetings),  Section  3.9  (special  meetings;  notice),  Section  3.10
(quorum),  Section 3.11 (waiver of notice), Section 3.12 (adjournment),  Section
3.13 (notice of  adjournment)  and Section 3.14 (board action by written consent
without  meeting),  with such  changes  in the  context  of those  bylaws as are
necessary to substitute the committee and its members for the board of directors
and its  members;  provided,  however,  that the  time of  regular  meetings  of
committees  may be determined  either by resolution of the board of directors or
by resolution of the committee,  that special meetings of committees may also be
called by  resolution  of the board of  directors,  and that  notice of  special
meetings of committees shall also be given to all alternate  members,  who shall
have the right to attend all meetings of the  committee.  The board of directors
may adopt rules for the  government of any committee not  inconsistent  with the
provisions of these bylaws.


                                      -11-






         4.3      COMMITTEE MINUTES

         Each  committee  shall keep regular  minutes of its meetings and report
the same to the board of directors when required.

                                    ARTICLE V
                                    OFFICERS

         5.1      OFFICERS

         The  Corporate  Officers of the  corporation  shall be a  president,  a
secretary and a chief financial  officer.  The corporation may also have, at the
discretion of the board of directors,  a chairman of the board, one or more vice
presidents (however denominated), one or more assistant secretaries, a treasurer
and  one or  more  assistant  treasurers,  and  such  other  officers  as may be
appointed in accordance with the provisions of Section 5.3 of these bylaws.  Any
number of offices may be held by the same person.

         In addition to the Corporate  Officers of the Company  described above,
there may also be such  Administrative  Officers  of the  corporation  as may be
designated and appointed  from time to time by the president of the  corporation
in accordance with the provisions of Section 5.12 of these bylaws.

         5.2      ELECTION OF OFFICERS

         The Corporate Officers of the corporation,  except such officers as may
be appointed in accordance  with the provisions of Section 5.3 or Section 5.5 of
these bylaws, shall be chosen by the board of directors,  subject to the rights,
if any, of an officer  under any  contract of  employment,  and shall hold their
respective  offices  for such terms as the board of  directors  may from time to
time determine.

         5.3      SUBORDINATE OFFICERS

         The board of  directors  may appoint,  or may empower the  president to
appoint,  such other  Corporate  Officers as the business of the corporation may
require,  each of whom shall hold  office for such  period,  have such power and
authority,  and perform  such duties as are  provided in these  bylaws or as the
board of directors may from time to time determine.

         The   president   may  from  time  to  time   designate   and   appoint
Administrative  Officers of the corporation in accordance with the provisions of
Section 5.12 of these bylaws.

         5.4      REMOVAL AND RESIGNATION OF OFFICERS

         Subject  to the  rights,  if any,  of a  Corporate  Officer  under  any
contract of  employment,  any Corporate  Officer may be removed,  either with or
without  cause,  by the board of directors at any regular or special  meeting of
the  board  or,  except in case of a  Corporate  Officer  chosen by the board of
directors,  by any  Corporate  Officer  upon whom such power of  removal  may be
conferred by the board of directors.


                                      -12-






         Any Corporate  Officer may resign at any time by giving  written notice
to the corporation. Any resignation shall take effect at the date of the receipt
of that  notice or at any later  time  specified  in that  notice;  and,  unless
otherwise  specified in that notice, the acceptance of the resignation shall not
be necessary to make it effective.  Any resignation is without  prejudice to the
rights,  if any, of the  corporation  under any contract to which the  Corporate
Officer is a party.

         Any  Administrative  Officer  designated and appointed by the president
may be removed, either with or without cause, at any time by the president.  Any
Administrative  Officer may resign at any time by giving  written  notice to the
president or to the secretary of the corporation.

         5.5      VACANCIES IN OFFICES

         A  vacancy  in any  office  because  of  death,  resignation,  removal,
disqualification  or any other cause shall be filled in the manner prescribed in
these bylaws for regular appointments to that office.

         5.6      CHAIRMAN OF THE BOARD

         The  chairman of the board,  if such an officer be elected,  shall,  if
present,  preside at meetings of the board of directors  and exercise such other
powers and perform such other duties as may from time to time be assigned to him
by the board of directors or as may be prescribed  by these bylaws.  If there is
no president,  then the chairman of the board shall also be the chief  executive
officer of the  corporation  and shall have the powers and duties  prescribed in
Section 5.7 of these bylaws.

         5.7      PRESIDENT

         Subject  to such  supervisory  powers,  if any,  as may be given by the
board of directors  to the  chairman of the board,  if there be such an officer,
the president shall be the chief executive officer of the corporation and shall,
subject to the  control of the board of  directors,  have  general  supervision,
direction and control of the business and the officers of the corporation. He or
she shall  preside at all  meetings of the  stockholders  and, in the absence or
nonexistence  of a  chairman  of the  board,  at all  meetings  of the  board of
directors.  He or she shall have the  general  powers  and duties of  management
usually vested in the office of president of a corporation,  and shall have such
other powers and perform such other duties as may be  prescribed by the board of
directors or these bylaws.

         5.8      VICE PRESIDENTS

         In the  absence  or  disability  of the  president,  and if there is no
chairman of the board,  the vice  presidents,  if any, in order of their rank as
fixed by the board of directors or, if not ranked,  a vice president  designated
by the board of  directors,  shall  perform all the duties of the  president and
when so  acting  shall  have  all  the  powers  of,  and be  subject  to all the
restrictions  upon, the  president.  The vice  presidents  shall have such other
powers and perform such other duties as from time to time may be prescribed  for
them respectively by the board of directors,  these bylaws, the president or the
chairman of the board.


                                      -13-







         5.9      SECRETARY

         The  secretary  shall  keep  or  cause  to be  kept,  at the  principal
executive  office  of the  corporation  or such  other  place  as the  board  of
directors may direct, a book of minutes of all meetings and actions of the board
of directors,  committees of directors and stockholders.  The minutes shall show
the time and place of each meeting, whether regular or special (and, if special,
how authorized  and the notice given),  the names of those present at directors'
meetings or committee  meetings,  the number of shares present or represented at
stockholders' meetings and the proceedings thereof.

         The  secretary  shall  keep,  or  cause to be  kept,  at the  principal
executive  office  of the  corporation  or at the  office  of the  corporation's
transfer  agent or  registrar,  as  determined  by  resolution  of the  board of
directors, a share register or a duplicate share register,  showing the names of
all stockholders  and their addresses,  the number and classes of shares held by
each, the number and date of certificates  evidencing such shares and the number
and date of cancellation of every certificate surrendered for cancellation.

         The secretary shall give, or cause to be given,  notice of all meetings
of the stockholders and of the board of directors required to be given by law or
by these  bylaws.  He or she shall keep the seal of the  corporation,  if one be
adopted, in safe custody and shall have such other powers and perform such other
duties as may be prescribed by the board of directors or by these bylaws.

         5.10     CHIEF FINANCIAL OFFICER

         The chief  financial  officer shall keep and  maintain,  or cause to be
kept and  maintained,  adequate and correct books and records of accounts of the
properties and business  transactions of the corporation,  including accounts of
its  assets,  liabilities,  receipts,  disbursements,  gains,  losses,  capital,
retained earnings and shares. The books of account shall at all reasonable times
be open to  inspection by any director for a purpose  reasonably  related to his
position as a director.

         The chief financial officer shall deposit all money and other valuables
in the name and to the credit of the corporation  with such  depositaries as may
be designated by the board of directors.  He or she shall  disburse the funds of
the corporation as may be ordered by the board of directors, shall render to the
president and  directors,  whenever they request it, an account of all of his or
her  transactions as chief financial  officer and of the financial  condition of
the corporation,  and shall have such other powers and perform such other duties
as may be prescribed by the board of directors or these bylaws.

         5.11     ASSISTANT SECRETARY

         The  assistant  secretary,  if any,  or, if there is more than one, the
assistant  secretaries in the order  determined by the board of directors (or if
there be no such  determination,  then in the order of their election) shall, in
the absence of the  secretary or in the event of his or her inability or refusal
to act,  perform the duties and exercise the powers of the  secretary  and shall
perform  such other  duties and have such other powers as the board of directors
may from time to time prescribe.


                                      -14-






         5.12     ADMINISTRATIVE OFFICERS

         In addition to the Corporate Officers of the corporation as provided in
Section 5.1 of these bylaws and such  subordinate  Corporate  Officers as may be
appointed in accordance with Section 5.3 of these bylaws, there may also be such
Administrative  Officers of the  corporation  as may be designated and appointed
from time to time by the president of the corporation.  Administrative  Officers
shall  perform  such  duties  and have  such  powers as from time to time may be
determined  by the  president  or the board of  directors in order to assist the
Corporate  Officers in the  furtherance of their duties.  In the  performance of
such  duties and the  exercise  of such  powers,  however,  such  Administrative
Officers shall have limited authority to act on behalf of the corporation as the
board of directors shall establish,  including but not limited to limitations on
the dollar amount and on the scope of agreements or commitments that may be made
by such Administrative Officers on behalf of the corporation,  which limitations
may not be  exceeded by such  individuals  or altered by the  president  without
further approval by the board of directors.

         5.13     AUTHORITY AND DUTIES OF OFFICERS

         In addition to the foregoing powers, authority and duties, all officers
of the corporation shall respectively have such authority and powers and perform
such  duties in the  management  of the  business of the  corporation  as may be
designated from time to time by the board of directors.

                                   ARTICLE VI
                INDEMNIFICATION OF DIRECTORS, OFFICERS, EMPLOYEES
                                AND OTHER AGENTS

         6.1      INDEMNIFICATION OF DIRECTORS AND OFFICERS

         The  corporation  shall,  to the  maximum  extent  and  in  the  manner
permitted by the General  Corporation  Law of Delaware as the same now exists or
may  hereafter be amended,  indemnify  any person  against  expenses  (including
attorneys' fees), judgments,  fines, and amounts paid in settlement actually and
reasonably  incurred in  connection  with any  threatened,  pending or completed
action,  suit,  or  proceeding  in  which  such  person  was or is a party or is
threatened to be made a party by reason of the fact that such person is or was a
director or officer of the  corporation.  For  purposes of this  Section  6.1, a
"director" or "officer" of the  corporation  shall mean any person (i) who is or
was a director or officer of the corporation,  (ii) who is or was serving at the
request  of the  corporation  as a director  or officer of another  corporation,
partnership,  joint  venture,  trust or  other  enterprise,  or (iii)  who was a
director or officer of a corporation which was a predecessor  corporation of the
corporation  or of  another  enterprise  at  the  request  of  such  predecessor
corporation.

         The corporation shall be required to indemnify a director or officer in
connection  with an action,  suit, or proceeding (or part thereof)  initiated by
such  director  or officer  only if the  initiation  of such  action,  suit,  or
proceeding  (or part  thereof) by the director or officer was  authorized by the
Board of Directors of the corporation.


                                      -15-






         The  corporation  shall pay the expenses  (including  attorney's  fees)
incurred by a director or officer of the corporation entitled to indemnification
hereunder  in  defending  any  action,  suit or  proceeding  referred to in this
Section 6.1 in advance of its final disposition; provided, however, that payment
of expenses  incurred by a director or officer of the  corporation in advance of
the final disposition of such action, suit or proceeding shall be made only upon
receipt of an  undertaking  by the  director  or  officer  to repay all  amounts
advanced if it should  ultimately be determined  that the director of officer is
not entitled to be indemnified under this Section 6.1 or otherwise.

         The  rights  conferred  on any  person  by this  Article  shall  not be
exclusive of any other  rights  which such person may have or hereafter  acquire
under any statute,  provision of the corporation's Certificate of Incorporation,
these bylaws,  agreement, vote of the stockholders or disinterested directors or
otherwise.

         Any repeal or modification of the foregoing  provisions of this Article
shall not adversely  affect any right or  protection  hereunder of any person in
respect of any act or  omission  occurring  prior to the time of such  repeal or
modification.

         6.2      INDEMNIFICATION OF OTHERS

         The corporation  shall have the power, to the maximum extent and in the
manner  permitted  by the  General  Corporation  Law of Delaware as the same now
exists or may  hereafter  be  amended,  to  indemnify  any  person  (other  than
directors and officers) against expenses (including attorneys' fees), judgments,
fines,  and amounts  paid in  settlement  actually  and  reasonably  incurred in
connection  with  any  threatened,   pending  or  completed  action,   suit,  or
proceeding, in which such person was or is a party or is threatened to be made a
party by reason of the fact that such  person is or was an  employee or agent of
the  corporation.  For purposes of this Section 6.2, an "employee" or "agent" of
the corporation (other than a director or officer) shall mean any person (i) who
is or was an employee or agent of the corporation, (ii) who is or was serving at
the request of the  corporation as an employee or agent of another  corporation,
partnership,  joint  venture,  trust or other  enterprise,  or (iii)  who was an
employee or agent of a corporation  which was a predecessor  corporation  of the
corporation  or of  another  enterprise  at  the  request  of  such  predecessor
corporation.

         6.3      INSURANCE

         The  corporation  may purchase and maintain  insurance on behalf of any
person who is or was a director,  officer, employee or agent of the corporation,
or is or was serving at the request of the  corporation as a director,  officer,
employee or agent of another corporation,  partnership,  joint venture, trust or
other enterprise  against any liability asserted against him or her and incurred
by him or her in any such capacity, or arising out of his or her status as such,
whether  or not the  corporation  would have the power to  indemnify  him or her
against such liability  under the provisions of the General  Corporation  Law of
Delaware.


                                      -16-






                                   ARTICLE VII
                               RECORDS AND REPORTS

         7.1      MAINTENANCE AND INSPECTION OF RECORDS

         The corporation shall,  either at its principal  executive office or at
such place or places as designated  by the board of directors,  keep a record of
its  stockholders  listing their names and addresses and the number and class of
shares  held by each  stockholder,  a copy of these  bylaws as  amended to date,
accounting books and other records of its business and properties.

         Any  stockholder  of record,  in person or by attorney or other  agent,
shall,  upon written  demand under oath  stating the purpose  thereof,  have the
right during the usual hours for business to inspect for any proper  purpose the
corporation's stock ledger, a list of its stockholders,  and its other books and
records and to make copies or extracts therefrom.  A proper purpose shall mean a
purpose reasonably related to such person's interest as a stockholder.  In every
instance  where an  attorney or other agent is the person who seeks the right to
inspection, the demand under oath shall be accompanied by a power of attorney or
such other  writing  that  authorizes  the  attorney or other agent to so act on
behalf of the  stockholder.  The  demand  under oath  shall be  directed  to the
corporation  at its registered  office in Delaware or at its principal  place of
business.

         7.2      INSPECTION BY DIRECTORS

         Any  director  shall have the right to examine  (and to make copies of)
the  corporation's  stock ledger, a list of its stockholders and its other books
and  records  for a  purpose  reasonably  related  to his or her  position  as a
director.

         7.3      ANNUAL STATEMENT TO STOCKHOLDERS

         The board of directors shall present at each annual meeting, and at any
special meeting of the stockholders when called for by vote of the stockholders,
a full and clear statement of the business and condition of the corporation.

         7.4      REPRESENTATION OF SHARES OF OTHER CORPORATIONS

         The chairman of the board,  if any, the president,  any vice president,
the chief financial  officer,  the secretary or any assistant  secretary of this
corporation,  or any other  person  authorized  by the board of directors or the
president or a vice president,  is authorized to vote, represent and exercise on
behalf of this  corporation  all  rights  incident  to any and all shares of the
stock of any other  corporation  or  corporations  standing  in the name of this
corporation. The authority herein granted may be exercised either by such person
directly  or by any  other  person  authorized  to do so by  proxy  or  power of
attorney duly executed by such person having the authority.


                                      -17-






         7.5      CERTIFICATION AND INSPECTION OF BYLAWS

         The original or a copy of these bylaws, as amended or otherwise altered
to  date,  certified  by the  secretary,  shall  be  kept  at the  corporation's
principal  executive  office and shall be open to inspection by the stockholders
of the corporation, at all reasonable times during office hours.

                                  ARTICLE VIII
                                 GENERAL MATTERS

         8.1      RECORD DATE FOR PURPOSES OTHER THAN NOTICE AND VOTING

         For  purposes  of  determining  the  stockholders  entitled  to receive
payment of any dividend or other  distribution or allotment of any rights or the
stockholders  entitled  to  exercise  any  rights  in  respect  of  any  change,
conversion or exchange of stock,  or for the purpose of any other lawful action,
the board of  directors  may fix, in  advance,  a record  date,  which shall not
precede the date upon which the resolution fixing the record date is adopted and
which  shall not be more than sixty (60) days  before any such  action.  In that
case, only  stockholders of record at the close of business on the date so fixed
are entitled to receive the dividend, distribution or allotment of rights, or to
exercise such rights,  as the case may be,  notwithstanding  any transfer of any
shares on the books of the corporation after the record date so fixed, except as
otherwise provided by law.

         If the  board of  directors  does not so fix a  record  date,  then the
record date for  determining  stockholders  for any such purpose shall be at the
close  of  business  on the day on  which  the  board of  directors  adopts  the
applicable resolution.

         8.2      CHECKS; DRAFTS; EVIDENCES OF INDEBTEDNESS

         From time to time, the board of directors shall determine by resolution
which person or persons may sign or endorse all checks, drafts, other orders for
payment of money,  notes or other evidences of  indebtedness  that are issued in
the name of or payable to the  corporation,  and only the persons so  authorized
shall sign or endorse those instruments.

         8.3      CORPORATE CONTRACTS AND INSTRUMENTS:  HOW EXECUTED

         The board of directors,  except as otherwise  provided in these bylaws,
may authorize and empower any officer or officers,  or agent or agents, to enter
into any contract or execute any  instrument in the name of and on behalf of the
corporation;  such power and  authority  may be general or  confined to specific
instances.  Unless so authorized or ratified by the board of directors or within
the agency  power of an officer,  no officer,  agent or employee  shall have any
power or authority to bind the  corporation  by any contract or engagement or to
pledge its credit or to render it liable for any purpose or for any amount.


                                      -18-






         8.4      STOCK CERTIFICATES; TRANSFER; PARTLY PAID SHARES

         The shares of the  corporation  shall be represented  by  certificates,
provided  that  the  board  of  directors  of the  corporation  may  provide  by
resolution  or  resolutions  that some or all of any or all classes or series of
its stock shall be uncertificated shares. Any such resolution shall not apply to
shares represented by a certificate until such certificate is surrendered to the
corporation.  Notwithstanding  the adoption of such a resolution by the board of
directors,  every holder of stock represented by certificates and, upon request,
every holder of uncertificated  shares,  shall be entitled to have a certificate
signed by, or in the name of the corporation  by, the chairman or  vice-chairman
of the  board of  directors,  or the  president  or  vice-president,  and by the
treasurer or an assistant treasurer,  or the secretary or an assistant secretary
of such corporation  representing the number of shares registered in certificate
form. Any or all of the  signatures on the  certificate  may be a facsimile.  In
case any officer,  transfer agent or registrar who has signed or whose facsimile
signature  has been placed  upon a  certificate  has ceased to be such  officer,
transfer agent or registrar before such certificate is issued,  it may be issued
by the  corporation  with the same  effect  as if he or she were  such  officer,
transfer agent or registrar at the date of issue.

         Certificates  for shares  shall be of such form and device as the board
of directors  may designate and shall state the name of the record holder of the
shares represented thereby;  its number; date of issuance;  the number of shares
for  which it is  issued;  a  summary  statement  or  reference  to the  powers,
designations,  preferences  or  other  special  rights  of  such  stock  and the
qualifications,  limitations or restrictions of such preferences  and/or rights,
if any;  a  statement  or  summary of liens,  if any;  a  conspicuous  notice of
restrictions  upon transfer or registration of transfer,  if any; a statement as
to any applicable  voting trust agreement;  if the shares be assessable,  or, if
assessments are collectible by personal action, a plain statement of such facts.

         Upon surrender to the secretary or transfer agent of the corporation of
a certificate  for shares duly  endorsed or  accompanied  by proper  evidence of
succession,  assignment  or authority  to transfer,  it shall be the duty of the
corporation to issue a new  certificate to the person entitled  thereto,  cancel
the old certificate and record the transaction upon its books.

         The corporation may issue the whole or any part of its shares as partly
paid and  subject  to call for the  remainder  of the  consideration  to be paid
therefor.  Upon the face or back of each stock  certificate  issued to represent
any such partly paid shares, or upon the books and records of the corporation in
the  case  of  uncertificated  partly  paid  shares,  the  total  amount  of the
consideration  to be paid  therefor and the amount paid thereon shall be stated.
Upon the declaration of any dividend on fully paid shares, the corporation shall
declare a dividend upon partly paid shares of the same class,  but only upon the
basis of the percentage of the consideration actually paid thereon.

         8.5      SPECIAL DESIGNATION ON CERTIFICATES

         If the  corporation is authorized to issue more than one class of stock
or more than one series of any class,  then the powers,  the  designations,  the
preferences and the relative, participating, optional or other special rights of
each class of stock or series  thereof and the  qualifications,  limitations  or
restrictions  of such  preferences  and/or  rights shall be set forth in full or
summarized on the face or back of the

                                      -19-






certificate  that the corporation  shall issue to represent such class or series
of stock;  provided,  however, that, except as otherwise provided in Section 202
of  the  General  Corporation  Law  of  Delaware,   in  lieu  of  the  foregoing
requirements  there may be set forth on the face or back of the certificate that
the  corporation  shall  issue to  represent  such  class or  series  of stock a
statement that the corporation  will furnish without charge to each  stockholder
who so requests the powers, the designations,  the preferences and the relative,
participating, optional or other special rights of each class of stock or series
thereof and the qualifications,  limitations or restrictions of such preferences
and/or rights.

         8.6      LOST CERTIFICATES

         Except as provided in this Section 8.6, no new  certificates for shares
shall be issued to replace a previously issued  certificate unless the latter is
surrendered  to the  corporation  and  cancelled at the same time.  The board of
directors  may,  in case any  share  certificate  or  certificate  for any other
security is lost,  stolen or destroyed,  authorize  the issuance of  replacement
certificates  on such terms and  conditions as the board may require;  the board
may  require  indemnification  of the  corporation  secured  by a bond or  other
adequate security  sufficient to protect the corporation  against any claim that
may be made against it,  including any expense or  liability,  on account of the
alleged loss,  theft or  destruction  of the  certificate or the issuance of the
replacement certificate.

         8.7      TRANSFER AGENTS AND REGISTRARS

         The board of  directors  may  appoint  one or more  transfer  agents or
transfer  clerks,  and  one or  more  registrars,  each  of  which  shall  be an
incorporated  bank or trust company -- either domestic or foreign,  who shall be
appointed at such times and places as the  requirements  of the  corporation may
necessitate and the board of directors may designate.

         8.8      CONSTRUCTION; DEFINITIONS

         Unless the context requires otherwise, the general provisions, rules of
construction  and  definitions in the General  Corporation Law of Delaware shall
govern the construction of these bylaws. Without limiting the generality of this
provision, as used in these bylaws, the singular number includes the plural, the
plural  number  includes the singular,  and the term  "person"  includes both an
entity and a natural person.

                                   ARTICLE IX
                                   AMENDMENTS

         The original or other bylaws of the corporation may be adopted, amended
or repealed by the stockholders entitled to vote or by the board of directors of
the  corporation.  The fact  that  such  power  has been so  conferred  upon the
directors shall not divest the  stockholders of the power, nor limit their power
to adopt, amend or repeal bylaws.


                                      -20-






         Whenever an  amendment  or new bylaw is adopted,  it shall be copied in
the book of bylaws with the original  bylaws,  in the appropriate  place. If any
bylaw is repealed,  the fact of repeal with the date of the meeting at which the
repeal was enacted or the filing of the operative  written  consent(s)  shall be
stated in said book.


                                      -21-








                                                                    EXHIBIT 10.1

                            JENNER TECHNOLOGIES, INC.

                            INDEMNIFICATION AGREEMENT


         This  Indemnification   Agreement  ("Agreement")  is  effective  as  of
_____________,   1997  by  and  between  Jenner  Technologies,   Inc.,  Delaware
corporation (the "Company"), and ________________, ("Indemnitee").

         WHEREAS,  the  Company  desires to attract  and retain the  services of
highly qualified individuals,  such as Indemnitee,  to serve the Company and its
related entities;

         WHEREAS,  in order to induce Indemnitee to continue to provide services
to the Company,  the Company wishes to provide for the  indemnification  of, and
the  advancement of expenses to,  Indemnitee to the maximum extent  permitted by
law;

         WHEREAS,  the Company and Indemnitee recognize the continued difficulty
in  obtaining  liability  insurance  for  the  Company's  directors,   officers,
employees, agents and fiduciaries, the significant increases in the cost of such
insurance and the general reductions in the coverage of such insurance;

         WHEREAS,  the Company and Indemnitee  further recognize the substantial
increase in corporate  litigation in general,  subjecting  directors,  officers,
employees, agents and fiduciaries to expensive litigation risks at the same time
as the  availability  and  coverage of  liability  insurance  has been  severely
limited; and

         WHEREAS,  in view of the  considerations  set forth above,  the Company
desires  that  Indemnitee  shall be  indemnified  and  advanced  expenses by the
Company as set forth herein;

         NOW,  THEREFORE,  the Company and Indemnitee  hereby agree as set forth
below.

         1.       Certain Definitions.

                  (a)  "Change in Control"  shall  mean,  and shall be deemed to
have occurred if, on or after the date of this  Agreement,  (i) any "person" (as
such term is used in Sections 13(d) and 14(d) of the Securities  Exchange Act of
1934,  as  amended) or group  acting in  concert,  other than a trustee or other
fiduciary  holding  securities  under an  employee  benefit  plan of the Company
acting in such  capacity or a  corporation  owned  directly or indirectly by the
stockholders  of the  Company in  substantially  the same  proportions  as their
ownership of stock of the Company, becomes the "beneficial owner" (as defined in
Rule 13d-3 under said Act), directly or indirectly, of securities of the Company
representing  more  than  50% of  the  total  voting  power  represented  by the
Company's then outstanding Voting Securities (as defined below), (ii) during any
period of two consecutive years, individuals who at the beginning of such period
constitute  the Board of  Directors  of the Company and any new  director  whose
election by the Board of Directors or  nomination  for election by the Company's
stockholders  was  approved  by a vote  of at  least  two  thirds  (2/3)  of the
directors then still in office who either were directors at the beginning of the
period or whose  election or nomination for election was previously so approved,
cease for any reason to constitute a majority thereof, (iii) the stockholders of
the Company approve a merger or consolidation


                                       -1-






of the Company with any other  corporation  other than a merger or consolidation
which  would  result  in  the  Voting  Securities  of  the  Company  outstanding
immediately   prior  thereto   continuing  to  represent  (either  by  remaining
outstanding  or by being  converted  into  Voting  Securities  of the  surviving
entity)  at least  80% of the  total  voting  power  represented  by the  Voting
Securities of the Company or such surviving entity outstanding immediately after
such merger or consolidation,  or (iv) the stockholders of the Company approve a
plan of  complete  liquidation  of the Company or an  agreement  for the sale or
disposition  by the  Company  of (in one  transaction  or a  series  of  related
transactions) all or substantially all of the Company's assets.

                  (b)  "Claim"  shall mean with  respect to a Covered  Event (as
defined below): any threatened, pending or completed action, suit, proceeding or
alternative   dispute  resolution   mechanism,   or  any  hearing,   inquiry  or
investigation  that  Indemnitee  in  good  faith  believes  might  lead  to  the
institution  of  any  such  action,  suit,  proceeding  or  alternative  dispute
resolution mechanism, whether civil, criminal, administrative,  investigative or
other.

                  (c) References to the "Company" shall include,  in addition to
Jenner   Technologies,   Inc.,  any  constituent   corporation   (including  any
constituent of a  constituent)  absorbed in a  consolidation  or merger to which
Jenner  Technologies,  Inc. (or any of its wholly owned subsidiaries) is a party
which,  if its  separate  existence  had  continued,  would  have had  power and
authority  to  indemnify  its   directors,   officers,   employees,   agents  or
fiduciaries,  so that if  Indemnitee  is or was a director,  officer,  employee,
agent or fiduciary of such constituent corporation,  or is or was serving at the
request of such constituent corporation as a director,  officer, employee, agent
or  fiduciary  of another  corporation,  partnership,  joint  venture,  employee
benefit  plan,  trust or other  enterprise,  Indemnitee  shall stand in the same
position under the provisions of this Agreement with respect to the resulting or
surviving  corporation as Indemnitee would have with respect to such constituent
corporation if its separate existence had continued.

                  (d) "Covered Event" shall mean any event or occurrence related
to the fact that Indemnitee is or was a director,  officer,  employee,  agent or
fiduciary of the Company, or any subsidiary of the Company, or is or was serving
at the  request  of the  Company  as a  director,  officer,  employee,  agent or
fiduciary of another  corporation,  partnership,  joint venture,  trust or other
enterprise,  or by reason of any action or  inaction  on the part of  Indemnitee
while serving in such capacity.

                  (e)  "Expenses"  shall  mean any and all  expenses  (including
attorneys'  fees and all other  costs,  expenses  and  obligations  incurred  in
connection with investigating, defending, being a witness in or participating in
(including  on  appeal),  or  preparing  to  defend,  to be a  witness  in or to
participate in, any action,  suit,  proceeding,  alternative  dispute resolution
mechanism,  hearing, inquiry or investigation),  judgments, fines, penalties and
amounts paid in  settlement  (if such  settlement  is approved in advance by the
Company,  which  approval  shall not be  unreasonably  withheld),  actually  and
reasonably incurred, of any Claim and any federal, state, local or foreign taxes
imposed on the  Indemnitee  as a result of the  actual or deemed  receipt of any
payments under this Agreement.

                  (f)  "Expense  Advance"  shall  mean a payment  to  Indemnitee
pursuant  to Section 3 of  Expenses  in advance  of the  settlement  of or final
judgement in any action,  suit,  proceeding or  alternative  dispute  resolution
mechanism, hearing, inquiry or investigation which constitutes a Claim.


                                       -2-






                  (g) "Independent Legal Counsel" shall mean an attorney or firm
of attorneys, selected in accordance with the provisions of Section 2(d) hereof,
who shall not have  otherwise  performed  services for the Company or Indemnitee
within the last three years (other than with respect to matters  concerning  the
rights of Indemnitee under this Agreement, or of other indemnitees under similar
indemnity agreements).

                  (h) References to "other  enterprises"  shall include employee
benefit plans;  references to "fines" shall include any excise taxes assessed on
Indemnitee with respect to an employee  benefit plan; and references to "serving
at the request of the Company" shall include any service as a director, officer,
employee, agent or fiduciary of the Company which imposes duties on, or involves
services by, such director,  officer,  employee, agent or fiduciary with respect
to an employee  benefit plan,  its  participants  or its  beneficiaries;  and if
Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to
be in the interest of the participants and  beneficiaries of an employee benefit
plan,  Indemnitee  shall be deemed to have acted in a manner "not opposed to the
best interests of the Company" as referred to in this Agreement.

                  (i) "Reviewing Party" shall mean, subject to the provisions of
Section  2(d),  any  person  or body  appointed  by the  Board of  Directors  in
accordance with applicable law to review the Company's obligations hereunder and
under  applicable  law,  which may include a member or members of the  Company's
Board of Directors,  Independent Legal Counsel or any other person or body not a
party to the particular Claim for which Indemnitee is seeking indemnification.

                  (j)  "Section"  refers to a section of this  Agreement  unless
otherwise indicated.

                  (k)  "Voting  Securities"  shall  mean any  securities  of the
Company that vote generally in the election of directors.

         2.       Indemnification.

                  (a) Indemnification of Expenses.  Subject to the provisions of
Section 2(b) below,  the Company shall indemnify  Indemnitee for Expenses to the
fullest extent permitted by law if Indemnitee was or is or becomes a party to or
witness  or other  participant  in,  or is  threatened  to be made a party to or
witness or other  participant  in, any Claim (whether by reason of or arising in
part out of a Covered  Event),  including  all interest,  assessments  and other
charges paid or payable in connection with or in respect of such Expenses.

                  (b) Review of Indemnification Obligations. Notwithstanding the
foregoing,  in the event any Reviewing Party shall have determined (in a written
opinion,  in any case in which Independent Legal Counsel is the Reviewing Party)
that  Indemnitee is not entitled to be indemnified  hereunder  under  applicable
law, (i) the Company shall have no further obligation under Section 2(a) to make
any  payments  to  Indemnitee  not  made  prior  to such  determination  by such
Reviewing  Party,  and (ii) the Company  shall be entitled to be  reimbursed  by
Indemnitee  (who  hereby  agrees to  reimburse  the  Company)  for all  Expenses
theretofore  paid to  Indemnitee to which  Indemnitee is not entitled  hereunder
under  applicable law;  provided,  however,  that if Indemnitee has commenced or
thereafter  commences legal proceedings in a court of competent  jurisdiction to
secure a determination that Indemnitee is entitled to be indemnified


                                       -3-






hereunder under  applicable law, any  determination  made by any Reviewing Party
that Indemnitee is not entitled to be indemnified hereunder under applicable law
shall not be binding  and  Indemnitee  shall not be required  to  reimburse  the
Company for any Expenses  theretofore  paid in indemnifying  Indemnitee  until a
final  judicial  determination  is made with  respect  thereto  (as to which all
rights  of  appeal  therefrom  have  been  exhausted  or  lapsed).  Indemnitee's
obligation to reimburse  the Company for any Expenses  shall be unsecured and no
interest shall be charged thereon.

                  (c) Indemnitee  Rights on Unfavorable  Determination;  Binding
Effect.  If any Reviewing Party determines that Indemnitee  substantively is not
entitled to be indemnified  hereunder in whole or in part under  applicable law,
Indemnitee  shall  have the right to  commence  litigation  seeking  an  initial
determination  by the  court  or  challenging  any  such  determination  by such
Reviewing  Party or any aspect  thereof,  including  the legal or factual  bases
therefor,  and,  subject to the  provisions  of Section 15, the  Company  hereby
consents to service of process and to appear in any such proceeding. Absent such
litigation,  any  determination  by any Reviewing  Party shall be conclusive and
binding on the Company and Indemnitee.

                  (d) Selection of Reviewing Party;  Change in Control. If there
has not been a Change in Control,  any Reviewing  Party shall be selected by the
Board of Directors, and if there has been such a Change in Control (other than a
Change in Control which has been  approved by a majority of the Company's  Board
of Directors who were  directors  immediately  prior to such Change in Control),
any Reviewing Party with respect to all matters  thereafter  arising  concerning
the rights of Indemnitee to  indemnification of Expenses under this Agreement or
any other  agreement or under the  Company's  Certificate  of  Incorporation  or
Bylaws as now or  hereafter  in effect,  or under any other  applicable  law, if
desired by Indemnitee, shall be Independent Legal Counsel selected by Indemnitee
and approved by the Company (which approval shall not be unreasonably withheld).
Such  counsel,  among other  things,  shall  render its  written  opinion to the
Company and  Indemnitee  as to whether and to what  extent  Indemnitee  would be
entitled to be indemnified hereunder under applicable law and the Company agrees
to abide by such opinion.  The Company agrees to pay the reasonable  fees of the
Independent  Legal Counsel referred to above and to indemnify fully such counsel
against any and all expenses (including  attorneys' fees),  claims,  liabilities
and  damages  arising out of or relating  to this  Agreement  or its  engagement
pursuant  hereto.  Notwithstanding  any other provision of this  Agreement,  the
Company shall not be required to pay Expenses of more than one Independent Legal
Counsel in connection with all matters concerning a single Indemnitee,  and such
Independent  Legal Counsel shall be the Independent Legal Counsel for any or all
other  Indemnitees  unless  (i) the  Company  otherwise  determines  or (ii) any
Indemnity shall provide a written statement setting forth in detail a reasonable
objection to such Independent Legal Counsel representing other Indemnitees.

                  (e) Mandatory Payment of Expenses.  Notwithstanding  any other
provision of this  Agreement  other than  Section 10 hereof,  to the extent that
Indemnitee has been  successful on the merits or otherwise,  including,  without
limitation,  the  dismissal of an action  without  prejudice,  in defense of any
Claim,  Indemnitee  shall  be  indemnified  against  all  Expenses  incurred  by
Indemnitee in connection therewith.


                                       -4-






         3.       Expense Advances.

                  (a)  Obligation  to Make Expense  Advances.  The Company shall
make Expense Advances to Indemnitee upon receipt of a written  undertaking by or
on behalf of the  Indemnitee  to repay such  amounts if it shall  ultimately  be
determined  that the Indemnitee is not entitled to be  indemnified  therefore by
the Company.

                  (b)  Form  of  Undertaking.  Any  written  undertaking  by the
Indemnitee  to repay any Expense  Advances  hereunder  shall be unsecured and no
interest shall be charged thereon.

                  (c) Determination of Reasonable Expense Advances.  The parties
agree that for the purposes of any Expense Advance for which Indemnitee has made
written demand to the Company in accordance  with this  Agreement,  all Expenses
included in such Expense Advance that are certified by affidavit of Indemnitee's
counsel as being reasonable shall be presumed conclusively to be reasonable.

         4.       Procedures for Indemnification and Expense Advances.

                  (a) Timing of Payments.  All  payments of Expenses  (including
without limitation  Expense Advances) by the Company to the Indemnitee  pursuant
to this Agreement  shall be made to the fullest extent  permitted by law as soon
as practicable  after written demand by Indemnitee  therefor is presented to the
Company,  but in no event later than  forty-five  (45)  business days after such
written demand by Indemnitee is presented to the Company,  except in the case of
Expense  Advances,  which shall be made no later than twenty (20)  business days
after such written demand by Indemnitee is presented to the Company.

                  (b)  Notice/Cooperation by Indemnitee.  Indemnitee shall, as a
condition  precedent to  Indemnitee's  right to be indemnified  or  Indemnitee's
right to receive Expense Advances under this Agreement,  give the Company notice
in writing as soon as practicable of any Claim made against Indemnitee for which
indemnification  will or could be sought  under  this  Agreement.  Notice to the
Company shall be directed to the Chief  Executive  Officer of the Company at the
address shown on the signature  page of this Agreement (or such other address as
the Company shall designate in writing to Indemnitee).  In addition,  Indemnitee
shall give the Company such  information  and  cooperation  as it may reasonably
require and as shall be within Indemnitee's power.

                  (c) No  Presumptions;  Burden of Proof.  For  purposes of this
Agreement, the termination of any Claim by judgment,  order, settlement (whether
with  or  without  court  approval)  or  conviction,  or  upon  a plea  of  nolo
contendere,  or its equivalent,  shall not create a presumption  that Indemnitee
did not meet any particular standard of conduct or have any particular belief or
that a court  has  determined  that  indemnification  is not  permitted  by this
Agreement or applicable  law. In addition,  neither the failure of any Reviewing
Party  to  have  made a  determination  as to  whether  Indemnitee  has  met any
particular  standard  of conduct  or had any  particular  belief,  nor an actual
determination  by any Reviewing  Party that Indemnitee has not met such standard
of  conduct  or did not have such  belief,  prior to the  commencement  of legal
proceedings  by Indemnitee to secure a judicial  determination  that  Indemnitee
should be indemnified under this Agreement or applicable law, shall be a defense
to  Indemnitee's  claim or create a presumption  that Indemnitee has not met any
particular standard of conduct or did not have any


                                       -5-






particular  belief.  In connection with any determination by any Reviewing Party
or  otherwise  as to  whether  the  Indemnitee  is  entitled  to be  indemnified
hereunder,  the  burden  of proof  shall be on the  Company  to  establish  that
Indemnitee is not so entitled.

                  (d) Notice to Insurers.  If, at the time of the receipt by the
Company of a notice of a Claim pursuant to Section 4(b) hereof,  the Company has
liability insurance in effect which may cover such Claim, the Company shall give
prompt  notice of the  commencement  of such Claim to the insurers in accordance
with the  procedures  set forth in the  respective  policies.  The Company shall
thereafter take all necessary or desirable action to cause such insurers to pay,
on behalf of the  Indemnitee,  all amounts  payable as a result of such Claim in
accordance with the terms of such policies.

                  (e)  Selection of Counsel.  In the event the Company  shall be
obligated hereunder to provide  indemnification for or make any Expense Advances
with respect to the Expenses of any Claim, the Company, if appropriate, shall be
entitled to assume the defense of such Claim with counsel approved by Indemnitee
(which  approval  shall  not be  unreasonably  withheld)  upon the  delivery  to
Indemnitee of written notice of the Company's  election to do so. After delivery
of such notice, approval of such counsel by Indemnitee and the retention of such
counsel by the Company,  the Company will not be liable to Indemnitee under this
Agreement for any fees or expenses of separate counsel subsequently  employed by
or on behalf of Indemnitee  with respect to the same Claim;  provided,  however,
that,  (i)  Indemnitee  shall  have the  right to employ  Indemnitee's  separate
counsel in any such Claim at Indemnitee's expense and (ii) if (A) the employment
of separate counsel by Indemnitee has been previously authorized by the Company,
(B) Indemnitee  shall have reasonably  concluded that there may be a conflict of
interest  between the Company and Indemnitee in the conduct of any such defense,
or (C) the Company  shall not  continue  to retain  such  counsel to defend such
Claim,  then the fees and expenses of  Indemnitee's  separate  counsel  shall be
Expenses for which  Indemnitee may receive  indemnification  or Expense Advances
hereunder.

         5.       Additional Indemnification Rights; Nonexclusivity.

                  (a)  Scope.   The  Company  hereby  agrees  to  indemnify  the
Indemnitee to the fullest  extent  permitted by law,  notwithstanding  that such
indemnification  is not specifically  authorized by the other provisions of this
Agreement,  the Company's Certificate of Incorporation,  the Company's Bylaws or
by statute.  In the event of any change after the date of this  Agreement in any
applicable  law,  statute  or  rule  which  expands  the  right  of  a  Delaware
corporation  to  indemnify  a member of its board of  directors  or an  officer,
employee,  agent or  fiduciary,  it is the  intent of the  parties  hereto  that
Indemnitee shall enjoy by this Agreement the greater  benefits  afforded by such
change.  In the event of any change in any applicable law, statute or rule which
narrows the right of a Delaware  corporation  to indemnify a member of its board
of directors or an officer,  employee,  agent or fiduciary,  such change, to the
extent not otherwise required by such law, statute or rule to be applied to this
Agreement,  shall have no effect on this  Agreement or the  parties'  rights and
obligations hereunder except as set forth in Section 10(a) hereof.

                  (b)  Nonexclusivity.  The  indemnification  and the payment of
Expense  Advances  provided by this Agreement shall be in addition to any rights
to  which  Indemnitee  may  be  entitled  under  the  Company's  Certificate  of
Incorporation,  its Bylaws,  any other  agreement,  any vote of  stockholders or
disinterested  directors,  the General Corporation Law of the State of Delaware,
or otherwise.  The  indemnification and the payment of Expense Advances provided
under this Agreement shall continue as

                                       -6-






to Indemnitee  for any action taken or not taken while serving in an indemnified
capacity even though subsequent  thereto  Indemnitee may have ceased to serve in
such capacity.

         6. No  Duplication  of Payments.  The Company shall not be liable under
this  Agreement  to make any payment in  connection  with any Claim made against
Indemnitee to the extent  Indemnitee  has otherwise  actually  received  payment
(under  any  insurance  policy,   provision  of  the  Company's  Certificate  of
Incorporation, Bylaws or otherwise) of the amounts otherwise payable hereunder.

         7.  Partial  Indemnification.  If  Indemnitee  is  entitled  under  any
provision  of this  Agreement  to  indemnification  by the Company for some or a
portion of Expenses incurred in connection with any Claim, but not, however, for
all of the total  amount  thereof,  the  Company  shall  nevertheless  indemnify
Indemnitee for the portion of such Expenses to which Indemnitee is entitled.

         8. Mutual  Acknowledgment.  Both the Company and Indemnitee acknowledge
that in certain instances,  federal law or applicable public policy may prohibit
the Company from  indemnifying  its directors,  officers,  employees,  agents or
fiduciaries  under this  Agreement  or  otherwise.  Indemnitee  understands  and
acknowledges that the Company has undertaken or may be required in the future to
undertake with the Securities and Exchange  Commission to submit the question of
indemnification  to a court in certain  circumstances for a determination of the
Company's right under public policy to indemnify Indemnitee.

         9. Liability  Insurance.  To the extent the Company maintains liability
insurance applicable to directors,  officers,  employees, agents or fiduciaries,
Indemnitee  shall be  covered  by such  policies  in such a manner as to provide
Indemnitee  the same rights and benefits as are  provided to the most  favorably
insured of the  Company's  directors,  if  Indemnitee  is a director;  or of the
Company's  officers,  if  Indemnitee  is not a director of the Company but is an
officer; or of the Company's key employees, agents or fiduciaries, if Indemnitee
is not an officer or director but is a key employee, agent or fiduciary.

         10. Exceptions.  Notwithstanding any other provision of this Agreement,
the Company shall not be obligated pursuant to the terms of this Agreement:

                  (a) Excluded Action or Omissions.  To indemnify Indemnitee for
Expenses resulting from acts,  omissions or transactions for which Indemnitee is
prohibited  from  receiving  indemnification  under this Agreement or applicable
law; provided,  however,  that  notwithstanding any limitation set forth in this
Section 10(a)  regarding the  Company's  obligation to provide  indemnification,
Indemnitee  shall be  entitled  under  Section  3 to  receive  Expense  Advances
hereunder  with  respect  to any such  Claim  unless  and  until a court  having
jurisdiction  over the Claim shall have made a final judicial  determination (as
to which all rights of appeal  therefrom  have been  exhausted  or lapsed)  that
Indemnitee has engaged in acts,  omissions or transactions  for which Indemnitee
is prohibited from receiving  indemnification under this Agreement or applicable
law.

                  (b) Claims  Initiated  by  Indemnitee.  To  indemnify  or make
Expense  Advances to  Indemnitee  with  respect to Claims  initiated  or brought
voluntarily  by  Indemnitee  and  not  by  way  of  defense,   counterclaim   or
cross-claim,  except  (i) with  respect to  actions  or  proceedings  brought to
establish  or enforce a right to  indemnification  under this  Agreement  or any
other agreement or insurance policy or


                                       -7-






under the Company's  Certificate of  Incorporation or Bylaws now or hereafter in
effect  relating to Claims for  Covered  Events,  (ii) in specific  cases if the
Board of Directors  has approved the  initiation  or bringing of such Claim,  or
(iii)  as  otherwise   required  under  Section  145  of  the  Delaware  General
Corporation Law (relating to indemnification of officers,  directors,  employees
and agents,  and  insurance),  regardless  of whether  Indemnitee  ultimately is
determined  to  be  entitled  to  such  indemnification,  Expense  Advances,  or
insurance recovery, as the case may be.

                  (c)  Lack of  Good  Faith.  To  indemnify  Indemnitee  for any
Expenses incurred by the Indemnitee with respect to any action instituted (i) by
Indemnitee  to  enforce  or  interpret  this   Agreement,   if  a  court  having
jurisdiction  over such action determines as provided in Section 13 that each of
the material  assertions  made by the  Indemnitee as a basis for such action was
not  made in  good  faith  or was  frivolous,  or (ii) by or in the  name of the
Company to enforce or interpret this Agreement,  if a court having  jurisdiction
over such action  determines as provided in Section 13 that each of the material
defenses  asserted  by  Indemnitee  in such  action was made in bad faith or was
frivolous.

                  (d) Claims Under Section  16(b).  To indemnify  Indemnitee for
expenses  and the  payment  of profits  arising  from the  purchase  and sale by
Indemnitee  of  securities  in  violation  of  Section  16(b) of the  Securities
Exchange Act of 1934, as amended,  or any similar successor  statute;  provided,
however,  that  notwitstanding  any  limitation  set forth in this Section 10(d)
regarding the Company's obligations to provide indemnification, Indemnitee shall
be entitled under Section 3 to receive Expense  Advances  hereunder with respect
to any such Claim  unless and until a court having  jurisdiction  over the Claim
shall have made a final  determination  (as to which all  rights of appeal  have
been exhausted or lapsed) that Indemnitee has violated said statute.

         11.  Counterparts.  This  Agreement  may be  executed  in  one or  more
counterparts, each of which shall constitute an original.

         12. Binding  Effect;  Successors and Assigns.  This Agreement  shall be
binding  upon and inure to the  benefit  of and be  enforceable  by the  parties
hereto  and  their  respective  successors,  assigns  (including  any  direct or
indirect  successor by purchase,  merger,  consolidation  or otherwise to all or
substantially all of the business or assets of the Company),  spouses, heirs and
personal  and legal  representatives.  The Company  shall  require and cause any
successor  (whether  direct  or  indirect,  and  whether  by  purchase,  merger,
consolidation or otherwise) to all, substantially all, or a substantial part, of
the  business  or  assets  of the  Company,  by  written  agreement  in form and
substance  satisfactory to Indemnitee,  expressly to assume and agree to perform
this  Agreement in the same manner and to the same extent that the Company would
be required to perform if no such  succession  had taken place.  This  Agreement
shall continue in effect regardless of whether Indemnitee  continues to serve as
a director, officer, employee, agent or fiduciary (as applicable) of the Company
or of any other enterprise at the Company's request.

         13.   Expenses   Incurred  in  Action   Relating  to   Enforcement   or
Interpretation.  In the event that any action is instituted by Indemnitee  under
this  Agreement or under any  liability  insurance  policies  maintained  by the
Company to enforce or interpret  any of the terms hereof or thereof,  Indemnitee
shall be entitled to be indemnified for all Expenses incurred by Indemnitee with
respect  to  such  action  (including  without   limitation   attorneys'  fees),
regardless of whether Indemnitee is ultimately successful


                                       -8-





in such action, unless as a part of such action a court having jurisdiction over
such  action  makes a final  judicial  determination  (as to which all rights of
appeal  therefrom  have been  exhausted  or  lapsed)  that each of the  material
assertions  made by  Indemnitee  as a basis for such action was not made in good
faith or was  frivolous;  provided,  however,  that until  such  final  judicial
determination  is made,  Indemnitee shall be entitled under Section 3 to receive
payment of Expense Advances  hereunder with respect to such action. In the event
of an action instituted by or in the name of the Company under this Agreement to
enforce or interpret  any of the terms of this  Agreement,  Indemnitee  shall be
entitled to be indemnified for all Expenses incurred by Indemnitee in defense of
such action  (including  without  limitation  costs and expenses  incurred  with
respect to Indemnitee's  counterclaims  and  cross-claims  made in such action),
unless as a part of such  action a court  having  jurisdiction  over such action
makes a final judicial determination (as to which all rights of appeal therefrom
have been  exhausted or lapsed) that each of the material  defenses  asserted by
Indemnitee  in such  action  was made in bad faith or was  frivolous;  provided,
however, that until such final judicial  determination is made, Indemnitee shall
be entitled  under Section 3 to receive  payment of Expense  Advances  hereunder
with respect to such action.

         14.  Period of  Limitations.  No legal  action  shall be brought and no
cause of action  shall be  asserted  by or in the right of the  Company  against
Indemnitee,  Indemnitee's estate,  spouse, heirs, executors or personal or legal
representatives  after the  expiration  of two years from the date of accrual of
such cause of action,  and any claim or cause of action of the Company  shall be
extinguished and deemed released unless asserted by the timely filing of a legal
action  within  such two year  period;  provided,  however,  that if any shorter
period of limitations is otherwise  applicable to any such cause of action, such
shorter period shall govern.

         15. Notice.  All notices,  requests,  demands and other  communications
under this  Agreement  shall be in writing and shall be deemed duly given (i) if
delivered  by hand and  signed for by the party  addressed,  on the date of such
delivery,  or (ii) if mailed  by  domestic  certified  or  registered  mail with
postage prepaid, on the third business day after the date postmarked.  Addresses
for notice to either party are as shown on the signature page of this Agreement,
or as subsequently modified by written notice.

         16. Consent to  Jurisdiction.  The Company and  Indemnitee  each hereby
irrevocably  consent to the  jurisdiction of the courts of the State of Delaware
for all purposes in connection with any action or proceeding which arises out of
or relates to this  Agreement  and agree that any action  instituted  under this
Agreement  shall be commenced,  prosecuted  and  continued  only in the Court of
Chancery of the State of Delaware in and for New Castle  County,  which shall be
the exclusive and only proper forum for adjudicating such a claim.

         17.  Severability.  The provisions of this Agreement shall be severable
in the event that any of the provisions hereof (including any provision within a
single  section,  paragraph  or  sentence)  are  held  by a court  of  competent
jurisdiction to be invalid, void or otherwise  unenforceable,  and the remaining
provisions  shall remain  enforceable  to the fullest  extent  permitted by law.
Furthermore,  to the fullest extent  possible,  the provisions of this Agreement
(including  without  limitation  each portion of this  Agreement  containing any
provision  held to be  invalid,  void or  otherwise  unenforceable,  that is not
itself invalid,  void or unenforceable)  shall be construed so as to give effect
to  the  intent   manifested   by  the  provision   held  invalid,   illegal  or
unenforceable.


                                       -9-





         18.  Choice  of  Law.  This  Agreement,   and  all  rights,   remedies,
liabilities,  powers  and  duties of the  parties  to this  Agreement,  shall be
governed by and construed in  accordance  with the laws of the State of Delaware
as  applied to  contracts  between  Delaware  residents  entered  into and to be
performed  entirely in the State of Delaware  without  regard to  principles  of
conflicts of laws.

         19.  Subrogation.  In the event of payment  under this  Agreement,  the
Company  shall be  subrogated to the extent of such payment to all of the rights
of recovery of Indemnitee, who shall execute all documents required and shall do
all acts that may be  necessary  to secure such rights and to enable the Company
effectively to bring suit to enforce such rights.

         20. Amendment and Termination. No amendment, modification,  termination
or  cancellation  of this Agreement  shall be effective  unless it is in writing
signed by both the parties  hereto.  No waiver of any of the  provisions of this
Agreement  shall be  deemed  to be or shall  constitute  a waiver  of any  other
provisions  hereof (whether or not similar),  nor shall such waiver constitute a
continuing waiver.

         21.  Integration  and Entire  Agreement.  This Agreement sets forth the
entire  understanding  between the parties  hereto and supersedes and merges all
previous  written  and  oral  negotiations,   commitments,   understandings  and
agreements relating to the subject matter hereof between the parties hereto.

         22. No Construction as Employment Agreement.  Nothing contained in this
Agreement  shall be construed as giving  Indemnitee  any right to be retained in
the employ of the Company or any of its subsidiaries or affiliated entities.

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


JENNER TECHNOLOGIES, INC.                              AGREED TO AND ACCEPTED


By:                                                    -------------------------
   -------------------------                           Signature

Title:                                                 ------------------------
      ----------------------                           Print Name


Address:    2010 Crow Canyon Place                     Address:
            San Ramon, California  94583                       -----------------
                                                               -----------------




                                      -10-





                                                                    EXHIBIT 10.2


                               JENNER TECHNOLOGIES
                                 1993 STOCK PLAN


         1. Purposes of the Plan. The purposes of this Stock Plan are to attract
and  retain  the  best   available   personnel  for  positions  of   substantial
responsibility,  to provide additional incentive to Employees and Consultants of
the Company  and its  Subsidiaries  and to promote the success of the  Company's
business.  Options  granted  under the Plan may be incentive  stock  options (as
defined  under  Section  422 of the Code) or  non-statutory  stock  options,  as
determined by the Administrator at the time of grant of an option and subject to
the  applicable  provisions  of Section  422 of the Code,  as  amended,  and the
regulations  promulgated  thereunder.  Stock purchase rights may also be granted
under the Plan.

         2. Definitions. As used herein, the following definitions shall apply:

                  (a)  "Administrator"  means the Board or any of its Committees
appointed pursuant to Section 4 of the Plan.

                  (b) "Board" means the Board of Directors of the Company.

                  (c)  "Code"  means  the  Internal  Revenue  Code of  1986,  as
amended.

                  (d)  "Committee"  means a Committee  appointed by the Board of
Directors in accordance with Section 4 of the Plan.

                  (e) "Common Stock" means the Common Stock of the Company.

                  (f)  "Company"   means  Jenner   Technologies,   a  California
corporation.

                  (g) "Consultant" means any person,  including an advisor,  who
is engaged by the Company or any Parent or Subsidiary to render  services and is
compensated  for  such  services,  and  any  director  of  the  Company  whether
compensated  for such  services  or not  provided  that if and in the  event the
Company registers any class of any equity security pursuant to the Exchange Act,
the  term  Consultant  shall  thereafter  not  include  directors  who  are  not
compensated for their services or are paid only a director's fee by the Company.

                  (h)  "Continuous  Status as an Employee or  Consultant"  means
that the employment or consulting  relationship is not interrupted or terminated
by the Company,  any Parent or Subsidiary.  Continuous  Status as an Employee or
Consultant shall not be considered  interrupted in the case of: (i) any leave of
absence  approved by the Board,  including sick leave,  military  leave,  or any
other personal leave;  provided,  however,  that for purposes of Incentive Stock
Options,  any such leave may not exceed  ninety (90) days,  unless  reemployment
upon the expiration of such leave is guaranteed by contract  (including  certain
Company policies) or statute; or (ii) transfers between locations of the Company
or between the Company, its Parent, its Subsidiaries or its successor.


                                       






                  (i)  "Employee"  means  any  person,  including  officers  and
directors,  employed by the Company or any Parent or  Subsidiary of the Company.
The  payment of a  director's  fee by the  Company  shall not be  sufficient  to
constitute "employment" by the Company.

                  (j) "Exchange Act" means the Securities  Exchange Act of 1934,
as amended.

                  (k) "Fair Market  Value" means,  as of any date,  the value of
Common Stock determined as follows:

                  (i) If the  Common  Stock is listed on any  established  stock
exchange or a national market system including  without  limitation the National
Market System of the National Association of Securities Dealers,  Inc. Automated
Quotation  ("NASDAQ")  System,  its Fair Market Value shall be the closing sales
price for such stock (or the closing bid, if no sales were  reported,  as quoted
on such exchange or system for the last market  trading day prior to the time of
determination)  as reported in The Wall Street  Journal or such other  source as
the Administrator deems reliable;

                  (ii) If the Common  Stock is quoted on the NASDAQ  System (but
not on the National Market System  thereof) or regularly  quoted by a recognized
securities  dealer but selling  prices are not  reported,  its Fair Market Value
shall be the mean between the high bid and low asked prices for the Common Stock
or;

                  (iii) In the absence of an  established  market for the Common
Stock,  the Fair Market Value  thereof  shall be determined in good faith by the
Administrator.

                  (l)  "Incentive  Stock  Option"  means an Option  intended  to
qualify as an incentive  stock  option  within the meaning of Section 422 of the
Code.

                  (m)  "Nonstatutory  Stock Option" means an Option not intended
to qualify as an Incentive Stock Option.

                  (n)  "Option"  means a stock  option  granted  pursuant to the
Plan.

                  (o)  "Optioned  Stock"  means the Common  Stock  subject to an
Option or a Stock Purchase Right.

                  (p) "Optionee" means an Employee or Consultant who receives an
Option or Stock Purchase Right.

                  (q)  "Parent"  means a "parent  corporation",  whether  now or
hereafter existing, as defined in Section 424(e) of the Code.

                  (r) "Plan" means this 1993 Stock Plan.



                                       -2-






                  (s)  "Restricted  Stock" means shares of Common Stock acquired
pursuant to a grant of a Stock Purchase Right under Section 11 below.

                  (t) "Share" means a share of the Common Stock,  as adjusted in
accordance with  Section 12 below.

                  (u) "Stock  Purchase Right" means the right to purchase Common
Stock pursuant to Section 11 below.

                  (v) "Subsidiary" means a "subsidiary corporation", whether now
or hereafter existing, as defined in Section 424(f) of the Code.

         3. Stock Subject to the Plan.  Subject to the  provisions of Section 12
of the Plan,  the maximum  aggregate  number of shares which may be optioned and
sold  under the Plan is  1,250,000  shares of Common  Stock.  The  shares may be
authorized, but unissued, or reacquired Common Stock.

                  If an Option  should  expire or become  unexercisable  for any
reason without having been exercised in full, the unpurchased  Shares which were
subject  thereto  shall,  unless  the Plan shall  have been  terminated,  become
available for future grant under the Plan.

         4. Administration of the Plan.

                  (a) Initial Plan  Procedure.  Prior to the date,  if any, upon
which the  Company  becomes  subject  to the  Exchange  Act,  the Plan  shall be
administered by the Board or a committee appointed by the Board.

                  (b) Plan  Procedure  After the Date,  if any,  Upon  Which the
Company Becomes Subject to the Exchange Act.

                           (i)  Administration  With  Respect to  Directors  and
Officers.  With  respect  to  grants  of  Options  or Stock  Purchase  Rights to
Employees who are also  officers or directors of the Company,  the Plan shall be
administered by (A) the Board if the Board may administer the Plan in compliance
with Rule 16b-3  promulgated  under the  Exchange Act or any  successor  thereto
("Rule  16b-3")  with  respect to a plan  intended  to qualify  thereunder  as a
discretionary plan, or (B) a committee designated by the Board to administer the
Plan,  which  committee  shall be  constituted in such a manner as to permit the
Plan to comply  with Rule  16b-3  with  respect  to a plan  intended  to qualify
thereunder  as a  discretionary  plan.  Once  appointed,  such  Committee  shall
continue to serve in its  designated  capacity until  otherwise  directed by the
Board.  From time to time the Board may increase the size of the  Committee  and
appoint additional  members thereof,  remove members (with or without cause) and
appoint new members in substitution  therefor,  fill vacancies,  however caused,
and remove all members of the Committee and thereafter  directly  administer the
Plan, all to the extent  permitted by Rule 16b-3 with respect to a plan intended
to qualify thereunder as a discretionary plan.



                                       -3-






                           (ii) Multiple  Administrative Bodies. If permitted by
Rule 16b-3,  the Plan may be  administered  by different  bodies with respect to
directors,  non-director  officers and Employees  who are neither  directors nor
officers.

                           (iii)  Administration With Respect to Consultants and
Other  Employees.  With respect to grants of Options or Stock Purchase Rights to
Employees or Consultants who are neither  directors nor officers of the Company,
the Plan shall be administered by (A) the Board or (B) a committee designated by
the Board,  which  committee shall be constituted in such a manner as to satisfy
the legal requirements  relating to the administration of incentive stock option
plans, if any, of California  corporate and securities laws, of the Code, and of
any applicable  stock exchange (the  "Applicable  Laws").  Once appointed,  such
Committee  shall  continue to serve in its designated  capacity until  otherwise
directed by the Board.  From time to time the Board may increase the size of the
Committee  and appoint  additional  members  thereof,  remove  members  (with or
without cause) and appoint new members in substitution therefor, fill vacancies,
however caused, and remove all members of the Committee and thereafter  directly
administer the Plan, all to the extent permitted by the Applicable Laws.

                  (c) Powers of the Administrator.  Subject to the provisions of
the Plan and in the case of a Committee,  the specific  duties  delegated by the
Board  to  such  Committee,   and  subject  to  the  approval  of  any  relevant
authorities,  including the approval,  if required,  of any stock  exchange upon
which the Common Stock is listed, the Administrator shall have the authority, in
its discretion:

                           (i) to determine  the Fair Market Value of the Common
Stock, in accordance with Section 2(k) of the Plan;

                           (ii) to select the  Consultants and Employees to whom
Options and Stock Purchase Rights may from time to time be granted hereunder;

                           (iii) to determine whether and to what extent Options
and Stock Purchase Rights or any combination thereof are granted hereunder;

                           (iv) to  determine  the  number  of  shares of Common
Stock to be covered by each such award granted hereunder;

                           (v) to approve  forms of agreement  for use under the
Plan;

                           (vi) to  determine  the  terms  and  conditions,  not
inconsistent with the terms of the Plan, of any award granted hereunder;

                           (vii) to reduce the  exercise  price of any Option to
the then  current Fair Market Value if the Fair Market Value of the Common Stock
covered  by such  Option  shall  have  declined  since the date the  Option  was
granted; and


                                       -4-






                           (viii)  to  determine  the  terms  and   restrictions
applicable  to Stock  Purchase  Rights and the  Restricted  Stock  purchased  by
exercising such Stock Purchase Rights.

                  (d)  Effect  of  Administrator's   Decision.   All  decisions,
determinations  and  interpretations  of the  Administrator  shall be final  and
binding on all Optionees and any other holders of any Options or Stock  Purchase
Rights.

         5. Eligibility.

                  (a)  Nonstatutory  Stock Options and Stock Purchase Rights may
be granted to Employees and Consultants.  Incentive Stock Options may be granted
only to Employees.  An Employee or Consultant  who has been granted an Option or
Stock Purchase Right may, if otherwise  eligible,  be granted additional Options
or Stock Purchase Rights.

                  (b) Each Option  shall be  designated  in the  written  option
agreement as either an Incentive  Stock Option or a  Nonstatutory  Stock Option.
However,  notwithstanding  such  designations,  to the extent that the aggregate
Fair Market  Value of the Shares with  respect to which  Options  designated  as
Incentive  Stock  Options  are  exercisable  for the first time by any  Optionee
during  any  calendar  year  (under  all plans of the  Company  or any Parent or
Subsidiary)   exceeds  $100,000,   such  excess  Options  shall  be  treated  as
Nonstatutory Stock Options.

                  (c) For  purposes of Section  5(b),  Incentive  Stock  Options
shall be taken into  account in the order in which  they were  granted,  and the
Fair Market  Value of the Shares shall be  determined  as of the time the Option
with respect to such Shares is granted.

                  (d) The Plan shall not confer upon any Optionee any right with
respect to  continuation  of  employment  or  consulting  relationship  with the
Company,  nor  shall  it  interfere  in any way  with  his or her  right  or the
Company's right to terminate his or her employment or consulting relationship at
any time, with or without cause.

         6. Term of Plan.  The Plan shall become  effective  upon the earlier to
occur  of its  adoption  by the  Board  of  Directors  or  its  approval  by the
shareholders  of the Company as  described  in Section 18 of the Plan.  It shall
continue in effect for a term of ten (10) years unless sooner  terminated  under
Section 14 of the Plan.

         7. Term of Option.  The term of each Option shall be the term stated in
the Option Agreement; provided, however, that the term shall be no more than ten
(10) years from the date of grant thereof.  However, in the case of an Incentive
Stock Option granted to an Optionee who, at the time the Option is granted, owns
stock  representing  more  than ten  percent  (10%) of the  voting  power of all
classes of stock of the  Company or any  Parent or  Subsidiary,  the term of the
Option  shall be five (5) years from the date of grant  thereof or such  shorter
term as may be provided in the Option Agreement.


                                       -5-






         8. Option Exercise Price and Consideration.

                  (a) The per share  exercise  price for the Shares to be issued
pursuant to exercise of an Option  shall be such price as is  determined  by the
Board, but shall be subject to the following:

                           (i)      In the case of an Incentive Stock Option

                                    (A) granted to an Employee  who, at the time
of the grant of such Incentive Stock Option,  owns stock  representing more than
ten percent  (10%) of the voting power of all classes of stock of the Company or
any Parent or  Subsidiary,  the per Share  exercise  price shall be no less than
110% of the Fair Market Value per Share on the date of grant.

                                    (B) granted to any  Employee,  the per Share
exercise  price shall be no less than 100% of the Fair Market Value per Share on
the date of grant.

                           (ii)     In the case of a Nonstatutory Stock Option

                                    (A)  granted to a person who, at the time of
the grant of such Option, owns stock representing more than ten percent (10%) of
the  voting  power of all  classes,  of stock of the  Company  or any  Parent or
Subsidiary,  the per Share exercise price shall be no less than 110% of the Fair
Market Value per Share on the date of the grant.

                                    (B)  granted  to any  person,  the per Share
exercise  price shall be no less than 85% of the Fair Market  Value per Share on
the date of grant.

                  (b) The  consideration  to be paid for the Shares to be issued
upon exercise of an Option, including the method of payment, shall be determined
by the  Administrator  (and, in the case of an Incentive Stock Option,  shall be
determined  at the time of grant)  and may  consist  entirely  of (1) cash,  (2)
check,  (3)  promissory  note,  (4) other Shares which (x) in the case of Shares
acquired  upon  exercise of an Option either have been owned by the Optionee for
more than six months on the date of surrender or were not acquired,  directly or
indirectly,  from the  Company,  and (y) have a Fair Market Value on the date of
surrender  equal to the aggregate  exercise price of the Shares as to which said
Option shall be exercised,  (5) delivery of a properly  executed exercise notice
together with such other  documentation as the  Administrator and the broker, if
applicable,  shall  require to effect an exercise of the Option and  delivery to
the Company of the sale or loan proceeds  required to pay the exercise price, or
(6)  any  combination  of the  foregoing  methods  of  payment.  In  making  its
determination  as to the  type of  consideration  to  accept,  the  Board  shall
consider if  acceptance  of such  consideration  may be  reasonably  expected to
benefit the Company.

         9.       Exercise of Option.

                  (a)  Procedure  for  Exercise;  Rights as a  Shareholder.  Any
Option  granted  hereunder  shall be  exercisable  at such  times and under such
conditions as determined by the Board,


                                       -6-






including  performance criteria with respect to the Company and/or the Optionee,
and as shall be permissible under the terms of the Plan.

                           An Option may not be  exercised  for a fraction  of a
Share.

                           An  Option  shall  be  deemed  to be  exercised  when
written notice of such exercise has been given to the Company in accordance with
the terms of the Option by the person  entitled to exercise  the Option and full
payment for the Shares with  respect to which the Option is  exercised  has been
received by the Company.  Full payment may, as authorized by the Board,  consist
of any  consideration  and method of payment allowable under Section 8(b) of the
Plan. Until the issuance (as evidenced by the appropriate  entry on the books of
the Company or of a duly authorized  transfer agent of the Company) of the stock
certificate evidencing such Shares, no right to vote or receive dividends or any
other rights as a  shareholder  shall exist with respect to the Optioned  Stock,
notwithstanding the exercise of the Option. The Company shall issue (or cause to
be issued)  such stock  certificate  promptly  upon  exercise of the Option.  No
adjustment  will be made for a dividend or other right for which the record date
is prior to the date the stock  certificate  is issued,  except as  provided  in
Section 12 of the Plan.

                           Exercise of an Option in any manner shall result in a
decrease in the number of Shares which  thereafter  may be  available,  both for
purposes of the Plan and for sale under the  Option,  by the number of Shares as
to which the Option is exercised.

                  (b) Termination of Employment.  In the event of termination of
an Optionee's  Continuous  Status as an Employee or Consultant with the Company,
such  Optionee  may, but only within such period of time as is determined by the
Administrator, of at least thirty (30) days, with such determination in the case
of an Incentive  Stock Option not  exceeding  three (3) months after the date of
such  termination (but in no event later than the expiration date of the term of
such Option as set forth in the Option Agreement), exercise his or her Option to
the  extent  that  Optionee  was  entitled  to  exercise  it at the date of such
termination. To the extent that Optionee was not entitled to exercise the Option
at the date of such termination, or if Optionee does not exercise such Option to
the  extent so  entitled  within the time  specified  herein,  the Option  shall
terminate.

                  (c) Disability of Optionee.  Notwithstanding the provisions of
Section 9(b) above,  in the event of  termination  of an  Optionee's  Continuous
Status as an  Employee  or  Consultant  as a result  of his total and  permanent
disability,  Optionee  may, but only within  twelve (12) months from the date of
such  termination (but in no event later than the expiration date of the term of
such Option as set forth in the Option  Agreement),  exercise  the Option to the
extent otherwise entitled to exercise it at the date of such termination. To the
extent that  Optionee  was not  entitled  to exercise  the Option at the date of
termination,  or if  Optionee  does not  exercise  such  Option to the extent so
entitled within the time specified herein, the Option shall terminate.

                  (d)  Death of  Optionee.  In the  event of  termination  of an
Optionee's  Continuous  Status as an Employee or  Consultant  as a result of the
death of an Optionee,  the Option may be  exercised,  at any time within  twelve
(12) months following the date of death (but in no event later


                                       -7-






than the  expiration  date of the term of such Option as set forth in the Option
Agreement),  by the  Optionee's  estate or by a person who acquired the right to
exercise  the  Option by  bequest  or  inheritance,  but only to the  extent the
Optionee was entitled to exercise the Option at the date of death. To the extent
that  Optionee was not entitled to exercise the Option at the date of death,  or
if Optionee does not exercise  such Option to the extent so entitled  within the
time specified herein, the Option shall terminate.

                  (e) Rule 16b-3.. Options granted to persons subject to Section
16(b) of the  Exchange  Act must comply with Rule 16b-3 and shall  contain  such
additional  conditions or restrictions as may be required  thereunder to qualify
for the maximum  exemption  from  Section 16 of the Exchange Act with respect to
Plan transactions.

         10.  Non-Transferability  of Options and Stock Purchase Rights. Options
and Stock  Purchase  Rights may not be sold,  pledged,  assigned,  hypothecated,
transferred,  or disposed of in any manner  other than by will or by the laws of
descent  or  distribution  and may be  exercised,  during  the  lifetime  of the
Optionee, only by the Optionee.

         11.      Stock Purchase Rights.

                  (a) Rights to Purchase.  Stock  Purchase  Rights may be issued
either alone,  in addition to, or in tandem with other awards  granted under the
Plan  and/or  cash  awards  made  outside of the Plan.  After the  Administrator
determines  that it will offer Stock  Purchase  Rights under the Plan,  it shall
advise the offeree in writing of the terms,  conditions and restrictions related
to the offer,  including the number of Shares that such person shall be entitled
to  purchase,  the price to be paid,  and the time within which such person must
accept such offer, which shall in no event exceed thirty (30) days from the date
upon which the Administrator  made the determination to grant the Stock Purchase
Right.  The offer shall be accepted by execution of a Restricted  Stock purchase
agreement in the form determined by the Administrator. Shares purchased pursuant
to the  grant  of a  Stock  Purchase  Right  shall  be  referred  to  herein  as
"Restricted Stock."

                  (b) Repurchase  Option.  Unless the  Administrator  determines
otherwise,  the Restricted  Stock purchase  agreement  shall grant the Company a
repurchase option  exercisable upon the voluntary or involuntary  termination of
the purchaser's  employment with the Company for any reason  (including death or
Disability).   The  purchase  price  for  Shares  repurchased  pursuant  to  the
Restricted  Stock  purchase  agreement  shall be the original  price paid by the
purchaser and may be paid by cancellation  of any  indebtedness of the purchaser
to the Company.  The repurchase option shall lapse at such rate as the Committee
may determine, but at a minimum rate of 20% per year.

                  (c) Other Provisions.  The Restricted Stock purchase agreement
shall contain such other terms,  provisions and conditions not inconsistent with
the Plan as may be determined by the  Administrator in its sole  discretion.  In
addition, the provisions of Restricted Stock purchase agreements need not be the
same with respect to each purchaser.



                                      -8-






                  (d) Rights as a Shareholder.  Once the Stock Purchase Right is
exercised,  the  purchaser  shall  have  the  rights  equivalent  to  those of a
shareholder, and shall be a shareholder when his or her purchase is entered upon
the records of the duly authorized  transfer agent of the Company. No adjustment
will be made for a dividend or other right for which the record date is prior to
the date the Stock Purchase Right is exercised, except as provided in Section 12
of the Plan.

         12.      Adjustments Upon Changes in Capitalization or Merger.

                  (a) Changes in Capitalization.  Subject to any required action
by the shareholders of the Company, the number of shares of Common Stock covered
by each outstanding  Option or Stock Purchase Right, and the number of shares of
Common Stock which have been  authorized  for issuance  under the Plan but as to
which no Options or Stock  Purchase  Rights have yet been  granted or which have
been returned to the Plan upon  cancellation or expiration of an Option or Stock
Purchase  Right,  as well as the price per share of Common Stock covered by each
such  outstanding  Option  or Stock  Purchase  Right,  shall be  proportionately
adjusted for any  increase or decrease in the number of issued  shares of Common
Stock  resulting  from a stock  split,  reverse  stock  split,  stock  dividend,
combination or  reclassification  of the Common Stock,  or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of  consideration  by the Company;  provided,  however,  that  conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of  consideration."  Such adjustment shall be made by the Board,
whose  determination  in that respect  shall be final,  binding and  conclusive.
Except as  expressly  provided  herein,  no issuance by the Company of shares of
stock of any class, or securities convertible into shares of stock of any class,
shall affect, and no adjustment by reason thereof shall be made with respect to,
the  number or price of shares of  Common  Stock  subject  to an Option or Stock
Purchase Right.

                  (b) Dissolution or  Liquidation.  In the event of the proposed
dissolution or  liquidation of the Company,  the Board shall notify the Optionee
at least fifteen (15) days prior to such proposed  action.  To the extent it has
not been previously exercised, the Option or Stock Purchase Right will terminate
immediately prior to the consummation of such proposed action.

                  (c) Merger.  In the event of a merger of the  Company  with or
into another corporation, the Option or Stock Purchase Right shall be assumed or
an equivalent option or right shall be substituted by such successor corporation
or a parent or subsidiary of such successor corporation.  If, in such event, the
Option or Stock  Purchase  Right is not  assumed or  substituted,  the Option or
Stock  Purchase  Right  shall  terminate  as of the date of the  closing  of the
merger.  For the purposes of this paragraph,  the Option or Stock Purchase Right
shall be  considered  assumed  if,  following  the  merger,  the option or right
confers the right to purchase,  for each Share of Optioned  Stock subject to the
Option  or  Stock  Purchase  Right   immediately   prior  to  the  merger,   the
consideration (whether stock, cash, or other securities or property) received in
the merger by holders of Common Stock for each Share held on the effective  date
of the transaction (and if holders were offered a choice of  consideration,  the
type of  consideration  chosen by the holders of a majority  of the  outstanding
Shares);  provided,  however, that if such consideration  received in the merger
was not solely  common stock of the  successor  corporation  or its Parent,  the
Administrator may, with the


                                       -9-






consent  of the  successor  corporation  and the  participant,  provide  for the
consideration  to be received upon the exercise of the Option or Stock  Purchase
Right,  for each Share of Optioned Stock subject to the Option or Stock Purchase
Right,  to be solely  common stock of the  successor  corporation  or its Parent
equal in fair market value to the per share consideration received by holders of
Common Stock in the merger.

         13. Time of Granting  Options and Stock  Purchase  Rights.  The date of
grant of an Option or Stock Purchase Right shall, for all purposes,  be the date
on which the Administrator makes the determination granting such Option or Stock
Purchase Right, or such other date as is determined by the Board.  Notice of the
determination shall be given to each Employee or Consultant to whom an Option or
Stock Purchase  Right is so granted  within a reasonable  time after the date of
such grant.

         14.      Amendment and Termination of the Plan.

                  (a)  Amendment  and  Termination.  The  Board  may at any time
amend,  alter,  suspend or discontinue  the Plan, but no amendment,  alteration,
suspension or discontinuation shall be made which would impair the rights of any
Optionee  under any grant  theretofore  made,  without  his or her  consent.  In
addition,  to the extent necessary and desirable to comply with Rule 16b-3 under
the Exchange Act or with Section 422 of the Code (or any other applicable law or
regulation,  including  the  requirements  of the NASD or an  established  stock
exchange),  the Company shall obtain shareholder  approval of any Plan amendment
in such a manner and to such a degree as required.

                  (b) Effect of Amendment or Termination.  Any such amendment or
termination  of the Plan  shall not  affect  Options  or Stock  Purchase  Rights
already  granted and such Options and Stock Purchase Rights shall remain in full
force and  effect as if this Plan had not been  amended  or  terminated,  unless
mutually agreed  otherwise  between the Optionee and the Board,  which agreement
must be in writing and signed by the Optionee and the Company.

         15.  Conditions  Upon  Issuance of Shares.  Shares  shall not be issued
pursuant  to the  exercise  of an  Option or Stock  Purchase  Right  unless  the
exercise of such Option or Stock Purchase Right and the issuance and delivery of
such Shares pursuant  thereto shall comply with all relevant  provisions of law,
including,  without  limitation,  the  Securities  Act of 1933, as amended,  the
Exchange  Act,  the  rules  and  regulations  promulgated  thereunder,  and  the
requirements of any stock exchange upon which the Shares may then be listed, and
shall be further subject to the approval of counsel for the Company with respect
to such compliance.

                  As a condition to the exercise of an Option or Stock  Purchase
Right,  the  Company  may  require  the person  exercising  such Option or Stock
Purchase  Right to represent  and warrant at the time of any such  exercise that
the Shares are being  purchased  only for  investment  and  without  any present
intention  to sell or  distribute  such Shares if, in the opinion of counsel for
the  Company,  such a  representation  is required by any of the  aforementioned
relevant provisions of law.



                                      -10-





         16. Reservation of Shares.  The Company,  during the term of this Plan,
will at all times reserve and keep  available  such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

                  The  inability  of the  Company to obtain  authority  from any
regulatory body having jurisdiction,  which authority is deemed by the Company's
counsel to be necessary to the lawful issuance and sale of any Shares hereunder,
shall relieve the Company of any liability in respect of the failure to issue or
sell  such  Shares  as to which  such  requisite  authority  shall not have been
obtained.

         17. Agreements. Options and Stock Purchase Rights shall be evidenced by
written agreements in such form as the Board shall approve from time to time.

         18. Shareholder  Approval.  Continuance of the Plan shall be subject to
approval by the  shareholders of the Company within twelve (12) months before or
after the date the Plan is adopted.  Such shareholder approval shall be obtained
in the degree and manner required under applicable state and federal law and the
rules of any stock exchange upon which the Common Stock is listed.

         19. Information to Optionees and Purchasers.  The Company shall provide
to each  Optionee and to each  individual  who acquired  Shares  pursuant to the
Plan,  during the period such  Optionee or purchaser  has one or more Options or
Stock  Purchase  Rights  outstanding,  and,  in the  case of an  individual  who
acquired  Shares  pursuant to the Plan,  during the period such  individual owns
such Shares,  copies of all annual  reports and other  information.  The Company
shall not be required to provide such  information to key employees whose duties
in connection with the Company assure their access to equivalent information.



                                      -11-







                               JENNER TECHNOLOGIES

                                 1997 STOCK PLAN



        1.     Purposes of the Plan.  The purposes of this Plan are:

               o        to attract and retain the best  available  personnel for
                        positions of substantial responsibility,

               o        to provide additional incentive to Employees,  Directors
                        and Consultants, and

               o        to promote the success of the Company's business.

        Options  granted  under  the  Plan may be  Incentive  Stock  Options  or
Nonstatutory  Stock Options,  as determined by the  Administrator at the time of
grant. Stock Purchase Rights may also be granted under the Plan.

        2.   Definitions. As used herein, the following definitions shall apply:

               (a)  "Administrator"  means the Board or any of its Committees as
shall be administering the Plan, in accordance with Section 4 of the Plan.

               (b)  "Applicable  Laws"  means the  requirements  relating to the
administration  of stock option  plans under U. S. state  corporate  laws,  U.S.
federal and state  securities  laws,  the Code,  any stock exchange or quotation
system on which the Common Stock is listed or quoted and the applicable  laws of
any foreign country or jurisdiction  where Options or Stock Purchase Rights are,
or will be, granted under the Plan.

               (c) "Board" means the Board of Directors of the Company.

               (d) "Code" means the Internal Revenue Code of 1986, as amended.

               (e) "Committee"  means a committee of Directors  appointed by the
Board in accordance with Section 4 of the Plan.

               (f) "Common Stock" means the common stock of the Company.

               (g) "Company" means Jenner Technologies, a Delaware corporation.

               (h) "Consultant" means any person,  including an advisor, engaged
by the Company or a Parent or Subsidiary to render services to such entity.

               (i) "Director" means a member of the Board.
                                     





               (j) "Disability" means total and permanent  disability as defined
in Section 22(e)(3) of the Code.

               (k)  "Employee"   means  any  person,   including   Officers  and
Directors, employed by the Company or any Parent or Subsidiary of the Company. A
Service  Provider shall not cease to be an Employee in the case of (i) any leave
of absence  approved by the Company or (ii) transfers  between  locations of the
Company or between the Company,  its Parent,  any Subsidiary,  or any successor.
For purposes of Incentive  Stock Options,  no such leave may exceed ninety days,
unless  reemployment  upon  expiration of such leave is guaranteed by statute or
contract.  If reemployment upon expiration of a leave of absence approved by the
Company is not so guaranteed, on the 181st day of such leave any Incentive Stock
Option  held by the  Optionee  shall cease to be treated as an  Incentive  Stock
Option and shall be treated for tax  purposes as a  Nonstatutory  Stock  Option.
Neither  service as a Director  nor payment of a  director's  fee by the Company
shall be sufficient to constitute "employment" by the Company.

               (l) "Exchange Act" means the Securities  Exchange Act of 1934, as
amended.

               (m) "Fair  Market  Value"  means,  as of any  date,  the value of
Common Stock determined as follows:

                       (i) If the  Common  Stock is  listed  on any  established
stock exchange or a national  market system,  including  without  limitation the
Nasdaq National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market,
its Fair Market  Value  shall be the closing  sales price for such stock (or the
closing bid, if no sales were reported) as quoted on such exchange or system for
the last market trading day prior to the time of  determination,  as reported in
The  Wall  Street  Journal  or such  other  source  as the  Administrator  deems
reliable;

                       (ii)  If  the  Common  Stock  is  regularly  quoted  by a
recognized  securities  dealer but  selling  prices are not  reported,  the Fair
Market  Value of a Share of Common  Stock shall be the mean between the high bid
and low asked prices for the Common  Stock on the last market  trading day prior
to the day of  determination,  as reported  in The Wall  Street  Journal or such
other source as the Administrator deems reliable; or

                       (iii) In the  absence  of an  established  market for the
Common  Stock,  the Fair Market Value shall be  determined  in good faith by the
Administrator.

               (n) "Incentive  Stock Option" means an Option intended to qualify
as an incentive  stock option  within the meaning of Section 422 of the Code and
the regulations promulgated thereunder.

               (o)  "Nonstatutory  Stock Option" means an Option not intended to
qualify as an Incentive Stock Option.



                                       -2-




               (p)  "Notice  of Grant"  means a  written  or  electronic  notice
evidencing  certain  terms  and  conditions  of an  individual  Option  or Stock
Purchase Right grant. The Notice of Grant is part of the Option Agreement.

               (q)  "Officer"  means a person who is an  officer of the  Company
within  the  meaning  of  Section  16 of the  Exchange  Act  and the  rules  and
regulations promulgated thereunder.

               (r) "Option" means a stock option granted pursuant to the Plan.

               (s) "Option Agreement" means an agreement between the Company and
an Optionee  evidencing the terms and conditions of an individual  Option grant.
The Option Agreement is subject to the terms and conditions of the Plan.

               (t) "Option Exchange Program" means a program whereby outstanding
Options are surrendered in exchange for Options with a lower exercise price.

               (u) "Optioned  Stock" means the Common Stock subject to an Option
or Stock Purchase Right.

               (v) "Optionee" means the holder of an outstanding Option or Stock
Purchase Right granted under the Plan.

               (w)  "Parent"  means  a  "parent  corporation,"  whether  now  or
hereafter existing, as defined in Section 424(e) of the Code.

               (x) "Plan" means this 1997 Stock Plan.

               (y)  "Restricted  Stock" means  shares of Common  Stock  acquired
pursuant to a grant of Stock Purchase Rights under Section 11 of the Plan.

               (z)  "Restricted  Stock  Purchase   Agreement"  means  a  written
agreement  between  the  Company  and the  Optionee  evidencing  the  terms  and
restrictions  applying to stock  purchased  under a Stock  Purchase  Right.  The
Restricted  Stock  Purchase  Agreement is subject to the terms and conditions of
the Plan and the Notice of Grant.

               (aa) "Rule  16b-3"  means Rule 16b-3 of the  Exchange  Act or any
successor to Rule 16b-3,  as in effect when  discretion is being  exercised with
respect to the Plan.

               (bb) "Section 16(b)" means Section 16(b) of the Exchange Act.

               (cc)   "Service   Provider"   means  an  Employee,   Director  or
Consultant.



                                       -3-




               (dd) "Share"  means a share of the Common  Stock,  as adjusted in
accordance with Section 13 of the Plan.

               (ee) "Stock  Purchase  Right" means the right to purchase  Common
Stock pursuant to Section 11 of the Plan, as evidenced by a Notice of Grant.

               (ff) "Subsidiary" means a "subsidiary  corporation",  whether now
or hereafter existing, as defined in Section 424(f) of the Code.

        3. Stock Subject to the Plan. Subject to the provisions of Section 13 of
the Plan, the maximum  aggregate number of Shares which may be optioned and sold
under the Plan is 350,00 (post-split) Shares. The Shares may be authorized,  but
unissued, or reacquired Common Stock.

               If  an  Option  or  Stock   Purchase  Right  expires  or  becomes
unexercisable  without having been exercised in full, or is surrendered pursuant
to an Option Exchange Program, the unpurchased Shares which were subject thereto
shall become  available for future grant or sale under the Plan (unless the Plan
has terminated);  provided,  however, that Shares that have actually been issued
under the  Plan,  whether  upon  exercise  of an  Option or Right,  shall not be
returned  to the Plan and shall not become  available  for  future  distribution
under the Plan, except that if Shares of Restricted Stock are repurchased by the
Company at their original purchase price, such Shares shall become available for
future grant under the Plan.

        4. Administration of the Plan.

               (a) Procedure.

                       (i)  Multiple  Administrative  Bodies.  The  Plan  may be
administered by different Committees with respect to different groups of Service
Providers.

                       (ii) Section 162(m). To the extent that the Administrator
determines  it  to  be  desirable  to  qualify  Options  granted   hereunder  as
"performance-based  compensation"  within the  meaning of Section  162(m) of the
Code,  the Plan shall be  administered  by a Committee  of two or more  "outside
directors" within the meaning of Section 162(m) of the Code.

                       (iii)  Rule  16b-3.  To the extent  desirable  to qualify
transactions hereunder as exempt under Rule 16b-3, the transactions contemplated
hereunder  shall be structured to satisfy the  requirements  for exemption under
Rule 16b-3.

                       (iv) Other Administration.  Other than as provided above,
the Plan  shall be  administered  by (A) the  Board  or (B) a  Committee,  which
committee shall be constituted to satisfy Applicable Laws.



                                       -4-




               (b) Powers of the Administrator. Subject to the provisions of the
Plan, and in the case of a Committee,  subject to the specific duties  delegated
by the Board to such Committee,  the Administrator shall have the authority,  in
its discretion:

                       (i) to determine the Fair Market Value;

                       (ii) to select the Service  Providers to whom Options and
Stock Purchase Rights may be granted hereunder;

                       (iii) to  determine  the number of shares of Common Stock
to be covered by each Option and Stock Purchase Right granted hereunder;

                       (iv) to approve forms of agreement for use under thePlan;

                       (v)  to   determine   the  terms  and   conditions,   not
inconsistent  with the terms of the Plan, of any Option or Stock  Purchase Right
granted hereunder.  Such terms and conditions  include,  but are not limited to,
the exercise price,  the time or times when Options or Stock Purchase Rights may
be  exercised  (which  may  be  based  on  performance  criteria),  any  vesting
acceleration  or waiver  of  forfeiture  restrictions,  and any  restriction  or
limitation  regarding any Option or Stock Purchase Right of the shares of Common
Stock relating thereto, based in each case on such factors as the Administrator,
in its sole discretion, shall determine;

                       (vi) to reduce the exercise  price of any Option or Stock
Purchase Right to the then current Fair Market Value if the Fair Market Value of
the Common  Stock  covered by such  Option or Stock  Purchase  Right  shall have
declined since the date the Option or Stock Purchase Right was granted;

                       (vii) to institute an Option Exchange Program;

                       (viii) to construe  and  interpret  the terms of the Plan
and awards granted pursuant to the Plan;

                       (ix)  to   prescribe,   amend  and   rescind   rules  and
regulations  relating to the Plan,  including rules and regulations  relating to
sub-plans  established for the purpose of qualifying for preferred tax treatment
under foreign tax laws;

                       (x) to modify  or amend  each  Option  or Stock  Purchase
Right  (subject  to Section  15(c) of the  Plan),  including  the  discretionary
authority to extend the post-termination exercisability period of Options longer
than is otherwise provided for in the Plan;

                       (xi)  to  allow  Optionees  to  satisfy  withholding  tax
obligations  by  electing  to have the  Company  withhold  from the Shares to be
issued upon exercise of an Option or Stock  Purchase Right that number of Shares
having a Fair Market Value equal to the amount required to be withheld.


                                       -5-






The Fair Market Value of the Shares to be withheld  shall be  determined  on the
date that the amount of tax to be withheld is to be determined. All elections by
an Optionee to have Shares  withheld for this purpose shall be made in such form
and under such conditions as the Administrator may deem necessary or advisable;

                       (xii) to authorize any person to execute on behalf of the
Company  any  instrument  required  to  effect  the  grant of an Option or Stock
Purchase Right previously granted by the Administrator;

                       (xiii) to make all other determinations  deemed necessary
or advisable for administering the Plan.

               (c)  Effect  of  Administrator's  Decision.  The  Administrator's
decisions,  determinations and interpretations shall be final and binding on all
Optionees and any other holders of Options or Stock Purchase Rights.

        5. Eligibility. Nonstatutory Stock Options and Stock Purchase Rights may
be granted to Service Providers.  Incentive Stock Options may be granted only to
Employees.

        6. Limitations.

               (a) Each Option shall be  designated  in the Option  Agreement as
either an  Incentive  Stock  Option or a  Nonstatutory  Stock  Option.  However,
notwithstanding  such designation,  to the extent that the aggregate Fair Market
Value  of  the  Shares  with  respect  to  which  Incentive  Stock  Options  are
exercisable  for the first time by the Optionee  during any calendar year (under
all plans of the Company and any Parent or Subsidiary)  exceeds  $100,000,  such
Options shall be treated as  Nonstatutory  Stock  Options.  For purposes of this
Section 6(a),  Incentive  Stock Options shall be taken into account in the order
in which  they  were  granted.  The Fair  Market  Value of the  Shares  shall be
determined as of the time the Option with respect to such Shares is granted.

               (b) Neither the Plan nor any Option or Stock Purchase Right shall
confer upon an Optionee  any right with  respect to  continuing  the  Optionee's
relationship as a Service Provider with the Company, nor shall they interfere in
any way with the  Optionee's  right or the  Company's  right to  terminate  such
relationship at any time, with or without cause.

               (c) The following limitations shall  apply to  grants of Options:

                       (i) No Service  Provider shall be granted,  in any fiscal
year of the Company, Options to purchase more than [ ] Shares.

                       (ii) In  connection  with his or her initial  service,  a
Service  Provider  may be granted  Options to purchase up to an  additional  [ ]
Shares  which  shall not count  against  the limit set forth in  subsection  (i)
above.


                                       -6-




                       (iii)  The  foregoing   limitations   shall  be  adjusted
proportionately in connection with any change in the Company's capitalization as
described in Section 13.

                       (iv) If an Option is cancelled in the same fiscal year of
the Company in which it was granted (other than in connection with a transaction
described  in Section  13),  the  cancelled  Option will be counted  against the
limits set forth in  subsections  (i) and (ii) above.  For this purpose,  if the
exercise  price of an Option is reduced,  the  transaction  will be treated as a
cancellation of the Option and the grant of a new Option.

        7. Term of Plan.  Subject  to  Section  19 of the Plan,  the Plan  shall
become effective upon its adoption by the Board. It shall continue in effect for
a term of ten (10) years unless terminated earlier under Section 15 of the Plan.

        8. Term of Option. The term of each Option shall be stated in the Option
Agreement.  In the case of an Incentive Stock Option, the term shall be ten (10)
years  from the date of grant or such  shorter  term as may be  provided  in the
Option Agreement.  Moreover, in the case of an Incentive Stock Option granted to
an Optionee who, at the time the Incentive  Stock Option is granted,  owns stock
representing  more than ten percent (10%) of the total combined  voting power of
all classes of stock of the Company or any Parent or Subsidiary, the term of the
Incentive  Stock  Option  shall be five (5) years from the date of grant or such
shorter term as may be provided in the Option Agreement.

        9. Option Exercise Price and Consideration.

               (a) Exercise  Price.  The per share exercise price for the Shares
to be issued  pursuant  to  exercise  of an Option  shall be  determined  by the
Administrator, subject to the following:

                       (i) In the case of an Incentive Stock Option

                              (A)  granted to an  Employee  who, at the time the
Incentive Stock Option is granted, owns stock representing more than ten percent
(10%) of the voting  power of all  classes of stock of the Company or any Parent
or  Subsidiary,  the per Share  exercise price shall be no less than 110% of the
Fair Market Value per Share on the date of grant.

                              (B) granted to any Employee other than an Employee
described in paragraph (A) immediately above, the per Share exercise price shall
be no less than 100% of the Fair Market Value per Share on the date of grant.

                       (ii) In the case of a Nonstatutory  Stock Option, the per
Share exercise price shall be determined by the Administrator.  In the case of a
Nonstatutory   Stock   Option   intended   to  qualify   as   "performance-based
compensation"  within the meaning of Section  162(m) of the Code,  the per Share
exercise  price shall be no less than 100% of the Fair Market Value per Share on
the date of grant.


                                       -7-



                       (iii)  Notwithstanding  the  foregoing,  Options  may  be
granted  with a per Share  exercise  price of less than 100% of the Fair  Market
Value per  Share on the date of grant  pursuant  to a merger or other  corporate
transaction.

               (b) Waiting Period and Exercise  Dates.  At the time an Option is
granted,  the Administrator  shall fix the period within which the Option may be
exercised and shall determine any conditions  which must be satisfied before the
Option may be exercised.

               (c) Form of Consideration.  The Administrator shall determine the
acceptable form of consideration for exercising an Option,  including the method
of payment.  In the case of an Incentive Stock Option,  the Administrator  shall
determine  the  acceptable  form of  consideration  at the time of  grant.  Such
consideration may consist entirely of:

                       (i) cash;

                       (ii) check;

                       (iii) promissory note;

                       (iv)  other  Shares  which  (A) in  the  case  of  Shares
acquired  upon  exercise of an option,  have been owned by the Optionee for more
than six months on the date of  surrender,  and (B) have a Fair Market  Value on
the date of surrender equal to the aggregate  exercise price of the Shares as to
which said Option shall be exercised;

                       (v)  consideration   received  by  the  Company  under  a
cashless  exercise  program  implemented  by the Company in connection  with the
Plan;

                       (vi) a reduction  in the amount of any Company  liability
to  the  Optionee,  including  any  liability  attributable  to  the  Optionee's
participation  in  any   Company-sponsored   deferred  compensation  program  or
arrangement;

                       (vii)  any  combination  of  the  foregoing   methods  of
payment; or

                       (viii) such other consideration and method of payment for
the issuance of Shares to the extent permitted by Applicable Laws.

        10. Exercise of Option.

               (a) Procedure for Exercise;  Rights as a Shareholder.  Any Option
granted hereunder shall be exercisable according to the terms of the Plan and at
such times and under such conditions as determined by the  Administrator and set
forth in the Option  Agreement.  Unless the  Administrator  provides  otherwise,
vesting of Options granted  hereunder shall be tolled during any unpaid leave of
absence. An Option may not be exercised for a fraction of a Share.


                                       -8-




                       An Option  shall be  deemed  exercised  when the  Company
receives:  (i) written or electronic  notice of exercise (in accordance with the
Option Agreement) from the person entitled to exercise the Option, and (ii) full
payment  for the Shares  with  respect to which the  Option is  exercised.  Full
payment may consist of any consideration and method of payment authorized by the
Administrator  and permitted by the Option Agreement and the Plan. Shares issued
upon  exercise of an Option  shall be issued in the name of the  Optionee or, if
requested  by the  Optionee,  in the name of the Optionee and his or her spouse.
Until the Shares are issued (as evidenced by the appropriate  entry on the books
of the Company or of a duly authorized transfer agent of the Company),  no right
to vote or receive  dividends or any other rights as a  shareholder  shall exist
with respect to the Optioned Stock,  notwithstanding the exercise of the Option.
The Company shall issue (or cause to be issued) such Shares  promptly  after the
Option is exercised.  No  adjustment  will be made for a dividend or other right
for which the record date is prior to the date the Shares are issued,  except as
provided in Section 13 of the Plan.

                       Exercising  an Option in any manner  shall  decrease  the
number of Shares  thereafter  available,  both for  purposes of the Plan and for
sale  under the  Option,  by the  number  of  Shares  as to which the  Option is
exercised.

               (b)  Termination of  Relationship  as a Service  Provider.  If an
Optionee ceases to be a Service  Provider,  other than upon the Optionee's death
or Disability, the Optionee may exercise his or her Option within such period of
time as is  specified  in the Option  Agreement to the extent that the Option is
vested on the date of termination  (but in no event later than the expiration of
the term of such Option as set forth in the Option Agreement). In the absence of
a specified time in the Option  Agreement,  the Option shall remain  exercisable
for three (3) months  following the Optionee's  termination.  If, on the date of
termination,  the  Optionee  is not vested as to his or her entire  Option,  the
Shares  covered by the unvested  portion of the Option shall revert to the Plan.
If, after  termination,  the Optionee does not exercise his or her Option within
the time specified by the  Administrator,  the Option shall  terminate,  and the
Shares covered by such Option shall revert to the Plan.

               (c) Disability of Optionee. If an Optionee ceases to be a Service
Provider as a result of the Optionee's Disability, the Optionee may exercise his
or her Option within such period of time as is specified in the Option Agreement
to the extent the Option is vested on the date of  termination  (but in no event
later than the  expiration of the term of such Option as set forth in the Option
Agreement).  In the absence of a  specified  time in the Option  Agreement,  the
Option shall remain  exercisable for twelve (12) months following the Optionee's
termination.  If, on the date of  termination,  the Optionee is not vested as to
his or her entire  Option,  the Shares  covered by the  unvested  portion of the
Option shall revert to the Plan.  If, after  termination,  the Optionee does not
exercise his or her Option within the time  specified  herein,  the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

               (d)  Death of  Optionee.  If an  Optionee  dies  while a  Service
Provider, the Option may be exercised within such period of time as is specified
in the Option Agreement (but in no event later


                                       -9-




than the  expiration  of the term of such  Option as set forth in the  Notice of
Grant),  by the  Optionee's  estate  or by a person  who  acquires  the right to
exercise the Option by bequest or  inheritance,  but only to the extent that the
Option is vested on the date of death. In the absence of a specified time in the
Option  Agreement,  the Option shall remain  exercisable  for twelve (12) months
following the Optionee's termination.  If, at the time of death, the Optionee is
not vested as to his or her entire  Option,  the Shares  covered by the unvested
portion of the Option shall  immediately  revert to the Plan.  The Option may be
exercised by the executor or administrator of the Optionee's estate or, if none,
by the person(s)  entitled to exercise the Option under the  Optionee's  will or
the laws of descent or  distribution.  If the Option is not so exercised  within
the time specified herein, the Option shall terminate, and the Shares covered by
such Option shall revert to the Plan.

               (e) Buyout Provisions. The Administrator may at any time offer to
buy out for a payment in cash or Shares an Option  previously  granted  based on
such terms and conditions as the  Administrator  shall establish and communicate
to the Optionee at the time that such offer is made.

        11.  Stock Purchase Rights.

               (a)  Rights to  Purchase.  Stock  Purchase  Rights  may be issued
either alone,  in addition to, or in tandem with other awards  granted under the
Plan  and/or  cash  awards  made  outside of the Plan.  After the  Administrator
determines  that it will offer Stock  Purchase  Rights under the Plan,  it shall
advise the offeree in writing or electronically,  by means of a Notice of Grant,
of the terms,  conditions and restrictions  related to the offer,  including the
number of Shares that the offeree shall be entitled to purchase, the price to be
paid,  and the time within which the offeree  must accept such offer.  The offer
shall be accepted by execution of a Restricted  Stock Purchase  Agreement in the
form determined by the Administrator.

               (b)  Repurchase  Option.  Unless  the  Administrator   determines
otherwise,  the Restricted  Stock Purchase  Agreement  shall grant the Company a
repurchase option  exercisable upon the voluntary or involuntary  termination of
the  purchaser's  service  with the Company for any reason  (including  death or
Disability).   The  purchase  price  for  Shares  repurchased  pursuant  to  the
Restricted  Stock  Purchase  Agreement  shall be the original  price paid by the
purchaser and may be paid by cancellation  of any  indebtedness of the purchaser
to the Company.  The repurchase  option shall lapse at a rate  determined by the
Administrator.

               (c) Other  Provisions.  The Restricted  Stock Purchase  Agreement
shall contain such other terms,  provisions and conditions not inconsistent with
the Plan as may be determined by the Administrator in its sole discretion.

               (d) Rights as a  Shareholder.  Once the Stock  Purchase  Right is
exercised,  the  purchaser  shall  have  the  rights  equivalent  to  those of a
shareholder, and shall be a shareholder when his or her purchase is entered upon
the records of the duly authorized  transfer agent of the Company. No adjustment
will be made for a dividend or other right for which the record date is prior to
the date the Stock Purchase Right is exercised, except as provided in Section 13
of the Plan.


                                      -10-




        12.  Non-Transferability  of Options and Stock Purchase  Rights.  Unless
determined otherwise by the Administrator, an Option or Stock Purchase Right may
not be sold, pledged, assigned, hypothecated, transferred, or disposed of in any
manner other than by will or by the laws of descent or  distribution  and may be
exercised,  during the lifetime of the Optionee,  only by the  Optionee.  If the
Administrator makes an Option or Stock Purchase Right transferable,  such Option
or Stock  Purchase Right shall contain such  additional  terms and conditions as
the Administrator deems appropriate.

        13. Adjustments Upon Changes in Capitalization,  Dissolution,  Merger or
Asset Sale.

               (a) Changes in Capitalization.  Subject to any required action by
the shareholders of the Company, the number of shares of Common Stock covered by
each  outstanding  Option and Stock Purchase Right,  and the number of shares of
Common Stock which have been  authorized  for issuance  under the Plan but as to
which no Options or Stock  Purchase  Rights have yet been  granted or which have
been returned to the Plan upon  cancellation or expiration of an Option or Stock
Purchase  Right,  as well as the price per share of Common Stock covered by each
such  outstanding  Option  or Stock  Purchase  Right,  shall be  proportionately
adjusted for any  increase or decrease in the number of issued  shares of Common
Stock  resulting  from a stock  split,  reverse  stock  split,  stock  dividend,
combination or  reclassification  of the Common Stock,  or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of  consideration  by the Company;  provided,  however,  that  conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of  consideration."  Such adjustment shall be made by the Board,
whose  determination  in that respect  shall be final,  binding and  conclusive.
Except as  expressly  provided  herein,  no issuance by the Company of shares of
stock of any class, or securities convertible into shares of stock of any class,
shall affect, and no adjustment by reason thereof shall be made with respect to,
the  number or price of shares of  Common  Stock  subject  to an Option or Stock
Purchase Right.

               (b)  Dissolution  or  Liquidation.  In the event of the  proposed
dissolution or liquidation of the Company,  the Administrator  shall notify each
Optionee as soon as  practicable  prior to the  effective  date of such proposed
transaction.  The Administrator in its discretion may provide for an Optionee to
have the right to exercise  his or her Option  until ten (10) days prior to such
transaction as to all of the Optioned Stock covered thereby, including Shares as
to which the  Option  would not  otherwise  be  exercisable.  In  addition,  the
Administrator  may provide that any Company  repurchase option applicable to any
Shares  purchased upon exercise of an Option or Stock Purchase Right shall lapse
as to all such Shares,  provided the proposed  dissolution or liquidation  takes
place at the time and in the manner contemplated.  To the extent it has not been
previously  exercised,   an  Option  or  Stock  Purchase  Right  will  terminate
immediately prior to the consummation of such proposed action.

               (c) Merger or Asset Sale. In the event of a merger of the Company
with or into another corporation, or the sale of substantially all of the assets
of the  Company,  each  outstanding  Option and Stock  Purchase  Right  shall be
assumed  or  an  equivalent   option  or  right  substituted  by  the  successor
corporation or a Parent or Subsidiary of the successor corporation. In the event
that the successor corporation refuses to assume or substitute for the Option or
Stock Purchase Right, the


                                      -11-




Optionee  shall fully vest in and have the right to exercise the Option or Stock
Purchase Right as to all of the Optioned Stock,  including Shares as to which it
would not  otherwise be vested or  exercisable.  If an Option or Stock  Purchase
Right becomes fully vested and exercisable in lieu of assumption or substitution
in the event of a merger or sale of assets,  the Administrator  shall notify the
Optionee in writing or  electronically  that the Option or Stock  Purchase Right
shall be fully vested and exercisable for a period of fifteen (15) days from the
date of such notice, and the Option or Stock Purchase Right shall terminate upon
the expiration of such period. For the purposes of this paragraph, the Option or
Stock  Purchase  Right shall be considered  assumed if,  following the merger or
sale of assets,  the option or right  confers  the right to purchase or receive,
for each Share of Optioned  Stock subject to the Option or Stock  Purchase Right
immediately prior to the merger or sale of assets,  the  consideration  (whether
stock,  cash, or other securities or property) received in the merger or sale of
assets by holders of Common Stock for each Share held on the  effective  date of
the transaction (and if holders were offered a choice of consideration, the type
of consideration chosen by the holders of a majority of the outstanding Shares);
provided,  however, that if such consideration received in the merger or sale of
assets is not solely  common stock of the successor  corporation  or its Parent,
the Administrator  may, with the consent of the successor  corporation,  provide
for the  consideration  to be received  upon the exercise of the Option or Stock
Purchase Right,  for each Share of Optioned Stock subject to the Option or Stock
Purchase  Right,  to be solely common stock of the successor  corporation or its
Parent  equal in fair market  value to the per share  consideration  received by
holders of Common Stock in the merger or sale of assets.

        14.  Date of Grant.  The date of grant of an  Option  or Stock  Purchase
Right shall be, for all purposes,  the date on which the Administrator makes the
determination  granting such Option or Stock Purchase Right, or such other later
date as is determined by the Administrator. Notice of the determination shall be
provided to each Optionee within a reasonable time after the date of such grant.

        15. Amendment and Termination of the Plan.

               (a) Amendment and  Termination.  The Board may at any time amend,
alter, suspend or terminate the Plan.

               (b) Shareholder  Approval.  The Company shall obtain  shareholder
approval of any Plan  amendment to the extent  necessary and desirable to comply
with Applicable Laws.

               (c) Effect of Amendment or Termination. No amendment, alteration,
suspension or  termination  of the Plan shall impair the rights of any Optionee,
unless mutually  agreed  otherwise  between the Optionee and the  Administrator,
which  agreement  must be in writing and signed by the Optionee and the Company.
Termination of the Plan shall not affect the Administrator's ability to exercise
the powers  granted to it hereunder  with respect to Options  granted  under the
Plan prior to the date of such termination.


                                      -12-



        16. Conditions Upon Issuance of Shares.

               (a) Legal Compliance.  Shares shall not be issued pursuant to the
exercise of an Option or Stock Purchase Right unless the exercise of such Option
or Stock  Purchase  Right and the  issuance  and  delivery of such Shares  shall
comply  with  Applicable  Laws and shall be further  subject to the  approval of
counsel for the Company with respect to such compliance.

               (b) Investment Representations. As a condition to the exercise of
an Option or Stock Purchase Right, the Company may require the person exercising
such Option or Stock  Purchase Right to represent and warrant at the time of any
such  exercise  that the  Shares are being  purchased  only for  investment  and
without  any  present  intention  to sell or  distribute  such Shares if, in the
opinion of counsel for the Company, such a representation is required.

        17.  Inability  to Obtain  Authority.  The  inability  of the Company to
obtain authority from any regulatory body having  jurisdiction,  which authority
is deemed by the  Company's  counsel to be necessary to the lawful  issuance and
sale of any Shares  hereunder,  shall  relieve the Company of any  liability  in
respect of the failure to issue or sell such  Shares as to which such  requisite
authority shall not have been obtained.

        18.  Reservation of Shares.  The Company,  during the term of this Plan,
will at all times reserve and keep  available  such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

        19. Shareholder  Approval.  The Plan shall be subject to approval by the
shareholders of the Company within twelve (12) months after the date the Plan is
adopted.  Such  shareholder  approval shall be obtained in the manner and to the
degree required under Applicable Laws.


                                      -13-



                               JENNER TECHNOLOGIES

                                 1997 STOCK PLAN

                             STOCK OPTION AGREEMENT


        Unless  otherwise  defined  herein,  the terms defined in the Plan shall
have the same defined meanings in this Option Agreement.

I.  NOTICE OF STOCK OPTION GRANT
- --------------------------------

[Optionee's Name and Address]

        You have been granted an option to purchase Common Stock of the Company,
subject to the terms and  conditions of the Plan and this Option  Agreement,  as
follows:

        Grant Number                            ___________________________

        Date of Grant                           ___________________________

        Vesting Commencement Date               ___________________________

        Exercise Price per Share                $__________________________

        Total Number of Shares Granted          ___________________________

        Total Exercise Price                    $__________________________

        Type of Option:                         ____Incentive Stock Option

                                                ____Nonstatutory Stock Option

        Term/Expiration Date:                   ___________________________


     Vesting Schedule:

        This Option may be exercised,  in whole or in part,  in accordance  with
the  following  schedule  subject  to the  Optionee  continuing  to be a Service
Provider on such dates:

               One thirty-sixth (1/36) of the Shares subject to the Option shall
vest and be exercisable on   , and an additional one  thirty-sixth (1/36) of the
total number of Shares  subject to the Option shall vest and be  exercisable  at
the end of each full  month  thereafter,  until all such  Shares  are vested and
exercisable.

                                      




        Termination Period:

        This Option may be exercised for three months after  Optionee  ceases to
be a Service Provider. Upon the death or Disability of the Optionee, this Option
may be  exercised  for such longer  period as provided in the Plan.  In no event
shall this Option be exercised later than the  Term/Expiration  Date as provided
above.

II.  AGREEMENT
- --------------

        1. Grant of Option.  The Plan Administrator of the Company hereby grants
to the  Optionee  named  in the  Notice  of  Grant  attached  as  Part I of this
Agreement  (the  "Optionee")  an option (the "Option") to purchase the number of
Shares, as set forth in the Notice of Grant, at the exercise price per share set
forth in the Notice of Grant (the  "Exercise  Price"),  subject to the terms and
conditions of the Plan,  which is incorporated  herein by reference.  Subject to
Section  15(c) of the Plan,  in the event of a  conflict  between  the terms and
conditions of the Plan and the terms and  conditions  of this Option  Agreement,
the terms and conditions of the Plan shall prevail.

               If designated in the Notice of Grant as an Incentive Stock Option
("ISO"),  this Option is intended to qualify as an Incentive  Stock Option under
Section 422 of the Code.  However, if this Option is intended to be an Incentive
Stock  Option,  to the extent that it exceeds the $100,000  rule of Code Section
422(d) it shall be treated as a Nonstatutory Stock Option ("NSO").

        2. Exercise of Option.

               (a) Right to Exercise. This Option is exercisable during its term
in accordance  with the Vesting  Schedule set out in the Notice of Grant and the
applicable provisions of the Plan and this Option Agreement.

               (b) Method of Exercise. This Option is exercisable by delivery of
an exercise notice,  in the form attached as Exhibit A (the "Exercise  Notice"),
which shall state the election to exercise  the Option,  the number of Shares in
respect of which the Option is being  exercised (the  "Exercised  Shares"),  and
such other  representations  and  agreements  as may be  required by the Company
pursuant to the provisions of the Plan.  The Exercise  Notice shall be completed
by the Optionee and delivered to Secretary of the Company.  The Exercise  Notice
shall be  accompanied  by  payment  of the  aggregate  Exercise  Price as to all
Exercised  Shares.  This Option shall be deemed to be exercised  upon receipt by
the Company of such fully executed Exercise Notice accompanied by such aggregate
Exercise Price.

               No Shares shall be issued pursuant to the exercise of this Option
unless such issuance and exercise  complies with Applicable Laws.  Assuming such
compliance,  for income tax purposes the  Exercised  Shares shall be  considered
transferred  to the Optionee on the date the Option is exercised with respect to
such Exercised Shares.


                                       -2-




        3. Method of Payment.  Payment of the aggregate  Exercise Price shall be
by any of the  following,  or a  combination  thereof,  at the  election  of the
Optionee:

               (a) cash;

               (b) check;

               (c)  surrender  of other  Shares  which (i) in the case of Shares
acquired  upon  exercise of an option,  have been owned by the Optionee for more
than six (6) months on the date of surrender,  AND (ii) have a Fair Market Value
on the date of surrender equal to the aggregate  Exercise Price of the Exercised
Shares; or

               (d) delivery of a properly executed exercise notice together with
such other  documentation as the  administrator  and the broker,  if applicable,
shall require to effect an exercise of the Option and delivery to the Company of
the sale or loan proceeds required to pay the exercise price.

        4.  Non-Transferability of Option. This Option may not be transferred in
any manner  otherwise than by will or by the laws of descent or distribution and
may be exercised during the lifetime of Optionee only by the Optionee. The terms
of the Plan and this  Option  Agreement  shall be  binding  upon the  executors,
administrators, heirs, successors and assigns of the Optionee.

        5. Term of Option. This Option may be exercised only within the term set
out in the  Notice  of  Grant,  and may be  exercised  during  such term only in
accordance with the Plan and the terms of this Option Agreement.

        6. Tax  Consequences.  Some of the federal tax consequences  relating to
this Option, as of the date of this Option, are set forth below. THIS SUMMARY IS
NECESSARILY INCOMPLETE,  AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE.
THE  OPTIONEE  SHOULD  CONSULT A TAX ADVISER  BEFORE  EXERCISING  THIS OPTION OR
DISPOSING OF THE SHARES.

               (a) Exercising the Option.

                       (i)  Nonstatutory  Stock  Option.  The Optionee may incur
regular  federal  income tax liability upon exercise of a NSO. The Optionee will
be treated as having  received  compensation  income (taxable at ordinary income
tax  rates)  equal  to the  excess,  if any,  of the  Fair  Market  Value of the
Exercised Shares on the date of exercise over their aggregate Exercise Price. If
the Optionee is an Employee or a former  Employee,  the Company will be required
to withhold from his or her compensation or collect from Optionee and pay to the
applicable  taxing  authorities  an amount in cash equal to a percentage of this
compensation  income  at the time of  exercise,  and may  refuse  to  honor  the
exercise  and  refuse to  deliver  Shares if such  withholding  amounts  are not
delivered at the time of exercise.


                                       -3-




                       (ii) Incentive Stock Option.  If this Option qualifies as
an ISO, the Optionee will have no regular  federal income tax liability upon its
exercise, although the excess, if any, of the Fair Market Value of the Exercised
Shares on the date of  exercise  over  their  aggregate  Exercise  Price will be
treated as an adjustment to alternative  minimum  taxable income for federal tax
purposes and may subject the Optionee to alternative  minimum tax in the year of
exercise.  In the event that the Optionee ceases to be an Employee but remains a
Service  Provider,  any  Incentive  Stock  Option of the  Optionee  that remains
unexercised  shall  cease to qualify as an  Incentive  Stock  Option and will be
treated for tax  purposes as a  Nonstatutory  Stock Option on the date three (3)
months and one (1) day following such change of status.

               (b) Disposition of Shares.

                       (i) NSO.  If the  Optionee  holds NSO Shares for at least
one year,  any gain  realized  on  disposition  of the Shares will be treated as
long-term capital gain for federal income tax purposes.

                       (ii) ISO. If the  Optionee  holds ISO Shares for at least
one year after exercise and two years after the grant date, any gain realized on
disposition of the Shares will be treated as long-term  capital gain for federal
income tax  purposes.  If the  Optionee  disposes of ISO Shares  within one year
after  exercise  or two years after the grant  date,  any gain  realized on such
disposition  will be treated as compensation  income (taxable at ordinary income
rates) to the extent of the excess,  if any, of the lesser of (A) the difference
between the Fair Market Value of the Shares acquired on the date of exercise and
the aggregate  Exercise Price,  or (B) the difference  between the sale price of
such Shares and the aggregate  Exercise Price. Any additional gain will be taxed
as capital gain,  short-term  or long-term  depending on the period that the ISO
Shares were held.

               (c) Notice of  Disqualifying  Disposition  of ISO Shares.  If the
Optionee sells or otherwise  disposes of any of the Shares acquired  pursuant to
an ISO on or before the later of (i) two years after the grant date, or (ii) one
year after the exercise date, the Optionee shall immediately  notify the Company
in  writing  of such  disposition.  The  Optionee  agrees  that he or she may be
subject to income tax  withholding  by the  Company on the  compensation  income
recognized  from such early  disposition of ISO Shares by payment in cash or out
of the current earnings paid to the Optionee.

        7. Entire Agreement;  Governing Law. The Plan is incorporated  herein by
reference. The Plan and this Option Agreement constitute the entire agreement of
the parties with  respect to the subject  matter  hereof and  supersede in their
entirety all prior  undertakings and agreements of the Company and Optionee with
respect to the subject matter hereof,  and may not be modified  adversely to the
Optionee's  interest  except by means of a writing  signed  by the  Company  and
Optionee.  This agreement is governed by the internal  substantive laws, but not
the choice of law rules, of California.

        8. NO GUARANTEE OF CONTINUED SERVICE.  OPTIONEE  ACKNOWLEDGES AND AGREES
THAT THE VESTING OF SHARES  PURSUANT TO THE  VESTING  SCHEDULE  HEREOF IS EARNED
ONLY BY CONTINUING AS A SERVICE PROVIDER AT


                                       -4-



THE WILL OF THE COMPANY (AND NOT THROUGH THE ACT OF BEING HIRED,  BEING  GRANTED
AN OPTION OR PURCHASING  SHARES  HEREUNDER).  OPTIONEE FURTHER  ACKNOWLEDGES AND
AGREES THAT THIS  AGREEMENT,  THE  TRANSACTIONS  CONTEMPLATED  HEREUNDER AND THE
VESTING  SCHEDULE  SET FORTH  HEREIN DO NOT  CONSTITUTE  AN  EXPRESS  OR IMPLIED
PROMISE OF CONTINUED  ENGAGEMENT AS A SERVICE  PROVIDER FOR THE VESTING  PERIOD,
FOR ANY PERIOD,  OR AT ALL, AND SHALL NOT INTERFERE WITH OPTIONEE'S RIGHT OR THE
COMPANY'S RIGHT TO TERMINATE  OPTIONEE'S  RELATIONSHIP AS A SERVICE  PROVIDER AT
ANY TIME, WITH OR WITHOUT CAUSE.

        By your  signature  and the  signature of the  Company's  representative
below,  you and the Company agree that this Option is granted under and governed
by the terms and conditions of the Plan and this Option Agreement.  Optionee has
reviewed  the Plan and  this  Option  Agreement  in their  entirety,  has had an
opportunity  to obtain the  advice of counsel  prior to  executing  this  Option
Agreement and fully understands all provisions of the Plan and Option Agreement.
Optionee hereby agrees to accept as binding,  conclusive and final all decisions
or  interpretations of the Administrator upon any questions relating to the Plan
and Option  Agreement.  Optionee  further  agrees to notify the Company upon any
change in the residence address indicated below.


OPTIONEE:                                        JENNER TECHNOLOGIES



- -----------------------------------              -------------------------------
Signature                                        By

- ------------------------------------             -------------------------------
Print Name                                       Title

- ------------------------------------
Residence Address

- ------------------------------------



                                       -5-




                                CONSENT OF SPOUSE
                                -----------------

        The  undersigned  spouse of Optionee  has read and hereby  approves  the
terms and conditions of the Plan and this Option Agreement.  In consideration of
the  Company's  granting  his or her spouse the right to purchase  Shares as set
forth in the Plan and this Option Agreement, the undersigned hereby agrees to be
irrevocably  bound by the  terms  and  conditions  of the  Plan and this  Option
Agreement  and further  agrees that any  community  property  interest  shall be
similarly bound.  The undersigned  hereby appoints the  undersigned's  spouse as
attorney-in-fact  for the undersigned  with respect to any amendment or exercise
of rights under the Plan or this Option Agreement.


                                         ---------------------------------------
                                         Spouse of Optionee



                                       -6-




                                    EXHIBIT A

                                 1997 STOCK PLAN

                                 EXERCISE NOTICE


Jenner Technologies
2010 Crow Canyon Place, Suite 100
San Ramon, CA 94583

Attention:  Chief Financial Officer

        1. Exercise of Option. Effective as of today,  ________________,  199__,
the undersigned  ("Purchaser") hereby elects to purchase  ______________  shares
(the "Shares") of the Common Stock of Jenner  Technologies (the "Company") under
and pursuant to the 1997 Stock Plan (the "Plan") and the Stock Option  Agreement
dated , 19___ (the "Option Agreement").  The purchase price for the Shares shall
be $ , as required by the Option Agreement.

        2. Delivery of Payment.  Purchaser  herewith delivers to the Company the
full purchase price for the Shares.

        3. Representations of Purchaser.  Purchaser  acknowledges that Purchaser
has received,  read and understood the Plan and the Option  Agreement and agrees
to abide by and be bound by their terms and conditions.

        4.  Rights as  Shareholder.  Until the  issuance  (as  evidenced  by the
appropriate  entry on the books of the Company or of a duly authorized  transfer
agent of the  Company) of the Shares,  no right to vote or receive  dividends or
any other  rights as a  shareholder  shall  exist with  respect to the  Optioned
Stock,  notwithstanding the exercise of the Option. The Shares so acquired shall
be issued to the Optionee as soon as  practicable  after exercise of the Option.
No  adjustment  will be made for a dividend  or other right for which the record
date is prior to the date of  issuance,  except as provided in Section 13 of the
Plan.

        5. Tax  Consultation.  Purchaser  understands  that Purchaser may suffer
adverse tax  consequences as a result of Purchaser's  purchase or disposition of
the Shares.  Purchaser  represents  that  Purchaser has  consulted  with any tax
consultants  Purchaser  deems  advisable  in  connection  with the  purchase  or
disposition  of the Shares and that  Purchaser is not relying on the Company for
any tax advice.

        6. Entire  Agreement;  Governing Law. The Plan and Option  Agreement are
incorporated  herein  by  reference.  This  Agreement,  the Plan and the  Option
Agreement  constitute  the entire  agreement  of the parties with respect to the
subject matter hereof and supersede in their entirety all prior undertakings and
agreements  of the  Company and  Purchaser  with  respect to the subject  matter
hereof, and may not be modified adversely to the Purchaser's  interest except by
means of a writing


                                                        




signed by the Company and Purchaser.  This agreement is governed by the internal
substantive laws, but not the choice of law rules, of California.


Submitted by:                                Accepted by:

PURCHASER:                                   JENNER TECHNOLOGIES


- ----------------------------------           -----------------------------------
Signature                                    By

- ----------------------------------           -----------------------------------
Print Name                                   Its


Address:                                     Address:

- ---------------------------------            Jenner Technologies
                                             2010 Crow Canyon Place, Suite 100
- ---------------------------------            San Ramon, CA 94583

                                             -----------------------------------
                                             Date Received


                                       -2-






                                    EXHIBIT B
                                    ---------

                               SECURITY AGREEMENT



        This Security  Agreement is made as of __________,  19___ between Jenner
Technologies, a Delaware corporation ("Pledgee"), and  _________________________
("Pledgor").


                                    Recitals

        Pursuant  to  Pledgor's  election to  purchase  Shares  under the Option
Agreement  dated  ________  (the  "Option"),  between  Pledgor and Pledgee under
Pledgee's 1997 Stock Plan, and Pledgor's  election under the terms of the Option
to pay for such  shares  with his  promissory  note (the  "Note"),  Pledgor  has
purchased  _________  shares of Pledgee's Common Stock (the "Shares") at a price
of $________ per share, for a total purchase price of $__________.  The Note and
the obligations thereunder are as set forth in Exhibit C to the Option.

        NOW, THEREFORE, it is agreed as follows:

        1. Creation and Description of Security  Interest.  In  consideration of
the  transfer  of the Shares to Pledgor  under the  Option  Agreement,  Pledgor,
pursuant to the California  Commercial  Code,  hereby pledges all of such Shares
(herein sometimes  referred to as the  "Collateral")  represented by certificate
number  ______,  duly  endorsed  in blank or with  executed  stock  powers,  and
herewith delivers said certificate to the Secretary of Pledgee ("Pledgeholder"),
who shall  hold said  certificate  subject to the terms and  conditions  of this
Security Agreement.

        The pledged stock (together with an executed blank stock  assignment for
use in  transferring  all or a portion of the Shares to Pledgee  if, as and when
required pursuant to this Security  Agreement) shall be held by the Pledgeholder
as  security  for the  repayment  of the Note,  and any  extensions  or renewals
thereof,  to be executed by Pledgor pursuant to the terms of the Option, and the
Pledge  holder shall not encumber or dispose of such Shares except in accordance
with the provisions of this Security Agreement.

        2. Pledgor's  Representations and Covenants.  To induce Pledgee to enter
into this Security Agreement,  Pledgor represents and covenants to Pledgee,  its
successors and assigns, as follows:

               a. Payment of Indebtedness. Pledgor will pay the principal sum of
the Note secured hereby,  together with interest thereon, at the time and in the
manner provided in the Note.

               b. Encumbrances.  The Shares are free of all other  encumbrances,
defenses and liens, and Pledgor will not further encumber the Shares without the
prior written consent of Pledgee.

               c. Margin  Regulations.  In the event that Pledgee's Common Stock
is now or later becomes  margin-listed  by the Federal Reserve Board and Pledgee
is classified as a "lender" within the


                                       




meaning  of the  regulations  under  Part 207 of Title 12 of the Code of Federal
Regulations ("Regulation G"), Pledgor agrees to cooperate with Pledgee in making
any  amendments  to the Note or providing  any  additional  collateral as may be
necessary to comply with such regulations.

        3.  Voting  Rights.  During  the term of this  pledge and so long as all
payments of  principal  and interest are made as they become due under the terms
of the Note,  Pledgor  shall  have the right to vote all of the  Shares  pledged
hereunder.

        4. Stock  Adjustments.  In the event that  during the term of the pledge
any stock dividend, reclassification, readjustment or other changes are declared
or made in the capital structure of Pledgee, all new, substituted and additional
shares  or  other  securities  issued  by  reason  of any such  change  shall be
delivered to and held by the Pledgee under the terms of this Security  Agreement
in the same manner as the Shares originally pledged  hereunder.  In the event of
substitution  of  such  securities,  Pledgor,  Pledgee  and  Pledgeholder  shall
cooperate and execute such  documents as are reasonable so as to provide for the
substitution  of such  Collateral  and,  upon such  substitution,  references to
"Shares" in this  Security  Agreement  shall include the  substituted  shares of
capital stock of Pledgor as a result thereof.

        5.  Options  and  Rights.  In the event  that,  during  the term of this
pledge,  subscription  Options  or other  rights or  options  shall be issued in
connection  with the pledged Shares,  such rights,  Options and options shall be
the property of Pledgor  and, if  exercised  by Pledgor,  all new stock or other
securities so acquired by Pledgor as it relates to the pledged  Shares then held
by Pledgeholder shall be immediately delivered to Pledgeholder, to be held under
the terms of this Security Agreement in the same manner as the Shares pledged.

        6. Default.  Pledgor shall be deemed to be in default of the Note and of
this Security Agreement in the event:

               a.  Payment  of  principal  or  interest  on the  Note  shall  be
delinquent for a period of 10 days or more; or

               b. Pledgor fails to perform any of the covenants set forth in the
Option or contained  in this  Security  Agreement  for a period of 10 days after
written notice thereof from Pledgee.

        In the case of an event of Default,  as set forth above,  Pledgee  shall
have the right to  accelerate  payment of the Note upon notice to  Pledgor,  and
Pledgee shall thereafter be entitled to pursue its remedies under the California
Commercial Code.

        7. Release of Collateral. Subject to any applicable contrary rules under
Regulation  G, there shall be released from this pledge a portion of the pledged
Shares held by  Pledgeholder  hereunder  upon  payments of the  principal of the
Note.  The number of the pledged  Shares  which shall be released  shall be that
number of full Shares which bears the same proportion to the initial number of


                                       -2-




Shares pledged  hereunder as the payment of principal  bears to the initial full
principal amount of the Note.

        8.  Withdrawal or  Substitution  of Collateral.  Pledgor shall not sell,
withdraw,  pledge,  substitute  or  otherwise  dispose of all or any part of the
Collateral without the prior written consent of Pledgee.

        9. Term. The within pledge of Shares shall continue until the payment of
all indebtedness secured hereby, at which time the remaining pledged stock shall
be promptly delivered to Pledgor, subject to the provisions for prior release of
a portion of the Collateral as provided in paragraph 7 above.

        10.  Insolvency.  Pledgor  agrees  that if a  bankruptcy  or  insolvency
proceeding is instituted by or against it, or if a receiver is appointed for the
property  of  Pledgor,  or if Pledgor  makes an  assignment  for the  benefit of
creditors, the entire amount unpaid on the Note shall become immediately due and
payable, and Pledgee may proceed as provided in the case of default.

        11.  Pledgeholder   Liability.  In  the  absence  of  willful  or  gross
negligence,  Pledgeholder  shall not be liable to any party for any of his acts,
or omissions to act, as Pledgeholder.

        12. Invalidity of Particular Provisions.  Pledgor and Pledgee agree that
the enforceability or invalidity of any provision or provisions of this Security
Agreement  shall not render any other provision or provisions  herein  contained
unenforceable or invalid.

        13.  Successors  or Assigns.  Pledgor and Pledgee  agree that all of the
terms of this Security Agreement shall be binding on their respective successors
and assigns,  and that the term  "Pledgor" and the term "Pledgee" as used herein
shall  be  deemed  to  include,  for all  purposes,  the  respective  designees,
successors, assigns, heirs, executors and administrators.

        14.  Governing Law. This Security  Agreement  shall be  interpreted  and
governed under the internal  substantive  laws, but not the choice of law rules,
of California.


                                       -3-




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



        "PLEDGOR"                            ---------------------------------
                                             Signature
                                             ---------------------------------
                                             Print Name

                         Address:            ---------------------------------

                                             ---------------------------------


        "PLEDGEE"                            Jenner Technologies,
                                             a Delaware corporation


                                             --------------------------------
                                             Signature
                                             --------------------------------
                                             Print Name
                                             --------------------------------
                                             Title


        "PLEDGEHOLDER"                       --------------------------------
                                             Secretary of
                                             Jenner Technologies




                                       -4-




                                    EXHIBIT C
                                    ---------

                                      NOTE


$_______________                                                 [City, State]

                                                           ______________, 19___

        FOR  VALUE   RECEIVED,   _______________   promises  to  pay  to  Jenner
Technologies,  a Delaware  corporation (the "Company"),  or order, the principal
sum of _______________________  ($_____________),  together with interest on the
unpaid  principal  hereof  from the date  hereof at the rate of  _______________
percent (____%) per annum, compounded semiannually.

        Principal and interest  shall be due and payable on  __________,  19___.
Payment of principal  and  interest  shall be made in lawful money of the United
States of America.

        The  undersigned  may at any  time  prepay  all  or any  portion  of the
principal or interest owing hereunder.

        This  Note  is  subject  to  the  terms  of  the  Option,  dated  as  of
________________.  This Note is  secured  in part by a pledge  of the  Company's
Common Stock under the terms of a Security  Agreement of even date  herewith and
is subject to all the provisions thereof.

        The  holder  of  this  Note  shall  have  full   recourse   against  the
undersigned,  and  shall not be  required  to  proceed  against  the  collateral
securing this Note in the event of default.

        In the event the undersigned shall cease to be an employee,  director or
consultant of the Company for any reason,  this Note shall, at the option of the
Company, be accelerated,  and the whole unpaid balance on this Note of principal
and accrued interest shall be immediately due and payable.

        Should any action be instituted  for the  collection  of this Note,  the
reasonable  costs and attorneys' fees therein of the holder shall be paid by the
undersigned.


                                            ------------------------------------

                                            ------------------------------------


                                       






                                 1997 STOCK PLAN

                     NOTICE OF GRANT OF STOCK PURCHASE RIGHT


        Unless  otherwise  defined  herein,  the terms defined in the Plan shall
have the same defined meanings in this Notice of Grant.

[Grantee's Name and Address]

        You have been granted the right to purchase Common Stock of the Company,
subject to the Company's  Repurchase Option and your ongoing status as a Service
Provider (as described in the Plan and the attached  Restricted  Stock  Purchase
Agreement), as follows:

        Grant Number                                 _________________________

        Date of Grant                                _________________________

        Price Per Share                              $________________________

        Total Number of Shares Subject               _________________________
          to This Stock Purchase Right

        Expiration Date:                             _________________________


        YOU MUST EXERCISE THIS STOCK PURCHASE  RIGHT BEFORE THE EXPIRATION  DATE
OR IT WILL  TERMINATE AND YOU WILL HAVE NO FURTHER RIGHT TO PURCHASE THE SHARES.
By your signature and the signature of the Company's  representative  below, you
and the  Company  agree that this  Stock  Purchase  Right is  granted  under and
governed by the terms and  conditions of the 1997 Stock Plan and the  Restricted
Stock Purchase Agreement, attached hereto as Exhibit A-1, both of which are made
a part of this  document.  You further agree to execute the attached  Restricted
Stock  Purchase  Agreement  as a condition to  purchasing  any shares under this
Stock Purchase Right.

GRANTEE:                                        JENNER TECHNOLOGIES


- ---------------------------                     --------------------------------
Signature                                       By

- ---------------------------                     --------------------------------
Print Name                                      Title

                                                





                                   EXHIBIT A-1
                                   -----------

                                 1997 STOCK PLAN

                       RESTRICTED STOCK PURCHASE AGREEMENT

        Unless  otherwise  defined  herein,  the terms defined in the Plan shall
have the same defined meanings in this Restricted Stock Purchase Agreement.

        WHEREAS the Purchaser named in the Notice of Grant, (the "Purchaser") is
an Service Provider,  and the Purchaser's continued  participation is considered
by the Company to be important for the Company's continued growth; and

        WHEREAS  in order to give the  Purchaser  an  opportunity  to acquire an
equity  interest in the Company as an incentive for the Purchaser to participate
in the affairs of the Company, the Admin istrator has granted to the Purchaser a
Stock  Purchase  Right  subject to the terms and  conditions of the Plan and the
Notice of Grant,  which are  incorporated  herein by reference,  and pursuant to
this Restricted Stock Purchase Agreement (the "Agreement").

        NOW THEREFORE, the parties agree as follows:

        1. Sale of Stock. The Company hereby agrees to sell to the Purchaser and
the  Purchaser  hereby agrees to purchase  shares of the Company's  Common Stock
(the  "Shares"),  at the per Share purchase price and as otherwise  described in
the Notice of Grant.

        2. Payment of Purchase  Price.  The purchase price for the Shares may be
paid by delivery to the Company at the time of  execution  of this  Agreement of
cash, a check, or some combination thereof.

        3. Repurchase Option.

               (a) In the event the  Purchaser  ceases to be a Service  Provider
for any or no reason  (including  death or disability)  before all of the Shares
are released from the Company's  Repurchase  Option (see Section 4), the Company
shall,  upon the date of such termination (as reasonably fixed and determined by
the Company) have an irrevocable, exclusive option (the "Repurchase Option") for
a period of sixty (60) days from such date to  repurchase  up to that  number of
shares which  constitute the Unreleased  Shares (as defined in Section 4) at the
original  purchase  price per share (the  "Repurchase  Price").  The  Repurchase
Option  shall be exercised by the Company by  delivering  written  notice to the
Purchaser or the Purchaser's executor (with a copy to the Escrow Holder) AND, at
the Company's  option,  (i) by  delivering  to the Purchaser or the  Purchaser's
executor a check in the amount of the  aggregate  Repurchase  Price,  or (ii) by
cancelling an amount of the Purchaser's indebtedness to the Company equal to the
aggregate  Repurchase  Price,  or (iii) by a combination of (i) and (ii) so that
the combined  payment and  cancellation  of  indebtedness  equals the  aggregate
Repurchase  Price. Upon delivery of such notice and the payment of the aggregate
Repurchase Price, the Company shall become the legal and beneficial owner of the
Shares being repurchased and all






rights and interests therein or relating thereto, and the Company shall have the
right to  retain  and  transfer  to its own  name the  number  of  Shares  being
repurchased by the Company.

               (b)  Whenever  the  Company  shall  have the right to  repurchase
Shares  hereunder,  the Company may designate and assign one or more  employees,
officers,  directors  or  shareholders  of  the  Company  or  other  persons  or
organizations  to exercise all or a part of the Company's  purchase rights under
this  Agreement  and purchase  all or a part of such Shares.  If the Fair Market
Value  of the  Shares  to be  repurchased  on the  date of such  designation  or
assignment (the "Repurchase FMV") exceeds the aggregate Repurchase Price of such
Shares,  then each such designee or assignee shall pay the Company cash equal to
the difference between the Repurchase FMV and the aggregate  Repurchase Price of
such Shares.

        4. Release of Shares From Repurchase Option.

               (a) _______________________ percent (______%) of the Shares shall
be released  from the Company's  Repurchase  Option [one year] after the Date of
Grant and __________________ percent (______%) of the Shares [at the end of each
month  thereafter],  provided that the Purchaser  does not cease to be a Service
Provider prior to the date of any such release.

               (b) Any of the Shares  that have not yet been  released  from the
Repurchase Option are referred to herein as "Unreleased Shares."

               (c) The Shares that have been released from the Repurchase Option
shall be delivered to the Purchaser at the Purchaser's request (see Section 6).

        5. Restriction on Transfer. Except for the escrow described in Section 6
or the transfer of the Shares to the Company or its  assignees  contemplated  by
this Agreement,  none of the Shares or any beneficial  interest therein shall be
transferred,  encumbered  or otherwise  disposed of in any way until such Shares
are released from the Company's  Repurchase  Option in accordance with the provi
sions  of  this  Agreement,  other  than by will  or the  laws  of  descent  and
distribution.

        6. Escrow of Shares.

               (a) To ensure the  availability  for delivery of the  Purchaser's
Unreleased  Shares upon  repurchase  by the Company  pursuant to the  Repurchase
Option,  the Purchaser  shall,  upon  execution of this  Agreement,  deliver and
deposit with an escrow holder  designated  by the Company (the "Escrow  Holder")
the share  certificates  representing the Unreleased  Shares,  together with the
stock  assignment  duly endorsed in blank,  attached  hereto as Exhibit A-2. The
Unreleased  Shares  and stock  assignment  shall be held by the  Escrow  Holder,
pursuant to the Joint Escrow  Instructions of the Company and Purchaser attached
hereto as  Exhibit  A-3,  until  such time as the  Company's  Repurchase  Option
expires.  As a  further  condition  to  the  Company's  obligations  under  this
Agreement, the


                                       -2-




Company may require the spouse of  Purchaser,  if any, to execute and deliver to
the Company the Consent of Spouse attached hereto as Exhibit A-4.

               (b) The Escrow  Holder  shall not be liable for any act it may do
or omit to do with  respect to holding  the  Unreleased  Shares in escrow  while
acting in good faith and in the exercise of its judgment.

               (c) If the  Company  or any  assignee  exercises  the  Repurchase
Option  hereunder,  the Escrow  Holder,  upon receipt of written  notice of such
exercise  from the  proposed  transferee,  shall  take all  steps  necessary  to
accomplish such transfer.

               (d) When the  Repurchase  Option  has been  exercised  or expires
unexercised  or a portion of the Shares has been  released  from the  Repurchase
Option, upon request the Escrow Holder shall promptly cause a new certificate to
be issued for the  released  Shares and shall  deliver  the  certificate  to the
Company or the Purchaser, as the case may be.

               (e) Subject to the terms hereof, the Purchaser shall have all the
rights of a  shareholder  with  respect  to the  Shares  while  they are held in
escrow,  including  without  limitation,  the  right to vote the  Shares  and to
receive any cash dividends  declared  thereon.  If, from time to time during the
term of the Repurchase Option,  there is (i) any stock dividend,  stock split or
other change in the Shares,  or (ii) any merger or sale of all or  substantially
all of the  assets  or  other  acquisition  of the  Company,  any and  all  new,
substituted  or  additional  securities  to which the  Purchaser  is entitled by
reason of the Purchaser's  ownership of the Shares shall be immediately  subject
to this escrow,  deposited  with the Escrow  Holder and included  thereafter  as
"Shares" for purposes of this Agreement and the Repurchase Option.

        7. Legends. The share certificate  evidencing the Shares, if any, issued
hereunder shall be endorsed with the following legend (in addition to any legend
required under applicable state securities laws):

        THE  SHARES  REPRESENTED  BY THIS  CERTIFICATE  ARE  SUBJECT  TO CERTAIN
RESTRICTIONS UPON TRANSFER AND RIGHTS OF REPURCHASE AS SET FORTH IN AN AGREEMENT
BETWEEN  THE COMPANY  AND THE  SHAREHOLDER,  A COPY OF WHICH IS ON FILE WITH THE
SECRETARY OF THE COMPANY.

        8.  Adjustment  for Stock Split.  All references to the number of Shares
and the purchase  price of the Shares in this Agreement  shall be  appropriately
adjusted  to reflect any stock  split,  stock  dividend  or other  change in the
Shares which may be made by the Company after the date of this Agreement.

        9. Tax Consequences. The Purchaser has reviewed with the Purchaser's own
tax advisors  the federal,  state,  local and foreign tax  consequences  of this
investment and the transactions  contem plated by this Agreement.  The Purchaser
is relying solely on such advisors and not on any statements


                                       -3-




or  representations  of  the  Company  or  any  of  its  agents.  The  Purchaser
understands  that the Purchaser (and not the Company)  shall be responsible  for
the Purchaser's own tax liability that may arise as a result of the transactions
contemplated by this Agreement. The Purchaser understands that Section 83 of the
Internal Revenue Code of 1986, as amended (the "Code"), taxes as ordinary income
the  difference  between the  purchase  price for the Shares and the Fair Market
Value of the Shares as of the date any restrictions on the Shares lapse. In this
context,  "restriction" includes the right of the Company to buy back the Shares
pursuant to the Repurchase Option. The Purchaser  understands that the Purchaser
may elect to be taxed at the time the Shares are purchased  rather than when and
as the  Repurchase  Option  expires by filing an election under Section 83(b) of
the Code with the IRS  within 30 days  from the date of  purchase.  The form for
making this election is attached as Exhibit A-5 hereto.

               THE  PURCHASER  ACKNOWLEDGES  THAT  IT IS  THE  PURCHASER'S  SOLE
RESPONSIBILITY  AND NOT THE COMPANY'S TO FILE TIMELY THE ELECTION  UNDER SECTION
83(b), EVEN IF THE PURCHASER REQUESTS THE COMPANY OR ITS REPRESENTATIVES TO MAKE
THIS FILING ON THE PURCHASER'S BEHALF.

        10. General Provisions.

               (a) This Agreement shall be governed by the internal  substantive
laws, but not the choice of law rules of California. This Agreement,  subject to
the terms and  conditions  of the Plan and the Notice of Grant,  represents  the
entire agreement  between the parties with respect to the purchase of the Shares
by the  Purchaser.  Subject  to  Section  15(c) of the  Plan,  in the event of a
conflict  between  the  terms  and  conditions  of the  Plan and the  terms  and
conditions  of this  Agreement,  the  terms  and  conditions  of the Plan  shall
prevail.  Unless otherwise  defined herein,  the terms defined in the Plan shall
have the same defined meanings in this Agreement.

               (b) Any notice,  demand or request  required or  permitted  to be
given by either  the  Company  or the  Purchaser  pursuant  to the terms of this
Agreement  shall  be in  writing  and  shall  be  deemed  given  when  delivered
personally or deposited in the U.S. mail, First Class with postage prepaid,  and
addressed to the parties at the addresses of the parties set forth at the end of
this  Agreement or such other  address as a party may request by  notifying  the
other in writing.

               Any notice to the Escrow  Holder  shall be sent to the  Company's
address with a copy to the other party hereto.

               (c) The  rights of the  Company  under  this  Agreement  shall be
transferable  to any one or more  persons or  entities,  and all  covenants  and
agreements  hereunder  shall inure to the benefit of, and be  enforceable by the
Company's  successors and assigns.  The rights and  obligations of the Purchaser
under this Agreement may only be assigned with the prior written  consent of the
Company.

               (d)  Either  party's  failure to enforce  any  provision  of this
Agreement  shall not in any way be construed as a waiver of any such  provision,
nor prevent that party from thereafter enforcing


                                       -4-



any other provision of this Agreement. The rights granted both parties hereunder
are  cumulative  and shall not  constitute a waiver of either  party's  right to
assert any other legal remedy available to it.

               (e) The  Purchaser  agrees  upon  request to execute  any further
documents  or  instruments  necessary  or desirable to carry out the purposes or
intent of this Agreement.

               (f) PURCHASER  ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES
PURSUANT TO SECTION 4 HEREOF IS EARNED ONLY BY  CONTINUING  SERVICE AS A SERVICE
PROVIDER AT THE WILL OF THE  COMPANY  (AND NOT THROUGH THE ACT OF BEING HIRED OR
PURCHASING SHARES  HEREUNDER).  PURCHASER  FURTHER  ACKNOWLEDGES AND AGREES THAT
THIS AGREEMENT, THE TRANSACTIONS CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE
SET FORTH HEREIN DO NOT  CONSTITUTE  AN EXPRESS OR IMPLIED  PROMISE OF CONTINUED
ENGAGEMENT AS A SERVICE PROVIDER FOR THE VESTING PERIOD,  FOR ANY PERIOD,  OR AT
ALL, AND SHALL NOT INTERFERE WITH  PURCHASER'S  RIGHT OR THE COMPANY'S  RIGHT TO
TERMINATE  PURCHASER'S  RELATIONSHIP AS A SERVICE  PROVIDER AT ANY TIME, WITH OR
WITHOUT CAUSE.

        By Purchaser's  signature below,  Purchaser represents that he or she is
familiar  with the terms and  provisions  of the Plan,  and hereby  accepts this
Agreement  subject to all of the terms and  provisions  thereof.  Purchaser  has
reviewed the Plan and this Agreement in their  entirety,  has had an opportunity
to obtain the advice of counsel  prior to  executing  this  Agreement  and fully
understands  all  provisions of this  Agreement.  Purchaser  agrees to accept as
binding,   conclusive  and  final  all  decisions  or   interpretations  of  the
Administrator  upon any  questions  arising  under  the Plan or this  Agreement.
Purchaser  further agrees to notify the Company upon any change in the residence
indicated in the Notice of Grant.

DATED:  ----------------------

PURCHASER:                                       JENNER TECHNOLOGIES


- ------------------------------                   -------------------------------
Signature                                        By

- ------------------------------                   -------------------------------
Print Name                                       Title


                                       -5-






                                   EXHIBIT A-2
                                   -----------

                      ASSIGNMENT SEPARATE FROM CERTIFICATE



        FOR VALUE RECEIVED I,  __________________________,  hereby sell,  assign
and transfer unto  __________________(__________)  shares of the Common Stock of
Jenner  Technologies  standing  in my name  of the  books  of  said  corporation
represented  by  Certificate  No.  _____  herewith  and  do  hereby  irrevocably
constitute  and  appoint  ___________________to  transfer  the said stock on the
books of the within named  corporation  with full power of  substitution  in the
premises.

        This Stock Assignment may be used only in accordance with the Restricted
Stock Purchase Agreement (the "Agreement")  between________________________  and
the undersigned dated ______________, 19__.


Dated: _______________, 19


                                            Signature:__________________________




INSTRUCTIONS:  Please do not fill in any blanks other than the  signature  line.
The  purpose  of this  assignment  is to enable  the  Company  to  exercise  the
Repurchase Option, as set forth in the Agreement,  without requiring  additional
signatures on the part of the Purchaser.


                                       




                                   EXHIBIT A-3
                                   -----------

                            JOINT ESCROW INSTRUCTIONS


                                                           __________ , 19___

Corporate Secretary
Jenner Technologies
2010 Crow Canyon Place, Suite 100
San Ramon, CA 94583



Dear ____________________:

        As Escrow  Agent for both Jenner  Technologies,  a Delaware  corporation
(the  "Company"),  and the  undersigned  purchaser  of stock of the Company (the
"Purchaser"),  you are hereby  authorized  and  directed  to hold the  documents
delivered to you pursuant to the terms of that certain Restricted Stock Purchase
Agreement  ("Agreement") between the Company and the undersigned,  in accordance
with the following instructions:

        1. In the event the Company and/or any assignee of the Company (referred
to collectively as the "Company")  exercises the Company's Repurchase Option set
forth in the  Agreement,  the Company  shall give to Purchaser and you a written
notice  specifying  the number of shares of stock to be purchased,  the purchase
price,  and the time for a  closing  hereunder  at the  principal  office of the
Company.  Purchaser and the Company hereby irrevocably  authorize and direct you
to close the  transaction  contemplated  by such notice in  accordance  with the
terms of said notice.

        2. At the closing,  you are  directed (a) to date the stock  assignments
necessary  for the  transfer  in  question,  (b) to fill in the number of shares
being  transferred,  and (c) to  deliver  same,  together  with the  certificate
evidencing  the  shares  of  stock  to be  transferred,  to the  Company  or its
assignee,  against the  simultaneous  delivery to you of the purchase  price (by
cash, a check,  or some  combination  thereof) for the number of shares of stock
being purchased pursuant to the exercise of the Company's Repurchase Option.

        3. Purchaser irrevocably  authorizes the Company to deposit with you any
certificates  evidencing  shares  of stock to be held by you  hereunder  and any
additions  and  substitutions  to  said  shares  as  defined  in the  Agreement.
Purchaser  does hereby  irrevocably  constitute  and appoint you as  Purchaser's
attorney-in-fact  and agent for the term of this escrow to execute  with respect
to  such  securities  all  documents  necessary  or  appropriate  to  make  such
securities  negotiable  and to complete  any  transaction  herein  contemplated,
including  but not  limited to the  filing  with any  applicable  state blue sky
authority of any required applications for consent to, or notice of transfer of,
the  securities.  Subject to the provisions of this paragraph 3, Purchaser shall
exercise all rights and  privileges  of a  shareholder  of the Company while the
stock is held by you.






        4. Upon  written  request  of the  Purchaser,  but no more than once per
calendar year, unless the Company's  Repurchase  Option has been exercised,  you
shall deliver to Purchaser a certificate or  certificates  representing  so many
shares of stock as are not then  subject  to the  Company's  Repurchase  Option.
Within  90 days  after  Purchaser  ceases to be a  Service  Provider,  you shall
deliver to Purchaser a certificate or  certificates  representing  the aggregate
number of shares held or issued  pursuant to the  Agreement and not purchased by
the Company or its assignees  pursuant to exercise of the  Company's  Repurchase
Option.

        5. If at the time of  termination of this escrow you should have in your
possession any documents,  securities, or other property belonging to Purchaser,
you shall  deliver all of the same to Purchaser  and shall be  discharged of all
further obligations hereunder.

        6. Your duties  hereunder may be altered,  amended,  modified or revoked
only by a writing signed by all of the parties hereto.

        7. You shall be obligated only for the performance of such duties as are
specifically  set forth herein and may rely and shall be protected in relying or
refraining  from  acting  on any  instrument  reasonably  believed  by you to be
genuine and to have been signed or presented by the proper party or parties. You
shall not be personally liable for any act you may do or omit to do hereunder as
Escrow Agent or as  attorney-in-fact  for Purchaser  while acting in good faith,
and any act done or omitted by you pursuant to the advice of your own  attorneys
shall be conclusive evidence of such good faith.

        8. You are hereby expressly authorized to disregard any and all warnings
given by any of the  parties  hereto  or by any  other  person  or  corporation,
excepting  only  orders or  process of courts of law,  and are hereby  expressly
authorized to comply with and obey orders, judgments or decrees of any court. In
case you obey or comply with any such order,  judgment or decree,  you shall not
be  liable  to  any of the  parties  hereto  or to any  other  person,  firm  or
corporation  by  reason  of such  compliance,  notwithstanding  any such  order,
judgment or decree being subsequently reversed,  modified,  annulled, set aside,
vacated or found to have been entered without jurisdiction.

        9. You shall not be liable in any  respect on  account of the  identity,
authorities  or rights of the parties  executing or  delivering or purporting to
execute or deliver the Agreement or any documents or papers  deposited or called
for hereunder.

        10. You shall not be liable for the  outlawing  of any rights  under the
statute of limitations  with respect to these Joint Escrow  Instructions  or any
documents deposited with you.

        11. You shall be entitled to employ such legal counsel and other experts
as you may deem  necessary  properly  to  advise  you in  connection  with  your
obligations  hereunder,  may rely upon the advice of such  counsel,  and may pay
such counsel reasonable compensation therefor.



                                       -2-




        12. Your  responsibilities  as Escrow Agent hereunder shall terminate if
you shall cease to be an officer or agent of the Company or if you shall  resign
by  written  notice to each  party.  In the event of any such  termination,  the
Company shall appoint a successor Escrow Agent.

        13. If you reasonably require other or further instruments in connection
with these Joint Escrow  Instructions  or  obligations  in respect  hereto,  the
necessary parties hereto shall join in furnishing such instruments.

        14. It is  understood  and agreed  that  should any  dispute  arise with
respect  to  the  delivery  and/or  ownership  or  right  of  possession  of the
securities  held by you hereunder,  you are authorized and directed to retain in
your possession  without  liability to anyone all or any part of said securities
until such disputes shall have been settled  either by mutual written  agreement
of the parties  concerned or by a final order,  decree or judgment of a court of
competent  jurisdiction  after the time for appeal has expired and no appeal has
been perfected, but you shall be under no duty whatsoever to institute or defend
any such proceedings.

        15. Any notice required or permitted hereunder shall be given in writing
and shall be deemed  effectively given upon personal delivery or upon deposit in
the United States Post Office,  by registered or certified mail with postage and
fees prepaid,  addressed to each of the other parties thereunto  entitled at the
following  addresses or at such other  addresses as a party may designate by ten
days' advance written notice to each of the other parties hereto.


               COMPANY:                     Jenner Technologies
                                            2010 Crow Canyon Place, Suite 100
                                            San Ramon, CA 94583

               PURCHASER:                    
                                            ----------------------------------
                                             
                                            ----------------------------------  

                                            ----------------------------------


               ESCROW AGENT:                Corporate Secretary
                                            2010 Crow Canyon Place, Suite 100
                                            San Ramon, CA 94583

        16. By  signing  these  Joint  Escrow  Instructions,  you become a party
hereto only for the purpose of said Joint Escrow Instructions; you do not become
a party to the Agreement.

        17. This  instrument  shall be binding  upon and inure to the benefit of
the parties hereto, and their respective successors and permitted assigns.


                                       -3-



        18. These Joint Escrow  Instructions shall be governed by, and construed
and enforced in accordance  with,  the internal  substantive  laws,  but not the
choice of law rules, of California.

                                     Very truly yours,

                                     JENNER TECHNOLOGIES


                                     -------------------------------------
                                     By

                                     -------------------------------------
                                     Title

                                     PURCHASER:

                                     -------------------------------------
                                     Signature

                                     -------------------------------------
                                     Print Name


ESCROW AGENT:


- -------------------------------------
Corporate Secretary


                                       -4-






                                   EXHIBIT A-4
                                   -----------

                                CONSENT OF SPOUSE


        I,  ____________________,  spouse of ___________________,  have read and
approve the foregoing Restricted Stock Purchase Agreement (the "Agreement").  In
consideration  of the  Company's  grant to my spouse  of the  right to  purchase
shares of Jenner Technologies,  as set forth in the Agreement,  I hereby appoint
my spouse as my  attorney-in-fact in respect to the exercise of any rights under
the Agreement and agree to be bound by the  provisions of the Agreement  insofar
as I may have any rights in said Agreement or any shares issued pursuant thereto
under the community  property laws or similar laws relating to marital  property
in effect in the state of our  residence  as of the date of the  signing  of the
foregoing Agreement.

Dated: _______________, 19__


                                          --------------------------------------
                                          Signature of Spouse





                                                  
                                   EXHIBIT A-5
                                   -----------

                          ELECTION UNDER SECTION 83(b)
                      OF THE INTERNAL REVENUE CODE OF 1986


The  undersigned  taxpayer  hereby  elects,  pursuant  to  Section  83(b) of the
Internal Revenue Code of 1986, as amended, to include in taxpayer's gross income
for the current taxable year the amount of any compensation  taxable to taxpayer
in connection with his or her receipt of the property described below:

1.      The name, address,  taxpayer  identification  number and taxable year of
        the undersigned are as follows:

        NAME:                        TAXPAYER:                SPOUSE:

        ADDRESS:

        IDENTIFICATION NO.:          TAXPAYER:                SPOUSE:

        TAXABLE YEAR:

2.      The property  with respect to which the election is made is described as
        follows:______  shares  (the  "Shares")  of the  Common  Stock of Jenner
        Technologies (the "Company").

3.      The date on which the property was transferred is: __________, 19__.

4.      The property is subject to the following restrictions:

        The Shares may be  repurchased  by the Company,  or its  assignee,  upon
        certain events. This right lapses with regard to a portion of the Shares
        based on the  continued  performance  of services by the  taxpayer  over
        time.

5.      The fair market value at the time of transfer, determined without regard
        to any  restriction  other  than a  restriction  which by its terms will
        never lapse, of such property is: $___________________.

6.      The amount (if any) paid for such property is: $____________________.

The  undersigned  has submitted a copy of this  statement to the person for whom
the services were performed in connection with the undersigned's  receipt of the
above-described  property.  The  transferee  of  such  property  is  the  person
performing the services in connection with the transfer of said property.

The  undersigned  understands  that the  foregoing  election  may not be revoked
except with the consent of the Commissioner.

Dated: _______________, 19____          ________________________________________
                                        Taxpayer



The undersigned spouse of taxpayer joins in this election.

Dated: _______________, 19____          ________________________________________
                                        Spouse of Taxpayer





                                                                    EXHIBIT 10.4



                               JENNER TECHNOLOGIES
                             NOTE PURCHASE AGREEMENT

         This Agreement is made as of May 6, 1996 between Jenner Technologies, a
California corporation (the "Company") and Hayden Leason (the "Investor").

         1.       The Note.

                  1.1  The  Notes.  The  Investor  agrees,   on  the  terms  and
conditions  specified in this Agreement,  to lend to the Company  $3,000,0000 at
the Closing (as defined  below).  The  Investor's  loan shall be  evidenced by a
secured promissory note ("Note") dated as of the date of the Closing in the form
of Exhibit A. The Note shall not be convertible into any shares of the Company's
capital stock.

                  1.2 Place and Date of Closing. The closing of the purchase and
sale of the Note (the "Closing") will be held at the offices of Wilson, Sonsini,
Goodrich & Rosati,  650 Page Mill Road,  Palo Alto,  California at 10:00 a.m. on
May 6, 1996,  or at such other time and place as the  Company  and the  Investor
shall mutually agree (the "Closing Date").

                  1.3  Delivery.  At the Closing,  the Company shall deliver the
Note  to the  Investor,  and the  Investor  shall  deliver  to the  Company  the
principal amount thereof by check or wire transfer.

         2.       Representations and Warranties of the Company.

                  2.1  Organization  and Standing.  The Company is a corporation
duly  organized  and  validly  existing  under,  and by virtue  of,  the laws of
California  and is in  good  standing  under  such  laws.  The  Company  has all
requisite  corporate power and authority to own its properties and assets and to
carry on its  business as  presently  conducted.  The Company is qualified to do
business as a foreign  corporation in each  jurisdiction in which the failure to
be so  qualified  would  have  materially  adverse  impact  on the  business  or
financial condition of the Company taken as a whole.

                  2.2  Corporate  Power and  Authorization.  The Company has all
requisite  legal and corporate  power to execute and deliver this  Agreement and
the  Note,  and to sell and  issue  the Note to the  Investor  pursuant  to this
Agreement.  All corporate  action on the part of the Company,  its directors and
shareholders  necessary  for the sale and issuance of the Note has been taken or
will be taken prior to the Closing.  Each of the  Agreement  and the Note,  when
executed and  delivered by the Company,  shall  constitute a valid,  binding and
enforceable obligation of the Company,  except as the enforcement thereof may be
limited by applicable  bankruptcy,  insolvency,  reorganization  or similar laws
relating  to or  affecting  the  enforcement  of  creditor's  rights  and to the
availability of the remedy of specific  performance.  The execution and delivery
of this  Agreement  and the Note will not violate,  conflict with or result in a
material  breach of (i) the  Company's  Articles  of  Incorporation,  as amended
through the Closing Date; (ii) the Company's Bylaws;  (iii) any judgment,  order
or decree of any court or  arbitrator  to which the Company is a party;  or (iv)
any contract,  undertaking,  indenture or other agreement or instrument by which
the  Company  is now  bound or to which it is now a party.  The  Company  is not
subject to any judgment, order or decree of any court or arbitrator.  Except for
notices  required  or  permitted  to be filed  with  certain  state and  federal
securities commissions, which







notices the Company agrees to file on a timely basis, the execution and delivery
of the Note by the Company to the  Investor  will not  require any  governmental
consent or approval.

         3.       Representations, Warranties of the Investors and Restrictions
                  on Transfer Imposed by the Securities Act of 1933.

                  3.1  Representations  and  Warranties  of  the  Investor.  The
Investor represents and warrants to the Company as follows:

                       (a)  All  action  on the  part  of the  Investor  for the
authorization,  execution,  delivery  and  performance  by the  Investor of this
Agreement  has been taken,  and this  Agreement  constitutes a valid and binding
obligation of the Investor,  enforceable in accordance with its terms, except as
may be limited by applicable bankruptcy, insolvency, reorganization,  moratorium
or other similar laws  affecting the  enforcement  of creditor's  rights and the
availability of the remedy of specific performance.

                       (b)  The  Investor  is   experienced  in  evaluating  and
investing in new companies and companies with limited  operating  histories such
as the Company.

                       (c) The Investor is acquiring the Note for investment for
its own account and not with a view to, or for resale in  connection  with,  any
distribution.  The Investor  understands  that the Note has not been  registered
under the Securities Act of 1933, as amended (the "Act") by reason of a specific
exemption from the registration  provisions of the Act which depends upon, among
other things, the bona fide nature of the investment intent as expressed herein.

                       (d) The Investor  acknowledges that the Note must be held
indefinitely unless  subsequently  registered under the Act or an exemption from
such registration is available.  The Investor is aware of the provisions of Rule
144  promulgated  under  the Act which  permits  limited  resale  of  securities
purchased  in a  private  placement  subject  to  the  satisfaction  of  certain
conditions,  including,  in case the Investor has held the  securities  for less
than three years or is an  affiliate  of the Company,  among other  things:  the
availability of certain current public information about the Company, the resale
occurring  not less than two years after a party has  purchased and paid for the
securities  to be sold,  the sale being through a "broker's  transaction"  or in
transactions directly with a "market maker," and the number of shares being sold
during any three-month period not exceeding specified limitations.

                       (e) The Investor  understands  that no public  market now
exists for any of the  securities  issued by the Company and that it is unlikely
that a public market will ever exist for the Note.

                       (f) The Investor is a  sophisticated  investor  with such
knowledge and  experience in financial and business  matters so as to be capable
of evaluating  the merits and risks of a prospective  investment in the Note and
who is capable of bearing the economic risks of such


                                       -2-






investment.  The  Investor  is an  accredited  investor  within  the  meaning of
Regulation D promulgated by the Securities and Exchange  Commission  pursuant to
the Act.

                       (g) In taking any action or performing  any role relative
to  arranging  the  proposed  investment,  the  Investor has acted solely in the
Investor's own interest. Neither the Investor nor any of his agents or employees
has acted as an agent of the  Company,  or as an  issuer,  underwriter,  broker,
dealer or investment advisor relative to the Note.

                  3.2 Legends.  The  instrument  representing  the Note shall be
endorsed with the  following  legend (in addition to any legend  required  under
applicable state securities laws):

         THE SECURITIES  REPRESENTED  HEREBY HAVE NOT BEEN REGISTERED  UNDER THE
         SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), OR UNDER THE SECURITIES
         LAWS OF CERTAIN STATES. THESE SECURITIES ARE SUBJECT TO RESTRICTIONS ON
         TRANSFERABILITY  AND RESALE AND MAY NOT BE TRANSFERRED OR RESOLD EXCEPT
         AS PERMITTED UNDER THE ACT AND THE APPLICABLE  STATE  SECURITIES  LAWS,
         PURSUANT TO REGISTRATION OR EXEMPTION THEREFROM.

                  The Company  need not record a transfer of the Note unless the
conditions  specified in the foregoing  legends are  satisfied.  The Company may
also  instruct its transfer  agent not to record the transfer of the Note unless
the conditions specified in the foregoing legends are satisfied.

                  3.3 Removal of Legends and Transfer  Restrictions.  The legend
relating to the Act endorsed on a certificate  pursuant to paragraph 3.2 of this
Agreement  and the stop  transfer  instructions  with respect  thereto  shall be
removed and the Company  shall issue a  certificate  without  such legend to the
holder thereof if the securities  represented by such certificate are registered
under the Act and a prospectus meeting the requirements of Section 10 of the Act
is available or if such holder provides to the Company an opinion of counsel for
such holder  reasonably  satisfactory to the Company,  or a no-action  letter or
interpretive opinion of the staff of the Securities and Exchange Commission (the
"Commission")  to the effect that a public sale,  transfer or  assignment of the
Note  may  be  made  without   registration  and  without  compliance  with  any
restriction such as Rule 144.

         4.       Miscellaneous.

                  4.1 General.  This Agreement shall be governed in all respects
by the laws of the State of  California  as such laws are applied to  agreements
between  California  residents entered into and to be performed  entirely within
California.  This  Agreement  and all  attached  exhibits  represent  the entire
agreement  between  the  Company and the  Investor  with  respect to the subject
matter  herein and  therein  and  supersedes  any and all prior oral and written
discussions  and  agreements.  This  Agreement  and the Note may only be waived,
modified or amended in writing signed by both the Company and the Investor.



                                       -3-





         4.2 Notices. Any notice,  demand or request required or permitted under
this  Agreement  or the Note shall be given in writing and shall be deemed given
upon (i) personal  delivery to the party to be  notified,  (ii)  transmittal  by
facsimile,  telecopy or  electronic  mail,  or (iii)  deposit  with an overnight
delivery  service  or with  the  United  States  Post  Office,  by  first-class,
registered or certified  mail,  postage prepaid and addressed to the party to be
notified at the address of such party set forth at the end of this Agreement, or
such other address as a party may request by notifying the other in writing.

         4.3 Tax Matters.  The Investor  understands  that the Investor (and not
the Company) shall be responsible for the Investor's own federal,  state,  local
or foreign tax liability and any of the Investor's other tax  consequences  that
may arise as a result of the  transactions  contemplated by this Agreement.  The
Investor  shall rely  solely on the  determinations  of the  Investor's  own tax
advisors or his own determinations, and not on any statements or representations
by the Company or any of its agents, with regard to all such tax matters.

                  4.4  California  Corporate  Securities  Law.  THE  SALE OF THE
SECURITIES  WHICH ARE THE SUBJECT OF THIS  AGREEMENT HAS NOT BEEN QUALIFIED WITH
THE  COMMISSIONER OF CORPORATIONS OF THE STATE OF CALIFORNIA AND THE ISSUANCE OF
THE  SECURITIES  OR THE  PAYMENT  OR  RECEIPT  OF ANY PART OF THE  CONSIDERATION
THEREFOR PRIOR TO SUCH  QUALIFICATION  IS UNLAWFUL UNLESS THE SALE OF SECURITIES
IS EXEMPT  FROM THE  QUALIFICATION  BY  SECTION  25100,  25102,  OR 25105 OF THE
CALIFORNIA  CORPORATIONS  CODE.  THE RIGHTS OF ALL PARTIES TO THIS AGREEMENT ARE
EXPRESSLY CONDITIONED UPON SUCH QUALIFICATION BEING OBTAINED, UNLESS THE SALE IS
SO EXEMPT.

                  4.5 Counterparts. This Agreement may be executed in any number
of counterparts,  each of which shall be an original,  but all of which together
shall constitute one instrument.

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

JENNER TECHNOLOGIES


By:/s/ ANTHONY E.  MAIDA                          /s/ HAYDEN LEASON
   -----------------------------                  ------------------------------
                                                  Hayden Leason
Title:CEO
      -----------------------------------

828 Eastbrook Avenue                              10 Monte Sol
Danville, CA  94506                               Palmas Del Mar
                                                  Humacao, Puerto Rico  00792




                                       -4-






                                    EXHIBIT A

THE SECURITIES  REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933,  AS AMENDED (THE "ACT"),  OR UNDER THE  SECURITIES  LAWS OF CERTAIN
STATES.  THESE  SECURITIES ARE SUBJECT TO  RESTRICTIONS ON  TRANSFERABILITY  AND
RESALE AND MAY NOT BE  TRANSFERRED  OR RESOLD EXCEPT AS PERMITTED  UNDER THE ACT
AND THE APPLICABLE STATE SECURITIES LAWS,  PURSUANT TO REGISTRATION OR EXEMPTION
THEREFROM.


                               JENNER TECHNOLOGIES

                             SECURED PROMISSORY NOTE


$3,000,000.00                                              Danville, California
                                                                    May 6, 1996


         FOR VALUE RECEIVED, JENNER TECHNOLOGIES,  a California corporation (the
"Company")  hereby  absolutely  and  unconditionally  promises  to pay to Hayden
Leason (the  "Lender"),  or order,  the  principal  amount of Three  Million and
No/100 Dollars ($3,000,000.00),  together with simple interest on such principal
amount at the rate of 10% per annum.

         This Note is issued pursuant to the terms of a Note Purchase  Agreement
(the "Note  Purchase  Agreement")  dated the date hereof between the Company and
the Lender.

         1.       Repayments and Prepayments.

                  (a) All principal and accrued  interest  under this Note shall
be due and payable on May 6, 1999.

                  (b) The Company  may prepay  this Note at any time,  either in
whole or in part,  without  premium or penalty and without the prior  consent of
the Lender.

                  (c) All  payments  received  under  this Note shall be applied
first to accrued  interest  on the date of payment  and then to the  outstanding
principal balance of this Note.

         2.  Security.  The full and  timely  payment  of the  principal  of and
interest  on this Note is secured by the pledge by the  Company to the Lender of
all shares of capital  stock and rights to acquire  capital  stock of  TherAtid,
Incorporated,  a California corporation, now held or hereinafter acquired by the
Company,  pursuant to the terms of the Stock  Pledge  Agreement  dated as of the
date hereof (the "Stock Pledge Agreement") between the Company, as pledgor,  and
the Lender,  as pledgee.  Reference is made to the Stock Pledge  Agreement for a
more  detailed  description  of the  collateral  which secures this Note and the
rights of the Lender in respect of such collateral.










         3.       Events of Default; Acceleration.

                  (a) The principal amount of this Note is subject to prepayment
in whole or in part upon the occurrence and during the continuance of any of the
following  events (each,  an "Event of Default"):  (i) failure to pay any amount
owing by the Company  hereunder when due and payable,  or (ii) the initiation of
any bankruptcy,  insolvency,  moratorium,  receivership or  reorganization by or
against the Company,  or a general  assignment  of assets by the Company for the
benefit of creditors.  Upon the  occurrence of any Event of Default,  the entire
unpaid  principal  balance of this Note and all of the unpaid  interest  accrued
thereon shall be immediately due and payable.

                  (b) No remedy herein  conferred upon the Lender is intended to
be exclusive  of any other remedy and each and every remedy shall be  cumulative
and in addition to every other remedy hereunder now or hereafter existing at law
or in equity or otherwise.

         4.       Notices.

                  (a) All notices or other communications  required or permitted
to be given  hereunder  shall be  delivered  as  provided  in the Note  Purchase
Agreement.

         5.       Miscellaneous.

                  (a) This  Note may only be  waived,  modified  or  amended  in
writing signed by both the Company and the Investor.

                  (b) No failure or delay by the  Lender to  exercise  any right
hereunder  shall  operate as a waiver  thereof,  nor shall any single or partial
exercise of any right,  power or privilege  preclude  any other right,  power or
privilege.  The  provisions  of this Note are severable and if any one provision
hereof  shall  be held  invalid  or  unenforceable  in  whole  or in part in any
jurisdiction,  such  invalidity  or  unenforceability  shall  affect  only  such
provision in such jurisdiction.  This Note expresses the entire understanding of
the parties with respect to the transactions  contemplated  hereby.  The Company
and every endorser and guarantor of this Note  regardless of the time,  order or
place of signing hereby waives presentment,  demand, protest and notice of every
kind,  and assents to any extension or  postponement  of the time for payment or
any other indulgence,  to any  substitution,  exchange or release of collateral,
and to the  addition  or  release  of any  other  party or person  primarily  or
secondarily liable.

                  (c) If Lender retains an attorney for collection of this Note,
or if any suit or proceeding is brought for the recovery of all, or any part of,
or for protection of the indebtedness respected by this Note Agreement, then the
Company  agrees  to pay on  demand  all  costs  and  expenses  of  the  suit  or
proceeding,  or any appeal thereof,  incurred by the Lender,  including  without
limitation, reasonable attorneys' fees.



                                       -2-





                  (d) This Note  shall for all  purposes  be  governed  by,  and
construed  in  accordance  with the laws of the  State  of  California  (without
reference to conflict of laws).

                  (e) This Note shall be binding upon the  Company's  successors
and  assigns,  and shall inure to the  benefit of the  Lender's  successors  and
assigns.

         IN WITNESS WHEREOF,  the Company has caused this Note to be executed by
its duly  authorized  officer to take  effect as of the date  first  hereinabove
written.


                                        JENNER TECHNOLOGIES


                                        By:
                                           -----------------------------
                                        Title:
                                               -------------------------



                                       -3-









                                                                    EXHIBIT 10.5

                                LICENSE AGREEMENT


         THIS LICENSE AGREEMENT (the "Agreement")  effective as of April 4, 1996
(the "Effective  Date"), is entered by and between  CIBA-GEIGY  Limited, a Swiss
corporation,  with principal offices at Klybeckstrasse  141, Basel,  Switzerland
("Ciba"),  and  TherAtid,  Incorporated,  a  California  corporation,  having  a
principal  place  of  business  at 828  Eastbrook  Court,  Danville,  California
94506-1206   ("TherAtid").   All   references  to  TherAtid  shall  include  its
Affiliates.

                                    RECITALS

         A. Ciba is the sole and  exclusive  owner of certain  Patent Fights and
Know-How (as such terms are defined  below)  relating to [*] and analogs of such
compounds, and the use thereof, and related subject matter; and

         B. TherAtid desires to obtain an exclusive license to the Patent Rights
and  Know-How  and Ciba is willing to grant such a license to  TherAtid,  on the
terms and conditions herein.

         NOW, THEREFORE, Ciba and TherAtid agree as follows:

         1.       Definitions.

                  1.1 "Affiliate"  means,  with respect to each party, any legal
entity that  directly or  indirectly  controls,  is  controlled  by, or is under
common  control  with,  such party,  but only for so long as such control  shall
continue.  One entity shall be deemed to control  another  entity if such entity
has the power to direct or cause the direction of the  management or policies of
the other entity.

                  1.2 "Confidential  Information" shall mean (i) any proprietary
or  confidential  information or material in tangible form  disclosed  hereunder
that is marked as  "confidential"  at the time it is delivered to the  receiving
party,  or  (ii)  proprietary  or  confidential   information  disclosed  orally
hereunder which is identified as confidential or proprietary  when disclosed and
such  disclosure  of  confidential  information  is confirmed in writing  within
thirty (30) days by the disclosing party.

                  1.3 "Dominating  Patent" shall mean an unexpired  patent owned
or  controlled  by a third  party  that  has  not  been  invalidated  in a final
unappealed or unappealable judgment by a court or competent jurisdiction,  which
patent  covers  the  manufacture,   use  or  sale  of  Licensed  Products  under
circumstances  such  that  TherAtid  or its  sublicensees  have no  commercially
reasonable alternative to obtaining a royalty-bearing  license under such patent
in order to commercialize Licensed Products under this Agreement.

                  1.4 "Field"  shall mean all human and  veterinary  therapeutic
and prophylactic uses,  excluding use as a vaccine adjuvant and, with respect to
[*], excluding use for the treatment of asthma and other allergic diseases which
materially affect lung function. As used herein, "vaccine


                                       -1-






adjuvant"  shall mean a  substance  administered  with an antigen to enhance the
immune response to that antigen.

                  1.5 "Gross  Profit" shall mean Net Sales  amounts  received by
TherAtid for the  commercial  sale of Licensed  Products,  less (i) any taxes or
other  government  levies due with  regard to such  amounts,  (ii) any  expenses
incurred or accrued in connection with the manufacture,  use, marketing, sale or
other disposition of the Licensed Products, and (iii) general and administrative
expenses, reasonably allocated according to GAAP.

                  1.6 "Know-How" shall mean all ideas,  inventions,  data, trade
secrets,   instructions,   processes,   formulas,   chemical,   pharmacological,
toxicological, pharmaceutical, physical and analytical, manufacturing (including
but not  limited to  processes,  yields,  reagents  and  conditions  relating to
compound manufacture) data and information, owned or controlled by Ciba existing
as of the Effective Date,  which are not generally known during the term of this
Agreement,  and which are  sufficient  to allow a chemist  skilled in the art to
synthesize and manufacture Licensed Products, in liposome form or otherwise.

                  1.7 "Licensed Product" will mean any product which (i) but for
the license  granted  herein  would  infringe a Valid Claim in the country  such
product is made or sold, or (ii)  incorporates in material part or is made using
Know How.

                  1.8 "Net Sales"  means the gross  revenues  actually  received
from sales of  Licensed  Products  by TherAtid  and its  sublicensees,  less (i)
normal and customary rebates, and cash and trade discounts, actually taken, (ii)
sales,  use and/or other excise taxes or duties actually paid, (iii) the cost of
any  packages  and  packing,  if billed  separately,  (iv)  insurance  costs and
outbound  transportation  charges  prepaid or allowed,  (v) import and/or export
duties actually paid, and (vi) amounts allowed or credited due to returns.

                  1.9  "Patent  Rights"  means the  patents  listed on Exhibit A
hereto,   and   all   divisions,   continuations,   continuations-in-part,   and
substitutions  thereof.  Patent  Rights  shall also include any U.S. and foreign
patent  applications  or  patents  owned  by or  licensed  to Ciba  which  claim
inventions  relating  to the patent  rights  listed on Exhibit A,  conceived  or
reduced to practice in  connection  with research  sponsored by Ciba  including,
without  limitation,  in the  laboratory  of Dr.  Isaiah  J.  Fidler at the M.D.
Anderson Cancer Center at the University of Texas.

                  1.10  "Territory" means all countries of the world.

                  1.11  "Valid  Claim"  means  (i)  a  claim  of an  issued  and
unexpired  patent  included  within  the Patent  Rights  which has not been held
unenforceable  or invalid by a court or other  governmental  agency of competent
jurisdiction,  and which has not been  disclaimed  or  admitted to be invalid or
unenforceable  through  reissue  or  otherwise,  or  (ii) a claim  of a  pending
application within the Patent Rights.



                                       -2-






         2.       Grant.

                  Ciba  hereby  grants  to  TherAtid  an  exclusive,  worldwide,
royalty  bearing  license under the Patent  Rights,  with the fight to grant and
authorize  sub-licenses,  to make, have made, import, have imported,  use, sell,
offer for sale and otherwise  exploit the Licensed  Products in the Field in the
Territory.

         3.       Technical Assistance.

                  3.1  Delivery of Know-How.  Within  ninety (90) days after the
Effective  Date,  Ciba shall  deliver to TherAtid the Know-How in  electronic or
hard copy formats.

                  3.2  Technical  Assistance.  Until  six (6)  months  following
delivery of the Know- How pursuant to Section 3.1, at TherAtid's  request,  Ciba
shall  promptly  provide  TherAtid  or its  designee,  instruction,  advice  and
assistance  regarding  the practice of the Patent Rights and use of the KnowHow,
including  without  limitation,  relating to the manufacture of compounds within
the scope of the Patent  Rights.  Such  assistance  shall be  provided at a site
agreed by the parties, at agreed times.
[*]

                  3.3  Regulatory  Data  and  Filings.  On the  Effective  Date,
without additional cost, Ciba shall promptly provide TherAtid with access to and
the fight to use all  regulatory  filings  made by Ciba or its  Affiliates  with
respect to compounds  within the scope of the Patent  Rights,  together with the
underlying pre-clinical and clinical data. TherAtid and its sublicensees may use
and incorporate such filings and data in support of efforts to obtain regulatory
approval of Licensed Products worldwide.

                  3.4 Clinical  Trial Data. So far as it has the right to do so,
Ciba shall provide  TherAtid with all data from any clinical trials performed by
Ciba or its  Affiliates  with  respect to any  compound  within the scope of the
Patent  Rights  including  but not  limited  to  copies  of any  clinical  trial
agreement(s), protocols, case report forms and supporting documentation relating
to Phase II trials of such  compounds.  For those  data yet to become  available
from the ongoing Phase III clinical  trial with respect to the evaluation of [*]
for the  treatment  of  osteogenic  sarcoma in progress at the  National  Cancer
Institute of the U.S.  National  Institutes  of Health  ("NCI") on the Effective
Date,  Ciba will use all reasonable  endeavors to help TherAtid obtain access to
such data directly from the NCI,  including  making a written request to the NCI
to give TherAtid access to the data.

                  TherAtid and its  sublicensees  may use and  incorporate  such
data in  support  of  filings  for  regulatory  approval  of  Licensed  Products
worldwide.

                  3.5 Other  Intellectual  Property.  In the event that Ciba has
any option or other rights with respect to intellectual property relating to the
Field developed in connection with research sponsored by Ciba including, without
limitation,  in the  laboratory  of Dr.  Isaiah J.  Fidler at the M.D.  Anderson
Cancer  Center at the  University of Texas,  and the owner of such  intellectual
property

                                       -3-






refuses to  acknowledge  or  contests  such  rights,  Ciba shall use  reasonable
endeavors to perfect and enforce its interest in such intellectual property.

         4.       Consideration.

                  4.1 License  Fee.  Within  thirty  (30) days of the  Effective
Date, TherAtid shall pay to Ciba a license fee of [*].

                  4.2  Annual  Maintenance  Fee.  TherAtid  shall pay to Ciba an
annual  maintenance  fee  of [*]  during  the  period  commencing  on the  first
anniversary  of the Effective  Date and  continuing  until the initiation of any
Phase III clinical trial sponsored by TherAtid or a TherAtid sublicensee for any
Licensed  Product;  provided,  however,  that in the event  that any  additional
patients  are added to the Phase III  clinical  trial of [*] in  progress on the
Effective Date at the National Cancer Institute of the U.S. National  Institutes
of  Health,  TherAtid's  obligations  to pay the  annual  maintenance  fee shall
terminate on the date that the first such  patient is enrolled in such  clinical
trial.

                  4.3  Milestone  Payments.  Unless the  Agreement is terminated
earlier, following the first achievement by TherAtid of the following milestones
with respect to such first Licensed  Product for humans  incorporating  [*], and
the first Licensed Product for humans incorporating [*], TherAtid shall pay Ciba
one-time milestone payments, as follows:


                         Event                         Payment
                         -----                         -------
[*]



The  payments  set  forth  above  shall  be made  with  respect  to each of [*],
provided,  however,  if TherAtid ceases all development of [*] after having made
payments  with  respect  to the  applicable  compound  under  this  Section  4.3
following the accomplishment of any milestone  specified herein,  there shall be
no payment due upon the  accomplishment  of that same  milestone with respect to
any  subsequent  back-up  compound  after the first backup  compound  pursued by
TherAtid.  When  milestones  are  achieved  with  respect to such first  back-up
compound  which were not  previously  paid with respect to an earlier  compound,
such milestone payments shall be paid pursuant to this Section 4.3.

                  4.4 Royalties. In consideration of the license granted herein,
TherAtid shall pay to Ciba  royalties on Net Sales of Licensed  Products sold by
TherAtid on a Licensed Product-by- Licensed Product basis as set forth below:

                      4.4.1 Licensed  Products Sold by TherAtid.  TherAtid shall
pay to Ciba the  following  royalties  with  respect  to Net  Sales of  Licensed
Products sold by TherAtid, as follows:


                                       -4-







                                    (a)     [*]

                                    (b)     [*]

                      4.4.2  Licensed  Products Sold by  Sublicensees.  TherAtid
shall pay to Ciba the following  royalties with respect to Net Sales of Licensed
Products sold by sublicensees of TherAtid, as follows:

                                    (a)     [*]

                                    (b)     [*]

                  Notwithstanding  the above,  in the event that TherAtid has an
ownership interest, direct or indirect, [*] in any sublicensee,  royalties shall
be due with  respect  to sales of  Licensed  Products  at the rates set forth in
Section 4.2.1, rather than the rates set forth in this Section 4.2.2.

                      4.4.3  Royalty  Reduction.  The royalty rates set forth in
Sections  4.4.1  and  4.4.2  above  shall be  reduced  by [*] if the  applicable
Licensed  Products  are not within the scope of an issued Valid Claim within the
Patent Rights in the country such Licensed Products are either made or sold.

                  4.5 Commercial Impracticability. Notwithstanding the above, in
the event that TherAtid believes that the foregoing royalty rates would make the
sale of Licensed Products commercially  impracticable it may notify Ciba, and in
such  event the  parties  shall  negotiate  in good  faith a  reduction  in such
royalties; provided, the foregoing terms shall remain in effect until such other
terms are agreed in writing.

                  4.6 One Royalty. No more than one royalty payment shall be due
with respect to a sale of a particular  Licensed Product.  No multiple royalties
shall be payable because any Licensed Product,  or its manufacture,  sale or use
is  covered by more than one Valid  Claim.  No  royalty  shall be payable  under
Section 4.4 above with respect to sales of Licensed  Products among TherAtid and
its sublicensees, but shall be payable on sales of Licensed Products by TherAtid
or its sublicensees to third parties,  nor shall a royalty be payable under this
Article 4 with  respect to  Licensed  Products  distributed  for use in research
and/or  development,  in  clinical  trials  or as  promotional  samples  if such
promotional samples are provided without charge.

         5.       Payments.

                  5.1 Payment  Method.  All payments due hereunder shall be made
in  U.S.  dollars,  and  shall  be made by bank  wire  transfer  in  immediately
available funds to an account designated by Ciba. Any payments that are not paid
on the date such  payments are due under this  Agreement  shall bear interest to
the extent  permitted  by  applicable  law at the prime rate as  reported by the
Chase  Manhattan  Bank,  New York,  New York,  on the date such  payment  is due
calculated on the number


                                       -5-






of days such payment is  delinquent.  This Section 5.1 shall in no way limit any
other remedies available to Ciba.

                  5.2 Currency  Conversion.  If any currency conversion shall be
required  in  connection  with the  calculation  of  royalties  hereunder,  such
conversion  shall be made using the selling  exchange rate for conversion of the
foreign  currency  into U.S.  dollars,  quoted for current  "sell"  transactions
reported in The Wall Street  Journal for the last  business  day of the calendar
quarter to which such payment pertains.

                  5.3 Restrictions on Payment.  To the extent and as long as the
laws and/or regulations in force in any country prohibit the payment, conversion
or remittance of the royalties as hereby  contemplated,  TherAtid's  obligations
under  Article 5 may be  discharged  by the  deposit  thereof to the  account of
TherAtid,  or its designee,  in any commercial bank or trust company selected by
Ciba located in such country;  provided, that no infraction of law or regulation
occurs in making such deposit. If due to restrictions or prohibitions imposed by
national or international  authority,  payments cannot be made as aforesaid, the
parties shall consult with a view to finding a prompt and  acceptable  solution,
and TherAtid will,  from time to time,  deposit such monies as Ciba may lawfully
direct, at no additional out-of-pocket expense to TherAtid.

                  5.4 Withholding Taxes. All royalty amounts required to be paid
to Ciba pursuant to this  Agreement may be paid with  deduction for  withholding
for or on account of any taxes  (other than taxes  imposed on or measured by net
income) or similar governmental charge imposed by a juris diction other than the
United States ("Withholding  Taxes") to the extent Ciba or its successor has the
lawful  right to utilize  the  Withholding  Taxes paid by  TherAtid  as a credit
against Ciba's regular tax liability.  TherAtid shall provide Ciba a certificate
evidencing payment of any Withholding Taxes hereunder.

         6.       Reports and Records.

                  6.1 Royalty  Reports.  TherAtid  shall  deliver to Ciba [*] in
which  Licensed  Products are sold a written  report setting forth in reasonable
detail, on a country-by-country and Licensed  Product-by-Licensed Product basis,
the  calculation  of the royalties  payable to Ciba for such [*],  including the
Licensed Products sold in each country,  the Net Sales thereof,  and all amounts
received from sublicensees for sales of Licensed Products. Such reports shall be
Confidential Information of TherAtid subject to Article 8 herein.

                  6.2  Inspection  of  Books  and  Records.   TherAtid  and  its
sublicensees  shall  maintain  accurate  books  and  records  which  enable  the
calculation of royalties payable hereunder to be verified. TherAtid shall retain
the books  and  records  for each [*]  period  for  three  (3)  years  after the
submission of the  corresponding  report under  Section 6.1 hereof.  Upon thirty
(30) days prior notice to TherAtid and the  pertinent  sublicensee,  independent
accountants selected by Ciba, reasonably acceptable to TherAtid,  after entering
into a confidentiality agreement with TherAtid, may have access to the books and
records of TherAtid and its  sublicensees  to conduct a review or audit once per
calendar  year,  for the sole  purpose of verifying  the accuracy of  TherAtid's
payments and


                                       -6-






compliance  with this  Agreement.  The accounting firm shall report to Ciba only
whether there has been a royalty  underpayment  and, if so, the amount  thereof.
Such access shall be permitted  during  TherAtid's  normal business hours during
the  term of this  Agreement  and for two (2)  years  after  the  expiration  or
termination of this  Agreement.  Any such inspection or audit shall be at Ciba's
expense,  however, in the event an inspection reveals underpayment of [*] in any
audit period, TherAtid shall pay the costs of the inspection and promptly pay to
Ciba any  underpayment  with interest from the date such  amount(s) were due, at
the prime rate reported by the Chase Manhattan Bank, New York, New York.


         7.       Diligence.

                  7.1  Reasonable  Efforts.  TherAtid  agrees to use  reasonable
efforts  consistent with its prudent business judgment to diligently develop and
commercialize  the Patent  Rights and obtain such  approvals as may be necessary
for the sale of the  Licensed  Products  in the  United  States  and such  other
worldwide  markets as TherAtid elects to  commercialize  the Licensed  Products.
TherAtid  shall notify Ciba within  thirty (30) days after the first  commercial
sale of each Licensed Product.

                  7.2 Sublicense to Ciba. In the event that TherAtid  elects not
to commercialize  Licensed Products in a particular  country itself or through a
sublicensee  or a  distributor,  it shall notify Ciba.  In such event,  TherAtid
shall  negotiate a sublicense  with Ciba under the Patent  Rights and KnowHow in
such country on reasonable  terms  customary in the industry to be negotiated in
good faith by the parties.

         8.       Confidentiality; Publications.

                  8.1  Confidential  Information.   Unless  otherwise  expressly
provided for in this  Agreement,  both parties shall treat as  confidential  any
Know-How and any and all other  information  and data  received or derived under
this   Agreement   from  the  other  party  and  designated  as  proprietary  or
confidential at the time of disclosure ("Confidential  Information"),  and shall
not disclose any Confidential  Information  received from the other party to any
third  party  during the  Agreement  Period  and for five (5) years  thereafter,
except for information which:

                           (a) was  known to the  receiving  party  prior to the
disclosure by the other party as evidenced by written record or other proof;

                           (b) has become public  knowledge  through no fault of
the receiving party;

                           (c) has been  received from a third party who did not
acquire it directly or indirectly from the disclosing party;

                           (d)  was  independently  developed  by the  receiving
party prior to receipt from the disclosing  party,  as shown by  contemporaneous
written documentation;


                                       -7-






                           (e) needs to be disclosed to government officials for
purposes of obtaining registration of the Products; or

                           (f) is  compelled  to be  disclosed  in the course of
litigation  by a third  party,  provided  that the party  compelled to make such
disclosure  provides  the  other  party to this  Agreement  with  notice of such
compulsion  sufficiently  in advance of  disclosure  so as to provide such other
party a reasonable time period to seek a protective order.

                  8.2 Use and Disclosures.  Notwithstanding the above,  TherAtid
may  disclose  Confidential   Information  of  the  other  (i)  to  their  legal
representatives  and employees,  to  Affiliates,  to legal  representatives  and
employees of Affiliates,  and to  consultants,  to the extent such disclosure is
reasonably  necessary  to achieve the purposes of this  Agreement,  and provided
such  representatives,  employees and  consultants are covered by obligations of
confidentiality  with respect to such  information  no less stringent than those
set forth  herein;  (ii) in  connection  with the filing  and  support of patent
applications; (iii) as required by law or to comply with applicable governmental
regulations  or court  order or  otherwise  submit  information  to tax or other
governmental  authorities,  including the FDA and its foreign  counterparts,  or
(iv) to a sublicensee,  in confidence, in connection with a sublicense permitted
under this  Agreement;  provided  that if a party is  required  to make any such
disclosure of another party's Confidential Information, other than pursuant to a
confidentiality  agreement,  it will give reasonable advance notice to the other
party of such  disclosure and, save to the extent  inappropriate  in the case of
patent applications, will use its reasonable best efforts to secure confidential
treatment of such information in consultation  with the other party prior to its
disclosure  (whether through  protective  orders or otherwise) and disclose only
the minimum necessary to comply with such requirements.

                  8.3  Non-Disclosure.  The  existence  and  the  terms  of this
Agreement  shall not be  disclosed  by TherAtid or Ciba to any third party or be
published unless both parties expressly agree otherwise in writing.  The text of
any press release to be issued by TherAtid and/or Ciba concerning this Agreement
as well as the  precise  date and  timing of the press  release  shall be agreed
between the Parties in writing in advance, such agreement not to be unreasonably
withheld or delayed.  However, this restriction shall not apply to disclosure of
information  set forth in the form of an agreed  press  release,  which  will be
prepared in mutually  agreeable  format and  substance  following the closing of
this Agreement,  and to announcements  required by law or regulation except that
in such event the parties shall  coordinate to the extent  possible with respect
to the working of any such  announcement.  This  restriction  shall not apply to
disclosure  of this  Agreement  to certain  private  third  parties  such as the
shareholders of TherAtid,  investment bankers,  attorneys and other professional
consultants, and prospective investors in TherAtid.


                                       -8-






         9.       [*]

                  In the event [*] elects to [*] any Licensed  Product [*] shall
notify  [*]  and [*]  shall  [*]  such  Licensed  Product  [*] on  agreed  terms
reasonable and customary in the industry.  In such case, [*] shall have [*] from
the date it receives such written notice from [*] in which to notify [*] whether
[*] wishes [*]. After the expiration of such [*] period,  or any mutually agreed
upon extension thereof,  if, [*], the parties have [*] with respect to [*] shall
[*] with regard to such Licensed Product [*].

         10.      [*]

                  10.1 [*].  Within [*] from the Effective  Date,  [*] agrees to
deliver to [*] at no additional cost, [*] of such [*].

                  10.2  [*].  In  the  event  that  [*]  wishes  to  develop  or
commercialize  a  Licensed  Product  [*]  and  is  unable  [*]  on  commercially
reasonable  terms [*] request,  [*] agrees during the term of this  Agreement at
its discretion either (i) subject to Section [*] all Know-How  necessary [*]; or
(ii) to provide [*] with their  requirements of [*] at a transfer price equal to
[*] as  determined  in  accordance  with GAAP plus a  reasonable  profit  margin
customary in the trade.  In the event [*]  pursuant to option (ii)  hereof,  the
parties shall promptly enter into a [*] consistent with the preceding terms.

                  10.3  [*].  In  the  event  that  [*]  wishes  to  develop  or
commercialize  a  Licensed  Product  [*]  and  is  unable  [*]  on  commercially
reasonable  terms [*] request,  [*] agrees during the term of this  Agreement at
its discretion either (i) subject to Section [*] all Know-How  necessary [*]; or
(ii) to provide [*] with their  requirements of [*] at a transfer price equal to
[*], as  determined  in  accordance  with GAAP plus a reasonable  profit  margin
customary in the trade.  In the event [*]  pursuant to option (ii)  hereof,  the
parties shall promptly enter into a [*] consistent with the preceding terms.

                  10.4 [*].  In the event  that [*]  elects to [*]  pursuant  to
either Section [*] shall provide [*] with at least [*], and shall deliver to [*]
all  Know-How  relating to the [*] at least [*] prior to the date that [*] shall
cease to provide the applicable [*]. In such event, the parties shall assist and
cooperate  with  each  other  in  order  that  [*] may  initiate  [*] as soon as
practicable,  and shall take such  actions as are  appropriate  to achieve  such
goal.

         11.      Representations and Warranties.

                  11.1  Ciba   represents   and  warrants  that:  (i)  it  is  a
corporation duly organized  validly existing and in good standing under the laws
of Switzerland;  (ii) the execution,  delivery and performance of this Agreement
have been duly authorized by all necessary corporate action on the part of Ciba;
(iii) Ciba and Ciba-Geigy  Corporation are the sole and exclusive  owners of all
right,  title and interest in the Patent Rights and the Know-How;  (iv) Ciba has
the fight to grant the rights and licenses granted herein; (v) the Patent Rights
and Know-How are free and clear of any lien,


                                       -9-






encumbrance,  security  interest  or  restriction  on  license;  (vi) it has not
previously  granted,  and will not grant during the term of this Agreement,  any
right,  license or  interest  in or to the  Patent  Rights or  Know-How,  or any
portion thereof, inconsistent with the license granted to TherAtid herein; (vii)
there are no threatened or pending  actions,  suits,  investigations,  claims or
proceedings in any way relating to the Patent Rights or Know-How; and (viii) the
practice  by  TherAtid  or its  sublicensees  of the Patent  Rights or  Know-How
licensed  herein  does not and shall not  require a license,  additional  to the
license  hereby  granted,   under  any  other  intellectual  property  owned  or
controlled by Ciba or its Affiliates.

                  11.2 TherAtid.  TherAtid  represents and warrants that: (i) it
is a corporation duly organized  validly existing and in good standing under the
laws  of  the  State  of  California;  and  (ii)  the  execution,  delivery  and
performance  of this  Agreement  have  been  duly  authorized  by all  necessary
corporate action on the part of TherAtid.

         12.      Patent Prosecution and Enforcement.

                  12.1 Ciba's Responsibilities. Ciba shall, at its sole expense,
have the  initial  right and  obligation  to control  the  preparation,  filing,
prosecution  and  maintenance  of the  Patent  Rights,  and  any  interferences,
re-examinations,  reissues and oppositions  proceeding  relating thereto,  using
patent  counsel of its choice.  Ciba shall consult with  TherAtid  regarding the
conduct of all such activities,  by providing TherAtid a reasonable  opportunity
to review and comment on all proposed  submissions  to any patent  office before
submittal,  and  provided  further  that Ciba  shall  keep  TherAtid  reasonably
informed as to the status of such  patent  applications  by  promptly  providing
TherAtid copies of all communications  relating to such patent applications that
are received from any patent office.

                  12.2 Ciba Failure to Prosecute.  Ciba may elect on ninety (90)
days  prior  notice  to  TherAtid  to  discontinue  prosecution  of  any  patent
applications  within the Patent  Rights or the  conduct of any  activities  with
respect to the patent  applications  or patents subject to Section 12. 1. In the
event  Ciba  declines  to file or having  filed  fails to further  prosecute  or
maintain  any patent  applications  or patents,  or conduct  any  interferences,
re-examinations,  reissues or oppositions, then TherAtid shall have the right to
prepare,  file,  prosecute and maintain such patent  applications and patents in
such countries worldwide it deems appropriate, and conduct any interferences, re
examinations,  reissues or oppositions, at its sole expense using patent counsel
of its choice. TherAtid may credit any expenses incurred in connection with such
activities  set  forth in this  Section  12.2  against  any  royalties  due Ciba
pursuant to Article 4.

                  12.3 Copies.  Upon request by  TherAtid,  Ciba shall  promptly
provide to TherAtid a copy of any patent  applications  within the Patent Rights
filed  by Ciba or its  Affiliates  during  the  term of this  Agreement  and all
material  documents  received from or sent to any patent office relating thereto
which relate to the scope, term, maintenance,  validity or enforceability of any
of the Patent Rights, or any challenge to or change to any of the preceding.

                  12.4  Enforcement.  If either  party  becomes  aware  that any
Patent  Rights are being or have been  infringed by any third party,  such party
shall promptly notify the other party hereto in



                                      -10-







writing describing the facts relating thereto in reasonable  detail.  Ciba shall
have the initial  right,  but not the  obligation,  to institute,  prosecute and
control  any action,  suit or  proceeding  (an  "Action")  with  respect to such
infringement,  including any declaratory judgment action, at its expense,  using
counsel of its choice.  In the event Ciba fails to initiate or defend any Action
involving the Patent  Rights  within one hundred  eighty (180) days of receiving
notice of any alleged  infringement,  TherAtid shall have the fight, but not the
obligation,  to initiate  and control such an Action,  and Ciba shall  cooperate
with TherAtid in connection with any such Action.  Any amounts recovered in such
Action  shall be used  first to  reimburse  TherAtid  and Ciba for any costs and
expenses  incurred in  connection  with such Action  (including  attorneys'  and
experts'  reasonable  fees),  and any  remainder  shall be divided  between  the
parties with Ciba receiving [*] and TherAtid [*].

                  12.5 Third Party  Royalty  Offset.  In the event that TherAtid
enters  into a  license  agreement  with  any  third  party  with  respect  to a
Dominating   Patent  or  to  avoid  or  settle  a  claim  of   infringement   or
misappropriation of any intellectual property fight made by such third party due
to TherAtid's  practice of the Patent  Rights,  TherAtid may offset any payments
made in accordance  with such license  agreements  against any amounts owed Ciba
pursuant to Article 4 hereof, up to a [*] of the amounts due thereunder.

                  12.6 Patent Term Extensions. With respect to any patent within
the Patent Rights, Ciba will designate TherAtid or its designee as its agent for
obtaining an extension of such patent or governmental  equivalent  which extends
the  exclusivity  of any of the patent  subject  matter  where  available in any
country in the world or if not feasible,  at TherAtid's option,  permit TherAtid
to file in Ciba's name or diligently  obtain such  extension for TherAtid or its
sublicensee(s),  at TherAtid's  expense.  Furthermore,  Ciba and its  Affiliates
agree  to  provide  reasonable   assistance  to  facilitate  TherAtid's  or  its
sublicensees' efforts to obtain any extension.

         13.      Arbitration.

                  Ciba and  TherAtid  agree  that  any  dispute  or  controversy
arising out of, in relation to, or in  connection  with this  Agreement,  or the
validity, enforceability,  construction, performance or breach thereof, shall be
settled by binding  arbitration in New York, New York, United States of America,
under the  then-current  Licensing  Agreement Rules of the American  Arbitration
Association by one (1) arbitrator  appointed in accordance with such Rules.  The
arbitrators  shall  determine  what  discovery  will be permitted,  based on the
principle  of  limiting  the cost and time  which  the  parties  must  expend on
discovery;  provided,  the arbitrators  shall permit such discovery as they deem
necessary to achieve an equitable  resolution of the dispute.  Such  proceedings
shall be conducted in English, and any written evidence originally in a language
other than English shall be submitted in an English  translation  accompanied by
the original or a true copy thereof.  The decision  and/or award rendered by the
arbitrator shall be written,  final and non-appealable and may be entered in any
court of competent jurisdiction. In the event that in any arbitration instituted
pursuant  to  Section  15.2,  the  arbitrator  determines  that there has been a
material breach of the Agreement,  at the option of the non breaching party, the
arbitrator shall direct that the Agreement be terminated effective  immediately.
The parties agree that,  any provision of applicable law  notwithstanding,  they
will not request, and the arbitrator shall have no authority to award,  punitive
or exemplary damages against any party. The


                                      -11-





costs  of  any  arbitration,  including  administrative  fees  and  fees  of the
arbitrator,  shall be shared  equally by the parties.  Each party shall bear the
cost of its own attorneys' fees and expert fees.

         14.      Indemnification.

                  14.1  TherAtid.  TherAtid  shall  indemnify,  defend  and hold
harmless Ciba and its  directors,  officers,  employees and agents (each a "Ciba
Indemnitee") from and against any and all liabilities, damages, losses, costs or
expenses  (including  reasonable  attorneys  and  professional  fees  and  other
expenses of litigation  and/or  arbitration) (a "Liability")  resulting from any
claim,  suit or proceeding  brought by a third party against a Ciba  Indemnitee,
arising out of or in connection with (i) any  misrepresentation  with regard to,
or breach of any of the  representations and warranties of TherAtid set forth in
Section 11.2, or (ii) the development,  manufacture, use, sale or consumption of
any  Licensed  Product by  TherAtid  or its  sublicensees,  except to the extent
caused by the negligence or willful misconduct of Ciba.

                  14.2 Ciba.  Ciba  shall  indemnify,  defend and hold  harmless
TherAtid and its  directors,  officers,  employees  and agents (each a "TherAtid
Indemnitee") from and against any and all liabilities, damages, losses, costs or
expenses  (including  reasonable  attorneys'  and  professional  fees and  other
expenses of litigation  and/or  arbitration) (a "Liability")  resulting from any
claim,  suit  or  proceeding  brought  by  a  third  party  against  a  TherAtid
Indemnitee,  arising out of or in  connection  with any  misrepresentation  with
regard to, or breach of any of, the  representations  and warranties of Ciba set
forth in Section 1.1.

                  14.3  Procedure.  In the event that any Indemnitee  intends to
claim  indemnification  under this Article 14 it shall promptly notify the other
party in writing of such alleged  Liability.  The indemnifying  party shall have
the right to  control  the  defense  thereof.  The  affected  Indemnitees  shall
cooperate fully with the indemnifying party and its legal representatives in the
investigation  and  conduct of any  Liability  covered by this  Article  14. The
Indemnitee  shall not, except at its own cost,  voluntarily  make any payment or
incur any expense  with  respect to any claim,  suit or  Liability,  or make any
admission of liability or attempt to settle any claim  without the prior written
consent of the  indemnifying  party,  which such party  shall not be required to
give.

         15.      Term and Termination.

                  15.1  The  term  of  this  Agreement  shall  commence  on  the
Effective  Date, and unless earlier  terminated as provided in Article 15, shall
continue  in full  force  and  effect  on a  country-by-  country  and  Licensed
Product-by-Licensed  Product basis until there are no remaining  royalty payment
obligations  in a  country,  at which  time the  Agreement  shall  expire in its
entirety in such country. Notwithstanding the above, upon the expiration of this
Agreement  in any country,  TherAtid  shall have a  non-exclusive,  irrevocable,
fully paid-up right and license to use and exploit the Know-How.

                  15.2 If either party materially  breaches this Agreement,  the
other party may elect to give the breaching party written notice  describing the
alleged  breach.  If the breaching  party has not cured such breach within sixty
(60) days after receipt of such notice, the notifying party will be


                                      -12-







entitled,  in addition to any other rights it may have under this Agreement,  to
terminate this Agreement  effective  immediately;  provided,  however, if either
party receives notification from the other of a material breach and if the party
alleged to be in default  notifies the other party in writing within thirty (30)
days of receipt of such default  notice that it disputes  the asserted  default,
the matter will be submitted to non-binding  mediation and no termination  shall
become effective prior to the completion of such mediation.

                  15.3  Termination for  Insolvency.  Either party may terminate
this  Agreement if the other  becomes the subject of a voluntary or  involuntary
petition in bankruptcy or any proceeding  relating to insolvency,  receivership,
liquidation,  or  composition  or the benefit of creditors,  if that petition or
proceeding is not dismissed with prejudice within sixty (60) days after filing.

                  15.4  Permissive  Termination.  TherAtid  may  terminate  this
Agreement with respect to any country or any patent application or patent within
the Patent rights with sixty (60) days written notice to Ciba.

                  15.5     Effect of Termination.

                           (a) Accrued  Rights and  Obligations.  Termination of
this  Agreement  for any reason  shall not  release  any party  hereto  from any
liability  which,  at the time of such  termination,  has already accrued to the
other party or which is attributable to a period prior to such termination,  nor
preclude  either  party  from  pursuing  any  rights  and  remedies  it may have
hereunder  or at law or in equity  which  accrued  or are  based  upon any event
occurring prior to such termination.

                           (b) Return of Materials. Upon any termination of this
Agreement,  each party shall promptly return to the other party all Confidential
Information  received  from the  other  party  (except  one copy of which may be
retained for archival purposes).

                           (c) Stock on Hand.  In the event  this  Agreement  is
terminated for any reason,  TherAtid and its Affiliates and  sublicensees  shall
have the right to sell or otherwise dispose of the stock of any Licensed Product
subject to this Agreement then on hand, subject to Articles 4 and 5.

                           (d) Sublicensees.  In the event of any termination of
this  Agreement any  sublicensees  granted by TherAtid shall remain in force and
effect and shall be assigned by TherAtid to Ciba,  provided,  however,  that the
financial terms of such sublicenses  shall be no less favorable to Ciba than the
terms of this Agreement.

                  15.6  Survival.  Sections 15.5 and 15.6, and Articles 5, 6, 8,
9,  11,  13,  14 and 16 of this  Agreement  shall  survive  termination  of this
Agreement for any reason.


                                      -13-






         16.      Miscellaneous.

                  16.1 Governing  Law. This  Agreement  shall be governed by and
construed  in  accordance  with  the  laws of the  State  of New  York,  without
reference to principles of conflicts of laws.

                  16.2 Independent Contractors.  The relationship of the parties
hereto is that of independent contractors.  The parties hereto are not deemed to
be agents, partners or joint venturers of the others for any purpose as a result
of this Agreement or the transactions contemplated thereby.

                  16.3  Assignment.  Neither party may assign this  Agreement or
the supply  agreement  without  the prior  written  consent of the other,  which
consent shall not be  unreasonably  withheld;  provided,  however,  TherAtid may
assign this Agreement in connection with a transfer of all or substantially  all
of its assets relating to the agreements,  whether by sale, merger, operation of
law or otherwise.  This Agreement shall be binding upon and inure to the benefit
of the parties and their successors and assigns.

                  16.4 Right to Develop Independently. Nothing in this Agreement
will impair  TherAtid's right to  independently  acquire,  license,  develop for
itself,  or have others  develop for it,  intellectual  property and  technology
performing similar functions as the Patent Rights and Know- How or to market and
distribute  Licensed  Products  based on such other  intellectual  property  and
technology.

                  16.5 Notices. Any required notices hereunder shall be given in
writing by certified mail or overnight  express  delivery service at the address
of each party  below,  or to such other  address as either party may indicate on
its behalf by written  notice.  Notice shall be deemed served when delivered or,
if delivery is not  accomplished by reason or some fault of the addressee,  when
tendered.

                  If to Ciba:               Ciba-Geigy Limited
                                            Pharma Licensing
                                            Klybeckstrasse 141
                                            4002 Basel
                                            Switzerland
                                            Attention:

                  If to TherAtid:           TherAtid, Incorporated
                                            828 Eastbrook Court
                                            Danville, California 94506-1206
                                            Attention: Chief Executive Officer

                  16.6  Force  Majeure.  Neither  party  shall  lose any  rights
hereunder  or be liable to the other  party for  damages or losses  (except  for
payment  obligations)  on account of failure of  performance  by the  defaulting
party if the failure is occasioned by war, strike, fire, Act of God, earthquake,
flood, lockout, embargo, governmental acts or orders or restrictions, failure of
suppliers,

                                      -14-






or any other reason where  failure to perform is beyond the  reasonable  control
and not  caused by the  negligence,  intentional  conduct or  misconduct  of the
nonperforming  party and the  nonperforming  party has  exerted  all  reasonable
efforts to avoid or remedy such force  majeure;  provided,  however,  that in no
event shall a party be required to settle any labor dispute or disturbance.

                  16.7  Compliance  with Laws.  Each party shall  furnish to the
other  party any  information  related to the subject  matter of this  Agreement
requested  or required by that party  during the term of this  Agreement  or any
extensions  hereof to enable that party to comply with the  requirements  of any
U.S. or foreign federal state and/or government agency.

                  16.8 LIMITATION OF LIABILITY. NEITHER PARTY SHALL BE LIABLE TO
THE OTHER FOR ANY SPECIAL, CONSEQUENTIAL, INCIDENTAL OR INDIRECT DAMAGES ARISING
OUT OF THE  PERFORMANCE OF THIS AGREEMENT,  HOWEVER CAUSED,  UNDER ANY THEORY OF
LIABILITY.

                  16.9 Further  Assurances.  At any time or from time to time on
and after the date of this Agreement,  Ciba shall at the request of TherAtid (i)
deliver to TherAtid such records,  data or other  documents  consistent with the
provisions  of  this  Agreement,  (ii)  execute,  and  deliver  or  cause  to be
delivered,  all such consents,  documents or further  instruments of transfer or
license,  and (iii) take or cause to be taken all such actions,  as TherAtid may
reasonably  deem necessary or desirable in order for TherAtid to obtain the full
benefits of this Agreement and the transactions contemplated hereby.

                  16.10  Severability.  In the event that any provisions of this
Agreement are determined to be invalid or  unenforceable by a court of competent
jurisdiction,  the  remainder  of the  Agreement  shall remain in full force and
effect  without  said  provision.  The parties  shall in good faith  negotiate a
substitute  clause for any provision  declared invalid or  unenforceable,  which
shall most  nearly  approximate  the  intent of the  parties  in  entering  this
Agreement;  provided,  if the parties  are unable to agree on such a  substitute
clause and the deletion of the  provision  held invalid or  unenforceable  would
produce material adverse financial  consequences for one party, such party shall
have the fight to terminate  the  Agreement  with one hundred  eighty (180) days
notice.

                  16.11 Waiver.  The failure of a party to enforce any provision
of the  Agreement  shall  not be  construed  to be a waiver of the right of such
party to thereafter enforce that provision or any other provision or right.

                  16.12 Entire Agreement;  Amendment.  This Agreement including,
its Exhibits,  sets forth the entire agreement and  understanding of the parties
with respect to the subject matter hereof, and supersedes all prior discussions,
agreements and writings in relating thereto.  This Agreement may not be altered,
amended or modified in any way except by a writing signed by both parties.

                  16.13  Counterparts.  This  Agreement  may be  executed in two
counterparts, each of which shall be deemed an original and which together shall
constitute one instrument.


                                      -15-






         IN WITNESS  WHEREOF,  Ciba and TherAtid have executed this Agreement by
their respective duty authorized representatives.


CIBA-GEIGY LIMITED                             THERATID, INCORPORATED


By: /s/ DR. E. SCHWEIZER                       By: /s/ ANTHONY E. MAIDA III
   -----------------------------------            ------------------------------
Print Name: Dr. E. Schweizer                   Print Name: Anthony E. Maida III
           ---------------------------                    ----------------------
Title: Chief Scientific and Technical          Title: Chief Executive Officer
      --------------------------------               ---------------------------
       Adviser


By: /s/ R.E. WALKER
   -------------------------
Print Name: R.E. Walker
           -----------------
Title: Division Counsel
      ----------------------


EXHIBIT A: PATENT RIGHTS


                                      -16-








                                    EXHIBIT A

                                     Part I

                             Patents relating to [*]








                    Appendix A: Patent rights by Case 4-12450
                    -----------------------------------------



Country                      Patent No.                     Patent Expiry
- -------                      ----------                     -------------
[*]                          [*]                            [*]
Austria                      25495                          July 25, 2000
Australia                    541147                         July 25, 2000
Belgium                      25495                          July 25, 2000
Bermuda                      28                             July 25, 2000
Canada                       1183129                        Feb. 26, 2002
Cyprus                       1381                           July 25, 2000
Czech Republic               276965                         July 25, 2000
Denmark                      161025                         July 25, 2000
Germany                      25495                          July 25, 2000
Finland                      75578                          July 21, 2000
France                       25495                          July 25, 2000
Great Britain                25495                          July 25, 2000
Hong Kong                    857/87                         July 25, 2000
Hungary                      188861                         July 24, 2000
Ireland                      50145                          July 24, 2000
Israel                       60676                          July 24, 2000
Italy                        25495                          July 25, 2000
Japan                        1507734                        July 25, 2000
Kenya                        P3723                          July 25, 2000
Luxembourg                   25495                          July 25, 2000
Malaya                       554/87                         July 25, 2000
[*]                          [*]                            [*]
Netherlands                  25495                          July 25, 2000
New Zealand                  194432                         July 24, 2000
Norway                       157177                         July 22, 2000
Portugal                     71607                          June 4, 1996
Russia                       1277905                        July 24, 2000
Russia                       1277906                        July 24, 2000
Sabah                        405/87                         July 25, 2000
Sarawak                      3237                           July 25, 2000
Singapore                    381/87                         July 25, 2000
South Africa                 4487/80                        July 24, 2000
Spain                        493633                         Oct. 27, 2000
Sweden                       25495                          July 25, 2000
Switzerland                  25495                          July 25, 2000
USA                          4406890                        Sept. 27, 2000
Venezuela                    49953                          April 29, 2002








                    Appendix B: Patent rights by Case 4-14026
                    -----------------------------------------


Country                     Patent No.                    Patent Expiry
- -------                     ----------                    -------------
Australia                   566879                        July 22, 2003
Belgium                     897359                        July 25, 2003
France                      102319                        July 18, 2003
Great Britain               102319                        July 18, 2003
Hong Kong                   798/90                        July 18, 2003
Ireland                     55793                         July 22, 2003
Israel                      69294                         July 21, 2003
Italy                       1168778                       July 22, 2003
Luxembourg                  102319                        July 18, 2003
Netherlands                 102319                        July 18, 2003
New Zealand                 205000                        July 22, 2003
[*]                         [*]                           [*]
Singapore                   779/89                        July 18, 2003
South Africa                5360/83                       July 22, 2003
Sweden                      102319                        July 18, 2003
Switzerland                 102319                        July 18, 2003
USA                         5189017                       Feb. 23, 2010
USA                         5334583                       Feb. 23, 2010







                    Appendix C: Patent rights by Case 4-15115
                    -----------------------------------------


Country                     Patent No.                    Patent Expiry
- -------                     ----------                    -------------
Austria                     178624                        Oct. 14, 2005
Australia                   590221                        Oct. 15, 2005
Belgium                     178624                        Oct. 14, 2005
[*]                         [*]                           [*]
Canada                      1260393                       Sept. 26, 2006
Denmark                     165220                        Oct. 15, 2005
Germany                     178624                        Oct. 14, 2005
Finland                     86371                         Oct. 14, 2005
France                      178624                        Oct. 14, 2005
Gibraltar                   389                           Oct. 14, 2005
Great Britain               178624                        Oct. 14, 2005
Greece                      852492                        Oct. 15, 2000
Hong Kong                   1357/94                       Oct. 14, 2005
Hungary                     198128                        Oct. 15, 2005
Ireland                     58143                         Oct. 14, 2005
Israel                      76700                         Oct. 14, 2005
Italy                       178624                        Oct. 14, 2005
[*]                         [*]                           [*]
Japan                       1897352                       Oct. 16, 2005
[*]                         [*]                           [*]
Korea (South)               28375                         Oct. 16, 2000
Luxembourg                  178624                        Oct. 14, 2005
Netherlands                 178624                        Oct. 14, 2005
New Zealand                 213828                        Oct. 15, 2005
Norway                      171443                        Oct. 15, 2005
Pakistan                    129986                        Oct. 10, 2001
Philippines                 22978                         Feb. 24, 2006
Portugal                    81298                         Aug. 31, 2002
Singapore                   898/93                        Oct. 14, 2005
South Africa                7888/85                       Oct. 15, 2005
Spain                       547889                        Aug. 26, 2006
Sweden                      178624                        Oct. 14, 2005
Switzerland                 178624                        Oct. 14, 2005
Taiwan                      25805                         Oct. 15, 2001
USA                         4971802                       Nov. 20, 2007









                    Appendix D: Patent rights by Case 4-16897
                    -----------------------------------------


Country                      Patent No.                       Patent Expiry
- -------                      ----------                       -------------
Australia                    623876                           Jan. 31, 2009
Austria                      329609                           Feb. 6, 2009
Belgium                      329609                           Feb. 6, 2009
Canada                       1336578                          Aug. 8, 2012
[*]                          [*]                              [*]
France                       329609                           Feb. 6, 2009
Germany                      329609                           Feb. 6, 2009
Great Britain                329609                           Feb. 10, 2009
Ireland                      63493                            Feb. 10, 2009
Israel                       89248                            Feb. 10, 2009
Italy                        329609                           Feb. 6, 2009
[*]                          [*]                              [*]
[*]                          [*]                              [*]
Luxembourg                   329609                           Feb. 6, 2009
Netherlands                  329609                           Feb. 6, 2009
New Zealand                  227944                           Feb. 10, 2009
Philippines                  26919                            Dec. 3, 2009
South Africa                 1053/89                          Feb. 10, 2009
Sweden                       329609                           Feb. 6, 2009
Switzerland                  329609                           Feb. 6, 2009
USA                          5137720                          Aug. 11, 2009







                    Appendix E: Patent Rights by Case 4-17454
                    -----------------------------------------


Country                      Patent No.                       Patent Expiry
USA                          4,994,440                        Feb. 13, 2009



Note:  Ciba-Geigy  Corporation had a Research  Collaboration  Agreement with the
Roswell Park  Memorial  Institute  which it has not been possible to track down,
and consequently although the above-mentioned  patent is in the name of Ciba, it
may be that,  in line with other  Agreements  between  Ciba,  the  Roswell  Park
Memorial  Institute and Health Research,  Inc. concluded at about the same time,
some  royalty  payment  of the order of 1% to 5%  (taking  into  account  either
party's  contribution to the development)  would have to be made to Roswell Park
for exploitation of this patent for the indication of renal cell carcinoma,  the
precise amount to be negotiated prior to commercialization.










                                    EXHIBIT A

                                     Part II

                             Patents relating to [*]






                    Appendix A: Patent rights by Case 4-18903
 (based on Swiss priority patent application no. 3776/91-2, filed Dec. 19, 1991)


Country                        Patent No.                 Patent Expiry
- -------                        ----------                 -------------
[*]                            [*]                        [*]
New Zealand                    245507                     Dec. 17, 2012
Portugal                       548024                     Dec. 11, 2012
[*]                            [*]                        [*]
South Africa                   9831/92                    Dec. 18, 2012
[*]                            [*]                        [*]
USA                            5342977                    Dec. 17, 2012







                                                                    EXHIBIT 10.6



                                LICENSE AGREEMENT
                                -----------------


         THIS  Agreement  is  effective  as of this  15th day of June  1994 (the
"Effective Date"),  between ELI LILLY AND COMPANY, an Indiana corporation having
its principal  offices at Lilly Corporate  Center,  Indianapolis,  Indiana 46285
(Lilly)

                                       AND

         JENNER  TECHNOLOGIES,  a California  corporation  having its  principal
offices at 1895 Mountain View Drive, Tiburon, CA 94920 (Jenner).

                                    RECITALS
                                    --------
         1. Jenner  desires to obtain a  co-exclusive  license under Lilly owned
Patent Rights covering genes encoding the human KS1/4 antigen (KSA).

         2. Jenner also desires to obtain a non-exclusive license to Lilly owned
Biological  Materials useful in conducting  research and development of products
based on KSA.

         3. Lilly is willing to grant such a license to Jenner,  under the terms
and conditions set forth below.

         NOW THEREFORE,  in  consideration  of the promises and mutual covenants
contained herein, Lilly and Jenner agree as follows:

                                    Article I
                                   Definitions
                                   -----------
         1.1 General.  When used in this Agreement,  each of the following terms
shall have the meanings set out in this Article I.

         1.2  "Affiliate"  means  any  person  or  entity  which,   directly  or
indirectly,  owns or controls Jenner,  or which is controlled by or under common
control  with  Jenner.  For  purposes  of this  definition  "control"  means the
ownership,  directly  or  indirectly,  of  fifty  percent  (50%)  or more of the
outstanding equity securities of a corporation  entitled to vote in the election
of directors or a fifty percent  (50%) or greater  interest in the net assets or
profits of an entity which is not a corporation.

         1.3      "Biological Material(s)" means [*].

         1.4      "Co-exclusive" means restricted to Jenner and Lilly.

         1.5 "Know-How"  means any information or technical data that relates to
subject matter of the Patent Rights.


                                      -1-






         1.6 "Net  Sales"  means the amount  received  for sales of  Products by
Jenner,  or its licensees or affiliates,  to an unrelated third party,  less all
allowances  for  discounts,  rebates,  credits,  retroactive  price  reductions,
returns,  distribution  expenses or allowances,  and the value  attributable  to
other than normal delivery systems and any tax imposed on the production,  sale,
delivery or use of the Product(s).

         1.7 "Patent  Rights" means the invention  that forms the subject matter
of  U.S.   Patent   Application   Serial  No.  [*],   including  all  divisions,
substitutions,  continuations,  continuations-in-part (CIP) applications thereof
(excluding any new matter in CIP applications  filed after the Effective Date of
this  Agreement),  any and all  U.S.  patents,  reissues,  re-examinations,  and
extensions  issuing  on any of the  preceding,  and any  and  all  corresponding
foreign patent applications and patents of any of the preceding.

         1.8  "Product(s)"  means any formulation or composition that contains a
protein encoded or produced by, or produced using the DNA compounds, vectors, or
methods claimed under the Patent Rights.

         1.9 "Valid  Claim" means a claim of an unexpired  issued  patent within
the  Patent  Rights  which  has not been held  invalid  or  unenforceable  in an
unappealed  or   unappealable   decision   rendered  by  a  court  of  competent
jurisdiction.

                                   Article II
                             Rights and Obligations
                             ----------------------
         2.1 Grant.  Lilly hereby grants to Jenner a worldwide license under the
Patent Rights and  Biological  Materials,  with the right to grant and authorize
sublicenses, to make, have made, use and sell Products.

         2.2  Exclusivity.  Jenner's  license  under  this  Agreement  shall  be
co-exclusive  with Lilly's rights with respect to the Patent  Rights;  provided,
however, Lilly shall not have the right to authorize or grant sublicenses to the
Patent  Rights  while  Jenner  shall  have the  right  to  authorize  and  grant
sublicenses  to any and all rights herein  granted to Jenner.  Jenner's  license
under  this  Agreement  with  respect  to  the  Biological  Materials  shall  be
non-exclusive.

         2.3  Territory.  Jenner's  license  under this  Agreement  shall  apply
world-wide.

         2.4 Transfer of Biological Material and Know-How.  Lilly shall promptly
transfer the  Biological  Materials  specified by Jenner upon  execution of this
Agreement,  or at such later time as may be agreed by the parties.  Lilly shall,
at Jenner's request,  provide Jenner with copies of all patent  applications and
patents  within the Patent  Rights and  information  regarding the status of any
patent application  and/or patent within the Patent Rights.  Except as expressly
provided  above,  Lilly shall have no obligation to provide Jenner any Know-How.
This  Agreement  shall not  obligate  Lilly to  transfer,  provide or supply any
Biological Material or Know-How to any of Jenner's sublicensees or Affiliates.


                                       -2-






         2.5  Jenner's  Diligence.  Jenner  agrees  to use  reasonable  efforts,
consistent  with its prudent  business  judgment,  to develop,  gain  regulatory
approval,  and market at least one Product.  The efforts required in furtherance
of this  Section 2.5 include an  obligation  to use  reasonable  efforts to seek
regulatory  approval from the U.S. FDA to perform  clinical trials with at least
one Product.

                                   Article III
                                    Payments
                                   -----------
         3.1 Royalties.  Jenner agrees to pay Lilly a running  royalty of [*] on
[*] by Jenner,  its sublicensees and Affiliates of Product(s) covered by a Valid
Claim in the country which such Product is made or sold.

         3.2 Royalty Term. Payments due under this Article 3 shall be payable on
a  country-by-  country  basis until the  expiration of the last to expire Valid
Claim covering the Products in such country.

         3.3 One  Royalty.  No more than one royalty  payment  shall be due with
respect  to a sale of a  particular  Product.  No  multiple  royalties  shall be
payable because any Product, or its manufacture,  use or sale is covered by more
than one claim within the Patent Rights.  No royalty shall be payable under this
Article 3 with  respect  to  Products  distributed  for use in  research  and/or
development, in clinical trials or as promotional samples.

         3.4 Sales to Affiliates  and  Sublicenses.  No royalty shall be payable
under  this  Section 3 with  respect  to sales of  Products  among  Jenner,  its
Affiliates  and/or  sublicensees,  unless such parties are the end users of such
Products.  In the event any Product is sold to an Affiliate or  sublicensee  for
re-sale,  the royalties to be paid  hereunder  for such Products  shall be based
upon the Net Sales of such Products to a third party end-user.

         3.5 [*].  In the event that [*] is sold [*] which is not covered by the
[*] from such sales for purposes of  calculating  the amounts due under  Section
3.1 above shall be calculated [*]. In the event that no such [*] are made by [*]
for royalty  determination shall be as reasonably  allocated by [*] between such
[*], based upon their relative importance and proprietary protection.

         3.6 Milestone Payments. Jenner agrees to pay Lilly [*] of the following
events:

             [*]


         3.7  Notice.  Jenner  shall  promptly  notify  Lilly  upon the [*] with
respect  to the  first  Product  and upon  [*] of the  first  Product.  Jenner's
obligation to pay milestone (i) [*] shall arise upon the [*].

         3.8 Credits.  [*] due upon [*] of the first Product shall be creditable
against  royalties  payable to Lilly on Net Sales by Jenner or its Affiliates or
sublicensees pursuant to Section 3.1 herein.


                                       -3-







         3.9 [*] Fee.  Jenner  agrees to pay Lilly [*] of  receipt  by Jenner of
notification by Lilly of the issuance of the [*].

         3.10  Royalty  Payments.   Royalty  payments  shall  be  calculated  as
specified  in Section  3.1 once per  calendar  year and shall be paid within the
yearly quarter following such calculation.

         3.11  Non-Refundable.  All  payments  made  under any  Section  of this
Agreement shall be non-refundable.

                                   Article IV
                Warranties, Product Liability and Indemnification
                -------------------------------------------------

         4.1 Lilly Warranties.  Lilly warrants that (i) it has the right, and is
authorized,  to grant Jenner the rights  specified under Article II, (ii) it has
the right to enter into this Agreement, (iii) it is the sole owner of all right,
title and interest in the Patent Rights;  (iv) it has not previously granted and
during the term of this Agreement will not grant, any right, license or interest
in the Patent  Rights to any third party in conflict with the rights and license
granted to Jenner herein; and (v) there are no actions,  suits,  investigations,
claims or proceedings, pending or threatened, relating to the Patent Rights.

         4.2 Patents. Nothing in this Agreement shall be construed as a warranty
or  representation by Lilly as to the validity or scope of the Patent Rights, or
a warranty or  representation  by Lilly that anything made,  used, or sold under
this Agreement is or will be free from infringement of patents of third parties,
or a warranty or representation  that the Patent Rights or Product are useful or
safe for any purpose.

         4.3 Jenner  Liability.  Jenner  shall be  responsible  (liable) for all
claims,  including the cost of defending against such claims, fines,  penalties,
and product recalls  arising out of the sale or use of any Product  manufactured
by Jenner or its sublicensees and Affiliates. Jenner shall have Lilly designated
as a named insured in all insurance  policies issued to Jenner covering the sale
or use of  Product.  Further,  Jenner  shall  defend,  indemnify  and hold Lilly
harmless against all claims including, but not limited to, product liability and
related expenses for property damage or personal injury,  including death, which
arise out of the  manufacture,  sale or use of Products  manufactured by Jenner,
its sublicensees or Affiliates pursuant to this Agreement, regardless of whether
the claim is based in contract,  strict  liability,  warranty or any other legal
theory.  Jenner's  obligations  under this Section 4.3 shall only apply if Lilly
provides  Jenner  prompt  notice of any claim  subject to this  Section  4.3 and
cooperates  fully with  Jenner,  at Jenner's  request,  in  connection  with the
defense  thereof.  Jenner shall solely control the defense and settlement of any
such claim.

                                    Article V
                         Patent Prosecution and Defense
                         ------------------------------

         5.1 Patents.  Lilly shall diligently  prosecute and maintain all patent
applications  and patents  within the Patent Rights and keep Jenner  informed of
the status of such applications and patents. In


                                       -4-






the event  that Lilly  fails to  diligently  prosecute  or  maintain  any patent
application or patent within the Patent Rights,  or determines  that it will not
prosecute  or  maintain  any such  patent  application  or patent,  Lilly  shall
promptly  notify  Jenner,  and  Jenner  shall have the right to  prosecute  such
applications or maintain such patent(s) at its own expense, using counsel of its
choice;  provided,  however,  any  amounts  expended  by  Jenner  in  connection
therewith shall be fully creditable  against any amounts due Lilly under Article
3 hereunder.

         5.2 Infringement. Lilly shall not be obligated to enforce or defend any
patent  within the Patent  Rights  unless  specifically  requested in writing by
Jenner,  however,  Lilly shall promptly  notify Jenner of any legal actions that
could  compromise the validity or  enforceability  of any patent with the Patent
Rights. The parties hereto shall give the other prompt notice of any incident of
infringement  of  Patent  Rights  coming to its  attention.  The  parties  shall
thereupon  confer  together  as to what steps are to be taken to stop or prevent
such  infringement.  If  Lilly  commences  such  proceedings,   Lilly  shall  be
responsible  for any legal  costs  incurred  and will be  entitled to retain any
amounts  recovered.  In the event Lilly fails to commence  proceedings  to cease
such  infringement or defend any declaratory  judgment action filed with respect
to the Patent Rights within ninety (90) days of receiving notice thereof, Jenner
shall  be  entitled  to do so in its own  name in which  event  Jenner  shall be
responsible for all legal costs  incurred;  provided,  however,  Jenner shall be
entitled  to offset  any  costs and  expenses  (including  professionals'  fees)
incurred  by it in  connection  with any such suit  against any amounts it would
otherwise  owe to Lilly up to a maximum of fifty  percent (50%) of such amounts.
Lilly  shall  cooperate  fully  with  Jenner in  connection  with any such legal
action,   at  Jenner's   request  and   expense,   including  by  joining  as  a
party-plaintiff.  Any judgment, damages, settlement, or award which results from
any  such  action  shall be used  first to  reimburse  Jenner  for its  expenses
incurred  in  connection  with the  action and then to  reimburse  Lilly for any
royalty  offsets  taken by  Jenner.  Jenner  shall  have the right to retain any
remainder.

         5.3  Interferences;  Oppositions.  In the event  that the Lilly  Patent
Rights become involved in any interference or opposition proceeding, the parties
shall give each other prompt notice thereof and thereupon  confer together as to
what steps are to be taken to pursue or defend  against such  proceeding.  Lilly
shall have the first right to participate in such  proceedings,  at its expense.
Should Lilly elect not to  participate  in such  proceedings  within ninety (90)
days of  receiving  notice  thereof it shall  inform  Jenner and Jenner shall be
entitled to pursue or defend  against such  proceeding  in its own name in which
event  Jenner  shall be  responsible  for all legal  costs  incurred;  provided,
however,  Jenner shall be entitled to offset any costs and  expenses  (including
professionals'  fees)  incurred  by it in  connection  with any such  proceeding
against  any  amounts it would  otherwise  owe to Lilly up to a maximum of fifty
percent  (50%) of such  amounts.  Lilly  shall  cooperate  fully with  Jenner in
connection with any such proceeding, at Jenner's request and expense.

         5.4 [*].  In the event that [*]  enters  into a [*] to [*] made by such
[*] may [*] made in  accordance  with such [*] against the [*] owed [*] pursuant
to Section [*] herein, [*].


                                       -5-






                                   Article VI
                              Term and Termination
                              --------------------

         6.1  Term.  This  Agreement  shall be  effective  as of the date  first
written above,  and unless earlier  terminated  pursuant to this Article 5 shall
continue in full force until the latest  expiry of any patent  within the Patent
Rights.

         6.2 Termination  for Breach.  Either party may terminate this Agreement
on sixty  (60) days  written  notice to the other if the other is in  default or
breach of any material provision, provided, however, that if the party receiving
such notice cures or diligently  commences to cure the breach or default  within
such sixty (60) day  period,  this  Agreement  shall  continue in full force and
effect.  Failure to terminate this Agreement for any default or breach shall not
constitute  a waiver  by the  aggrieved  party of its  right  to  terminate  the
Agreement for any other default or breach.

         6.3  Permissive  Termination.  Jenner shall have the right to terminate
this  Agreement  with respect to any country and/or any Patent Right with thirty
(30) days written notice to Lilly.

         6.4 Surviving  Rights.  Termination of this Agreement shall not deprive
Lilly  of  its  right  to  collect  payments  due  or  interest  owed  prior  to
termination.  Articles 7 and 8 shall survive  expiration or  termination of this
Agreement for any reason.


                                   Article VII
                                 Confidentiality
                                 ---------------

         7.1  Confidential  Information.  Each party shall treat as confidential
all information received from the other which is marked  "CONFIDENTIAL" and each
shall  exercise  reasonable  care to maintain  the  confidentiality  of all such
information,  and  shall  employ it solely to  accomplish  the  purpose  of this
Agreement.

         The  obligations  of  confidentiality  and non-use  imposed  under this
Agreement shall not extend to any information that:

                  (a)      was known to the receiving party or the public prior 
                           to its disclosure under this Agreement;

                  (b)      becomes known to the recovering party or the public 
                           other than by breach of this Agreement;

                  (c)      is disclosed to the receiving party by a third party 
                           having a lawful right to make such disclosure;

                  (d)      is independently developed by  the receiving  party 
                           without use of the disclosure; or


                                       -6-






                  (e)      is required to be disclosed in order to perform the 
                           Agreement.

         The  restrictions  imposed under this Agreement  shall not apply to the
disclosure of any  information  necessary to obtain patents on inventions of the
parties relating to the subject matter of this Agreement, or to comply with U.S.
or foreign  laws or  regulations,  including  laws or  regulations  relating  to
approvals or registrations required for the manufacture or sale of Products.

         7.2  Survival.  Section 7.1 shall  remain in effect for three (3) years
following any termination of this Agreement.

                                  Article VIII
                                  Miscellaneous
                                  -------------

         8.1 Governing Law. This Agreement  shall be construed and the rights of
the  parties  determined  in  accordance  with the laws of the State of  Indiana
excluding any choice of law provisions which would direct the application of the
laws of any other jurisdiction.

         8.2 No  Agency.  Nothing  in  this  Agreement  shall  be  construed  or
interpreted as creating an agency or partnership relationship between Jenner and
Lilly.

         8.3 Captions.  Captions of Articles and Sections of this  Agreement are
for  convenience  only,  and the  construction  of this  Agreement  shall not be
affected by reference to such captions.

         8.4  Severability  of  Provisions.  If any  term or  provision  of this
Agreement or the application  thereof to any person or circumstance shall to any
extent be invalid or  unenforceable,  the  remainder  of this  Agreement  or the
application  of such term or  provision to persons or  circumstances  other than
those as to which it is held invalid or unenforceable shall not be affected, and
each term and provision of this Agreement  shall be valid and be enforced to the
fullest extent permitted by law.

         8.5 Complete Contract. This Agreement contains the entire understanding
between the parties  relating to the subject  matter hereof and  supersedes  all
written  and oral prior  agreements  and  understandings  with  respect  hereto.
Execution of this agreement shall  terminate the Option  Agreement made on March
31, 1994, between Jenner and Lilly.

         8.6  Amendment.  This  Agreement  may not be amended,  supplemented  or
otherwise modified except by an instrument in writing signed by both parties.

         8.7 Assignment.  Without the prior written approval of the other party,
this Agreement may not be assigned by either party except Jenner may assign this
Agreement  without  Lilly's prior  consent to an Affiliate or a party  acquiring
substantially  all of the business to which this Agreement  relates,  whether by
sale, merger, operation of law or otherwise.

         8.8 No Use of Name.  Except as  provided  below,  neither  party  shall
release any  information to any third party  regarding the existence or terms of
this Agreement without the prior



                                       -7-






written  consent  of the other.  This  prohibition  applies  to press  releases,
educational and scientific  conferences,  promotional materials and governmental
filings.  Notwithstanding  the above,  either party may  disclose the  existence
and/or terms of this Agreement in discussions with lenders,  investment bankers,
and other  sources  of  financing  and in  connection  with its  development  of
corporate partnerships. Notwithstanding the above, if Jenner is required by law,
court order or governmental regulation to release information to any third party
regarding the terms of this Agreement,  it shall notify Lilly of this fact prior
to releasing the  information.  Lilly shall have the right to confer with Jenner
regarding  the  necessity  for the  disclosure  and the text of the  information
proposed for release.  Any information  that is released  regarding the terms of
this Agreement shall contain only that information required by law. Jenner shall
be free to distribute  promotional  literature  concerning any Product but shall
not use the name of Lilly without Lilly's prior approval or as required by law.

         8.9 Force  Majeure.  Each party shall be  relieved  of its  obligations
under this Agreement to the extent that fulfillment of such obligations shall be
prevented by events or circumstances  beyond the reasonable control of the party
affected.

         8.10 Consents Not Unreasonably Withheld.  Whenever provision is made in
this  Agreement for either party to secure the consent or approval of the other,
such consent or approval  shall not  unreasonably  be withheld,  and whenever in
this  Agreement  provisions  made for one  party to object  to or  disapprove  a
matter, such objection or disapproval shall not unreasonably be exercised.

         8.11 No Strict  Construction.  This Agreement has been prepared jointly
and shall not be strictly construed against either party.

         8.12  Notice.  Any notice  required or permitted to be given under this
Agreement  shall be in  writing  and shall be  deemed to have been  sufficiently
given for all purposes  hereof if mailed by first class  certified or registered
mail,  postage  prepaid,  addressed  to the party to be  notified at its address
shown below or such other  address as may have been  furnished in writing to the
notifying party.



         To Lilly:          Eli Lilly and Company
                            Attention:  Patent Division; Drop 1117
                            Lilly Corporate Center
                            Indianapolis, Indiana 46285


         To Jenner:         Jenner Technologies
                            1895 Mountain View Drive
                            Tiburon, California 94920
                            Attn: Anthony E. Maida, III

         8.13  Improvements  or  Development.  Lilly shall have no obligation to
perform any development work or make any improvements  concerning a Product. Any
development performed or


                                      -8-







improvements  made by  Jenner  concerning  a Product  shall be made at  Jenner's
expense,  and owned by Jenner and Lilly  shall have no rights,  obligations,  or
liabilities concerning such developments or improvements.

         8.14 Arbitration;  Venue.  Lilly and the Company agree that any dispute
or  controversy  arising  out of, in  relation  to, or in  connection  with this
Agreement, or the validity, enforceability,  construction, performance or breach
thereof, which cannot be resolved by the parties may be submitted to non-binding
arbitration  in San  Francisco,  California,  under the  then-current  Licensing
Agreement Rules of the American Arbitration  Association with one (1) arbitrator
appointed in  accordance  with such Rules.  Lilly and the Company agree that any
claim or suit  arising  out of,  in  relation  to,  or in  connection  with this
Agreement, or the validity, enforceability,  construction, performance or breach
thereof,  shall be  brought in the state or  federal  courts  for Marin  County,
California, if initiated by Lilly, and in the state or federal courts for Marion
County, Indiana if brought by Jenner. The parties hereby consent to the personal
jurisdiction of and exclusive venue in such courts.


                      [THIS SPACE INTENTIONALLY LEFT BLANK]





                                       -9-






         IN WITNESS WHEREOF,  the parties have hereunto affixed their signatures
as of the day and year first written above.

JENNER TECHNOLOGIES                            ELI LILLY AND COMPANY


By: /s/ ANTHONY E. MAIDA, III                  By: /s/ AUGUST M. WATANABE
    --------------------------------              ------------------------------
        Anthony E. Maida, III                          August M. Watanabe, M.D.
        Chief Executive Officer                        Vice President

Date: June 15, 1994                            Date: June 13, 1994
      ------------------------------                 ---------------------------



                                      -10-






                                                                    EXHIBIT 10.7

                                LICENSE AGREEMENT


         Effective  June  1,  1994  ("EFFECTIVE  DATE"),   RESEARCH  CORPORATION
TECHNOLOGIES,  INC.,  a Delaware  corporation  at 101 North  Wilmot,  Suite 600,
Tucson,  Arizona  85711-3335  ("RCT"),  and JENNER  TECHNOLOGIES,  a  California
corporation at 1895 Mountain View Drive,  Tiburon,  California  94920 ("JENNER")
agree as follows:


                                    ARTICLE I

                               LICENSE and OPTION

         SECTION  1.1 Grant of  License.  RCT hereby  grants to JENNER a license
under the LICENSED  PATENTS to do the following in the LICENSED  TERRITORIES  in
the LICENSED  FIELD:  to develop,  make,  have made,  promote and SELL  LICENSED
PRODUCTS;  and to use LICENSED  PRODUCTS for research and development  purposes,
specifically  including  the  performance  of clinical  trials,  and for quality
control and promotional purposes. Except as set forth in the preceding sentence,
JENNER shall have no license to use  LICENSED  PRODUCTS.  Further,  JENNER shall
have no license to practice  any process  claimed in the  LICENSED  PATENTS.  No
other license or right is granted or implied by this SECTION.

         SECTION 1.2 Term of License.  The license granted in this ARTICLE shall
expire on the  EXPIRATION  DATE,  unless it is sooner  terminated as provided in
ARTICLE V ("Termination").

         SECTION 1.3  Extensions to AFFILIATES.

                  Subsection  1.3.1 Grant of Right. RCT hereby grants to JENNER,
on the terms and conditions of this Agreement, the right to extend to AFFILIATES
of JENNER the license  granted  under  SECTION  1.1.  JENNER shall notify RCT in
writing  before  any  extension  to an  AFFILIATE  is made.  In the  event  this
Agreement is terminated  for any reason,  all  extension to JENNER's  AFFILIATES
pursuant to this SECTION shall simultaneously be terminated.

                  Subsection 1.3.2 JENNER  Responsible for  Performance.  JENNER
agrees  to be  responsible  for the  performance  under  this  Agreement  by the
AFFILIATES  to which such  license  is  extended.  For  purposes  of  assessing,
reporting  and paying  earned  royalties  the  manufacture  or SALE of  LICENSED
PRODUCTS by JENNER'S  AFFILIATES  shall be considered the manufacture or SALE of
such LICENSED PRODUCTS by JENNER.

                  Subsection 1.3.3 Reports and Payments. Each AFFILIATE may make
the pertinent  reports and royalty payments  specified in ARTICLE III ("Fees and
Royalties") directly to RCT on behalf of JENNER, provided JENNER notifies RCT in
writing in advance. Otherwise such reports and payments shall be made by JENNER.
In any event,  the SALE of LICENSED  PRODUCTS by  JENNER'S  AFFILIATES  shall be
separately shown in JENNER'S reports to RCT.






         SECTION 1.4  OPTION FOR A LICENSE IN JAPAN.
                              

                  Subsection 1.4.1 Grant of Option.  RCT hereby grants to JENNER
an option to add the  Japanese  patent  applications  listed in EXHIBIT  A-2 and
patents  issuing  therefrom to the  definition  of LICENSED  PATENTS  under this
License  Agreement,  and to add Japan to the definition of LICENSED  TERRITORIES
under this Agreement.

                  Subsection  1.4.2 Exercise of Option.  Within thirty (30) days
after RCT's receipt of written notice that the Japanese Patent Office will issue
claims in either or both of the  applications  of EXHIBIT  A-2, RCT shall notify
JENNER of such  notice of  issuance.  Within  thirty  (30) days  after  JENNER's
receipt of such notice from RCT,  JENNER may  exercise  its option by giving RCT
written notice of its election to exercise.  Unless JENNER  exercises its option
as permitted under this Subsection,  the option shall expire and have no further
effect as of the date of expiration of such thirty (30) day period.

                  Subsection  1.4.3  Effect of Exercise.  Upon RCT's  receipt of
JENNER's written notice of its election to exercise,  the applications listed in
EXHIBIT A-2 and any and all issued patents, reissue,  reexamination,  renewal or
extension  patents that may be based on such  applications  shall be immediately
included in the  definition of LICENSED  PATENTS  under this License  Agreement.
Similarly,  upon RCT's  receipt  of  JENNER's  written  notice,  Japan  shall be
immediately  added to the definition of LICENSED  TERRITORIES under this License
Agreement.  JENNER's  obligations  under  this  Agreement  with  respect to such
Japanese applications and patents (specifically  including the obligation to pay
royalties for LICENSED  PRODUCTS made, or SOLD in Japan) shall begin on the date
of such inclusion in this License Agreement.

         SECTION 1.5   SUBLICENSE.

                  Subsection 1.5.1 Right to Grant SUBLICENSES. RCT hereby grants
to JENNER the right to grant to each of three  third  parties,  upon  reasonable
terms and conditions,  a  nonassignable,  royalty-bearing  SUBLICENSE  under the
LICENSED PATENTS in the LICENSED  TERRITORIES in the LICENSED FIELD commensurate
in scope with the  rights  granted in SECTION  1.1.  In  addition  to such three
SUBLICENSES,  JENNER  may grant  one or more  additional  SUBLICENSES  under the
LICENSED PATENTS in the LICENSED  TERRITORIES in the LICENSED FIELD,  with RCT's
prior written consent.

                  Subsection 1.5.2 SUBLICENSE Fees.  JENNER shall pay to RCT [*]
of any  license  issue fee and [*] of each  maintenance  fee  received  from the
SUBLICENSEE for such  SUBLICENSE,  excluding any amounts that JENNER  represents
and  warrants  it  has  received  for  research  and/or  development  or  equity
investment in JENNER. Each such amount shall be payable no later than sixty (60)
days after receipt by JENNER of such fee from the SUBLICENSEE.

                  Subsection  1.5.3  SUBLICENSE  Requirements.   The  SUBLICENSE
agreement  shall be in  writing  and shall  contain  provisions  similar  in all
material  respects to those of [*] of this  Agreement.  Further,  the SUBLICENSE
agreement must comply with all applicable laws and


                                       -2-





governmental  regulations.  In  particular,  JENNER  shall not have the right or
power to grant a SUBLICENSE under any circumstance  amounting to a misuse of any
LICENSED PATENT.

                  Subsection 1.5.4 JENNER's Obligations Continue. The grant of a
SUBLICENSE  under  Subsection  1.5.1,  shall  not  relieve  JENNER of any of its
obligations  under this  Agreement;  in particular,  JENNER shall continue to be
obligated,  under SECTION 3.2, to pay an earned royalty to RCT for each LICENSED
PRODUCT SOLD, whether such SALE is by JENNER or by the SUBLICENSEE.

                  Subsection  1.5.5  Notification   Requirement.   JENNER  shall
promptly notify RCT in writing of the issuance of such SUBLICENSE.  On or before
the date thirty (30) days after the execution of such  SUBLICENSE,  JENNER shall
provide  RCT  with a  true  copy  of the  SUBLICENSE  and  an  English  language
translation if it is in another language.

         SECTION 1.6 No Further Rights.  Except as provided in this ARTICLE,  no
other license or rights is granted or implied under this Agreement.


                                   ARTICLE II

                                 NON-EXCLUSIVITY

         The license granted in ARTICLE I shall be non-exclusive and RCT, in its
sole discretion,  may grant concurrently  effective  nonexclusive licenses under
the LICENSED PATENTS in the LICENSED  TERRITORIES in the LICENSED FIELD to third
parties for commercial purposes, and to INSTITUTION for educational and research
purposes.


                                   ARTICLE III

                               FEES AND ROYALTIES

         SECTION 3.1 License Issue Fee.  JENNER shall pay to RCT a license issue
fee of [*], payable as follows: [*] No portion of the license issue fee shall be
refundable,  nor may it be used as a credit  against any other amount payable by
JENNER under this  Agreement.  If this  Agreement is  terminated  for any reason
under  ARTICLE V before  JENNER has made full  payment of the license  issue fee
[*], JENNER shall have no obligation to pay the remaining unpaid amount.

         SECTION 3.2   Earned Royalties.

                  Subsection 3.2.1 Payability. JENNER shall pay to RCT an earned
royalty for:

                           (a) all LICENSED  PRODUCTS  SOLD by or for JENNER and
its AFFILIATES and SUBLICENSEES during the term of this Agreement; and


                                       -3-




                           (b) all LICENSED  PRODUCTS made before  expiration or
termination  of this  Agreement but SOLD by or for JENNER and its AFFILIATES and
SUBLICENSEES after expiration or termination of this Agreement.

                  Subsection  3.2.2 One Royalty.  JENNER's  obligation to pay an
earned  royalty  to RCT shall  arise  upon the  first to occur of the  making or
SELLING of a LICENSED  PRODUCT in a place that, but for this License  Agreement,
would infringe a LICENSED PATENT.  Notwithstanding  the foregoing,  JENNER shall
have no obligation to pay an earned royalty for any LICENSED  PRODUCT unless and
until  such  LICENSED  PRODUCT  is SOLD.  The  amount of such  royalty  shall be
calculated  based on the NET SALES VALUE of the SALE of such  LICENSED  PRODUCT.
None of JENNER,  its AFFILIATES and  SUBLICENSEES (if any) shall be obligated to
pay a  royalty  for the use of  LICENSED  PRODUCTS  for  research,  development,
clinical  trials,  quality  control  or  promotional  purposes.  Only one earned
royalty shall be payable with respect to any LICENSED PRODUCT, regardless of how
many claims or patents within the LICENSED PATENTS cover such LICENSED  PRODUCT.
If a LICENSED  PRODUCT is made in the U.S.  or Canada,  and is SOLD  outside the
U.S.  or Canada,  JENNER's  obligation  to pay  royalties  shall arise when such
LICENSED PRODUCT is made, but the royalties shall not be payable until such time
as the  LICENSED  PRODUCT  is SOLD;  furthermore,  if the SALE of such  LICENSED
PRODUCT does not infringe a LICENSED PATENT in such country,  JENNER shall still
be obligated to pay RCT a royalty for the making of LICENSED PATENTS in the U.S.
or Canada,  and the amount of such royalty shall be calculated  based on revenue
generated by the SALE in such country outside the U.S. or Canada.

                  Subsection   3.2.3  Royalty  Amount.   The  amount  of  earned
royalties JENNER shall pay to RCT shall be [*].

                  Subsection 3.2.4 More Favorable Royalty Rates.

                           (a)  Generally.  If,  under  substantially  identical
provisions and  conditions,  RCT grants a license under the LICENSED  PATENTS to
any third party (other than to JENNER's  AFFILIATE)  SELLING products covered by
the LICENSED PATENTS in a given country(ies)  covered by the LICENSED PATENTS at
an earned  royalty rate that is lower than that provided in Subsection  3.2.3 of
this Agreement,  then RCT shall promptly notify JENNER as provided in Subsection
3.2.4(b)  below and,  upon  JENNER's  timely  request,  modify the terms of this
Agreement by changing the earned royalty rate in Subsection  3.2.3 as it applies
to such country(ies) only, to such lower earned royalty rate. [*].

                           (b) [*]. If RCT grants to one or more third parties a
license under the LICENSED PATENTS having a lower earned royalty rate, RCT shall
notify  JENNER in writing of any such  license  and a brief  description  of the
terms of such third party license, [*].

                           (c)  Limitations.  This Subsection  shall not entitle
JENNER to any refund for amounts  previously paid to RCT. Further,  JENNER shall
not be entitled to a lower earned royalty rate if the  third-party  licensee has
obtained  such lower earned  royalty rate in return for  substantial  and unique
consideration  that  JENNER  is unable  or  unwilling  to  provide  to RCT.  The
provisions of this Subsection


                                       -4-




shall not be called into operation  because of the existence or operation of any
license  granted  or to be  granted  to or on  behalf of any  government  or any
increase in the royalty rate because of taxes imposed by any government.

                  Subsection  3.2.5 No Royalty  Charged  under  U.S.  Government
License. Notwithstanding Subsection 3.2.1, earned royalties shall not be payable
on any  LICENSED  PRODUCT  made or SOLD  under any  license  under the  LICENSED
PATENTS granted to or on behalf of the U.S.  Government as further  described in
ARTICLE VIII of this Agreement.

                  Subsection 3.2.6 Withholding of Taxes. If the taxing authority
of any government of any country  covered by the LICENSED  PATENTS imposes a tax
on the royalties to be paid under this Agreement or requires  JENNER to withhold
amounts from royalties  payable to RCT to ensure  payment of such taxes,  JENNER
shall  cooperate  with RCT in RCT's efforts to obtain  exemption from payment of
such taxes or a refund of taxes withheld.

         SECTION 3.3  Annual Minimum Royalties.

                  Subsection 3.3.1 Amount and Payment Date.  JENNER shall pay to
RCT a prepaid, annual minimum royalty of [*].

                  Subsection  3.3.2 [*] until  expiration or termination of this
Agreement.

                  Subsection  3.3.3 Credits.  JENNER shall be entitled to credit
the  annual  minimum  royalty  payment  paid  against  the  amount of the earned
royalties payable in the same calendar year for manufacture or SALES of LICENSED
PRODUCTS.  No amount of earned  royalties  paid for any  calendar  year shall be
creditable  against any annual minimum royalty payment due in any other calendar
year.

         SECTION  3.4  Books and  Records.  JENNER  shall  keep  full,  true and
accurate books of account  containing all particulars and reasonable  supporting
documentation that may be necessary for the purpose of determining the NET SALES
VALUE of all  LICENSED  PRODUCTS  SOLD.  The  books of  account  and  reasonable
supporting  documentation  shall be kept at JENNER's principal place of business
and shall be open at all reasonable times, for three (3) years following the end
of the  calendar  year to which they  pertain  (and  access  shall not be denied
thereafter  if  reasonably  available),  to  the  inspection  of an  independent
certified  public  accountant  retained  by RCT for  the  purpose  of  verifying
JENNER's royalty statements; however, RCT shall not be entitled to more than one
(1) such  inspection  each calendar  year.  RCT agrees to keep in confidence all
information  it learns  about  JENNER's  business  pursuant to this  SECTION and
SECTION 3.6. If any such  inspection  discloses an underpayment of royalties [*]
of the amount of royalties  actually due for any quarterly  period,  then JENNER
shall promptly pay the reasonable cost of such inspection after JENNER's receipt
of the bill/invoice for such inspection. RCT shall instruct its certified public
accountant to disclose to RCT only if such inspection  discloses an underpayment
of royalties [*], and if so, the amount thereof.



                                       -5-



         SECTION 3.5 Periodic Reports. Beginning with the first SALE of LICENSED
PRODUCTS  under  this  Agreement,  and  continuing  throughout  the term of this
Agreement,  on or before  February  1, May 1,  August 1, and  November 1 of each
year,  JENNER shall deliver to RCT a true and accurate  written report,  showing
the following as they apply to the preceding calendar quarter just ended:

                           (a) the quantities of LICENSED  PRODUCTS  invoiced by
JENNER, its AFFILIATES and SUBLICENSEES on a country-by-country basis;

                           (b) the U.S.  dollar value of the invoiced  amount on
such quantities in (a);

                           (c) the  computation  of the NET SALES VALUE based on
the dollar value of the invoiced amount on in (b); and

                           (d) the  computation  of  royalties  based on the NET
SALES VALUE computed under (c).

JENNER's  payment of the royalties due for the calendar  quarter  covered by the
written report shall accompany the report.  If no royalties are due, it shall be
so reported.  Royalties  shall be paid to RCT in U.S.  currency at RCT's address
specified in SECTION 7.2. The correctness  and  completeness of each such report
shall be certified in writing by a responsible  financial officer (or his or her
designee)  of  JENNER,  by the  independent  public  accounting  firm  acting as
JENNER's  auditor,  or by the chair or other  head of  JENNER's  internal  audit
committee.  Within  thirty (30) days after  expiration  or  termination  of this
Agreement,  JENNER shall  provide to RCT a written  report that  complies in all
respects with this SECTION.

         SECTION 3.6  Foreign Sales.

                  Subsection 3.6.1 Exchange Rate. If JENNER, its AFFILIATE(S) or
SUBLICENSEE(S) SELL any LICENSED PRODUCTS for currency other than U.S. currency,
the earned royalty payable as to such LICENSED PRODUCT shall first be determined
in such currency for which the LICENSED PRODUCT was SOLD and then converted into
its equivalent in U.S. currency as follows:

                           (a) at the selling rate, for such  currency,  for the
last business day of the accounting period for which payment is made,  published
by the Wall Street Journal; or

                           (b) if such rate is not so published,  at the selling
rate for such  currency for the last business day of the  accounting  period for
which payment is made, as published by a leading New York,  New York bank chosen
by JENNER and reasonably acceptable to RCT.

If JENNER is late in making any payment  under this  Agreement,  the  applicable
exchange rate obtained from the sources  described above shall be the greater of
such rate on the date payment was actually made or the rate on the date on which
payment is due.


                                       -6-



         SECTION 3.7   Late Payment.

                  Subsection 3.7.1 Late Payment Fee. JENNER hereby  acknowledges
that late payment by JENNER to RCT of sums due under this  Agreement  will cause
RCT to incur certain  costs,  including  costs for legal,  accounting  and other
professional services to manage and administer this Agreement,  the exact amount
of which will be extremely difficult to ascertain.  Accordingly, if JENNER fails
to make any payment  required  under this Agreement on or before the date thirty
(30) days after  JENNER's  receipt of RCT's written  notice of such failure,  in
addition  to any other  remedy  available  under this  Agreement  and any remedy
available at law or equity,  JENNER shall pay to RCT a late payment fee equal to
the lesser of [*] (in  addition to any  interest  charges  required or permitted
below).  The  parties  hereby  agree that such late  charge  represents  a fair,
reasonable and  administratively  simple  estimate,  at the time of execution of
this Agreement, of the costs RCT will incur by reason of JENNER's late payment.

                  Subsection 3.7.2 Interest. If JENNER fails to make any payment
required under this Agreement on or before the date ten (10) days after JENNER's
receipt of RCT's written  notice of such  failure,  JENNER shall pay interest on
such  amount  at an  annual  rate of [*] which  shall  accrue  from the date the
payment not timely made became due until the date such  payment is paid in full;
provided,  however, that if such [*] rate exceeds the rate allowed by applicable
law, then the highest rate allowed by law shall apply.

                  Subsection  3.7.3 No Waiver.  RCT's acceptance of late charges
or  interest  shall in no event  constitute  a waiver of JENNER's  default  with
respect to such overdue amount, nor prevent RCT from exercising any of the other
rights and remedies granted under this Agreement. Any payments received shall be
applied first to any late  charges,  second to the  satisfaction  of any unpaid,
accrued interest and finally to the satisfaction of any unpaid principal.


                                   ARTICLE IV

                        OBLIGATIONS OF JENNER; DILIGENCE

         SECTION 4.1  JENNER's  Development.  JENNER  shall  exercise  diligence
consistent  with  its  reasonable  business  judgment  in  developing,  testing,
manufacturing and marketing LICENSED PRODUCTS under this License Agreement.

         SECTION 4.2 Activities  Limited to LICENSED FIELD and SALES of LICENSED
PRODUCTS. JENNER covenants that all of its activities under the LICENSED PATENTS
shall be limited to the LICENSED  FIELD.  JENNER  promises and covenants that it
shall not SELL LICENSED PRODUCTS outside the LICENSED FIELD. JENNER promises and
covenants  that it shall not use  LICENSED  PRODUCTS  or LICENSED  PROCESSES  to
provide services on a fee-for-service basis.


                                    ARTICLE V


                                       -7-





                           EXPIRATION AND TERMINATION

         SECTION 5.1 Expiration on EXPIRATION  DATE This Agreement  shall expire
on the EXPIRATION DATE unless sooner terminated, as provided below.

         SECTION 5.2 JENNER's  Election.  JENNER may terminate this Agreement at
any time by giving the RCT three (3) months' written notice of JENNER's election
to terminate this Agreement.

         SECTION 5.3 JENNER's Default.

                  Subsection 5.3.1 Monetary Default.  Upon any material monetary
default under this  Agreement by JENNER (i.e.,  failure to timely pay amounts to
RCT  required  to be paid under this  Agreement),  RCT, in addition to any other
remedy  available  at law or equity,  may elect to terminate  this  Agreement by
giving JENNER thirty (30) days'  written  notice of RCT's  election to terminate
this Agreement.  This Agreement shall terminate on the expiration of such thirty
(30) day period unless JENNER has cured such default on or before such date.

                  Subsection  5.3.2  Non-Monetary  Default.  Upon  any  material
non-monetary default under this Agreement by JENNER (i.e., one not involving the
payment to RCT of any  amounts  required to be paid under this  Agreement),  RCT
may,  in  addition  to any other  remedy  available  at law or equity,  elect to
terminate  this  Agreement by giving JENNER thirty (30) days' written  notice of
RCT's election to terminate this Agreement.  This Agreement shall terminate upon
the  expiration  of such thirty (30) day  period,  unless  JENNER has cured such
default on or before such date.

                  Subsection  5.3.3  Immediate  Default.  The following shall be
defaults  under this  Agreement  that  JENNER  may not cure:  any  voluntary  or
involuntary  dissolution,  bankruptcy,  insolvency  of JENNER or  assignment  of
JENNER's  assets  for the  benefit  of  creditors  (collectively,  a  "Financial
Default")  and  a  lawsuit  or  reexamination  or  protest  proceeding  (or  the
equivalent)  filed by JENNER  against  RCT  seeking a  declaratory  judgment  or
determination,  as the case may be, that any of the PATENT  CLAIMS are  invalid,
unenforceable,  or otherwise not patentable  ("Procedural  Default").  Financial
Defaults and Procedural Defaults shall constitute  immediate defaults under this
Agreement and, upon the  occurrence of either a Financial  Default or Procedural
Default,  this  Agreement  shall  immediately  terminate.  On or before the date
thirty (30) days before the occurrence of a Financial Default or the filing of a
bankruptcy  petition  concerning  JENNER,  JENNER shall notify RCT in writing of
JENNER'S  intention to file the  petition or of  another's  intention to file an
involuntary petition in bankruptcy, if JENNER knows or should know of such other
party's  intention  to file,  or the  impending  Financial  Default.  Failure to
provide such written  notice shall be deemed to be an  immediate,  pre-petition,
incurable default under this Agreement.

         SECTION 5.4 Surviving Obligation to Pay Royalties. JENNER's obligations
to  pay  royalties  under  Subsection   3.2.1(b)  shall  survive  expiration  or
termination of this Agreement.

         SECTION 5.5 Surviving Provisions.  In addition to any provision of this
Agreement that expressly provides for acts or obligations to continue beyond the
expiration or termination of this


                                       -8-



Agreement,  the  provisions  of SECTIONS  3.5 ("Books and  Records"),  the final
sentence of SECTION 3.6 ("Periodic  Reports"),  3.8 ("Late Payment") and ARTICLE
VII ("General") shall survive expiration or termination of this Agreement.


                                   ARTICLE VI

                                  INFRINGEMENT

         SECTION 6.1 RCT'S Right to  Prosecute.  RCT shall  protect the LICENSED
PATENTS from  infringement  and prosecute  infringers  when in its sole judgment
such action may be necessary, proper and justified.

         SECTION 6.2  Obligation  to  Cooperate.  If RCT initiates or carries on
legal proceedings to enforce the LICENSED PATENTS against an alleged  infringer,
JENNER shall cooperate with RCT, at no out-of-pocket expense to JENNER.


                                   ARTICLE VII

                                     GENERAL

         SECTION 7.1  Integration.  This Agreement and any Exhibits,  and Riders
attached to this Agreement  constitute the entire agreement  between the parties
as to  the  subject  matter  of  this  Agreement  and  all  prior  negotiations,
representations,  warranties,  and promises are  superseded and merged into, and
completely  expressed  by it.  No party  shall be bound by or  charged  with any
written  or  oral  agreements,  representations,  warranties,  or  promises  not
specifically set forth in this Agreement.

         SECTION 7.2  Addresses  and Notices.  All  notices,  requests and other
communications  provided  in this  Agreement  shall be in  writing  and shall be
deemed to have been given: (a) when delivered,  if delivered by hand, or sent by
facsimile,  telegram or telecopier;  (b) on the date  following  deposit with an
overnight courier,  if sent via overnight  courier;  or (c) on the date five (5)
days following deposit with the U.S. mail, certified or registered:

         If to RCT:                                    If to JENNER
         ----------                                    ------------

         President                                     Anthony E. Maida
         Research Corporation Technologies, Inc.       Chief  Executive Officer
         101 North Wilmot                              Jenner Technologies
         Suite 600                                     1895 Mountain View Drive
         Tucson, Arizona 85711-3335                    Tiburon, California 94920
         TEL:     (602) 748-4400                       TEL:     (510) 736-1863
         FAX:     (602) 748-0025                       FAX:     (510) 736-5910



                                       -9-



Such  addresses  may be altered by notice.  If no time limit is specified  for a
notice  required  or  permitted  to be given by this  Agreement,  the time limit
therefor  shall be three  (3)  full  business  days,  not  including  the day of
mailing.

         SECTION 7.3  Applicable  Law;  Venue.  This Agreement is subject to and
shall be construed in accordance  with the law of the State of Arizona,  U.S.A.,
without regard to the law of Arizona  regarding the conflicts of laws, except as
to any issue that  depends upon the  validity,  scope or  enforceability  of any
LICENSED  PATENTS,  which  issue  shall be  determined  in  accordance  with the
applicable patent laws of the country of such patent. Except with respect to any
issue that  involves  the patent  laws of the  country of a patent,  the parties
agree that any action, suit or proceeding brought under this Agreement or any of
the  transactions  contemplated  in this Agreement  shall be brought in the U.S.
District Court for the District of Arizona or any court in Pima County,  Arizona
of competent  jurisdiction  in the case where JENNER brings such action,  and in
the U.S.  District Court for the Northern District of California or any court in
Marin County,  California of competent jurisdiction in the case where RCT brings
such action.  Each party further agrees that service of process of notice in any
such action,  suit or proceeding  shall be effective if in writing and sent in a
manner provided in SECTION 7.2.

         SECTION  7.4  Non-Use  Of  Names.  JENNER  shall  not use  the  name of
INVENTORS,  INSTITUTION, RCT or any adaption of any of them, in any advertising,
promotional or sales literature, without prior written consent obtained from the
INVENTORS, INSTITUTION or RCT, as applicable.

         SECTION 7.5 Assignment.  This Agreement shall not be assigned by JENNER
except upon the merger,  acquisition  or sale of  substantially  all of JENNER's
business assets pertaining to this License Agreement,  upon prior written notice
to RCT,  and upon  JENNER's  assignee's  agreement to abide by the terms of this
Agreement and assume all of JENNER's obligations under this Agreement. Upon such
assignment,  the term "JENNER" as used in this Agreement  shall  thereafter mean
the assignee of JENNER.

         SECTION 7.6  Arbitration.

                  Subsection  7.6.1 Dispute  Resolution.  The parties shall make
all reasonable  efforts to resolve any dispute or controversy  arising out of or
relating to this Agreement, its construction or its actual or alleged breach, by
face-to-face  negotiations  between senior executives.  Should such negotiations
fail to  resolve  the  matter,  the matter  shall be finally  decided by binding
arbitration by one arbitrator in accordance  with the Licensing  Agreement Rules
then in effect of the American  Arbitration  Association,  and judgment upon the
award  rendered  may be entered  in the  highest  court of the  forum,  state or
federal,  having  jurisdiction.  Any  arbitration  instituted by JENNER shall be
conducted  in  the  Tucson,  Arizona  metropolitan  area,  and  any  arbitration
instituted  by  RCT  shall  be  conducted  in  the  San  Francisco,   California
metropolitan  area. The costs of the arbitration  shall be shared equally by RCT
and JENNER, except that each party shall pay its own attorneys' fees.

                  Subsection  7.6.2  Exceptions.  The  provisions  of Subsection
7.6.1 relating to arbitration shall not apply to any issue of the patentability,
enforceability  or  infringement  of any  LICENSED  PATENT or to any  dispute or
controversy as to which any applicable law or treaty prohibits


                                      -10-



such  arbitration.  If, in any  arbitration  proceeding,  any issue  shall arise
concerning  validity,  scope,  enforceability  or  infringement  of any LICENSED
PATENT,  the  arbitration  shall  assume  the  LICENSED  PATENTS  to  be  valid,
enforceable  and  infringed  (but  for  this  Agreement).   In  any  event,  the
arbitrators  shall not delay  the  arbitration  proceeding  for the  purpose  of
obtaining or  permitting  either  party to obtain  judicial  resolution  of such
issue, unless an order staying such arbitration proceeding shall be entered by a
court of competent jurisdiction.  Neither party shall raise any issue concerning
the validity,  construction,  enforceability or effect of any LICENSED PATENT in
any  proceeding to enforce an arbitration  award  hereunder or in any proceeding
otherwise arising out of such arbitration award.

                  Subsection  7.6.3 No Waiver.  Notwithstanding  the  foregoing,
nothing in Subsections  7.6.1 or 7.6.2 shall be construed to waive any rights or
timely performance of any obligations existing under this Agreement.

         SECTION 7.7 Compliance  with Law.  Nothing in this  Agreement  shall be
construed  so as to require  the  commission  of any act  contrary  to law,  and
wherever  there is any conflict  between any provision of this Agreement and any
statute,  law,  ordinance or treaty concerning the legal right of the parties to
contract, the latter shall prevail, but in such event the affected provisions of
this  Agreement  shall be curtailed and limited only to the extent  necessary to
bring it within the applicable legal requirements.

         SECTION 7.8 Severability. If any provision of this Agreement is held to
be or becomes  invalid,  illegal or  unenforceable,  the validity,  legality and
enforceability  of the remaining  provisions of this Agreement  shall not in any
way be affected or impaired thereby.

         SECTION 7.9 Representations, Warranties, and Covenants.

                  Subsection 7.9.1 By RCT. RCT represents and warrants that: (i)
RCT has the full right and  authority  to grant  rights,  license  and  interest
granted herein and perform its obligations  hereunder;  (ii) RCT owns all right,
title and interest in the LICENSED  PATENTS;  (iii) RCT has not previously,  and
will not grant during the term of this Agreement, any right, license or interest
in and to the LICENSED PATENTS,  or any portion thereof,  on an exclusive basis;
(iv)  the  LICENSED  PATENTS  are free and  clear  of all  liens,  encumbrances,
security  interests and  restrictions;  and (v) to the best of RCT's  knowledge,
there are no actions,  suits, claims or proceedings pending or threatened in any
way relating to the LICENSED PATENTS.

                  Subsection  7.9.2 By JENNER.  JENNER  represents  and warrants
that it has the full right and  authority to enter into this  License  Agreement
and to perform its obligations hereunder.

                  Subsection 7.9.3 Limitations.  Notwithstanding anything to the
contrary  in this  Agreement,  nothing  contained  in this  Agreement  shall  be
construed as a  representation  or warranty:  (a) as to the scope or validity of
LICENSED PATENT; or (b) that any performance, practice under any LICENSED PATENT
is not an infringement of any patent of others.


                                      -11-



         SECTION 7.10  Independent  Contractor.  In its  performance  under this
Agreement,  each party shall be an independent contractor and neither party (nor
any employee or agent thereof) shall be an agent or partner of the other party.

         SECTION 7.11 Headings.  The headings of the various ARTICLES,  SECTIONS
and  Subsections  of this  Agreement are used solely for the  convenience of the
parties, do not form a part of this Agreement and are not intended to affect the
interpretation  or meaning of this  Agreement  or to  define,  limit,  extend or
describe its scope or intent.

         SECTION  7.12 No  Third-Party  Beneficiaries.  Except for  SECTIONS 7.4
("Non-Use of Names") and 7.16 ("Indemnity"), which shall also be for the benefit
of, and enforceable by, INSTITUTION and INVENTOR, none of the provisions of this
Agreement shall be for the benefit of, or enforceable by, any third-party.

         SECTION 7.13  Waiver.  No consent or waiver,  express or implied,  by a
party of any  breach or default by any other  party in the  performance  by such
other party of its  obligations  hereunder shall be construed to be a consent to
or waiver or any other breach or default in the  performance of such other party
of the same or any other obligations  hereunder.  Failure on the part of a party
to  complain  of any act or failure to act by the other  party,  to declare  the
other party in default,  irrespective  of how long such  failure  continues,  to
insist upon the strict performance of any covenant, duty, agreement or condition
of this  Agreement or to exercise any right or remedy  consequent  upon a breach
thereof shall not constitute a waiver by such party of its rights hereunder,  of
any such breach, or of any other commitment,  duty, agreement or condition.  The
giving of  consent by a party in any one  instance  shall not limit or waive the
necessity to obtain such party's consent in any future instance and in any event
no consent or waiver shall be effective  for any purpose  hereunder  unless such
consent or waiver is in writing and signed by the party sought to be charged.

         SECTION  7.14  Computation  of Time.  In  computing  any period of time
pursuant to this Agreement, the day or date of the act, notice, event or default
from which the designated period of time begins to run will not be included. The
last day of the period so computed  will be  included,  unless it is a Saturday,
Sunday or a federal holiday, in which event the period runs until the end of the
next day that is not a Saturday,  Sunday or federal holiday.  Only business days
shall be counted in any computation of time.

         SECTION 7.15 Disclaimer.  It shall be the full and sole  responsibility
of JENNER to use  appropriate  care in the practice,  manufacture and use of any
product  pursuant to any license or immunity  granted under this Agreement.  RCT
shall have no right to control the manner in which any LICENSED  PRODUCT is made
or  practiced.  RCT shall not be required to provide any  know-how or  operating
instructions or other information with respect to any such product and RCT makes
no representation or warranty  whatsoever with respect to any such product.  RCT
shall not be  obligated  to file any patent  applications,  secure any patent or
maintain any patent in force, although, if RCT intends and elects to discontinue
the  prosecution of any such patent  application or the  maintenance of any such
patent, RCT shall so advise JENNER and, subject to RCT's obligations to previous
licensees  under the LICENSED  PATENTS,  give JENNER an  opportunity to continue
such prosecution or maintenance on RCT's behalf


                                      -12-




and at JENNER's  expense.  Any  out-of-pocket  expenses  thereafter  incurred by
JENNER for such  prosecution or maintenance of any patent or patent  application
of any such country  shall be creditable  against  earned  royalties  thereafter
payable under this Agreement  solely in respect of LICENSED  PRODUCTS,  made, or
SOLD in the country of such patent or patent application.  RCT shall keep JENNER
apprised  of  the  status  of the  prosecution  of the  LICENSED  PATENTS,  upon
reasonable request of JENNER occurring not more frequently than monthly.

         SECTION 7.16  Indemnity.  JENNER agrees to  indemnify,  defend and hold
harmless RCT, INVENTORS, INSTITUTION, and all officers, directors, employees and
agents of RCT and INSTITUTION (collectively, the "INDEMNITIES") from and against
any and all claims,  damages and  liabilities,  including  legal costs and fees,
asserted  by third  parties  arising  from the  manufacture,  use or sale of any
LICENSED PRODUCTS by or for JENNER, or arising from the use of any such LICENSED
PRODUCT by any third  party,  including  any  customer of JENNER,  except to the
extent such claims,  damages or liabilities are due to RCT's willful  misconduct
or  negligence.  JENNER  hereby  waives  any rights of  subrogation  it may have
against the  INDEMNITIES  on account of any claim,  damage or liability  arising
from activities  under or in connection with this Agreement.  JENNER shall cause
its applicable product liability insurance policy to contain a provision whereby
the insurer waives any rights of subrogation against the INDEMNITIES.

         SECTION  7.17  Insurance.  On or before the date of the first SALE of a
LICENSED  PRODUCT  under this  Agreement,  JENNER shall  obtain and,  thereafter
throughout  the term of this  Agreement,  maintain  in force  product  liability
insurance and other insurance  coverage  typically carried by PERSONS engaged in
JENNER's business,  but at least [*] for JENNER's SALE of LICENSED PRODUCTS as a
therapeutic  vaccine for prostate cancer,  and at least [*] for JENNER's SALE of
LICENSED  PRODUCTS as a  prophylactic  vaccine for prostate  cancer,  or, in the
alternative,  JENNER may  self-insure  against  such risks if its net worth,  as
measured by the most recent  audited  statement,  exceeds  [*].  Such  insurance
policies shall name RCT as an additional named insured. JENNER hereby waives any
rights  of  subrogation  it may  have  against  RCT on  account  of any  product
liability claim. The insurance  policies  required to be carried by JENNER under
this Agreement shall be with companies that have a Best's  Financial Rating of A
or better.  JENNER  shall  furnish  RCT with a  certificate  of such policy upon
request,  and whenever requested,  shall satisfy RCT that such policy is in full
force and effect.

         SECTION  7.18  Construction.  The  parties  agree  that each  party has
reviewed  this  Agreement and that any rule of  construction  to the effect that
ambiguities are to be resolved against the drafting party shall not apply to the
interpretation of this Agreement.

         SECTION  7.19  Patent  Marking.  JENNER  agrees  that it shall mark all
LICENSED  PRODUCTS  with a legible  notice  indicating  the patents to which the
LICENSED PRODUCTS are subject.

         SECTION  7.20  Registration  of  Agreement.  JENNER  agrees to take all
reasonable and necessary  steps to register this Agreement in any country of the
LICENSED  TERRITORIES  where such is  required  to permit the  transfer of funds
and/or  payment of  royalties to RCT  hereunder or is otherwise  required by the
government or law of such country to effectuate or carry out this Agreement.


                                      -13-




Notwithstanding anything contained herein, JENNER shall not be relived of any of
its  obligations  under this Agreement by any failure to register this Agreement
in any country of the LICENSED TERRITORIES,  and specifically,  JENNER shall not
be relieved of its obligation to make any payment to RCT  hereunder,  which such
payment is blocked due to any failure to register this Agreement.

         SECTION 7.21 Authority and Binding Agreement. Each party represents and
warrants  to the  other  that this  Agreement  constitutes  a valid and  binding
agreement of the representing party, that execution, delivery and performance of
this Agreement by the  representing  party are within the  representing  party's
corporate  power,  and have  been duly  authorized  by all  necessary  corporate
action.

         SECTION 7.22 No Publicity  About this  Agreement.  The parties agree to
keep the  existence and terms of this License  Agreement in confidence  and that
they shall  refrain from  publicly  disclosing  the  existence and terms of this
Agreement,  except to the extent that RCT is  required  to disclose  such to the
INSTITUTION  and the  INVENTORS,  and to previous  licensees  under the LICENSED
PATENTS; provided,  however, the parties may disclose the existence and terms of
this Agreement to comply with court order, law or government  regulation,  or to
accountants,  banks or  another  financing  source  (or  their  advisors)  or in
connection with a merger, acquisition or securities offering.


                                  ARTICLE VIII

                                GOVERNMENT RIGHTS

         SECTION 8.1 Prior  Rights.  This  Agreement is subject to the rights of
the U.S.  Government  in and to the LICENSED  PATENTS,  including  those derived
through the  National  Cancer  Institute  ("NCI") of the  Department  of Health,
Education,  and Welfare ("DHEW"),  pursuant to a certain grant by the Government
to INSTITUTION identified as NCI Grant CA-15437, which rights are described in a
certain contract entitled "Institutional Patent Agreement",  made the 7th day of
April, 1976, by and between the U.S.  Government and INSTITUTION.  A copy of the
"Institutional Patent Agreement" is attached as Exhibit B-1, and a transcript of
that copy (for  clarity)  is  attached at Exhibit  B-2.  Such  rights  include a
nonexclusive,  nontransferable,  royalty-free,  irrevocable  license to the U.S.
Government for governmental purposes.  Such license to the U.S. Government shall
remain unaffected by this Agreement.

         SECTION  8.2  License  to  Conform.  Any  inconsistency   between  this
Agreement and the  pertinent  provisions  of any law,  regulation,  or executive
order by the U.S.  Government  shall be resolved by conforming this Agreement to
such provisions of any such law, regulation,  or executive order. This Agreement
shall  be  subject  to  applicable  governmental  laws  relating  to  compulsory
licensing.


                                   ARTICLE IX

                                   DEFINITIONS



                                      -14-





         SECTION  9.1  "AFFILIATE"  means any PERSON to which one or more of the
following apply:

                           (a) any PERSON  directly or  indirectly  controlling,
controlled by or under common control with JENNER;

                           (b) any PERSON  owning or  controlling  fifty percent
(50%) or more of the outstanding voting rights or securities of JENNER; or

                           (c) any PERSON  whose  outstanding  voting  rights or
securities are owned fifty percent (50%) or more by JENNER.

         SECTION  9.2  "EXPIRATION  DATE"  means  the  expiration  date  of  the
last-to-expire LICENSED PATENT.

         SECTION 9.3 "INSTITUTION" means Health Research,  Inc. of Buffalo,  New
York.

         SECTION 9.4 "INVENTION" means "Immunological Test for Prostate Cancer".

         SECTION 9.5 "INVENTORS" means [*].

         SECTION 9.6 "LICENSED FIELD" means the use of prostate specific antigen
("PSA") as a  prophylactic  vaccine for  prostate  cancer  and/or a  therapeutic
vaccine for prostate cancer.

         SECTION 9.7 "LICENSED PATENTS" means:

                           (a) all issued,  unexpired  patents listed in EXHIBIT
A-1;

                           (b) all  divisional or  continuation,  in whole or in
part, applications based on any of the patents or applications listed in EXHIBIT
A-1;

                           (c) all issued,  unexpired patents resulting from any
of the applications described in (b); and

                           (d) all  issued,  unexpired  reissue,  reexamination,
renewal or extension  patents that may be based on any of the patents  described
in (a) or (c).

         SECTION 9.8 "LICENSED PRODUCT" means a product,  the manufacture,  use,
or SALE of which infringes a PATENT CLAIM under 35 USC ss.271 and/or  applicable
case law, but for this License Agreement.

         SECTION 9.9 "LICENSED  TERRITORIES"  means Canada and the United States
of America, its territories and possessions.



                                      -15-




         SECTION 9.10 "NET SALES VALUE" of any LICENSED PRODUCT means the actual
billings  for the SALE of such  LICENSED  PRODUCT,  less  allowable  deductions,
listed below.

                  Subsection  9.10.1 [*] used for  calculating  [*] shall be the
amount [*]; provided,  however, [*] shall only be included in [*], otherwise [*]
shall only include [*].

                  Subsection  9.10.2  [*].  When  factually  applicable,  [*] as
determined above:

                           (a) [*], in amounts customary in the trade;

                           (b) [*], and with  specific  referent to,  particular
                               [*];

                           (c) [*]; and

                           (d) [*], to the extent included in such [*].

No other [*] shall be made  including  without  limitation  [*] by whatever name
known or for any [*].

         SECTION  9.11  "PATENT  CLAIM"  means a claim in a LICENSED  PATENT.  A
PATENT  CLAIM shall be presumed to be valid unless and until it has been held to
be  invalid  or  unenforceable  by a  final  judgment  of a court  of  competent
jurisdiction  from  which no appeal  can be or is taken.  For  purposes  of this
Agreement, and especially for purposes of royalty determination and payment, any
claim in a pending patent  application shall be deemed to be the equivalent of a
valid  claim  of an  issued,  unexpired  patent  and in  consideration  of RCT's
agreement to grant a license under any patent issuing  thereon earned  royalties
shall be payable in respect thereto as though it were a valid patent claim.

         SECTION  9.12  "PERSON"   means  an   individual   or  a   corporation,
partnership, trust, unincorporated organization, association or any other entity
or a government or any department or agency thereof.

         SECTION  9.13  "SELL"  (and  any  noun  form,   including  "SALE",  and
conjugated  verb form  thereof)  shall mean to sell,  or otherwise  part with or
dispose of LICENSED PRODUCTS, for value.

         SECTION 9.14  "SUBLICENSE"  means mean a sublicense  under the LICENSED
PATENTS  granted in accordance  with the terms of SECTION 1.5 of this Agreement.
Likewise, "SUBLICENSEE" shall mean the party to which rights are granted under a
SUBLICENSE.

RESEARCH CORPORATION                                    JENNER TECHNOLOGIES
  TECHNOLOGIES, INC.


/s/ GARY M. MUNSINGER                                    /s/ ANTHONY E. MAIDA
- ---------------------                                    -----------------------
Gary M. Munsinger                                        Anthony E. Maida
President                                                Chief Executive Officer


                                      -16-




                                   EXHIBIT A-1



         Invention:                 "Immunological Test for Prostate Cancer"

         INVENTORS:                 [*]



                                     Issued Patents

        Country                        Patent No.                 Issue Date
        -------                        ----------                 ----------

        Canada                         1,165,685                  04/17/84

        United States                  Re.  33,405*               10/23/90







*    A Reissue  Patent  issued on United  States  Patent No.  4,446,122,  issued
05/01/84,  which was issued on the basis of  PCT/US80/01708,  filed December 23,
1980, as a  continuation-in-part  of U.S.  Application  Serial No. 108,217 filed
December 28, 1979.




                                   EXHIBIT A-2


                                       [*]





                                   EXHIBIT B-1

                               September 20, 1979

                                    EXHIBIT I


Dr. Roger Herdman
State Department of Health and Health Research, Inc.
Tower Building
Empire State Plaza
Albany, New Jersey   12237

Dear Dr. Herdman:

         Re:  Your Institutional Patent Agreement

         This refers to the Institutional  Patent Agreement governing grants and
awards from this Department to your institution.

         By this letter, we are amending Section VII of the Agreement pertaining
to patent management  organizations to delete its limitation to nonprofit patent
management organizations. Please note that this does not change any of the other
requirements contained in that Section,  particularly the one requiring approval
by  this  Department  of  any  patent  administration   agreement  between  your
institution and a patent management organization.  Accordingly,  in Section VII,
line 4, please cancel "nonprofit."

         Section XI is also hereby  amended to change  September 30 in line 2 to
December  31 and June 20 in line 3 to  September  30.  This change will make the
annual reports coincide with the fiscal year.

         It would be appreciated if you would have the  responsible  official of
your  institution  sign  the  enclosed  copy of this  letter  to  indicate  your
concurrence and return it to this office at your convenience.

                                                     Sincerely yours,


                                                     /s/
                                                     ---------------------------
                                                     Leroy B. Randall
                                                     Acting Chief, Patent Branch

/s/
- ---------------------------------------
David Axelrod, M.D.
Commissioner
New York State Department of Health
and President and Chairman of the Board
Health Research, Inc.
October 9, 1979



                                                                [Illegible Date]


Roger C. Herdman, M.D.
Deputy Commissioner for Preventive Services
Research and Development
New York State Department of Health
Tower Building, Empire State Plaza
Albany, New York  12237

Dear Dr. Herdman:

         Reference  is made to  previous  correspondence  with  this  Department
regarding the desire of the New York State Department of Health to enter into an
Institutional  Patent  Agreement  with the  Department of Health,  Education and
Welfare.

         I have reviewed the policy and procedures of your  institution and find
them acceptable.  It appears,  therefore,  that the Now York State Department of
Health  will be in a  position  to  administer  inventions  under  the  enclosed
Institutional  Patent  Agreement  in a manner  fully  protective  of the  public
interest.

         It is  important  to  understand  that  Article V of the  Institutional
Patent  Agreement  provides that,  notwithstanding  the election by the New York
State  Department  of  Health  not to  retain  title to  domestic  rights  to an
invention covered by the Agreement, it is still required to report the invention
so that  disposition  of  such-rights  can be made by the  Department of Health,
Education and Welfare. Waiver of domestic rights to New York State Department of
Health employees is not provided for in the Agreement.

         Further,  it is believed that it would be to the mutual interest of the
New York State  Department  of Health and this  Department if you, as the person
responsible for patent matters at the Health  Department,  would arrange to meet
with Mr. Norman J. Latker,  Patent Counsel, to discuss problems that might arise
in the administration of the Agreement.

         In accordance  with the above,  I have signed the  Agreement  submitted
with your letter of April 7, 1976, and am returning a copy for your files.





         It is hoped that you will find this  Agreement a useful  instrument for
encouraging  further  development  for ultimate use by the public of  inventions
generated with HEW funds.

                                                  Sincerely yours,
                                 

                                                  /s/
                                                  ------------------------------
                                                  Theodore Cooper, M.D.
                                                  Assistant Secretary for Health

Enclosure
cc:      Dr. Robert P. Whalen
         New York State Dept. of Health


                                       -2-





                         INSTITUTIONAL PATENT AGREEMENT

                      GOVERNING GRANTS AND AWARDS FROM THE

                  DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE


         This Agreement,  made and entered into this 7th day of April , 1976, by
and  between the United  States of  America,  as  represented  by the  Assistant
Secretary (Health and Scientific Affairs) of the Department of Health, Education
and Welfare, hereinafter sometimes referred to as the Grantor, and
        NEW YORK STATE DEPARTMENT OF HEALTH

hereinafter referred to as the Grantee.

                                   WITNESSETH:

         WHEREAS,  the Regulations of the Department of Health,  Education,  and
Welfare,  covering inventions resulting from research grants, fellowship awards,
and contracts for research (45 CFR Parts 6 and 8),  provide in Secs. 8.1 through
8.5 that  upon  approval  by the  Assistant  Secretary  (Health  and  Scientific
Affairs),  the  ownership  and  disposition  of domestic  and foreign  rights to
inventions  arising out of activities  assisted by grants and awards may be left
to the Grantee  pursuant to its approved  established  patent policy,  with such
modifications as may be agreed upon; and

         WHEREAS,  the Grantee is desirous of entering into an agreement whereby
it has a first option to retain principal rights in and to administer inventions
made in the course of or under research  supported by grants and awards from the
Department  of  Health,  Education,  and  Welfare,  pursuant  to  the  aforesaid
Regulations; and

         WHEREAS,  the Assistant  Secretary (Health and Scientific  Affairs) has
reviewed  the patent  policy of the  Grantee as set forth in ITS  ADMINISTRATIVE
POLICIES & PROCEDURES MANUAL,  ITEM 455 ENTITLED  "IDENTIFICATION  AND REPORTING
INVENTIONS" effective 12/5/74 and its practices thereunder and has found them to
be acceptable, subject to the provisions of this Agreement, and that said policy
provides for administration by the Grantee of patents in the public interest and
is  consistent  with the stated  objectives  of the  President's  Statement  and
Memorandum of Government Patent Policy, issued October 10, 1963;

         NOW, THEREFORE,  in consideration of the foregoing,  the parties hereto
agree as follows:

I.       Scope of Agreement

         This Agreement shall define the rights of the parties hereto  regarding
disposition  of title to  inventions  made in the  course  of or under  research
supported by grants and awards from the Department


                                                      


of Health,  Education,  and Welfare,  which are subject to the Department Patent
Regulations and are issued after the date hereof.

II.      Definitions

         (a) The term "subject  invention" as used in this  Agreement  means any
process,  machine,  manufacture,  composition of matter or design, or any new or
useful  improvement  thereof,  and  any  variety  of  plant  which  is or may be
patentable  under the Patent Laws of the United  States made in the course of or
under  research  supported by grants and awards from the  Department  of Health,
Education, and Welfare.

         (b) The term "made" when used in relation to any invention or discovery
means its conception or first actual reduction to practice.

III.     Disposition of Principal Rights to Subject Inventions

         The Grantee shall have the right to elect to file patent application in
the United  States and in foreign  countries  on any  subject  invention  and to
administer such invention pursuant to the provisions of this Agreement.  Grantee
shall notify  Grantor at the time each subject  invention is reported to Grantor
as required by paragraph V hereof, if it intends to file patent  applications on
and to administer the invention. If Grantee does not elect to file a U.S. patent
application on and to administer a subject invention, it shall notify Grantor in
sufficient time to permit Grantor to file a U.S. patent application  thereon. In
such event,  all rights in and to such  invention,  except rights to any foreign
patent  application  filed by Grantee,  shall be subject to  disposition  by the
Grantor in accordance with its Regulations then in effect.

IV.      Supplementary Patent Agreements

         (a) The Grantee  shall obtain  patent  agreements  from all persons who
perform  any part of the work  under a grant or  award  from the  Department  of
Health,  Education,  and  Welfare,   exclusive  of  clerical  and  manual  labor
personnel,  requiring that such persons  promptly  report and assign all subject
inventions to Grantee or its approved patent management organization.

         (b) The Grantee shall  include the following  provision in any contract
it enters into involving  research  and/or  development for which DHELI research
grant or award funds are utilized.

         "The Contractor hereby agrees to report fully and promptly to NEW YORK,
         STATE DEPARTMENT OF HEALTH OR HEALTH RESEARCH, INC.
                                    (Grantee)


                                       -2-





         any  invention  conceived  or first  actually  reduced to  practice  in
         performance  of  this  contract   (hereinafter  referred  to  as  "such
         inventions", and to assign all right, title and interest in and to such
         invention to NEW YORK STATE  DEPARTMENT  OF HEALTH OR HEALTH  RESEARCH,
         INC.
                                    (Grantee)

         or its designee.

         "In addition, the Contractor agrees to furnish the following materials,
         disclosures and reports:

         (i) Upon request,  such duly executed instruments  (Prepared by the NEW
         YORK STATE DEPARTMENT OF HEALTH OR HEALTH RESEARCH, INC.
                                    (Grantee)

         or its designee) and such other papers as are deemed  necessary to vest
         in the NEW YORK STATE DEPARTMENT OF HEALTH OR HEALTH RESEARCH,  INC. or
         its designee the           (Grantee)

         rights  granted  under  this  clause  and to enable  the NEW YORK STATE
         DEPARTMENT OF HEALTH OR HEALTH RESEARCH, INC. or its 
                                    (Grantee)

         designee  to apply for and  prosecute  any patent  application,  in any
         country, covering such invention.

         (ii) Interim  reports on the first  anniversary  of this contract where
         extended  or  renewed  and  every  year  thereafter  listing  all  such
         inventions made during the period whether or not previously reported or
         certifying that no inventions wore conceived or first actually  reduced
         to practice during the applicable period.

         (iii)  Prior to  final  settlement  of this  contract,  a final  report
         listing all such inventions,  including all those previously  listed in
         interim  reports,  or certifying  that no inventions  were conceived or
         first actually reduced to practice under the contract.

V.       Report of Invention

         (a) The Grantee shall submit a written  invention report to the Grantor
of each subject invention promptly after conception or first actual reduction to
practice.

         (b) Such  invention  report shall be furnished  directly the Grantor in
addition to any other requirement under any grant or award for the submission of
progress or financial reports, and whether or not reference to subject invention
has been made in any  progress or other report  furnished  to the Grantor;  such
report shall include description of such invention, appropriately illustrated by
a simple  sketch or  diagram,  to permit  the  invention  to be  understood  and
evaluated, and such other information as Grantor may require.


                                       -3-





         (c) The report shall specify  whether or not Grantee  intends to file a
U.S.  patent  application  or any foreign  patent  application on the invention.
Notice  of an  election  not to file a U.S.  patent  application  shall be given
Grantor not less than ninety (90) days prior to the date a statutory bar becomes
effective.

         (d) If the Grantee  specifies that no U.S. patent  application  will be
filed (or having  specified  that it intends to file,  thereafter  notifies  the
Grantor to the contrary),  the Grantee shall promptly  inform the Grantor of the
date and identification of any known publication of subject invention made by or
known to the Grantee or, where applicable, of any contemplated publication to be
made by or known to the  Grantee.  and also the date  subject  invention  or any
embodiment  thereof was first in public use or on sale in the United  States and
shall  furnish  such other  information  (and have  executed  such  documents as
provided in VIII(F) as may be required to enable the Grantor to make disposition
of subject invention rights).

VI.  Administration  of  Inventions  on Which the Grantee  Elects to File Patent
     Applications

         (a) The Grantee shall require  assignment to it of all right, title and
interest in and to each subject  invention on which it elects to file any patent
application for administration by it in accordance with and subject to the terms
and conditions  herein set forth.  Assignments  from the inventor to the Grantee
under U.S. patent  applications  shall be promptly  obtained and recorded by the
Grantee  in the  United  States  Patent  Office,  and  copies  of  the  recorded
assignment shall be furnished to the Grantor.

         (b) The Grantee  shall grant to the  Government  of the United States a
nonexclusive, irrevocable, royalty-free license for governmental purposes and on
behalf of any foreign  government,  pursuant to any existing or future treaty or
agreement with the United States under each U.S. or foreign  patent  application
it elects to file on a subject invention.  The form of the license to be granted
shall be as set forth in Exhibit "A" attached hereto, and by this reference made
a part hereof.  Any license issued by Grantee shall be made expressly subject to
the license to the Government of the United States.

         (c) The Grantee shall administer  those subject  inventions to which it
elects to retain title in the public  interest and shall,  except as provided in
paragraph (d) below,  make them available  through  licensing on a nonexclusive,
royalty-free or reasonable royalty basis to qualified applicants.

         (d) The Grantee may license a subject  invention on an exclusive  basis
if it determines that  nonexclusive  licensing will not be effective in bringing
such  inventions to the commercial  market in a satisfactory  manner.  Exclusive
licenses  should be  issued  only  after  reasonable  efforts  have been made to
license on a nonexclusive  basis,  or where the grantee has  determined  that an
exclusive  license is necessary as an incentive for development of the invention
or where  market  conditions  art such as to require  licensing  on an exclusive
basis.  Any exclusive  license  issued by Grantee under a U.S.  patent or patent
application  shall be for a limited  period of time and such  period  shall not,
unless  otherwise  approved by the Assistant  Secretary  (Health and  Scientific
Affairs),  exceed three years from the date of the first  commercial sale in the
United  States of America of a product or process  embodying the  invention,  or
eight years from the date of the  exclusive  license,  whichever  occurs  first,
provided  that  the  licensee  shall  use  all   reasonable   effort  to  effect
introduction into the commercial market as soon as


                                       -4-





practicable,  consistent  with  sound  and  reasonable  business  practices  and
judgment. Any extension of the maximum period of exclusivity shall be subject to
approval of the Grantor.  Upon  expiration of the period of  exclusivity  or any
extension  thereof,  licenses shall be offered to all qualified  applicants at a
reasonable royalty rate not in excess of the exclusive license royalty rate.

         (e) Any license  granted by the Grantee to other than the Government of
the United States under any patent  application or patent on a subject invention
shall include adequate  safeguards against  unreasonable  royalty and repressive
practices.  Royalties  shall  not,  in any event,  be in excess of normal  trade
practice.  Such license shall also provide that all sales to the U.S. Government
shall be royalty free.

         (f) If permitted  by its patent  policies and the terns of the grant or
award under which an invention is made. the Grantee may share royalties received
with the  inventors,  provided that the Grantee shall not pay the inventors more
than (1) fifty  percent  (50%) of the first $3,000 gross  royalty paid under the
patent, (2) twenty-five percent (25%) of the gross royalty income between $3,000
and $13,000,  and (3) fifteen  percent  (15%) of the gross  royalty in excess of
$13,000. The balance of the royalty income after payment of expenses incident to
the  administration of all inventions  assigned to it pursuant to the provisions
of this Agreement  shall be utilized for the support of educational and research
pursuits.

         (g) All licenses  issued by the Grantee to other than the Government of
the United States under any patent  application or patent on a subject invention
shall be subject to the  conditions  of this  Agreement  and shall  specifically
reserve to Grantor those rights  specified in paragraph XII hereof.  The Grantee
shall, upon request,  promptly furnish copies of any license  agreements entered
into by it to the Department.

VII.     Patent Management Organizations

         The Grantee  shall not assign any subject  invention  to parties  other
than the Grantor in  circumstances  as set forth in this Agreement except it may
assign rights in the invention to a nonprofit  patent  management  organization,
provided that the patent administration  agreement between such organization and
Grantee is approved by the Grantor. Any reference to a Grantee in this Agreement
shall also  include a patent  management  organization  when  applicable  and an
assignment  to such an  organization  shall  be  subject  to all the  terms  and
conditions of this Agreement.

VIII.    Patent Applications

         (a) Grantee  shall  promptly  furnish  Grantor with a copy of each U.S.
patent application filed in accordance with this Agreement specifying the filing
date and the  serial  number.  Grantee  shall  promptly  notify  Grantor of each
foreign patent application  filed,  including filing date and serial number, and
shall furnish a copy of each application upon request.

         (b) Upon request, Grantee shall fully advise the Grantor concerning all
steps and  actions  taken  during  the  prosecution  of any  patent  application
covering a subject  invention  and shall,  upon request,  furnish  copies of any
final actions, amendments,  petitions, motions, appeals or other papers relating
to the prosecution of said application.



                                       -5-




         (c) Upon request,  the Grantee shall promptly furnish to the Grantor an
Irrevocable  power of attorney  granting the right to inspect and make copies of
any patent application covering a subject invention or any of the final actions,
amendments,  petitions,  motions,  appeals,  or  other  papers  relating  to the
prosecution of said application.

         (d) The Grantee  shall  include the  following  statement  in the first
paragraph of the specification  following the abstract of any patent application
filed on a subject invention:

         "The invention  described herein was made in the course of work under a
         grant or award from the Department of Health, Education, and Welfare."

         (e) The Grantee shall not abandon any U.S. patent  application filed on
a subject invention without first offering to transfer all rights in and to such
application to the Grantor not less than  forty-five (45) days prior to the date
a reply to the Patent  Office  action is due.  If the  Grantor  does not request
assignment  within  thirty (30) days of receipt of this  offer,  the Grantee may
permit the application to go abandoned.

         (f) If the Grantee  elects to file no patent  application or to abandon
prosecution of a U.S. patent application on a subject invention,  he shall, upon
request,  execute instruments or require the execution of instruments  (prepared
by the  Grantor)  and such other  papers as are deemed  necessary to vest in the
Grantor all right,  title and  interest in the subject  invention  to enable the
Grantor to apply for and prosecute patent applications in any country.

IX.      Invention Reports and Certifications

         Notwithstanding  the  provisions of this  Agreement,  the Grantee shall
provide invention reports and  certifications as may be required by the terms of
any grant or award.

X.       Disclosure-and Publication

         The Grantee shall not bar or prohibit  publication  of  disclosures  of
inventions on which patent applications have been filed.

         The Grantor shall have the right to publish and make  disclosure of any
information  relating  to any  subject  invention  whenever  deemed to be in the
public interest,  provided that upon request,  reasonable  opportunity  shall be
afforded the Grantee to file U.S. and foreign patent applications.

XI.      Reports on Development and Commercial Use

         The Grantee shall provide a written  annual report to the Department on
or before September 30 of each year covering the preceding year, ending June 30,
regarding the development and commercial use that is being mad or intended to be
made of all subject  inventions  left for  administration  by the Grantee.  Such
reports  shall  include  information  regarding  development,  the date of first
commercial sale, gross


                                       -6-




sales by licensees, gross royalties received by the Grantee, and such other data
and information as the Department may specify.

XII.     Additional Licenses

         (a) The  Grantee  agrees  that if it,  or its  licensee,  has not taken
effective  steps within  three years after a United  States  patent  issues on a
subject invention left for administration to the Grantee to bring that invention
to the point of practical application, and has not made such invention available
for licensing royalty-free or on terms that are reasonable in the circumstances,
and cannot show cause why he should  retain all right,  title and interest for a
further  period  of time,  the  Grantor  shall  have the  right to  require  (1)
assignment of said patent to the United  States,  as represented by the Grantor;
(2) cancellation of any outstanding exclusive licenses under said patent; or (3)
the granting of licenses  under said patent to an  applicant on a  nonexclusive,
royalty-free basis or on terms that are reasonable in the circumstances.

         (b) The  Grantor  reserves  the  right to  license  or to  require  the
licensing of other  persons  under any U.S.  patent or U.S.  patent  application
filed by the Grantee on a subject invention on a royalty-free  basis or on terms
that are reasonable in the circumstances,  upon a determination by the Assistant
Secretary  (Health and  Scientific  Affairs)  that the invention is required for
public  use by  governmental  regulations,  that the  public  health,  safety or
welfare requires the issuance of such  license(s),  or, that the public interest
would otherwise suffer unless such license(s) were granted.  The Grantee and its
licensees shall be given written notice of any proposed  determination  pursuant
to this  subparagraph not less than thirty (30) days prior to the effective date
of such determination,  and that if requested, shall be granted a hearing before
the determination is issued and otherwise made effective.

XIII.    Inventions by Federal Employees

         Notwithstanding any provision  contained in this Agreement,  inventions
made by Federal employees, or by Federal employees jointly with others, shall be
subject to disposition  under provisions of Executive  Orders,  Governmental and
Department Regulations applicable to Federal employees.

XIV.     Termination

         This Agreement may be terminated by either party for  convenience  upon
thirty (30) days written notice, Disposition of rights in, and administration of
inventions  made under grants or awards  entered into during and subject to this
Agreement  will not be affected by such a  termination  except that in the event
the  Department  terminates  this  Agreement  because of a failure or refusal by
Grantee to comply with its obligations under Articles V or VI of this Agreement,
the Department  shall have the right to require that the Grantee's entire right,
title and interest in and to the particular  invention with respect to which the
breach  occurred be assigned to the United States of America,  as represented by
the Secretary of the Department of Health, Education, and Welfare.



                                       -7-




XV.      Limitation

         It is agreed and understood  that this Agreement shall not apply to any
grants or awards issued under statutes  containing  requirements for disposition
of  invention   rights  with  which  the   provisions  of  this   Agreement  are
inconsistent.  It  is  further  agreed,  that  any  constituent  agency  of  the
Department  of Health,  Education,  and Welfare  may,  with the  approval of the
Assistant Secretary (Health and Scientific  Affairs),  provide as a condition of
any grant or award  that this  Agreement  shall  not apply  thereto.  It is also
agreed that any constituent agency of the Department of Health,  Education,  and
Welfare may provide,  subject to approval by the Assistant Secretary (Health and
Scientific  Affairs),  that this  Agreement  shall  apply to  specific  research
contracts.

         IN  WITNESS  WHEREOF,  each of the  parties  hereto has  executed  this
Agreement as of the day and year first above written.

                                     UNITED STATES OF AMERICA


                                     BY: /s/
                                         --------------------------------
                                     TITLE:  Asst. Secretary of Health
                                           ------------------------------


                                     NEW YORK STATE DEPARTMENT OF HEALTH
                                     ------------------------------------
                                                  (Grantee)


                                     BY: /s/
                                         --------------------------------
                                               Robert P. Whalen

                                     TITLE:    Commissioner of Health
                                           ------------------------------



                                       -8-





STATE OF NEW YORK)
CITY OF ALBANY   )  ss:
COUNTY OF ALBANY )

         On the 7th day of April,  1976,  before me  personally  came  ROBERT P.
WHALEN, M.D., to me known and known to me to be the same person who executed the
foregoing  instrument  for and on behalf  of the NEW YORK  STATE  DEPARTMENT  OF
HEALTH,  and who, being by me duly sworn, did depose and say, that he resides in
the  County of Albany,  State of New York,  and that he is  COMMISSIONER  of the
Department  of  Health  of the  State  of New  York,  and that he  executed  the
foregoing instrument for and on behalf of the State of New York by virtue of the
authority  vested  in  him in  Section  206 of the  Public  Health  Law as  such
COMMISSIONER of the Department of Health of the State of New York.

[Notary Stamp]

                                                       /s/
                                                       -------------------------
                                                       NOTARY PUBLIC



                                       -9-




                                   Exhibit "A"

                     LICENSE TO THE UNITED STATES GOVERNMENT

         WHEREAS,___________________________________________________________, of
                                     (Inventor)
___________________________________________________________________________, has

invented___________________________________________________________________, and
                                     (Invention)

filed a patent application thereon in___________________________________________
                                     (Country)

bearing Serial No.__________________________, filing date_______________________
and

         WHEREAS,  the invention was made In the course of research supported by
grant(s) from the Department of Health, Education, and Welfare; and

         WHEREAS,  the United States Government is entitled to certain rights in
and to said  invention and  application by reason of the terms of said grant(s);
and

         WHEREAS, the___________________________________________________________
                                  (Institution)

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

                                 NOW, THEREFORE:

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


                                   EXHIBIT B-2


                       Certification of Timothy J. Reckart



1.       Timothy J.  Reckart,  am General  Counsel and  Secretary  for  Research
         Corporation Technologies, Inc.

2.       I have  reviewed the  documents  included in Exhibit B-1,  namely,  the
         Institutional  Patent Agreement,  the Letter to Dr. Roger Herdman dated
         September 20, 1979, and the Letter to Roger Herdman dated  ("Received")
         August 2, 1976.

3.       I have caused such  documents to be retyped for clarity.  These retyped
         documents are included in this Exhibit B-2.

4.       Based on my review of the  documents  included in Exhibit  B-1, and the
         documents  included in Exhibit B-2, I certify  that,  to the best of my
         knowledge,  the documents shown in Exhibit B-2 are exact transcriptions
         of the typed portions of the documents appearing in Exhibit B-1.



- ------------------------------------------------------------
                  Timothy J. Reckart, Esq.
               General Counsel and Secretary
          Research Corporation Technologies, Inc.
- ------------------------------------------------------------

Date




                                                                    EXHIBIT 10.8


                                                                   DAD17-96-0072

                                LICENSE AGREEMENT


         Effective  upon  execution  of  this  agreement,  as  evidenced  by the
signature of both parties, the WALTER REED ARMY INSTITUTE OF RESEARCH (hereafter
LICENSOR),  as the  representative  of the United States of America,  and JENNER
TECHNOLOGIES,  (hereinafter LICENSEE), a corporation of the State of California,
having  a  principal  place  of  business  at  828  Eastbrook  Court,  Danville,
California 94506, agree as follows:


                                    ARTICLE I

                                   BACKGROUND

         1.01 The United  States of America  is the owner by  assignment  of the
entire right, title and interest to inventions described and claimed in [*].

         1.02 Under the  authority of 15 United  States Code 3710a and 35 United
States Code  section  207,  LICENSOR  has custody of  inventions  described  and
claimed  in,  and  the  right  to  issue  licenses  under  the  LICENSED  PATENT
APPLICATION.

         1.03 LICENSOR desires that the inventions  described and claimed in the
LICENSED PATENT APPLICATION be brought to the POINT OF PRACTICAL  APPLICATION in
the shortest possible time and made available to the public, thereby serving the
public interest and broadening the potential  supply bass for LICENSOR and other
Government agencies.

         1.04  LICENSEE  desires  to obtain a  non-exclusive  license  under the
LICENSED PATENT  APPLICATION  for the purpose of developing and  commercializing
products to be used in vaccine therapy of persons with cancer.

         NOW  THEREFORE,  in  consideration  of  the  foregoing,  including  the
above-cited  patent  licensing  statutes and the mutual promises and obligations
hereinafter set forth, LICENSOR and LICENSEE, intending to be lawfully bound, do
hereby agree as set forth below.


                                   ARTICLE II

                                   DEFINITIONS

         2.01 Terms in this  Agreement  (other than names of parties and Article
headings)  which  are  set  forth  in  upper  case  letters  have  the  meanings
established for such terms in the succeeding paragraphs of this ARTICLE II.










         2.02  LICENSED  PATENT  APPLICATION  means  the [*] and all  divisions,
continuations,  continuations-in-part,  and substitutions  thereof;  all foreign
patent applications  corresponding to the preceding  applications;  and all U.S.
and foreign  patents  issuing on any of the  preceding  applications,  including
extensions, reissues, and reexaminations.

         2.03  LICENSED  PRODUCTS  AND METHODS  means any and all  products  and
methods which employ or are produced by inventions  described and claimed in the
LICENSED PATENT APPLICATION.

         2.04 ROYALTY-BASE PRODUCTS means any and all products which either fall
within the scope of one or more VALID CLAIM of the LICENSED PATENT  APPLICATION,
or are  produced by the  practice  of a method  claimed in the  LICENSED  PATENT
APPLICATION in the country of manufacture or sale by LICENSOR,  its AFFILIATE(S)
or sublicensees.

         2.05 LICENSED TERRITORY means the world.

         2.06 GOVERNMENT shall mean the Federal  Government of the United States
of America.

         2.07 LICENSOR's  REPRESENTATIVE means the Command Judge Advocate,  U.S.
Army  Medical  Research and  Materiel  Command,  ATTN:  MCMR-JA,  Fort  Detrick,
Frederick, Maryland 21702-5012.

         2.08 POINT OF PRACTICAL  APPLICATION means [*] described and claimed in
the LICENSED PATENT APPLICATION,  under such conditions as to establish that the
inventions [*] this Agreement, and to continue during the term of this Agreement
[*].

         2.09  AFFILIATE(S)  means any corporation,  firm,  partnership or other
entity  which,  whether  de jure  or de  facto,  directly  or  indirectly,  owns
LICENSEE, is owned by LICENSEE or is under common ownership with LICENSEE to the
extent of at least fifty percent (50%) of the equity having the power to vote on
or direct the affairs of the entity and any  corporation,  firm,  partnership or
other entity  actually  controlled  by LICENSEE,  controlling  LICENSEE or under
common control of LICENSEE.

         2.10 NET SALES means the amount billed,  invoiced, or received on sales
of any ROYALTY-BASE PRODUCTS by LICENSEE,  its AFFILIATES,  and sublicensees or,
in the event of disposal of any ROYALTY-BASE  PRODUCTS other than as scrap prior
to shipment from its place of manufacture or predisposal  storage, or other than
by sales, the amount billed,  invoiced, or received on sales for a like quantity
and quality of ROYALTY-BASE  PRODUCTS to an independent  third party on or about
the time of such disposal, less:

                  a.   customary   trade,   quantity  or  cash   discounts   and
nonaffiliated brokers' or agents' commissions actually allowed and taken;

                  b.  amounts  repaid or  credited  by reason of  rejections  or
returns; and

                                       -2-






                  c.  any  freight  or  other  transportation  costs;  insurance
charges;  import, export, sales taxes, duties, tariffs, and all sales and excise
taxes based on sales or turnover or delivery of ROYALTY-BASE PRODUCTS subject to
this Agreement.

                  Sales  between  or  among  LICENSEE  and its  AFFILIATE(S)  or
sublicensees  shall be excluded from the  computation  of NET SALES except where
such AFFILIATE(S) or sublicensees are end users, but NET SALES shall include the
subsequent final sales to third parties by such AFFILIATE(S) and sublicensees.

         2.11 IMPROVEMENT means any modification of any invention, described and
claimed in the LICENSED  PATENT  APPLICATION,  provided  such  modification,  if
unlicensed,   would  infringe  one  or  more  claims  of  the  LICENSED   PATENT
APPLICATION.

         2.12  VALID  CLAIM  means a claim of an  issued  and  unexpired  patent
included  within  the  LICENSED  PATENT  APPLICATION  which  has not  been  held
unenforceable  or invalid by a court or other  governmental  agency of competent
jurisdiction,  and which has not been  admitted  to be invalid or  unenforceable
through reissue, disclaimer or otherwise.

         2.13  CONFIDENTIAL  INFORMATION  shall  mean  (i) any  proprietary  or,
confidential  information  or material in tangible form  disclosed in accordance
with this Agreement that is marked "confidential" at the time it is delivered to
the receiving party, or (ii) proprietary or confidential  information  disclosed
orally  hereunder  which is  identified  as  confidential  or  proprietary  when
disclosed  and such  disclosure  of  confidential  information  is  confirmed in
writing within thirty (30) days by the disclosing party.


                                   ARTICLE III

                                  LICENSE GRANT

         3.01 The LICENSOR grants to the LICENSEE a non-exclusive  license under
the  LICENSED  PATENT  APPLICATION,  with  the  right  to  grant  and  authorize
sublicenses,  to  make,  have  made,  import,  use,  offer  for  sale  and  sell
ROYALTY-BASE PRODUCTS AND METHODS throughout the LICENSED TERRITORY for the term
of this  Agreement  and for the purpose  stated in Paragraph  1.04 of ARTICLE I.
LICENSEE shall have the right to extend this license to any  AFFILIATE(S) of its
choice  provided that it shall first notify  LICENSOR in writing of the identity
and relationship of any AFFILIATE(S) to be included under this Paragraph 3.01.

         3.02 No right or license is  granted  or  implied  to  LICENSEE  or any
person claiming  through LICENSEE under any patent or patent  application  other
than that specifically identified herein as the LICENSED PATENT APPLICATION.

         3.03 The LICENSEE grants to the LICENSOR a royalty-free,  nonexclusive,
worldwide license to practice and have practiced on behalf of the United States,
and on behalf of any foreign


                                       -3-






government  or  international  organization  pursuant to any  existing or future
treaty or agreement with the United States, any IMPROVEMENT made by LICENSEE for
the term set forth in ARTICLE XI of this Agreement.


                                   ARTICLE IV

                              ROYALTIES AND PAYMENT

         4.01  LICENSEE  shall pay  LICENSOR  a royalty  on the NET SALES of all
ROYALTY-   BASE  PRODUCTS  of  LICENSEE  and  its  included   AFFILIATE(S)   and
sublicensees sold to third- parties or otherwise disposed of within the LICENSED
TERRITORY. The royalty rate for all ROYALTY-BASE PRODUCTS shall be [*].

         4.02 No  royalty  shall be  payable  under  paragraph  4.01  above with
respect to sales of ROYALTY-BASE PRODUCTS among LICENSEE and its AFFILIATE(S) or
Sublicensees,  nor shall a royalty be payable under this Article IV with respect
to ROYALTY-BASE PRODUCTS distributed for use in research and/or development,  in
clinical trials, or as promotional samples.

         4.03  Royalties  due  under  this  Article  IV  shall be  payable  on a
country-by-country and ROYALTY-BASE  PRODUCT-by-ROYALTY-BASE PRODUCT basis until
the  expiration  of  the   last-to-expire   issued  VALID  CLAIM  covering  such
ROYALTY-BASE  PRODUCT  in such  country,  (or if no such  patent has issued in a
country in which an application is pending,  until the fifth  anniversary of the
first commercial sale of a ROYALTY-BASE PRODUCT in such country).

         4.04 If it is determined by a competent  court, or by mutual  agreement
of the parties  hereto,  that  LICENSEE must avoid  infringement  by acquiring a
license  from  another  party in the course of  practicing  LICENSOR's  LICENSED
PATENT  APPLICATION,  then  LICENSEE  may offset any amounts  paid to such third
party against royalties due LICENSOR, [*].

         4.05 For prototype products in the early part of the product life cycle
before sales to third parties, instead of NET SALES, milestone payments shall be
required at certain stages of the product development cycle.  LICENSEE shall pay
LICENSOR according to the following schedule:

                  a.       LICENSEE shall pay to LICENSOR [*].

                  b.       LICENSEE shall pay to LICENSOR [*].

                  c.       LICENSEE shall pay to LICENSOR [*].

         4.06 Royalties shall be payable in United States dollars, paid by check
to the "Finance and  Accounting  Officer,  U.S.  Army Research  Laboratory"  and
mailed to Commander,  U.S. Army Research  Laboratory,  ATTN:  AMSRL-OP-RM-FA-DI,
2800 Powder Mill Road, Adelphi, Maryland 20783-1145.  All checks and bank drafts
shall be drawn on United States banks.


                                       -4-






         4.07 For purposes of converting  currencies  other than U.S. Dollars to
U.S.  Dollars,  the current exchange rate as reported in the Wall Street Journal
under the column headed  "Currency  Trading" and subtitled  "Exchange Rates" for
the last Tuesday of the  calendar  quarter in which the sales were made shall be
used. Any and all loss of exchange,  value,  taxes or other expenses incurred in
the transfer or conversion of other  currency to United States  dollars shall be
paid entirely by LICENSEE.

         4.08 In the event that LICENSEE is unable,  as a result of any legal or
government  restrictions  to remit  royalties  from any country in the  LICENSED
TERRITORY  in respect  of sales in that  country,  LICENSEE  shall  deposit  the
appropriate  royalties  in an  account  in a bank in such  country  agreed to by
LICENSOR,  such agreement not to be unreasonably withheld. For as long as such a
restriction  applies,  LICENSEE shall be relieved of any further  obligations to
LICENSOR in respect of such royalties except that of reporting to LICENSOR under
ARTICLE V concerning the amount of royalty payable and so deposited.

         4.09  LICENSEE  shall pay  royalties  accrued for sales made subject to
such royalties to include sales by its  AFFILIATE(S)  and sublicensees not later
than [*].  LICENSEE shall submit with its payment the written report required in
ARTICLE V, paragraph 5.03 of this Agreement. If no royalties are due, the report
shall so state.  Sales  shall be  considered  to be made,  for  purposes of this
paragraph,  when billed out, except that upon any termination of this Agreement,
all  shipments  made on or  prior  thereto  shall  be  considered  as sold  (and
therefore subject to royalty).  Royalties paid on sales of ROYALTY-BASE PRODUCTS
which are not accepted by the customer shall be credited to LICENSEE.

         4.10 LICENSEE  shall pay within [*] any  termination  of this Agreement
royalties accrued or accruable for payment at the time of any such termination.

         4.11 Royalty payments not received by LICENSOR by the due date shall be
subject to interest charges computed at [*].

         4.12 No royalty shall be payable under this  Agreement for direct sales
of ROYALTY- BASE  PRODUCTS by LICENSEE to the  GOVERNMENT or any of its agencies
for  governmental  purposes  or for sales  made for the  purpose  of  conducting
clinical trials.


                                    ARTICLE V

                               REPORTS AND RECORDS

         5.01  LICENSEE  agrees  to keep  records  showing  the  sales  or other
disposition  of  ROYALTY-BASE  PRODUCTS sold or otherwise  disposed of under the
license  granted  in  this  Agreement.  Such  records  shall  be  maintained  as
CONFIDENTIAL INFORMATION of LICENSEE.  Records should be in sufficient detail to
enable the  royalties  payable  hereunder  by  LICENSEE  to be  determined,  and
LICENSEE further agrees to permit its books and records to be examined, upon [*]


                                       -5-






prior  written  notice once per calendar  year for the sole purpose of verifying
the accuracy of LICENSEE's  payments and compliance  with this  Agreement,  such
examination to be made at the expense of the LICENSOR by an auditor or certified
public  accountant  appointed by LICENSOR who shall be reasonably  acceptable to
LICENSEE,  or, at the  expense of  LICENSEE,  by a certified  public  accountant
appointed  by LICENSEE  who shall be  reasonably  acceptable  to  LICENSOR.  The
auditor shall enter into a reasonable  confidentiality  agreement  with LICENSEE
and shall report to LICENSOR only whether there has been a royalty  underpayment
and, if so, the amount thereof. Such access shall be permitted during LICENSEE'S
normal  business  hours during the term of this  Agreement and for [*] after the
expiration or termination of this Agreement.

         5.02  Prior to the  first  commercial  sale of  ROYALTY-BASE  PRODUCTS,
LICENSEE  shall provide [*] progress  reports  within [*] of the end of each [*]
detailing its efforts, and the efforts of all AFFILIATE(S) and sublicensees,  to
bring the  inventions  licensed  under this  Agreement to the POINT OF PRACTICAL
APPLICATION.  These reports shall contain reasonably  sufficient  information to
substantiate that LICENSEE's development plan is being executed (see Application
for License to Practice  Government-Owned  Invention attached hereto as Appendix
A). No further annual  progress  reports will be required after  notification of
the first commercial sale of ROYALTY- BASE PRODUCTS unless  otherwise  requested
by LICENSOR.

         5.03 Concurrently with each payment of royalties as required in ARTICLE
IV,  paragraph 4.09, of this  Agreement,  LICENSEE shall submit a written report
setting forth for the preceding [*] reporting  period the amount of ROYALTY-BASE
PRODUCT  made,  used,  sold  or  otherwise  disposed  of  by  LICENSEE  and  its
AFFILIATE(S) and sublicensees in the LICENSED TERRITORY,  the NET SALES thereof,
and the amount of royalties  due thereon.  If no royalties  are due LICENSOR for
any report period, the report shall so state.

         5.04 The  reports  required  under  this  ARTICLE V shall  also be made
within [*] of the termination of this Agreement concurrently with any payment of
royalties required under ARTICLE IV, paragraph 4.10.


                                   ARTICLE VI

                                       [*]

         6.01 [*] during the term of this  Agreement [*] to  submission  to, and
approval [*], which approval shall not be unreasonably  withheld. [*] shall make
reference  to this  Agreement  including  those  [*]. A copy of any [*] shall be
furnished to [*] promptly after its execution.

         6.02 [*] paid by an [*] be payable to [*].

         6.03  Modification or termination  under ARTICLE XI paragraph 11.03, or
any of the provisions  this Agreement  shall [*],  provided that [*] by advising
[*], within sixty (60) days of the [*]


                                       -6-






receipt of written notice of such [*] contain provisions  corresponding to those
of this paragraph respecting [*] and termination and the conditions of [*].


                                   ARTICLE VII

                              LICENSEE PERFORMANCE

         7.01 LICENSEE  shall expend  reasonable  efforts and resources to carry
out the development  and marketing of the  inventions,  described and claimed in
the LICENSED PATENT APPLICATION.

         7.02  After  bringing  the  inventions,  described  and  claimed in the
LICENSED  PATENT  APPLICATION,  to the  POINT OF  PRACTICAL  APPLICATION  in the
LICENSED  TERRITORY,  LICENSEE  agrees to keep  LICENSED  PRODUCTS  AND  METHODS
available to the public on reasonable  terms during the term of this  agreement.
LICENSEE shall promptly report  discontinuance of its making the benefits of the
inventions reasonably accessible to the public.

         7.03  Failure  to comply  with the terms of this  ARTICLE  VII shall be
cause for  modification  or termination of this Agreement in accordance with the
provisions of ARTICLE XI below.


                                  ARTICLE VIII

                                    MARKINGS

         8.01 LICENSEE and its AFFILIATES  shall  identify,  within a reasonable
period of time,  ROYALTY-BASE  PRODUCTS  with the marking  "Licensed  Under U.S.
Patent (number)" or "U.S. Patent Pending" as permitted or required by statute or
identify product as patented in any promotional literature used.

         8.02 The name of the GOVERNMENT employee  inventor(s),  the name of the
agency or department of the  Government or any adaptation of the above shall not
be  used  in any  promotional  activity  without  prior  written  approval  from
LICENSOR.


                                   ARTICLE IX

                               PATENT ENFORCEMENT

         9.01 LICENSOR and LICENSEE  shall notify each other promptly in writing
of any  infringement of the LICENSED PATENT  APPLICATION  which becomes known to
either of them.  LICENSEE shall notify LICENSOR  promptly of any action taken in
accordance with this ARTICLE VIII to prevent or eliminate such infringement.


                                       -7-





         9.02 Upon  receipt by either party of a notice of  infringement  of the
LICENSED PATENT APPLICATIONS, LICENSOR shall have the responsibility to, enforce
the LICENSED  PATENT  APPLICATION.  If any unlicensed  third party infringes the
LICENSED  PATENT  APPLICATION,  AND LICENSOR fails to bring an action to enforce
the  LICENSED  PATENT  APPLICATION  within  one  hundred  eighty  (180)  days of
receiving  notice of such an  infringement,  no further  royalties  shall be due
under this Agreement until the infringement has ceased.


                                    ARTICLE X

                              RESERVATION OF RIGHTS

         10.01 The  license  granted in ARTICLE III of this  Agreement  shall be
subject to the irrevocable, royalty-free right of the GOVERNMENT to practice the
inventions,  described and claimed in the LICENSED PATENT APPLICATION, on behalf
of the United States and on behalf of any foreign  government  or  international
organization  pursuant to any existing or future  treaty or  agreement  with the
United  States,  including  the  right to  engage  in  research  on  inventions,
described and claimed in the LICENSED PATENT  APPLICATION,  either alone or with
one or more third parties.


                                   ARTICLE XI

                              TERM AND TERMINATION

         11.01 The term of this Agreement  begins with its effective date as set
forth in the  heading  paragraph  located  above  ARTICLE I and,  unless  sooner
terminated in accordance with this ARTICLE XI, shall run until the expiration of
the last to expire patent within the LICENSED PATENT APPLICATION,  including any
extensions granted under the Patent Term Restoration Act or any other statute.

         11.02 The LICENSOR may modify or terminate this license, in whole or in
part, if:

                  a.  LICENSEE  or any of its  sublicensees  fails  to meet  the
obligations set forth in ARTICLE VII above;

                  b. The  LICENSOR  determines  that such action is necessary to
meet requirements for public use specified by Federal  regulations  issued after
the date of this Agreement and such requirements are not reasonably satisfied by
the LICENSEE;

                  c. The LICENSEE has  willfully  made a false  statement of, or
willfully omitted,  a material fact in the license  application or in any report
required by this Agreement;



                                       -8-






                  d. The LICENSEE commits a substantial  breach of a covenant or
agreement contained in this Agreement;

                  e. The  LICENSEE  defaults  in making  any  payment  or report
required by this Agreement;

                  f. The  LICENSEE  is  adjudged  a  bankrupt  or has its assets
placed in the hands of a receiver or makes any assignment or other accommodation
for the benefit or creditors; or

                  g. The  LICENSEE  or any of its  AFFILIATE(S)  or  sublicensee
misuses the LICENSED PATENT APPLICATION.

         11.03 Prior to any modification or termination of this Agreement, other
than by mutual  agreement,  LICENSOR shall furnish LICENSEE and any AFFILIATE(S)
and sublicensees of record a written notice of intention to modify or terminate,
and the LICENSEE and any notified AFFILIATE(S) and sublicensees shall be allowed
ninety  (90) days after the date of such  notice to remedy the breach or default
of any  covenant  or  agreement  of this  Agreement  or to show  cause  why this
Agreement should not be modified or terminated.

         11.04 The word  "termination"  and  cognate  words,  such as "term" and
"terminate,"  used in this ARTICLE XI and elsewhere in this  Agreement are to be
read,  except where the contrary is  specifically  indicated,  as omitting  from
their effect the  following  rights and  obligations,  all of which  survive any
termination  to the degree  necessary to permit their  complete  fulfillment  or
discharge:

                  a.  LICENSEE's  obligation  to  supply a  terminal  report  as
specified in ARTICLE V, paragraph 5.04, of this Agreement;

                  b.  LICENSOR's  right to  receive or  recover  and  LICENSEE's
obligation to pay royalties  accrued or accruable for payment at the time of any
termination as specified in ARTICLE IV, paragraph 4.10, of this Agreement;

                  c.  LICENSEE's  obligation to maintain  records and LICENSOR's
right to conduct a final audit as provided in ARTICLE V of this Agreement;

                  d. Licenses,  releases, and agreements of nonassertion running
in favor of  customers  or  transferees  of LICENSEE in respect to  ROYALTY-BASE
PRODUCTS sold or transferred by LICENSEE prior to any  termination  and on which
royalties shall have been paid as provided in ARTICLE IV of this Agreement; and

                  e. Any  cause of  action or claim of  LICENSOR  accrued  or to
accrue, because of any breach or default by LICENSEE.


                                       -9-






         11.05 Either party shall have the right to terminate  this Agreement by
giving written notice thereof if the other party materially  breaches the terms,
covenants,  and  conditions  hereof,  and fails to correct such material  breach
within ninety (90) days after such party has been given written notice  thereof.
Such termination shall take place upon expiration of the ninety (90) day period.
The notice of termination shall specify the breach alleged to have occurred.

         11.06 In the event of  termination  of this  Agreement or conversion of
the license granted hereunder, any sublicense of record granted pursuant to this
Agreement  may, at  sublicensee's  option,  be converted  to a license  directly
between sublicensee and LICENSOR in accordance with the provisions of ARTICLE VI
herein.

         11.07 LICENSEE will have the right to terminate this Agreement, with or
without cause,  at any time effective sixty (60) days after written notice as to
any patent application or patent within the LICENSED PATENT APPLICATION.

         11.08 In the event of any  termination  of this  Agreement  under  this
Article XI (other than upon  expiration of the term specified in paragraph 11.01
hereof),  LICENSEE,  its AFFILIATE(S) and sublicensees  shall be permitted for a
period of ninety (90) days,  to complete the sale of its  existing  inventory of
ROYALTY-BASE PRODUCTS and LICENSOR shall be entitled to the payment of royalties
as provided in Article IV, paragraph 4.10 with respect thereto.


                                   ARTICLE XII

                       ACKNOWLEDGMENTS AND REPRESENTATIONS

         12.01  LICENSOR  acknowledges  that:  (i) it is the sole and  exclusive
owner of all right, title and interest in the LICENSED PATENT APPLICATION;  (ii)
it has the  right to grant the  rights  and  licenses  granted  herein,  and the
LICENSED PATENT APPLICATION is free and clear of any lien, encumbrance, security
interest or restriction on license;  (iii) it has not  previously  granted,  and
will not grant during the term of this Agreement any right, license, or interest
in and to the LICENSED PATENT APPLICATION, or any portion thereof,  inconsistent
with the license granted to LICENSEE herein;  (iv) to the best of its knowledge,
no other  intellectual  property  owned by LICENSOR is necessary to practice the
LICENSED PATENT APPLICATION; and (v) there are no threatened or pending actions,
suits, investigation,  claims or proceedings in any way relating to the LICENSED
PATENT APPLICATION.

         12.02  LICENSEE  represents  and warrants that: (i) it is a corporation
duly  organized,  validly  existing and in good  standing  under the laws of the
State of California;  and (ii) the execution,  delivery and  performance of this
Agreement  have been duly  authorized by all necessary  corporate  action on the
part of LICENSEE.



                                      -10-






                                  ARTICLE XIII

                                     GENERAL

         13.01 This  Agreement  shall not be transferred or assigned by LICENSEE
to any party  other than to a  successor  or  assignee  of the  entire  business
interest of LICENSEE without the approval of LICENSOR'S REPRESENTATIVE.

         13.02 This  Agreement  does not confer any  immunity  from or  defenses
under the antitrust laws, the laws and regulations pertaining to or administered
by the Food and  Drug  Administration,  or the  export  laws nor does it  confer
immunity from a charge of patent misuse. Furthermore,  LICENSEE'S, AFFILIATE(S),
or sublicensee's  acquisition and exercise of rights hereunder are not immunized
from the  operation  of any state or Federal  law by reason of the source of the
grant.  This  Agreement  does not  constitute an  endorsement by LICENSOR of any
ROYALTY-BASE  PRODUCTS and LICENSEE  shall not state or imply in any medium that
such endorsement exists as the result of this Agreement.

         13.03  LICENSOR  makes  no  warranty,   express  or  implied,   or  any
representations  regarding the patentability,  validity or scope of the LICENSED
PATENT  APPLICATION or that LICENSED PATENT APPLICATION may be exploited without
infringing patents of third parties.

         13.04  LICENSEE,   its  AFFILIATE(S)   and   sublicensees   agree  that
ROYALTY-BASE PRODUCTS will be manufactured substantially in the United States in
compliance with 35 United States Code 209(b).

         13.05 The decision of  LICENSOR'S  REPRESENTATIVE  on any  requirement,
dispute, interpretation, modification, or termination of this Agreement shall be
reduced to writing and a copy mailed or otherwise  furnished  to LICENSEE.  Such
decision shall be final,  provided that LICENSEE may, within thirty (30) days of
receiving  notice of such decision,  submit a written appeal through  LICENSOR'S
REPRESENTATIVE  and the  Intellectual  Property Counsel of the Army to the Judge
Advocate  General,  Department of the Army,  Washington,  DC  20310-2207,  which
appeal  shall set forth in detail the decision  being  appealed and the basis of
the appeal and may include appropriate  supporting materials.  Implementation of
such decision shall be stayed pending a final resolution of such appeal. Pending
such final resolution, LICENSEE shall proceed diligently with the performance of
its obligations under this Agreement.

         13.06 Except as expressly  provided herein, the parties agree that, for
the term of this  Agreement  and for five (5) years  thereafter,  the  receiving
party shall keep  completely  confidential  and shall not  publish or  otherwise
disclose and shall not use for any purpose except for the purposes  contemplated
by this Agreement any CONFIDENTIAL INFORMATION furnished to it by the disclosing
party hereto  pursuant to this  Agreement,  except that it can be established by
the receiving party by competent proof that such CONFIDENTIAL INFORMATION:



                                      -11-






                    i. was  already  known to the  receiving  party,  other than
under an obligation of confidentiality, at the time of disclosure;

                    ii. was generally  available to the public or otherwise part
of the public domain at the time of its disclosure to the receiving party;

                    iii. became  generally  available to the public or otherwise
part of the public domain after its disclosure and other than through any act or
omission of the receiving party in breach of this Agreement; or

                    iv. was  subsequently  lawfully  disclosed to the  receiving
party by a person other than a party hereto.

         13.07  LICENSEE  may use or  disclose  information  disclosed  to it by
LICENSOR to the extent such  disclosure  is  reasonably  necessary  in filing or
prosecuting patent applications,  prosecuting or defending litigation, complying
with applicable governmental  regulations or otherwise submitting information to
tax or governmental authorities, conducting clinical trials, acquiring potential
investors who are bona fide  investment  banks and/or venture  capital firms, or
making a permitted  sublicense  or otherwise  exercising  its rights  hereunder,
provided that if LICENSEE is required to make any such  disclosure of LICENSOR'S
CONFIDENTIAL INFORMATION, other than pursuant to a confidentiality agreement, it
will give  reasonable  notice to LICENSOR of such  disclosure  and,  save to the
extent  inappropriate  in the  case of  patent  applications,  will use its best
efforts  to  secure  confidential  treatment  of such  information  prior to its
disclosure (whether through protective orders or otherwise).  LICENSEE agrees to
keep records of  confidentiality  agreements between itself and third parties in
accordance  with the treatment of CONFIDENTIAL  INFORMATION  given in ARTICLE V,
paragraph 5.01, above.

         13.08 The  parties  shall  notify  each  other of any  changes in name,
address, or business status, and any notice or report required to be given under
the  provisions of this  Agreement  shall be considered  duly given if mailed by
first class mail, postage prepaid and addressed as follows:

         a.  If to LICENSOR:    Command Judge Advocate
                                U.S. Army Medical Research and Material Command
                                ATTN: MCMR-JA
                                Fort Detrick Frederick, Maryland  21702-5012

         b.  If to LICENSEE:    Jenner Technologies, Inc.
                                828 Eastbrook Court
                                Danville, California 94506
                                Attention: Anthony E. Maida, III
                                           Chief Executive Officer


                                      -12-







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

         13.10 This Agreement  constitutes the entire understanding  between the
parties and neither party shall be obligated by any condition or  representation
other than those expressly stated herein or as may be subsequently  agreed to by
the parties hereto in writing.

         13.11 All prior reviews and approvals  required by  regulations  or law
have been obtained by the Command prior to the execution of this Agreement.  The
Command official executing this Agreement has the requisite  authority to do so.
Notwithstanding  the  delegation  of authority to execute this  Agreement to the
individual  designated,  the Secretary of the Army has reserved to the Assistant
Secretary of the Army (Research,  Development and  Acquisition)  the opportunity
provided  by 15 U.S.C.  Section  3710a(c)(5)(A),  to  disapprove  or require the
modification of this Agreement within 30 days of the date it is presented to him
or her by the Command.

         13.12 Failure of any party to enforce any term, covenant,  or condition
herein contained shall not be deemed to be a waiver of such term,  covenant,  or
condition herein contained.

         13.13  Neither  party  shall be in default  hereunder  by reason of its
delay in the  performance  of, or failure  to  perform,  any of its  obligations
hereunder,  other than  LICENSEE'S  obligations  to make payments to LICENSOR in
accordance with the terms of this Agreement, if such delay is caused by strikes,
acts of God or the public  enemy,  riots,  or without the fault or negligence of
the other party.  During the  pendency of such  intervening  event,  each of the
parties  shall  take all  reasonable  steps to  furnish  the  services  required
hereunder by other means,  and, in any event,  shall,  upon  termination of such
intervening event, forthwith resume obligations under this Agreement.



                                      -13-






         IN  WITNESS  WHEREOF,  each  of the  parties  hereto  has  caused  this
Agreement to be executed in triplicate originals by its duly authorized officers
or representatives.

                                     FOR LICENSEE:


                                     Anthony E. Maida, III
                                     -----------------------------------------
                                     CEO
                                     -----------------------------------------
                                     Jenner Technologies
                                     -----------------------------------------
                                     /s/ ANTHONY E. MAIDA
                                     -----------------------------------------

                                     Dated: February 22, 1996
                                           -----------------------------------

                                     Witness: Jackie A. Field
                                             ---------------------------------
                                     Dated: 2/22/96
                                           -----------------------------------

                                     FOR LICENSOR:


                                     /s/ ERNEST T. TAKAFUJI
                                     -----------------------------------------
                                     Ernest T. Takafuji, Colonel, MC
                                     -----------------------------------------
                                     Director
                                     -----------------------------------------
                                     Walter Reed Army Institute of Research
                                     -----------------------------------------

                                     Dated: 29 March 1996
                                           -----------------------------------


                                     Witness: Marvin Rogul
                                             ---------------------------------
                                     Dated: 29 March 1996
                                           -----------------------------------



                                      -14-





                                                                    EXHIBIT 10.9


                                                                  DAMD17-94-0773

                A COOPERATIVE RESEARCH AND DEVELOPMENT AGREEMENT

                                     BETWEEN

                            JENNER TECHNOLOGIES, INC.
                            TIBURON, CALIFORNIA 94920
                                   ("JENNER:)

                                       AND

                     WALTER REED ARMY INSTITUTE OF RESEARCH
                            WASHINGTON, DC 20307-5100
                                    ("WRAIR")


         A. WHEREAS the Federal  Technology  Transfer Act of 1986, 15 USC 3710a,
provides  each  Federal  agency with the  authority  to permit the  Directors of
Government-operated  Federal Laboratories to enter into cooperative research and
development  agreements  (CRDAs) with Federal  non-Federal  entities,  including
private firms and organizations.  This authority allows Federal  laboratories to
accept,  retain,  and  use  funds,   personnel,   services,  and  property  from
collaborating  parties  and to provide  personnel,  services,  and  property  to
collaborating  parties.  This authority also includes the  disposition of patent
rights  in any  inventions  which may  result  from  such  collaboration,  or by
delegation of the Assistant Secretary of the Army for Research,  Development and
Acquisition, other patent rights which are owned by the Government.

         B.  WHEREAS  WRAIR and JENNER  desire to  collaborate  in research  and
development on formulation of liposome-encapsulated vaccines.

         C.  WHEREAS  Title  41 Code of  Federal  Regulations  304  governs  the
acceptance of payment from  non-federal  sources for travel  expenses and is the
authority  for  receipt  of  in-kind  travel  expenses  contemplated  under this
Agreement.

         NOW, THEREFORE, the parties agree as follows:

ARTICLE 1.        DEFINITIONS

         As used in this Agreement, the following terms shall have the following
meanings and such meanings should be equally applicable to both the singular and
the plural forms of the terms defined:

         1.1  "Agreement"  means  this  Cooperative   Research  and  Development
Agreement.

         1.2  "Invention"  means any  invention or discovery  which is or may be
patentable or otherwise protected under Title 35 of the United States Code.



                                       -1-





         1.3 "Made" in relation to any Invention  means the  conception or first
actual reduction to practice of such Invention.

         1.4 "Proprietary  Information"  means JENNER  information marked with a
proprietary  legend or orally  disclosed  by JENNER which  embodies  proprietary
technical  information  or trade  secrets  which  is  confidential  business  or
financial information provided that such information:

                    (i) is not generally  known or available  from other sources
without obligations concerning their confidentiality;

                    (ii) has not been  made  available  by the  owners to others
without obligation concerning its confidentiality; and

                    (iii) is not already  available  to the  Government  without
obligation concerning its confidentiality.

         1.5 "Subject Data" means all recorded  information,  including  without
limitation, protocols, procedures, data and results, in any form, first produced
in the performance of this Agreement.

         1.6 "Subject  Invention" means any invention Made in the performance of
work under this Agreement.

Article 2.        Sponsored Research

         2.1 Scope of Work.  Sponsored  research  performed under this Agreement
shall be performed in accordance with the Statement of Work (SOW),  incorporated
as a part of this  Agreement  at  Appendix  A.  WRAIR  agrees to  provide  WRAIR
resources, facilities and equipment required for the performance of the SOW.

         2.2 Review of Work.  Quarterly  conferences shall be held between WRAIR
and JENNER personnel for the purpose of reviewing the progress of the work under
this Agreement.  It is understood that the nature of this sponsored  research is
such that completion within the period of performance  specified,  or within the
limits of financial support allocated, cannot be guaranteed.  Accordingly, it is
agreed that all sponsored  research will be performed by WRAIR on a best efforts
basis.

         2.3 Principal Investigator(s). Any work required by WRAIR under the SOW
will be performed under the direction of [*], who as  co-principal  investigator
has  responsibility  for the scientific and technical conduct of this project on
behalf of WRAIR.  Any work  required by JENNER  under the SOW will be  performed
under the direction of [*], who as co-principal  investigator has responsibility
for the scientific and technical conduct of this project on behalf of JENNER.



                                       -2-






         2.4 [*] agrees to [*] and be [*] to the  performance of work under this
Agreement.  The  parties  will  mutually  agree  upon the [*]  pursuant  to this
section.  [*] will be  solely  [*]  and,  in  performing  the  work  under  this
Agreement,  [*] but only those entitlements and benefits provided pursuant to an
employment  contract  between [*] will be a [*] who will be assigned  [*]. It is
understood  by [*] that this is a  commitment  of [*] and that such  employee is
required for the  performance  of the work.  [*] agrees to assign [*] to the [*]
and to  provide  the [*]  access to those [*] and  resources  necessary  for the
accomplishment of the SOW, consistent with the [*] internal management policies.
[*] agrees to continue the [*], even if this Agreement is terminated earlier.

         2.5  Scope  Change.  If at any time  either  co-principal  investigator
determines that the research data dictates a substantial change in the direction
of the  work,  the  parties  shall  make a good  faith  effort  to  agree on any
necessary change(s) to the SOW.

         2.6 Final Report.  The parties  shall  prepare a final  written  report
detailing  the Subject Data and the results and  achievements  of this  research
collaboration,  including,  without limitation,  any Subject Inventions,  within
three months after completing the SOW.

Article 3.        Financial Obligation

         3.1 Performance  Condition.  The performance of research by WRAIR under
this  Agreement  is  conditioned  on the  advance  payment  by JENNER of WRAIR's
partial  cost for the  performance  of the  research as provided in Section 3.2.
WRAIR shall not be obligated to perform any of the research  specified herein or
to take any other action  required by this  Agreement if the agreed to funds are
not deposited as required by this Article.

         3.2 Deposit Account.  JENNER shall pay a total of [*] to WRAIR upon the
execution of this  Agreement for the  performance  of the research  specified by
Article 2. Such funds  shall be  deposited  in  Department  of the Army  Special
Collaborative Agreement Account No. ______.

         3.3  Accounting  Records.  WRAIR shall  maintain  separate and distinct
current accounts,  records,  and other evidence  supporting all its expenditures
under this Agreement.  WRAIR shall provide JENNER a semiannual report accounting
for the use of JENNER's  funds and a final fiscal report within six months after
completing the SOW or ending its research and development  activities under this
Agreement.  The  accounts and records of WRAIR which are relevant to the conduct
of this project  shall be available  for  reasonable  inspection  and copying by
JENNER or its authorized representative at least once per year.

Article 4.        Title to Physical Property

         4.1 Physical Property. All materials or equipment developed or acquired
under this  Agreement  by the parties  shall be the  property of the party which
developed or acquired the property.



                                       -3-






ARTICLE 5.        PATENT RIGHTS

         5.1  Reporting.  Each party  shall  promptly  notify  each other of all
Subject  Inventions  reported  to either  party by its  employees  and provide a
detailed  written  description of each Subject  Invention within 30 days of when
any  Subject  Invention  is  Made.  All  Subject   Inventions  Made  during  the
performance  of this Agreement  shall be listed in the Final Report  required by
this Agreement.

         5.2 JENNER Subject Inventions. WRAIR, on behalf of the U.S. Government,
waives any ownership rights the U.S.  Government may have in Subject  Inventions
Made by JENNER  employees  and agrees that JENNER shall retain  ownership of and
title to any Subject  Inventions made solely by JENNER  employees.  JENNER shall
file patent  applications  on JENNER's  Subject  Inventions  at its own expense.
JENNER agrees to grant the U.S. Government a nonexclusive,  irrevocable, paid-up
license under its interest in any patents  covering a JENNER Subject  Invention,
to practice  or have  practiced,  such  patents  throughout  the world by, or on
behalf of the U.S. Government. Such nonexclusive license shall be evidenced by a
confirmatory  license  agreement  prepared by JENNER in a form  satisfactory  to
WRAIR.

         5.3 WRAIR Subject Inventions.  WRAIR, on behalf of the U.S. Government,
shall  retain  ownership  of and title to, and file  patents  on,  each  Subject
Invention  Made  solely by WRAIR  employees.  WRAIR  agrees  to grant  Jenner an
exclusive license to such Subject Inventions, pursuant to Section 5.7 herein.

         5.4 Joint Subject Inventions.  In the event that Subject Inventions are
made jointly by WRAIR and JENNER  employees,  each party shall have an undivided
interest in such Subject Inventions. WRAIR shall have the initial option to file
patents on each Subject  Invention  Made jointly by JENNER and WRAIR  employees.
WRAIR agrees to license to Jenner its entire  right,  title and interest in each
such joint Subject Invention,  pursuant to Section 5.7 herein.  JENNER agrees to
grant the U.S. Government a nonexclusive, irrevocable, paid-up license under its
interest in any patents covering a joint Subject Invention,  to practice or have
practiced,  such  patents  throughout  the  world  by,  or on behalf of the U.S.
Government.  Such  nonexclusive  license  shall be evidenced  by a  confirmatory
license agreement prepared by JENNER in a form satisfactory to WRAIR.

         5.5 Filing of Patent Applications. The party having the right to retain
title and/or file patent  applications on a specific Subject Invention may elect
not to file patent  applications,  provided it so advises the other party within
90 days from the date it  reports  the  Subject  Invention  to the other  party.
Thereafter, the other party may elect to file patent applications on the Subject
Invention at its own expense.

         5.6 Patent  Expenses.  The  expenses  attendant to the filing of patent
applications  shall be [*] shall provide [*] documents  retained in the official
patent application files by the applicable patent office. The parties [*] patent
applications resulting from this Agreement.

         5.7      Exclusive License.



                                       -4-






                  5.7.1 Grant. WRAIR, on behalf of the U.S.  Government,  hereby
agrees to grant to JENNER an exclusive  irrevocable license, with right to grant
and authorize sublicenses, to each U.S. and foreign patent application,  and any
division,    substitution,    continuation,    continuations-in-part   of   such
applications,  and any  patents  issued  thereon,  and any  renewal,  extension,
re-issue,  or re-examination  thereof,  covering a Subject  Invention,  which is
owned in whole or part by WRAIR on behalf of the U.S.  Government,  to  develop,
make, have made, use, sell, and have sold products and processes covered by such
patents and patent  applications,  subject to the reservation of a nonexclusive,
irrevocable,  paid-up  license  to  practice  and  have  practiced  the  Subject
Invention(s) on behalf of the U.S. Government.

                  5.7.2 Exclusive  License Terms.  JENNER shall elect or decline
to exercise its right to acquire an exclusive  license to any Subject  Invention
within [*] of being informed by WRAIR of the Subject Invention. The terms of the
license provided for in Section 5.7.1 shall be negotiated promptly in good faith
and in conformance with the laws of the United States but shall include at least
the following terms: (i) a royalty rate of [*] within the scope of a valid claim
of an issued  patent  claiming a Subject  Invention  jointly  owned by WRAIR and
JENNER;  (ii) a royalty  rate of [*]  within  the  scope of a valid  claim of an
issued patent  claiming a Subject  Invention owned solely by WRAIR. In addition,
such license  shall  provide for the payment of milestone  payments by JENNER to
WRAIR,  on a  product-by-product  basis,  of: (i) [*],  and (ii) [*];  provided,
however,  no milestone  payments  shall be required  with  respect to [*].  Such
license shall terminate,  on a country-by  country basis, upon the expiration of
any patents  licensed to Jenner pursuant to this Section 5.7, unless  terminated
earlier pursuant to the terms of such Agreement.

ARTICLE 6.        DATA AND PUBLICATION

         6.1 Rights.  Subject Data shall be jointly owned by the parties and may
be used by either  party,  subject to this Article 6. Either  party shall,  upon
request,  have the right to review and receive  copies of all Subject Data which
has not been delivered to the other party.

         6.2  Proprietary   Information.   WRAIR  agrees  that  any  Proprietary
Information   furnished  by  JENNER  to  WRAIR  under  this  Agreement,   or  in
contemplation  of this  Agreement,  shall be used,  reproduced  and disclosed by
WRAIR only for the  purpose of  carrying  out this  Agreement,  and shall not be
disclosed by WRAIR to third parties unless prior written  consent to the release
is obtained from JENNER.

         6.3 Release Restrictions. WRAIR shall have the right to use all Subject
Data for any U.S.  Governmental  purpose,  but shall not  release  Subject  Data
publicly  except:  (i) subject to Section 6.4,  WRAIR,  in reporting  results of
sponsored  research,  may publish  Subject Data in technical  articles and other
documents  to the extent it  determines  to be  appropriate;  and (ii) WRAIR may
release such Subject Data where such release is required by law or court order.

         6.4  Publication.  WRAIR  and  JENNER  agree  to  confer  prior  to the
publication  of any Subject Data to assure that no  Proprietary  Information  is
released and that patent rights are not


                                       -5-





jeopardized.  Prior to  submitting  an abstract or  manuscript  for review which
contains any Subject Data or results of the research under this Agreement,  each
party shall have [*] to review each such proposed  abstract or  manuscript.  Nor
shall WRAIR make any oral  disclosure of Subject Data to third  parties  without
providing  JENNER a written  description  of the topic and  contents of any such
proposed disclosure at least [*] in advance of any oral disclosure.

         6.5 FDA Documents.  If this Agreement  involves a product  regulated by
the U.S. Food and Drug  Administration  (FDA),  then the JENNER or the U.S. Army
Medical Research and Development Command, as appropriate,  may file Subject Data
or any  required  documentation  relating  to the SOW with  the  FDA;  provided,
however,  each party shall request that any such filings be treated confidential
to the maximum  extent  allowed by law. In addition,  the parties  authorize and
consent  to  allow  each  other or its  contractor  or agent  access  to,  or to
cross-reference, any documents filed with the FDA related to the product.

ARTICLE 7.        REPRESENTATIONS AND WARRANTIES.

         7.1  Representations  and Warranties of WRAIR.  WRAIR hereby represents
and warrants to JENNER as follows:

                  7.1.1 Organization.  WRAIR is a Federal laboratory of the U.S.
Army  Medical  Research  and  Development  Command  and is  wholly  owned by the
Government of the United States and whose substantial purpose is the performance
of research, development or engineering;

                  7.1.2 Mission.  The performance of the activities specified by
this Agreement are consistent with the mission of the WRAIR;

                  7.1.3  Authority.  All prior  reviews  and  approvals  of this
Agreement  required by  regulations  or law have been obtained by WRAIR prior to
the execution of this Agreement.  The WRAIR official executing this Agreement on
behalf  of WRAIR  has the  requisite  authority  to do so.  Notwithstanding  the
delegation of authority to execute this Agreement to the individual  designated,
the  Secretary of the Army has reserved to the  Assistant  Secretary of the Army
(Research, Development and Acquisition) the opportunity provided by 15 USC Sect.
3710a(c)(5)(A),  to disapprove  or require the  modification  of this  Agreement
within 30 days of the date it is presented to him or her by WRAIR;

                  7.1.4  Statutory   Compliance.   WRAIR's  Commander  prior  to
entering into this  Agreement has given special  consideration  to entering into
CRDAs with small business firms and consortia involving small business firms.

                  7.1.5 No  Conflicting  Agreements.  WRAIR  has not  previously
entered and during the term of this  Agreement will not enter any agreement with
any third  party  granting  rights  inconsistent  with  those  granted to JENNER
herein.



                                       -6-







         7.2 Representations and Warranties of JENNER.  JENNER hereby represents
and warrants to WRAIR as follows:

                  7.2.1 Corporate  Organization.  JENNER, as of the date hereof,
is a corporation duly organized, validly existing and in good standing under the
laws of the State of California;

                  7.2.2 Power and Authority.  JENNER has the requisite power and
authority  to enter into this  Agreement  and to perform  according to the terms
thereof;

                  7.2.3 Due Authorization. The Board of Directors of JENNER have
taken all actions required to be taken by law, JENNER's Charter,  Certificate or
Articles of Incorporation,  its bylaws or otherwise,  to authorize the execution
and delivery of this Agreement;

                  7.2.4 No  Violation.  To the best of JENNER's  knowledge,  the
execution  and  delivery of this  Agreement  does not  contravene  any  material
provision  of, or  constitute a material  default  under any material  agreement
binding on JENNER,  or any valid order of any court, or any regulatory agency or
other body having authority to which JENNER is subject.

ARTICLE 8.        TERMINATION.

         8.1  Termination  by  Mutual  Consent.  JENNER  and  WRAIR may elect to
terminate this Agreement, at any time by mutual consent.

         8.2  Termination by Unilateral  Action.  Either party may  unilaterally
terminate  this entire  Agreement at any time by giving the other party  written
notice, not less than 30 days prior to the desired termination date.

         8.3  Termination  Procedures.  In the event this  Agreement  terminates
before the SOW is completed,  the parties shall return to the other all property
or information,  including Proprietary  Information,  owned solely by the other.
Each party shall have the right to retain any joint property in its  possession;
provided, however, that any party in the sole possession of joint property shall
promptly provide the other party with a copy or sample of such joint property on
the  request  of the other  party.  Upon the  receipt  of a written  termination
notice,  the  parties  shall not make any new  commitments  that  relate to this
Agreement.

         8.4  Termination  Costs.  Within 90 days following  termination of this
Agreement,  WRAIR shall  submit a statement of all costs  incurred  prior to the
date of termination and for all termination costs. Any unspent funds provided to
WRAIR by  JENNER  shall be used to fund  reasonable  termination  costs  and any
remainder  returned to Jenner.  In the event funds are insufficient to cover all
of the termination costs, JENNER agrees to promptly meet with WRAIR to negotiate
a  settlement  agreement  regarding  the  payment  of any  remaining  reasonable
termination costs.

ARTICLE 9.        DISPUTES.


                                       -7-





         9.1  Settlement.  Any dispute arising under this Agreement which is not
disposed of by agreement of the  co-principal  investigators  shall be submitted
jointly  to the  signatories  of  this  Agree  ment.  A  joint  decision  of the
signatories  or  their  designees  shall  be the  disposition  of such  dispute.
Notwithstanding the above,  nothing in this section shall prevent any party from
pursuing  any and all  administrative  and/or  judicial  remedies  which  may be
allowable.

ARTICLE 10.   LIABILITY.

         10.1 Property.  Neither party shall be  responsible  for damages to any
property  provided  to,  or  acquired  by,  the  other  party  pursuant  to this
Agreement.

         10.2 JENNER's  Employees.  JENNER agrees to indemnify and hold harmless
the U.S.  Government  for any  loss,  claim,  damage  or  liability  of any kind
involving an employee of JENNER arising in connection  with this Agreement under
the  provisions  of the Federal Tort Claims Act,  except to the extent that such
loss,  claim,  damage or liability is due in whole or part to the  negligence or
wilful misconduct of WRAIR.

         10.3 No  Warranty.  Except as  specifically  stated  elsewhere  in this
Agreement,  WRAIR  makes  no  express  or  implied  warranty  as to  any  matter
whatsoever, including the conditions of the research or any Subject Invention or
product,  whether  tangible  or  intangible,   made,  or  developed  under  this
Agreement,  or the  ownership,  merchantability,  or  fitness  for a  particular
purpose of the research or any Subject Invention.

         10.4  Indemnification.  JENNER holds the U.S.  Government  harmless and
indemnifies the U.S. Government for all liabilities,  demands, damages, expenses
and losses  arising out of use by JENNER of research and technical  developments
solely owned by WRAIR developed  pursuant to this Agreement,  or out of any use,
sale or other  disposition  by JENNER of products  made by the use of  technical
developments  solely  owned  by  WRAIR  developed  pursuant  to this  Agreement;
provided,  however,  in no case shall JENNER be obligated to indemnify  WRAIR or
the U.S.  Government  for any amount in excess of the research funds provided by
JENNER  to WRAIR  pursuant  to this  Agreement.  This  provision  shall  survive
termination or expiration of this Agreement.

ARTICLE 11.   MISCELLANEOUS.

         11.1 No  Benefits.  No member  of, or  delegate  to the  United  States
Congress,  or resident  commissioner,  shall be admitted to any share or part of
this Agreement,  nor to any benefit that may arise therefrom; but this provision
shall not be  construed to extend to this  Agreement if made with a  corporation
for its general benefit.

         11.2 Governing Law. This Agreement shall be governed by the laws of the
United States Government.



                                       -8-







         11.3 Further  Assurances.  From time to time, either party shall at the
request of the other: (i) deliver to the other party such records, data or other
documents  consistent  with the provisions of this  Agreement;  (ii) execute and
deliver or cause to be delivered, all such consents,  assignments,  licenses, or
further  instruments  of  transfer as  provided  by the  Agreement  to allow the
parties to obtain the benefits provided for herein.

         11.4 Notices.  All notices  pertaining to or required by this Agreement
shall be in  writing  and shall be signed by an  authorized  representative  and
shall be delivered by hand or sent by certified mail, return receipt  requested,
with postage prepaid, addressed as follows:

         If to JENNER:          Anthony E. Maida, III
                                Chief Executive Officer
                                JENNER Technologies, Inc.
                                1895 Mountain View Drive
                                Tiburon, California 94920

         If to WRAIR:           Director
                                Walter Reed Army Institute of Research
                                ATTN: Office of Research Management
                                Washington, D.C.  20307-5100

Any party may  change  such  address by notice  given to the other  party in the
manner set forth above.

         11.5 Independent  Contractors.  The relationship of the parties to this
Agreement is that of independent  contractors and not as agents of each other or
as joint venturers or partners.

         11.6 Use of Name or Endorsements.  (i) JENNER shall not use the name of
WRAIR or the  Department of the Army on any product or service which is directly
or  indirectly  related  to either  this  Agreement  or any  patent  license  or
assignment agreement which implements this Agreement, without the prior approval
of WRAIR.  (ii) By  entering  into this  Agreement  WRAIR does not  directly  or
indirectly  endorse  any  product or service  provided,  or to be  provided,  by
JENNER,  its successors,  assignees,  or licensees.  JENNER shall not in any way
imply that this Agreement is an endorsement of such products or service.

         11.7 The rights specified in the provisions of this Agreement  covering
"Patent  Rights,"  "Data and  Publication,"  and  "Liability"  shall survive the
termination or expiration of this Agreement.

ARTICLE 12.       DURATION OF AGREEMENT AND EFFECTIVE DATE

         12.1 Expiration of Agreement.  This Agreement will automatically expire
on December 15, 1994, unless terminated earlier as provided by the terms of this
Agreement.

         12.2  Effective  Date.  This  Agreement  shall  enter  into force as of
December 15, 1993.


                                       -9-






         IN WITNESS  WHEREOF,  the  Parties  have caused  this  Agreement  to be
executed by their duly authorized representatives as follows:


For JENNER TECHNOLOGIES, INC.:


         10/20/93                      /s/ ANTHONY E. MAIDA
- -------------------------------        ---------------------------------------
Date                                   Anthony E. Maida, III
                                       Chief Executive Officer
                                       JENNER Technologies, Inc.


For the U.S. GOVERNMENT:


         30 September '93              /s/ AUGUST J. SALVADO
- -------------------------------        ---------------------------------------
Date                                   August J. Salvado
                                       Colonel, Medical Corps
                                       Director, Walter Reed Army Institute of
                                       Research



                                      -10-







Cooperative  Research  and  Development   Agreement  Between  WRAIR  and  JENNER
Technologies, Inc.


                                   APPENDIX A

                                STATEMENT OF WORK

[*]




                                       -1-







                                                                  DAMD17-94-0773

                             NOTICE OF MODIFICATION
                                       of
                 COOPERATIVE RESEARCH AND DEVELOPMENT AGREEMENT
                                     between
                     WALTER REED ARMY INSTITUTE OF RESEARCH
                                       and
                            JENNER TECHNOLOGIES, INC.


         WHEREAS,   the  Walter  Reed  Army  Institute  of  Research  ("WRAIR"),
Washington,  DC and Jenner Technologies,  Inc. ("JENNER"),  828 Eastbrook Court,
Danville,  California  94506-1206,  entered  into  a  Cooperative  Research  and
Development  Agreement  ("Agreement")  (Department  of the Army  Control  Number
9311-M-C318,  U.S. Army Medical  Research and Materiel  Command  Control  Number
DAMD17-94-0773)   on  December  15,  1993  for  research  and   development   on
"Formulation of Liposome-Encapsulated Vaccines," and inasmuch the parties desire
to modify the expiration date and the financial reimbursement  provisions of the
Agreement,

         NOW, THEREFORE, the parties agree as follows:

         1. In Article 12.1 of the Agreement,  the expiration date "December 15,
1994" is changed to read "December 15, 1997";

         2. Article 3.2 of the Agreement is changed to read as follows:

                  "3.2 Deposit Account:  JENNER shall reimburse WRAIR a total of
[*] for the performance of the research specified by Article 2. Such funds shall
be deposited in Department of the Army Special  Collaborative  Agreement Account
No. [to be named] as follows:

[*]










         IN WITNESS WHEREOF,  the parties have caused these  modifications to be
executed by their duly authorized representatives as follows:


                                       For JENNER TECHNOLOGIES, INC.:


                                       /s/ ANTHONY E. MAIDA, III
                                       ----------------------------------------
                                       Anthony E. Maida, III
                                       Chief Executive Officer

                                       Date: March 9, 1995
                                             ----------------------------------

                                       For the UNITED STATES GOVERNMENT:


                                       /s/ AUGUST J. SALVADO
                                       ----------------------------------------
                                       August J. Salvado
                                       Colonel, Medical Corps
                                       Director, Walter Reed Army Institute of
                                       Research

                                       Date: 17 March '95
                                             ----------------------------------





                                       -2-









                                                                   EXHIBIT 10.10



                         EXECUTIVE EMPLOYMENT AGREEMENT


         This Executive  Employment  Agreement is signed as of November 20, 1994
("Execution  Date"), but made effective as of May 5, 1993 ("Effective Date"), by
and between Jenner  Technologies,  a California  corporation (the "Company") and
Anthony E. Maida III (the "Executive").

         1. Position and Duties.  The Company hereby hires the Executive and the
Executive hereby accepts  employment as Chief Executive  Officer of the Company.
The Executive will, to the best of his ability during his employment, devote his
full time and best efforts to the performance of the duties and functions of the
position of Chief  Executive  Officer of the Company,  and in the performance of
those duties,  will comply with the policies of the Company and the direction of
the  board of  directors.  If  requested,  the  Executive  agrees  to serve as a
director of the Company without any additional compensation.

         2. Compensation.

                  (a) Salary.  The Company  agrees to pay the  Executive and the
Executive  agrees to accept as  compensation  for his  services,  a monthly base
salary of $8,333.33  payable in accordance with the Company's  standard  payroll
policy.  The first and last  payment by the  Company to the  Executive  shall be
prorated, if necessary, to reflect a commencement or termination date other than
the first or last working day of a pay period.  From time to time,  the board of
directors will consider  increases in Executive's annual rate of salary in light
of the Executive's individual performance and other relevant factors.

                  (b)  Benefits.  The  Executive  will be  entitled  to standard
vacation,   fringe  benefits  and  reimbursement  for  reasonable  out-of-pocket
expenses  in  accordance  with  the  Company's   practices   covering  executive
personnel, as such may be in effect from time to time.

         3. Proprietary  Information Agreement. In connection with the execution
of this Agreement,  the Executive  reaffirms and agrees to abide by the terms of
his Employee Proprietary  Information  Agreement with the Company (except to the
extent that such agreement references at- will employment).

         4. Terms and Termination.

                  (a) Term. Except as otherwise set forth herein, this Agreement
will terminate on November 20, 1997;  provided however that, on each anniversary
of the Execution  Date, the term of this  Agreement  shall be extended to a date
three (3) years from the date of the  respective  anniversary  date,  unless the
Company  shall  have  given  Executive  sixty  (60)  days  notice  prior to such
anniversary  date of its  intent not to renew the  Agreement.  The final date of
termination of this Agreement is referred to herein as the "Termination Date."

                  (b) Termination For Cause. This Agreement may be terminated by
the  Company at any time for cause (as  defined  below)  without  any  severance
obligation  on the part of the  Company.  For purposes of this  Agreement,  "for
cause" shall include (i) acts of moral turpitude by the


                                       -1-





Executive,  (ii) willful or habitual  neglect of Executive's  obligations  under
this Agreement,  (iii) an act of theft or dishonesty involving the Company, (iv)
the wrongful  disclosure of trade secrets,  (v) any other intentional  action by
Executive  that  causes  material  damage to the Company or its  relations  with
customers,  suppliers,  employees  or  consultants,  or (vi)  conviction  of the
Executive of a felony.

                  (c)   Termination   Without  Cause.   This  Agreement  may  be
terminated by the Company at any time without  cause;  provided that the Company
shall pay to Executive as a severance payment (i) an amount equal to Executive's
remaining  salary  payable  under  this  Agreement  through  and  including  the
Termination  Date computed at Executive's  then applicable  monthly base salary,
(ii) any bonus which has not been paid at the time of termination, and (iii) any
vacation,  sick leave or other accrued  benefits  payable in accordance with the
Company's policies then in effect. The payment to the Executive of the severance
payment  described in this  Section  4(c) and the vesting of stock  described in
Section  4(e) below  will  discharge  all of the  Company's  obligations  to the
Executive.

                  (d) Termination in the Event of Bankruptcy.  In the event that
the Company is the subject of, (i) any bankruptcy  proceeding,  (ii)  assignment
for the benefit of creditors,  (iii) a general cessation of operations,  or (iv)
any other determination that the Company is insolvent and unable to continue its
normal  business  functions and  activities  (individually  and/or  collectively
"Bankruptcy");  and  such  Bankruptcy  is the  cause  for  termination  of  this
Agreement,  then the  Company  shall pay to  Executive  $50,000  as a  severance
payment, to the greatest extent such payment is allowed by applicable law and/or
any court of competent jurisdiction.

                  (e)  Termination  by Executive;  Death.  This Agreement may be
terminated  by the Executive at any time upon 30 days written  notice,  in which
case the  Company  shall  have no  severance  obligation  to the  Executive.  If
Executive dies before the end of the term of this Agreement,  Executive's estate
shall be entitled to receive (i) an amount equal to Executive's remaining salary
payable under this Agreement through and including the Termination Date computed
at Executive's then applicable monthly base salary, (ii) any bonus which has not
been paid at the time of death,  and (iii) any  vacation,  sick  leave and other
accrued  benefits  payable in  accordance  with the  Company's  policies then in
effect.

                  (f)  Status as an  Employee;  Vesting  of  Stock.  Executive's
status as an employee of the Company  will be deemed to cease on the date of any
termination of employment as provided above. In the event that this Agreement is
terminated by the Company without cause (as provided in Section 4(c) above),  or
the  Executive  dies or  becomes  disabled  (as such terms is defined in Section
22(e)(3) of the Internal Revenue Code of 1986, as amended) before the end of the
term of this  Agreement  (as  provided in the second  sentence  of Section  4(e)
above), then 100% of the shares subject to the Stock Purchase Agreement dated as
of December 10, 1992 between the Company and the Executive (the "Stock  Purchase
Agreement")  shall be released from the Repurchase Option set forth in Section 4
of such Stock Purchase Agreement.



                                       -2-






         5. Conflicting  Agreements.  The Executive represents and warrants that
he is free to enter  into  this  Agreement  and  that  there  are no  employment
contracts or restrictive  covenants  preventing  full  performance of his duties
hereunder.

         6.  Withholding.  All amounts payable to Executive under this Agreement
shall be subject to applicable  withholding  by the Company for taxes payable by
the Executive.

         7. Miscellaneous.

                  (a)  Assignment.  This Agreement is predicated upon the unique
abilities and personal  relationship of Executive and the Company.  Accordingly,
Executive may not assign this Agreement or any of his rights  hereunder  without
the express  written  consent of the Company.  This  Agreement will inure to the
benefit of and will be binding upon the successors and assigns of the Company.

                  (b) Entire Agreement;  Amendment.  This Agreement contains the
entire  agreement of the parties,  and may not be changed orally,  but only by a
subsequent  writing signed by the party against whom  enforcement of such change
is sought.

                  (c) Prior Agreements;  Waiver.  This Agreement  supersedes any
prior agreement  between the parties related to the subject matter hereof. It is
agreed  that a waiver  by  either  party of a breach  of any  provision  of this
Agreement shall not operate or be construed as a waiver of any subsequent breach
by the same party.

                  (d)  Severability.  In  case  one or  more  of the  provisions
contained in this Agreement shall for any reason be held to be invalid,  illegal
or unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other  provisions  of this  Agreement  but such  provisions
shall be deemed  deleted and such deletion  shall not affect the validity of any
other provision of this Agreement.

                  (e)  Governing  Law. This  Agreement  shall be governed by and
construed according to the internal laws of the State of California. The federal
and state courts of the state of California shall have exclusive jurisdiction to
adjudicate any dispute rising out of this Agreement.

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the day and year first above written.

JENNER TECHNOLOGIES                           ANTHONY E. MAIDA III


By:/s/ LYNN SPITLER                           /s/ ANTHONY E. MAIDA
   --------------------------                 --------------------------
Title:Chairman
      -----------------------




                                       -3-



             
                                                                   EXHIBIT 10.11



                         EXECUTIVE EMPLOYMENT AGREEMENT


         This Executive  Employment  Agreement is signed as of November 20, 1994
("Execution  Date"), but made effective as of May 5, 1993 ("Effective Date"), by
and between Jenner  Technologies,  a California  corporation (the "Company") and
Lynn E. Spitler, M.D. (the "Executive").

         1. Position and Duties.  The Company hereby hires the Executive and the
Executive hereby accepts  employment as President of the Company.  The Executive
will, to the best of her ability during her employment, devote her full time and
best efforts to the  performance  of the duties and functions of the position of
President of the Company,  and in the  performance of those duties,  will comply
with the policies of the Company and the direction of the board of directors. If
requested,  the Executive  agrees to serve as a director of the Company  without
any additional compensation.

         2. Compensation.

                  (a) Salary.  The Company  agrees to pay the  Executive and the
Executive  agrees to accept as  compensation  for her  services,  a monthly base
salary of $8,333.33  payable in accordance with the Company's  standard  payroll
policy.  The first and last  payment by the  Company to the  Executive  shall be
prorated, if necessary, to reflect a commencement or termination date other than
the first or last working day of a pay period.  From time to time,  the board of
directors will consider  increases in Executive's annual rate of salary in light
of the Executive's individual performance and other relevant factors.

                  (b)  Benefits.  The  Executive  will be  entitled  to standard
vacation,   fringe  benefits  and  reimbursement  for  reasonable  out-of-pocket
expenses  in  accordance  with  the  Company's   practices   covering  executive
personnel, as such may be in effect from time to time.

         3. Proprietary  Information Agreement. In connection with the execution
of this Agreement,  the Executive  reaffirms and agrees to abide by the terms of
her Employee Proprietary  Information  Agreement with the Company (except to the
extent that such agreement references at- will employment).

         4. Terms and Termination.

                  (a) Term. Except as otherwise set forth herein, this Agreement
will terminate on November 20, 1997;  provided however that, on each anniversary
of the Execution  Date, the term of this  Agreement  shall be extended to a date
three (3) years from the date of the  respective  anniversary  date,  unless the
Company  shall  have  given  Executive  sixty  (60)  days  notice  prior to such
anniversary  date of its  intent not to renew the  Agreement.  The final date of
termination of this Agreement is referred to herein as the "Termination Date."

                  (b) Termination For Cause. This Agreement may be terminated by
the  Company at any time for cause (as  defined  below)  without  any  severance
obligation  on the part of the  Company.  For purposes of this  Agreement,  "for
cause" shall include (i) acts of moral turpitude by the



                                       -1-






Executive,  (ii) willful or habitual  neglect of Executive's  obligations  under
this Agreement,  (iii) an act of theft or dishonesty involving the Company, (iv)
the wrongful  disclosure of trade secrets,  (v) any other intentional  action by
Executive  that  causes  material  damage to the Company or its  relations  with
customers,  suppliers,  employees  or  consultants,  or (vi)  conviction  of the
Executive of a felony.

                  (c)   Termination   Without  Cause.   This  Agreement  may  be
terminated by the Company at any time without  cause;  provided that the Company
shall pay to Executive as a severance payment (i) an amount equal to Executive's
remaining  salary  payable  under  this  Agreement  through  and  including  the
Termination  Date computed at Executive's  then applicable  monthly base salary,
(ii) any bonus which has not been paid at the time of termination, and (iii) any
vacation,  sick leave or other accrued  benefits  payable in accordance with the
Company's policies then in effect. The payment to the Executive of the severance
payment  described in this  Section  4(c) and the vesting of stock  described in
Section  4(e) below  will  discharge  all of the  Company's  obligations  to the
Executive.

                  (d) Termination in the Event of Bankruptcy.  In the event that
the Company is the subject of, (i) any bankruptcy  proceeding,  (ii)  assignment
for the benefit of creditors,  (iii) a general cessation of operations,  or (iv)
any other determination that the Company is insolvent and unable to continue its
normal  business  functions and  activities  (individually  and/or  collectively
"Bankruptcy");  and  such  Bankruptcy  is the  cause  for  termination  of  this
Agreement,  then the  Company  shall pay to  Executive  $50,000  as a  severance
payment, to the greatest extent such payment is allowed by applicable law and/or
any court of competent jurisdiction.

                  (e)  Termination  by Executive;  Death.  This Agreement may be
terminated  by the Executive at any time upon 30 days written  notice,  in which
case the  Company  shall  have no  severance  obligation  to the  Executive.  If
Executive dies before the end of the term of this Agreement,  Executive's estate
shall be entitled to receive (i) an amount equal to Executive's remaining salary
payable under this Agreement through and including the Termination Date computed
at Executive's then applicable monthly base salary, (ii) any bonus which has not
been paid at the time of death,  and (iii) any  vacation,  sick  leave and other
accrued  benefits  payable in  accordance  with the  Company's  policies then in
effect.

                  (f)  Status as an  Employee;  Vesting  of  Stock.  Executive's
status as an employee of the Company  will be deemed to cease on the date of any
termination of employment as provided above. In the event that this Agreement is
terminated by the Company without cause (as provided in Section 4(c) above),  or
the  Executive  dies or  becomes  disabled  (as such term is  defined in Section
22(e)(3) of the Internal Revenue Code of 1986, as amended) before the end of the
term of this  Agreement  (as  provided in the second  sentence  of Section  4(e)
above), then 100% of the shares subject to the Stock Purchase Agreement dated as
of December 10, 1992 between the Company and the Executive (the "Stock  Purchase
Agreement")  shall be released from the Repurchase Option set forth in Section 4
of such Stock Purchase Agreement.



                                       -2-






         5. Conflicting  Agreements.  The Executive represents and warrants that
she is free to enter  into  this  Agreement  and that  there  are no  employment
contracts or restrictive  covenants  preventing  full  performance of her duties
hereunder.

         6.  Withholding.  All amounts payable to Executive under this Agreement
shall be subject to applicable  withholding  by the Company for taxes payable by
the Executive.

         7. Miscellaneous.

                  (a)  Assignment.  This Agreement is predicated upon the unique
abilities and personal  relationship of Executive and the Company.  Accordingly,
Executive may not assign this Agreement or any of her rights  hereunder  without
the express  written  consent of the Company.  This  Agreement will inure to the
benefit of and will be binding upon the successors and assigns of the Company.

                  (b) Entire Agreement;  Amendment.  This Agreement contains the
entire  agreement of the parties,  and may not be changed orally,  but only by a
subsequent  writing signed by the party against whom  enforcement of such change
is sought.

                  (c) Prior Agreements;  Waiver.  This Agreement  supersedes any
prior agreement  between the parties related to the subject matter hereof. It is
agreed  that a waiver  by  either  party of a breach  of any  provision  of this
Agreement shall not operate or be construed as a waiver of any subsequent breach
by the same party.

                  (d)  Severability.  In  case  one or  more  of the  provisions
contained in this Agreement shall for any reason be held to be invalid,  illegal
or unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other  provisions  of this  Agreement  but such  provisions
shall be deemed  deleted and such deletion  shall not affect the validity of any
other provision of this Agreement.

                  (e)  Governing  Law. This  Agreement  shall be governed by and
construed according to the internal laws of the State of California. The federal
and state courts of the state of California shall have exclusive jurisdiction to
adjudicate any dispute rising out of this Agreement.

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the day and year first above written.

JENNER TECHNOLOGIES                             LYNN E. SPITLER, M.D.


By:/s/ ANTHONY E. MAIDA                         /s/ LYNN SPITLER
   --------------------------                   -------------------------
Title: CEO


                                       -3-







                                                                   EXHIBIT 10.12



                                       December 26, 1996



Thomas P.H. Twaddell, M.D., F.A.C.G.
600 Duncan Street
San Francisco, CA  94131

Dear Dr. Twaddell:

         On behalf of Jenner  Technologies  (the  "Company"),  I am  pleased  to
invite you to join the Company as its Vice  President  of Clinical  Research and
Product Development.  In this position, you will be expected to devote your fill
business time, attention and energies to the performance of your duties with the
Company.  The effective date of your employment will be on or before January 15,
1997.

         The terms of this offer of employment are as follows:

         1.       Compensation.  The Company  will pay you a salary of $7,083.33
                  twice  a month  in  accordance  with  the  Company's  standard
                  payroll policies ($170,000 annual).  Your salary will begin as
                  of the  effective  date of  employment.  The  first  and  last
                  payment by the Company to you will be adjusted,  if necessary,
                  to reflect a commencement  or termination  date other than the
                  first or last working day of a pay period.

         2.       Benefits.  You  will  be  entitled  during  the  term  of your
                  employment  to the  Company's  standard  vacation and benefits
                  covering  employees,  as such may be in  effect  from  time to
                  time,  in  addition,  when you  travel  for  Company  business
                  matters, the Company will reimburse you for all business class
                  flights, first class if business class not available.

         3.       Stock  Option.  Subject  to action by the  Company's  Board of
                  Directors and  compliance  with  applicable  state and federal
                  securities  laws,  the Company  will grant to you an option to
                  purchase 150,000 shares of the Company's Common Stock pursuant
                  to the Company's  1993 Employee  Stock Plan, or other Employee
                  Stock Plan adopted by the Company (the  "Plan").  The exercise
                  price of the option  will be $1.73 per share.  The option will
                  vest over four  years  with 1/4 of the  shares  subject to the
                  option  vesting  one  year  from  the  effective  date of your
                  employment  and 1/48 of the shares  vesting at the end of each
                  full month thereafter until all







                  shares are vested,  subject to all  provisions of the Plan and
                  your continued employment with the Company.

         4.       At-Will Employment. Your employment with the Company is for no
                  specified period and constitutes  "at-will"  employment.  As a
                  result, you are free to terminate your employment at any time,
                  for any reason or for no  reason.  Similarly,  the  Company is
                  free to terminate your  employment at any time, for any reason
                  or  for no  reason.  In  the  event  of  termination  of  your
                  employment,   you  will  not  be  entitled  to  any  payments,
                  benefits,  damages,  awards or compensation  other than as set
                  forth herein and as may  otherwise be available in  accordance
                  with the Company's  established employee plans and policies at
                  the time of termination.

         5.       Severance.  In the event your  employment  with the Company is
                  terminated without Cause by the Company,  you will be entitled
                  to  continuation  of your base  salary for a period of six (6)
                  months.  For  purposes of this  severance  provision,  "Cause"
                  means gross negligence, gross misconduct,  habitual neglect of
                  duties,  dishonesty,  criminal acts, violation of any state or
                  federal   securities  laws,  and  disobeyment  of  the  lawful
                  policies or instruction of the Board of Directors.

         6.       Proprietary Information Agreement. As a condition of accepting
                  this offer of  employment,  you will be required to  complete,
                  sign  and  return   the   Employee   Proprietary   Information
                  Agreement,  attached  hereto,  along with a copy of this offer
                  letter.

         7.       Immigration  Laws. For purposes of federal  immigration  laws,
                  you will be  required  to provide to the  Company  documentary
                  evidence of your identity and  eligibility  for  employment in
                  the United States.  Such documentation must be provided within
                  3 business days of the effective date of your  employment,  or
                  your   employment   relationship   with  the  Company  may  be
                  terminated.

         8.       General.   This  offer   letter,   the  Employee   Proprietary
                  Information Agreement and the agreement(s)  representing stock
                  options granted to you under the Plan, when signed by you, set
                  forth in the terms of your  employment  with the  Company  and
                  supersede any and all prior  representations  and  agreements,
                  whether written or oral. This agreement can only be amended in
                  a writing  signed by you and an  officer of the  Company.  Any
                  waiver of a right  under this  agreement  must be in  writing.
                  This agreement will be governed by California law.







         We look forward to you joining the Company.  If the foregoing terms are
agreeable,  please indicate your acceptance by signing the enclosed copy of this
letter in the space  provided  below and  returning  it to me,  along  with your
completed and signed Employee Proprietary Information Agreement. This offer will
terminate if not accepted on or before January 15, 1997.

                                                Sincerely,

                                                JENNER TECHNOLOGIES


                                                /s/ ANTHONY E. MAIDA
                                                ------------------------------
                                                Anthony E. Maida, III, MA, MBA
                                                Chief Executive Officer


ACCEPTED:


/s/ Thomas Twaddell
- --------------------------------------
Thomas P.H. Twaddell, M.D., F.A.C.G.








                                                                   EXHIBIT 10.13



              FIRST AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT
              ----------------------------------------------------


         THIS FIRST AMENDED AND RESTATED  INVESTOR  RIGHTS  AGREEMENT is entered
into as of the date  provided  below among  Jenner  Technologies,  a  California
corporation (the "Company"),  the purchasers of the Company's Series A Preferred
Stock  under  that  certain  Series A  Preferred  Stock  Subscription  Agreement
confirmed and accepted as of May 28, 1993 (the "Series A Investors")  and Hayden
Leason (the "Series B  Investor").  Both the Series A Investors and the Series B
Investor are  collectively  referred to herein as the "Investors" and are listed
on the Schedule of Investors attached to this Agreement as Exhibit A.

                                    RECITALS

         WHEREAS,  the Company  and the Series A  Investors  are parties to that
certain Investor Rights Agreement dated May 7, 1993 (the "Prior Agreement"); and

         WHEREAS,  the Series A Investors have certain  registration rights upon
conversion of their Series A Preferred Stock under the Prior Agreement; and

         WHEREAS, the Company and Series A Investors wish to induce the Series B
Investor to purchase Series B Preferred Stock pursuant to the Series B Preferred
Stock and Warrant Purchase Agreement dated as of July 25, 1995; and

         WHEREAS,  the sale of the  Series  B  Preferred  Stock to the  Series B
Investor is  conditioned  upon the  registration  rights  being  extended to the
Series B Investor; and

         WHEREAS,  the Prior  Agreement  may be amended as set forth in Sections
1.15 and 3.6 thereof; and

         WHEREAS,  the Series A  Investors  wish to amend and  restate the Prior
Agreement to include the Series B Investor;

         NOW THEREFORE, in consideration of the foregoing,  the parties agree as
follows:


         NOW THEREFORE, the parties hereby agree as follows:

         1. Registration Rights. The Company covenants and agrees as follows:

                  1.1  Certain  Definitions.  As  used in  this  Agreement,  the
following terms shall have the following respective meanings:

                       "Commission"  shall  mean  the  Securities  and  Exchange
Commission or any other federal agency at the time administering the Act.

                       "Company"  shall mean Jenner  Technologies,  a California
corporation.









                       "Holder"  shall  mean  any  person  holding   Registrable
Securities (or  securities  convertible  into or  exchangeable  for  Registrable
Securities)  to whom the rights under this Section 1 were granted  directly from
the  Company  and any  person  holding  Registrable  Securities  (or  securities
convertible into or exchangeable for Registrable  Securities) to whom the rights
under this  Section 1 have been  transferred  in  accordance  with  Section 1.13
hereof.

                       "Initiating  Holders"  shall mean any  Holders who in the
aggregate  possess at least 80% of the  Registrable  Securities  (or  securities
convertible or exchangeable for Registrable Securities).

                       "Registerable  Securities"  means  (i) the  Common  Stock
issued or  issuable  upon  conversion  of the Series A  Preferred  Stock  issued
pursuant to the Series A Preferred  Stock  Subscription  Agreements  between the
Company and  certain  Series A Investors  confirmed  and  accepted as of May 28,
1993,  (ii) the Common Stock issued or issuable upon  conversion of the Series B
Preferred  Stock  issued  pursuant to the Series B  Preferred  Stock and Warrant
Purchase  Agreement  dated July 25,  1995  between  the Company and the Series B
Investor, (iii) the Common Stock issued or issuable upon exercise of the Warrant
dated July 25, 1995 issued by the Company to the Series B Investor, and (iv) any
Common Stock of the Company issued or issuable in respect of the above described
securities upon any stock split,  stock dividend,  recapitalization,  or similar
event,  or any Common  Stock  otherwise  issued or issuable  with respect to the
above described  securities,  provided,  however, that shares of Common Stock or
other securities shall only be treated as Registrable  Securities if and so long
as they have not been (A) sold to or  through a broker or dealer or  underwriter
in a public distribution or a public securities transaction,  or (B) sold or are
available  for  immediate  sale in the  opinion of  counsel to the  Company in a
transaction exempt from the registration and prospectus delivery requirements of
the Act so that all transfer restric tions and restrictive  legends with respect
thereto are removed upon the consummation of such sale.

                       The terms  "register,"  "registered"  and  "registration"
refer  to a  registration  effected  by  preparing  and  filing  a  registration
statement in  compliance  with the Act, and the  declaration  or ordering of the
effectiveness of such registration statement.

                       "Registration  Expenses" shall mean all expenses,  except
as otherwise  stated below,  incurred by the Company in complying  with Sections
1.5,  1.6 and 1.7  hereof,  including,  without  limitation,  all  registration,
qualification  and  filing  fees,  printing  expenses,  escrow  fees,  fees  and
disbursements  of  counsel  for the  Company,  blue sky fees and  expenses,  the
expense of any special audits  incident to or required by any such  registration
(but excluding the compensation of regular  employees of the Company which shall
be paid in any event by the Company).

                       "Restricted  Securities" shall mean the securities of the
Company required to bear the legend set forth in Section 1.3 hereof.

                       "Act" means the Securities Act of 1933, as amended.

                       "Selling Expenses" shall mean all underwriting discounts,
selling  commissions  and stock  transfer  taxes  applicable  to the  securities
registered by the Holders.


                                       -2-








                  1.2 Restrictions on Transferability. The Restricted Securities
shall not be sold,  assigned,  transferred or pledged except upon the conditions
specified in this Section 1, which conditions are intended to ensure  compliance
with the provisions of the Act. Each Investor will cause any proposed purchaser,
assignee,  transferee, or pledgee of the Securities held by an Investor to agree
to take  and  hold  such  securities  subject  to the  provisions  and  upon the
conditions specified in this Section 1.

                  1.3  Restrictive   Legend.   Each  certificate  or  instrument
representing   Registrable   Securities,   or   securities   convertible   into,
exchangeable  for  or  exercisable  for  Registrable  Securities  shall  (unless
otherwise  permitted  by the  provisions  of  Section  1.4  below) be stamped or
otherwise  imprinted  with a legend in the  following  form (in  addition to any
legend required under applicable state securities laws):

                  THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE
                  BEEN  ACQUIRED  FOR  INVESTMENT  AND  HAVE NOT BEEN
                  REGISTERED  UNDER THE SECURITIES ACT OF 1933.  SUCH
                  SECURITIES  MAY NOT BE SOLD OR  TRANSFERRED  IN THE
                  ABSENCE OF SUCH  REGISTRATION OR UNLESS THE COMPANY
                  RECEIVES   AN   OPINION   OF   COUNSEL   REASONABLY
                  ACCEPTABLE TO IT STATING THAT SUCH SALE OR TRANSFER
                  IS  EXEMPT  FROM THE  REGISTRATION  AND  PROSPECTUS
                  DELIVERY REQUIREMENTS OF SAID ACT.

         Each Investor and Holder  consents to the Company  making a notation on
its records and giving  instructions  to any transfer agent of the securities in
order to implement the restrictions on transfer established in this Section 1.

                  1.4  Notice  of  Proposed   Transfers.   The  holder  of  each
certificate  representing  Restricted Securities by acceptance thereof agrees to
comply in all respects  with the  provisions  of this Section 1.4.  Prior to any
proposed  sale,  assignment,  transfer  or pledge of any  Restricted  Securities
(other than (i) a transfer not involving a change in beneficial  ownership  (ii)
in transactions  involving the distribution without  consideration of Restricted
Securities by any of the Investors to any of its partners,  or retired partners,
or to the estate of any of its partners or retired partners in a transaction not
involving a change in beneficial ownership,  (iii) a transfer in compliance with
Rule 144,  so long as the Company is  furnished  with  satisfactory  evidence of
compliance  with such Rule, (iv) transfers by any holder who is an individual to
a trust for the benefit of such holder or his family, and (v) transfers by gift,
will or intestate  succession to the spouse,  lineal descendants or ancestors of
any  holder or spouse of a  holder),  unless  there is in effect a  registration
statement under the Act covering the proposed transfer, the holder thereof shall
give  written  notice to the Company of such  holder's  intention to effect such
transfer, sale, assignment or pledge. Each such notice shall describe the manner
and  circumstances  of the  proposed  transfer,  sale,  assignment  or pledge in
sufficient detail, and shall be accompanied,  at such holder's expense by either
(i) an unqualified  written opinion of legal counsel who shall,  and whose legal
opinion  shall be,  reasonably  satisfactory  to the  Company  addressed  to the
Company,  to the effect that the proposed transfer of the Restricted  Securities
may be effected without registration under the Act, or (ii) a "no


                                       -3-








action"  letter  from the  Commission  to the effect  that the  transfer of such
securities without registration will not result in a recommendation by the staff
of the  Commission  that action be taken with  respect  thereto,  whereupon  the
holder  of such  Restricted  Securities  shall  be  entitled  to  transfer  such
Restricted  Securities in accordance  with the terms of the notice  delivered by
the holder to the Company. Each certificate evidencing the Restricted Securities
transferred  as above  provided  shall  bear,  except if such  transfer  is made
pursuant to Rule 144, the  appropriate  restrictive  legend set forth in Section
1.3 above,  except that such certificate shall not bear such restrictive  legend
if in the opinion of counsel for such holder and the Company  such legend is not
required in order to establish compliance with any provision of the Act.

                  1.5      Requested Registration.

                           (a) In case the Company shall receive from Initiating
Holders  a  written   request   that  the  Company   effect  any   registration,
qualification  or  compliance  with  respect  to at least 80% of such  shares of
Registrable Securities the Company will:

                               (i) promptly give written  notice of the proposed
registration, qualification or compliance to all other Holders; and

                               (ii) as soon as practicable, use its best efforts
to effect such  registration,  qualification or compliance  (including,  without
limitation,  appropriate  qualification under applicable blue sky or other state
securities laws and appropriate  compliance with applicable  regulations  issued
under the Act and any other governmental  requirements or regulations) as may be
so requested and as would permit or facilitate the sale and  distribution of all
or such portion of such Registrable Securities as are specified in such request,
together with all or such portion of the Registrable Securities of any Holder or
Holders joining in such request as are specified in a written  request  received
by the  Company  within 20 days after  receipt of such  written  notice from the
Company;

                  Provided,  however, that the Company shall not be obligated to
take any action to effect any such  registration,  qualification  or  compliance
pursuant to this Section 1.5:

                                       (A) In  any  particular  jurisdiction  in
which the Company  would be required to execute a general  consent to service of
process in effecting such  registration,  qualification or compliance unless the
Company is already subject to service in such  jurisdiction and except as may be
required by the Act;

                                       (B) Prior to the earlier of (i)  February
15,  1999 or (ii)  within six  months of the  effective  date of any  registered
public offering of the Company's stock;

                                       (C) During the period  starting  with the
date  sixty (60) days prior to the  Company's  estimated  date of filing of, and
ending on the date six (6) months  immediately  following the effective date of,
any registration statement pertaining to securities of the Company (other than a
registration  of  securities  in a Rule 145  transaction  or with  respect to an
employee benefit plan), provided


                                       -4-







that the Company is actively  employing in good faith all reasonable  efforts to
cause such registration statement to become effective;

                                       (D) If the  aggregate  offering  price to
the public from the proposed sale of such  Registrable  Securities would be less
than $7,500,000;

                                       (E) After the  Company has  effected  one
such  registrations  pursuant to this Section 1.5(a),  and such registration has
been declared or ordered effective;

                                       (F) If the Company  shall furnish to such
Holders a certificate signed by the President of the Company stating that in the
good faith judgment of the Board of Directors it would be seriously  detrimental
to the Company or its shareholders  for a registration  statement to be filed at
such time,  then the  Company's  obligation to use its best efforts to register,
qualify or comply  under this  Section 1.5 shall be deferred for a period not to
exceed 180 days from the date of receipt of written  request from the Initiating
Holders.

                  Subject to the foregoing  clauses (A) through (F), the Company
shall file a  registration  statement  covering the  Registrable  Securities  so
requested to be registered as soon as practicable,  after receipt of the request
or requests of the Initiating Holders.

                           (b) In the  event  that a  registration  pursuant  to
Section 1.5 is for a registered public offering  involving an underwriting,  the
Company  shall so advise the  Holders as part of the notice  given  pursuant  to
Section  1.5(a)(i).  In such  event,  the right of any  Holder  to  registration
pursuant to Section 1.5 shall be conditioned upon such Holder's participation in
the underwriting arrangements required by this Section 1.5, and the inclusion of
such Holder's Registrable Securities in the underwriting to the extent requested
shall be limited to the extent provided herein.

                  The Company  shall  (together  with all Holders  proposing  to
distribute  their   securities   through  such   underwriting)   enter  into  an
underwriting  agreement in customary form with the managing underwriter selected
for such underwriting by a majority in interest of the Initiating  Holders,  but
subject  to  the  Company's  reasonable  approval.   Notwithstanding  any  other
provision  of  this  Section  1.5,  if  the  managing  underwriter  advises  the
Initiating Holders in writing that marketing factors require a limitation of the
number  of shares  to be  underwritten,  then the  Company  shall so advise  all
holders  of  Registrable  Securities  and the  number of  shares of  Registrable
Securities that may be included in the registration  and  underwriting  shall be
allocated  among all Holders thereof (except those Holders who have indicated to
the Company their decision not to distribute any of their Registrable Securities
through such  underwriting)  in  proportion,  as nearly as  practicable,  to the
respective amounts of Registrable Securities held by such Holders at the time of
filing the registration  statement.  No Registrable Securities excluded from the
underwriting  by  reason  of the  underwriter's  marketing  limitation  shall be
included  in such  registration.  To  facilitate  the  allocation  of  shares in
accordance with the above provisions,  the Company or the underwriters may round
the number of shares allocated to any Holder to the nearest 100 shares.



                                       -5-







                  If any Holder of  Registrable  Securities  disapproves  of the
terms of the  underwriting,  such  person  may elect to  withdraw  therefrom  by
written  notice to the Company,  the  managing  underwriter  and the  Initiating
Holders.  The Registrable  Securities and/or other securities so withdrawn shall
also be withdrawn from registration,  and such Registrable  Securities shall not
be  transferred  in a public  distribution  prior to 90 days after the effective
date  of  such  registration,  or  such  other  shorter  period  of  time as the
underwriters may require.

                  1.6      Company Registration.

                           (a) If at any time or from  time to time the  Company
shall determine to register any of its securities, either for its own account or
the  account  of a security  holder or  holders,  other than (i) a  registration
relating  solely to employee  benefit  plans,  or (ii) a  registration  relating
solely to a Commission Rule 145 transaction, the Company will:

                                    (i)  promptly  give to each  Holder  written
notice thereof; and

                                    (ii) include in such  registration  (and any
related  qualification  under  blue sky laws or  other  compliance),  and in any
underwriting  involved therein,  all the Registrable  Securities  specified in a
written  request or requests,  made within 20 days after receipt of such written
notice from the Company, by any Holder.

                           (b) If the  registration  of which the Company  gives
notice is for a  registered  public  offering  involving  an  underwriting,  the
Company  shall so advise  the  Holders  as a part of the  written  notice  given
pursuant  to  Section  1.6(a)(i).  In such  event  the  right of any  Holder  to
registration  pursuant to Section 1.6 shall be  conditioned  upon such  Holder's
participation in such  underwriting and the inclusion of Registrable  Securities
in the  underwriting to the extent  provided  herein.  All Holders  proposing to
distribute their securities  through such underwriting  shall (together with the
Company  and the  other  holders  distributing  their  securities  through  such
underwriting)  enter into an  underwriting  agreement in customary form with the
managing   underwriter   selected   for  such   underwriting   by  the  Company.
Notwithstanding  any  other  provision  of this  Section  1.6,  if the  managing
underwriter determines that marketing factors require a limitation of the number
of shares to be underwritten, the managing underwriter may limit the Registrable
Securities or other  securities to be included in such  registration,  provided,
however,  that after the Company's initial firm commitment  underwritten  public
offering no such  limitation  shall reduce the  percentage of such  registration
consisting of Registrable  Securities below 15%. The Company shall so advise all
Holders  and  other  holders   distributing   their  secu  rities  through  such
underwriting  and the  number  of  shares of  Registrable  Securities  and other
securities that may be included in the registration  and  underwriting  shall be
allocated  among all Holders and such other holders in proportion,  as nearly as
practicable,  to the  respective  amounts of  Registrable  Securities  and other
securities  contractually  entitled to registration in the offering held by such
Holders and such other holders at the time of filing the registration statement.
To facilitate the allocation of shares in accordance with the above  provisions,
the Company may round the number of shares  allocated to any Holder or holder to
the nearest 100 shares. If any Holder or holder  disapproves of the terms of any
such  underwriting,  he may elect to withdraw therefrom by written notice to the
Company and the managing


                                       -6-







underwriter.  Any securities  excluded or withdrawn from such underwriting shall
be withdrawn  from such  registration,  and shall not be transferred in a public
distribution  prior to 90 days  after  the  effective  date of the  registration
statement  relating  thereto,  or  such  other  shorter  period  of  time as the
underwriters may require.

                           (c) The Company  shall have the right to terminate or
withdraw  any  registration  initiated by it under this Section 1.6 prior to the
effectiveness  of such  registration  whether or not any  Holder has  elected to
include securities in such registration.

                  1.7      Registration on Form S-3.

                           (a) If any Holder or Holders request that the Company
file a  registration  statement on Form S-3 (or any successor  form to Form S-3)
for a public  offering of shares of the Regis trable  Securities  the reasonably
anticipated  aggregate  price  to the  public  of  which,  net  of  underwriting
discounts  and  commissions,  would  exceed  $1,000,000,  and the  Company  is a
registrant  entitled to use Form S-3 to register the Registrable  Securities for
such an  offering,  the  Company  shall  use its  best  efforts  to  cause  such
Registrable  Securities  to be  registered  for the offering on such form and to
cause such Registrable  Securities to be qualified in such  jurisdictions as the
Holder or Holders may reasonably request;  provided,  however,  that the Company
shall not be  required to effect  more than two  registrations  pursuant to this
Section 1.7. The substantive provisions of Section 1.5(b) shall be applicable to
a registration initiated under this Section 1.7.

                           (b) Notwithstanding the foregoing,  the Company shall
not be  obligated  to take any action  pursuant to this  Section 1.7: (i) in any
particular  jurisdiction  in which the  Company  would be  required to execute a
general   consent  to  service  of  process  in  effecting  such   registration,
qualification or compliance  unless the Company is already subject to service in
such jurisdiction and except as may be required by the Act; (ii) if the Company,
within ten (10) days of the  receipt of the request of the  initiating  Holders,
gives notice of its bona fide  intention to effect the filing of a  registration
statement with the Commission within ninety (90) days of receipt of such request
(other  than with  respect to a  registration  statement  relating to a Rule 145
transaction,  an offering solely to employees or any other registration which is
not appropriate for the  registration of Registrable  Securities)  provided that
the Company is actively  employing in good faith all reasonable efforts to cause
such  registration  statement  to become  effective;  (iii)  during  the  period
starting with the date sixty (60) days prior to the Company's  estimated date of
filing  of, and ending on the date six (6)  months  immediately  following,  the
effective  date of any  registration  statement  pertaining to securities of the
Company  (other than a registration  of securities in a Rule 145  transaction or
with respect to an employee benefit plan), provided that the Company is actively
employing  in good  faith all  reasonable  efforts  to cause  such  registration
statement  to become  effective;  or (iv) if the Company  shall  furnish to such
Holder a certificate  signed by the President of the Company stating that in the
good faith judgment of the Board of Directors it would be seriously  detrimental
to the Company or its shareholders  for  registration  statements to be filed at
such  time,  then the  Company's  obligation  to use its best  efforts to file a
registration statement shall be deferred for a period not to exceed 90 days from
the receipt of the request to file such registration by such Holder.



                                       -7-







                  1.8  Expenses  of  Registration.   All  Registration  Expenses
incurred in connection  with one  registration  pursuant to Section 1.5 shall be
borne by the Company. All Selling Expenses relating to securities  registered on
behalf of the Holders and all other Registration  Expenses shall be borne by the
Holders  of such  securities  pro rata on the  basis of the  number of shares so
registered.

                  1.9 Registration Procedures. In the case of each registration,
qualification or compliance  effected by the Company pursuant to this Section 1,
the Company  will keep each Holder  advised in writing as to the  initiation  of
each  registration,  qualification  and  compliance  and  as to  the  completion
thereof. At its expense the Company will:

                           (a)   Prepare   and  file  with  the   Commission   a
registration  statement with respect to such securities and use its best efforts
to cause such registration statement to become and remain effective for at least
ninety  (90)  days or  until  the  distribution  described  in the  Registration
Statement has been completed;

                           (b) Prepare and file with the SEC such amendments and
supplements to such registration statement and the prospectus used in connection
with  such  registration  statement  as may be  necessary  to  comply  with  the
provisions  of the 1933 Act with respect to the  disposition  of all  securities
covered by such registration statement.

                           (c) Furnish to the Holders  such numbers of copies of
a  prospectus,  including  a  preliminary  prospectus,  in  conformity  with the
requirements of the Act, and such other documents as they may reasonably request
in order to facilitate the disposition of Registrable Securities owned by them.

                           (d) Use its best  efforts to register and qualify the
securities covered by such registration statement under such other securities or
Blue Sky laws of such  jurisdictions  as shall be  reasonably  requested  by the
Holders, provided that the Company shall not be required in connection therewith
or as a condition thereto to qualify to do business or to file a general consent
to service of process in any such states or jurisdictions.

                           (e) In the event of any underwritten public offering,
enter into and perform its obligations under an underwriting agreement, in usual
and customary form, with the managing under writer of such offering. Each Holder
participating  in such  underwriting  shall  also  enter  into and  perform  its
obligations under such an agreement.

                           (f)  Notify  each  Holder of  Registrable  Securities
covered by such  registration  statement at any time when a prospectus  relating
thereto is required to be delivered  under the Act of the happening of any event
as a result of which the prospectus included in such registration  statement, as
then in effect,  includes  an untrue  statement  of a material  fact or omits to
state a material  fact  required to be stated  therein or  necessary to make the
statements  therein  not  misleading  in the  light  of the  circumstances  then
existing.



                                       -8-







                           (g) Furnish,  at the request of any Holder requesting
registration of Registrable  Securities  pursuant to this Section 1, on the date
that such  Registrable  Securities are delivered to the underwriters for sale in
connection with a registration pursuant to this Section 1, (i) an opinion, dated
such date,  of the counsel  representing  the  Company for the  purposes of such
registration,  in form and substance as is customarily  given to underwriters in
an underwritten public offering,  addressed to the underwriters,  if any, and to
the Holders requesting  registration of Registrable Securities and (ii) a letter
dated such date,  from the independent  accountants of the Company,  in form and
substance as is customarily given by independent  accountants to underwriters in
an underwritten public offering,  addressed to the underwriters,  if any, and to
the Holders requesting registration of Registrable Securities.

                  1.10     Indemnification.

                           (a) The Company will indemnify  each Holder,  each of
its officers and directors and partners, and each person controlling such Holder
within the meaning of Section 15 of the Act, with respect to which registration,
qualification  or compliance  has been effected  pursuant to this Section 1, and
each  underwriter,  if any, and each person who controls any underwriter  within
the meaning of Section 15 of the Act,  against  all  expenses,  claims,  losses,
damages or  liabilities  (or actions in respect  thereof),  including any of the
foregoing  incurred in settlement of any  litigation,  commenced or  threatened,
arising out of or based on any untrue statement (or alleged untrue statement) of
a material fact contained in any registration  statement,  prospectus,  offering
circular or other document, or any amendment or supplement thereto,  incident to
any such registration, qualification or compliance, or based on any omission (or
alleged omission) to state therein a material fact required to be stated therein
or necessary to make the statements  therein,  in light of the  circumstances in
which they were made,  not  misleading,  or any  violation by the Company of any
federal,  state or common law rule or  regulation  applicable  to the Company in
connection  with any such  registration,  qualification  or compliance,  and the
Company will reimburse each such Holder, each of its officers and directors, and
each person  controlling such Holder,  each such underwriter and each person who
controls any such underwriter,  for any legal and any other expenses  reasonably
incurred in  connection  with  investigating,  preparing or  defending  any such
claim, loss, damage,  liability or action, provided that the Company will not be
liable  in any  such  case to the  extent  that any such  claim,  loss,  damage,
liability  or  expense  arises  out of or is based on any  untrue  statement  or
omission or alleged untrue  statement or omission,  made in reliance upon and in
conformity  with written  information  furnished to the Company by an instrument
duly executed by such Holder, controlling person or underwriter and stated to be
specifically for use therein.

                           (b) Each Holder will, if Registrable  Securities held
by such Holder are  included in the  securities  as to which such  registration,
qualification  or compliance is being effected,  indemnify the Company,  each of
its  directors  and  officers,  each  underwriter,  if  any,  of  the  Company's
securities  covered by such a registration  statement,  each person who controls
the Company or such underwriter within the meaning of Section 15 of the Act, and
each other such  Holder,  each of its  officers  and  directors  and each person
controlling such Holder within the meaning of Section 15 of the Act, against all
claims,  losses, damages and liabilities (or actions in respect thereof) arising
out of or based on any untrue  statement  (or  alleged  untrue  statement)  of a
material fact contained in any such registration statement, prospectus, offering
circular or other  document,  or any  omission  (or alleged  omission)  to state
therein a material fact


                                       -9-








required to be stated  therein or necessary to make the  statements  therein not
misleading,  and will  reimburse  the Company,  such  Holders,  such  directors,
officers,  persons,  underwriters  or control persons for any legal or any other
expenses  reasonably  incurred in connection with investigating or defending any
such claim, loss,  damage,  liability or action, in each case to the extent, but
only to the extent,  that such untrue statement (or alleged untrue statement) or
omission  (or  alleged  omission)  is  made  in  such  registration   statement,
prospectus,  offering  circular  or  other  document  in  reliance  upon  and in
conformity  with written  information  furnished to the Company by an instrument
duly  executed by such  Holder and stated to be  specifically  for use  therein.
Notwithstanding  the  foregoing,   the  liability  of  each  Holder  under  this
subsection (b) shall be limited in an amount equal to the public  offering price
of the shares sold by such  Holder,  unless such  liability  arises out of or is
based on willful conduct by such Holder.  A Holder will not be required to enter
into any agreement or undertaking in connection with any registration under this
Section 6 providing for any  indemnification or contribution on the part of such
Holder greater than the Holder's obligations under this Section 1.10(b).

                           (c) Each party entitled to indemnification under this
Section 1.10 (the  "Indemnified  Party") shall give notice to the party required
to  provide  indemnification  (the  "Indemnifying  Party")  promptly  after such
Indemnified Party has actual knowledge of any claim as to which indemnity may be
sought,  and shall  permit the  Indemnifying  Party to assume the defense of any
such claim or any litigation resulting therefrom,  provided that counsel for the
Indemnifying  Party,  who shall conduct the defense of such claim or litigation,
shall  be  approved  by  the   Indemnified   Party  (whose  approval  shall  not
unreasonably  be withheld),  and the  Indemnified  Party may participate in such
defense at such party's expense, provided,  however, that the Indemnifying Party
shall bear the expense of independent  counsel for the Indemnified  Party if the
Indemnified Party reasonably  determines that  representation of both parties by
the same counsel would be inappropriate due to actual or potential  conflicts of
interest, and provided further that the failure of any Indemnified Party to give
notice as  provided  herein  shall not  relieve  the  Indemnifying  Party of its
obligations  under  this  Section  unless  the  failure  to give such  notice is
materially  prejudicial to an Indemnifying Party's ability to defend such action
and provided further,  that the Indemnifying  Party shall not assume the defense
for  matters  as to which  there is a  conflict  of  interest  or  separate  and
different  defenses.  No Indemnifying Party, in the defense of any such claim or
litigation, shall, except with the consent of each Indemnified Party, consent to
entry of any judgment or enter into any settlement  which does not include as an
unconditional  term  thereof  the giving by the  claimant or  plaintiff  to such
Indemnified  Party of a release  from all  liability in respect to such claim or
litigation.

                  1.11   Information  by  Holder.   The  Holder  or  Holders  of
Registrable Securities included in any registration shall furnish to the Company
such information  regarding such Holder or Holders,  the Registrable  Securities
held by them and the  distribution  proposed  by such  Holder or  Holders as the
Company may request in writing and as shall be required in  connection  with any
registration, qualification or compliance referred to in this Section 1.

                  1.12 Rule 144 Reporting.  With a view to making  available the
benefits of certain rules and  regulations  of the  Commission  which may at any
time  permit  the  sale  of the  Restricted  Securities  to the  public  without
registration,  after such time as a public market exists for the Common Stock of
the Company, the Company agrees to use its best efforts to:


                                      -10-








                           (a) Make and keep public  information  available,  as
those terms are  understood  and defined in Rule 144 under the Act, at all times
after the  effective  date that the  Company  becomes  subject to the  reporting
requirements of the Act or the Securities Exchange Act of 1934, as amended.

                           (b) Use its best efforts to file with the  Commission
in a timely manner all reports and other documents required of the Company under
the Act and the  Securities  Exchange Act of 1934, as amended (at any time after
it has become subject to such reporting requirements);

                           (c)  So  long  as a  Purchaser  owns  any  Restricted
Securities  to  furnish  to the  Purchaser  forthwith  upon  request  a  written
statement by the Company as to its compliance with the reporting requirements of
said Rule 144 (at any time after 90 days after the  effective  date of the first
registration statement filed by the Company for an offering of its securities to
the general public),  and of the Act and the Securities Exchange Act of 1934 (at
any time after it has become subject to such reporting requirements),  a copy of
the most  recent  annual or  quarterly  report of the  Company,  and such  other
reports and documents of the Company and other  information in the possession of
or reasonably obtainable by the Company as a Purchaser may reasonably request in
availing itself of any rule or regulation of the Commission allowing a Purchaser
to sell any such securities without registration.

                  1.13 Transfer of Registration  Rights. The rights to cause the
Company to register  securities granted Investor under Sections 1.5, 1.6 and 1.7
may be assigned to a transferee or assignee in  connection  with any transfer or
assignment of  Registrable  Securities by an Investor  provided  that:  (i) such
transfer may  otherwise be effected in  accordance  with  applicable  securities
laws,  and (ii) such assignee or  transferee  acquires at least 80,000 shares of
Registrable  Securities  or the  securities  into  which  they are  convertible.
Notwithstanding  the  foregoing,  the rights to cause the  Company  to  register
securities may be assigned,  in connection with a distribution by such Investor,
to any  partner,  former  partner,  affiliate  or the estate of any such partner
without  compliance  with item (ii) above,  provided  written  notice thereof is
promptly given to the Company.

                  1.14 Standoff  Agreement.  Each Holder agrees, so long as such
Holder  holds at least one  percent  (1%) of the  Company's  outstanding  voting
equity  securities,  in connection with the Company's initial public offering of
the Company's  securities  that, upon request of the Company or the underwriters
managing any  underwritten  offering of the Company's  securities,  not to sell,
make any short sale of, loan, grant any option for the purchase of, or otherwise
dispose of any Common  Stock of the Company  (other  than those  included in the
registration)  without  the  prior  written  consent  of  the  Company  or  such
underwriters,  as the case may be,  for such  period of time (not to exceed  one
hundred eighty (180) days) from the effective date of such  registration  as may
be requested by the underwriters;  provided,  that all other Holders of at least
one percent (1%) of the Company's  outstanding  voting equity securities and all
of the officers  and  directors of the Company who own stock of the Company also
agree to such restrictions.

                  1.15  Amendment  of  Registration  Rights.  With  the  written
consent  of the  holders  of more than 50% of the then  outstanding  Registrable
Securities (including the securities  convertible into Registrable  Securities),
the Company may amend this Section 1, or enter into any agreement with any


                                      -11-










holder or prospective  holder of any securities of the Company which would allow
such holder or  prospective  holder to include such  securities  as  Registrable
Securities under the provisions hereof.

                  1.16  Termination  of  Registration   Rights.   No  Holder  of
Registrable  Securities shall be entitled to exercise any right provided in this
Section  1 after  five  (5)  years  following  the  consummation  of the sale of
securities  pursuant to a registration  statement filed by the Company under the
Act in connection with the initial firm commitment  underwritten public offering
of its securities to the general public.

         2.       Financial Covenants.

                  2.1  Financial  Statements.   For  so  long  as  the  Investor
(including any affiliated entities of the Investor) owns at least 250,000 shares
of Preferred Stock (or Common Stock issued upon conversion thereof) or until the
closing of a public  offering  pursuant to an effective  registration  statement
under the Act, whichever first occurs, the Company shall furnish to the Investor
the following financial statements and reports,  such financial statements to be
prepared  in  accordance  with then  generally  accepted  accounting  principles
consistently applied:

                           (a) as soon as available,  and in any event within 30
days after the end of each month,  an unaudited  balance sheet of the Company as
of the end of such month and an unaudited statement of operations of the Company
for the  portion  of such  fiscal  year  ended  with the last day of such  month
prepared in accordance with generally  accepted  accounting  principles  (except
that no footnotes need be provided) and certified by the chief financial officer
of the Company, subject, however, to normal year-end audit adjustments;

                           (b) as soon as available,  and in any event within 90
days after the end of each fiscal year of the  Company,  a balance  sheet of the
Company as of the end of such fiscal  year,  a statement  of  operations  of the
Company for such fiscal  year,  and a statement of cash flows of the Company for
such fiscal year, all in reasonable  detail and stating in comparative  form the
figures as of the end of such fiscal year and for the  previous  fiscal year and
accompanied by an opinion  addressed to the Company from  independent  certified
public accountants;

                  In the event that the Company at any time  hereafter  shall be
required,  by  law  or by  then  generally  accepted  accounting  principles  to
consolidate its financial statements with those of a subsidiary corporation, the
Company  shall  thereafter  furnish the  financial  statements  required by this
Section  2.1 on a  consolidated  basis,  and the  monthly  and annual  financial
statements  specified  above shall be  furnished  with  consolidating  financial
statements.

                  2.2  Additional  Information.  For so long as the  Investor is
entitled to receive  information under Section 2.1 hereof, the Company shall (i)
furnish to the Investor such information con cerning the Company as the Investor
may from time to time reasonably  request;  (ii) offer the Investor the right to
visit the  properties  of the Company at  reasonable  times,  to  interview  key
employees of the Company at their places of employment  at reasonable  times and
to examine the books of account of the


                                      -12-









Company and to make copies  therefrom;  and (iii)  furnish  the  Investor,  upon
request,  with a complete and correct copy of the minutes of  proceedings of the
shareholders or Board of Directors.

                  2.3 Assignment of Certain  Rights.  The Investor may assign to
any transferee,  other than a competitor of the Company, and after giving notice
to the  Company,  the rights  granted  pursuant to Sections 2.1 and 2.2 provided
such  transferee  acquires at least 250,000 shares of Preferred Stock (or Common
Stock issued upon conversion thereof);  provided,  further that any Investor may
assign to its  constituent  partners,  former partners or the estate of any such
partners, other than a competitor of the Company, the rights granted pursuant to
Sections 2.1 and 2.2.  The total number of shares of Preferred  Stock (or Common
Stock issued upon  conversion) held by the Investor shall be aggregated with any
affil iated entities in order to determine the Investor's eligibility to receive
rights under this Section 2.

         3.       Miscellaneous.

                  3.1 Successors  and Assigns.  The terms and conditions of this
Agreement  shall  inure to the  benefit  of and be binding  upon the  respective
successors  and assigns of the parties.  Nothing in this  Agreement,  express or
implied,  is intended to confer upon any party other than the parties  hereto or
their respective successors and assigns any rights,  remedies,  obligations,  or
liabilities under or by reason of this Agreement,  except as expressly  provided
in this Agreement.

                  3.2  Governing  Law. This  Agreement  shall be governed by and
construed  under the laws of the State of  California  as applied to  agreements
among  California  residents  entered into and to be performed  entirely  within
California.

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

                  3.4 Titles and  Subtitles.  The titles and  subtitles  used in
this  Agreement  are used for  convenience  only and are not to be considered in
construing or interpreting this Agreement.

                  3.5 Notices. Unless otherwise provided, any notice required or
permitted  under this  Agreement  shall be given in writing  and shall be deemed
effectively  given upon  personal  delivery  to the party to be notified or upon
deposit with the United States Post Office,  by  registered  or certified  mail,
postage  prepaid  and  addressed  to the  party to be  notified  at the  address
indicated for such party on Attachment A, or at such other address as such party
may designate by ten (10) days' advance written notice to the other parties.

                  3.6 Amendment and Waivers. Except as may be otherwise provided
in  Section  1.15,  any  provision  of this  Agreement  may be  amended  and the
observance  thereof may be waived (either generally or in a particular  instance
and either  retroactively  or  prospectively),  with the written  consent of the
Company  and  the  Investors  holding  a  majority  of the  shares  held  by all
Investors.  Any  amendment or waiver  effected in  accordance  with this Section
shall be binding upon all present and future Investors.


                                      -13-















                                      -14-








                  3.7 Severability.  If one or more provisions of this Agreement
are held to be  unenforceable  under  applicable  law, such  provision  shall be
excluded  from  this  Agreement  and  the  balance  of the  Agreement  shall  be
interpreted  as if such  provision  were so excluded and shall be enforceable in
accordance with its terms.

                                                JENNER TECHNOLOGIES


Date:____________________                       By: /s/ ANTHONY E. MAIDA
                                                   -----------------------------
                                                Title: CEO
                                                      --------------------------

                                                HAYDEN LEASON:


Date:____________________                       /s/ HAYDEN LEASON
                                                -----------------
                                                Signature


                                                SERIES A INVESTORS:


Date:____________________                       ________________________________
                                                Name


                                                --------------------------------
                                                Signature





                                      -15-









      Attachment A to First Amended and Restated Investor Rights Agreement
      --------------------------------------------------------------------
<TABLE>
<CAPTION>


Name & Address of Investor                                         List of Registrable Securities
- --------------------------                                         ------------------------------

<S>                                                         <C>             
Hayden Leason                                                 Series A Preferred Stock - 8,000,000 shares
10 Monte Sol
Palmas Del Mar
Puerto Rico


William B. McClatchy 1982 Trust                               Series A Preferred Stock -   150,000 shares
William K. Coblentz and Carl Hoag, Co-Trustees
c/o  Julie Bouchard
Coblenz, Cahen, McCabe & Breyer
222 Kearney Street, 7th Floor
San Francisco, CA  94108


William B. and Susan McClatchy                                Series A Preferred Stock -   150,000 shares
1885 Mountain View Drive
Tiburon, CA  94920


Nancy Donnell Stefansky                                       Series A Preferred Stock -   250,000 shares
27255 Arnold Drive
Sonoma, CA  95476
</TABLE>



                                                                   EXHIBIT 10.14

                                 LEASE AGREEMENT


         1. Parties.  This lease,  dated for reference  purposes only,  Tuesday,
August 13, 1996, is made by and between Bay Business Centers,  Inc., Lessor, and
Jenner Technologies hereinafter called Lessee.

         2. Premises. Lessee hereby leases from Lessor the premises described as
2010 Crow Canyon Place, Suite #100, San Ramon, CA 94583, Office #330 & #332.

         3. Term. A six month term shall commence on September 1, 1996 and shall
continue until February 1, 1997. Lessee shall give a 60-day notice in writing of
its intent to renew or cancel  Lease  Agreement,  prior to  termination  date of
February 1, 1997. If a 60-day notice is not rendered, Lessor will consider Lease
Agreement to be renewed for an additional term, at the then going rate. Holdover
- - in the event Lessee  holds over beyond the end of the Lease term,  the monthly
recurring  charges shall be assessed at 150% their monthly rate and the holdover
period shall be for no less than one month.

         4.  Possession.  If Lessor for any  reason  whatsoever  cannot  deliver
possession  of the leased  premises  to Lessee at the  commencement  of the term
hereof, this shall not be void or voidable, nor shall Lessor be liable to Lessee
for any loss or damage resulting therefrom, nor shall the expiration date of the
above term be in any way extended,  but in that event,  all rent shall be abated
during the period  between the  commencement  of the term,  as  provided  for in
Paragraph 3 hereinabove,  and the time Lessor delivers possession.  In the event
that  Lessor  shall  permit  Lessee to occupy the leased  premises  prior to the
commencement  date of the term,  such  occupancy  shall be subject to all of the
provisions of this Lease Agreement.  Such early possession shall not advance the
termination date hereinabove provided.

         5. Rent. Lessee agrees to pay Lessor the sum of $1050.00 per month plus
$110.00 per phone set for phone equipment  rental per month due on the first day
of each month.  Any  installment  of rent or any other  recurring  sums due from
Lessee not  received  by Lessor  within  five (5) days after such  amount is due
shall be  assessed a late  charge  equal to ten  percent  (10%) of such  overdue
amount plus $50.00.  Clerical  Services  and Other  Services  incurred  shall be
invoiced  semimonthly  on the 15th and last day of each month.  Payment for said
services  are due and payable  within  thirty (30) days of billing  date. A late
charge equal to two percent  (2%) plus $10.00 will be assessed on said  services
if payment is not  received  within  thirty  (30) days of  billing  date.  If an
installment  for rent or invoice for  services is overdue  more than thirty (30)
days,  Lessor has the right to  discontinue  all services upon the  thirty-first
(31st) day of delinquency.  Billing inquiries and/or change of address should be
directed  towards:  Bay Business  Centers,  Inc., Attn:  Accounting  Dept., 4900
Hopyard Road, Suite #100, Pleasanton,  California 94588. In the event this Lease
Agreement  term  starts on a day other than the first of the month,  the monthly
recurring charges shall be prorated for the current month and collected with the
first full month plus last month.

         The monthly rental rate stated herein is predicated on providing office
space and services, as provided in Paragraphs 13 and 14, for 1 person(s).





Additional Reception Service    $100.00/each additional person - w/o voice mail
(receiving calls & caller's)    $125.00/each additional person - with voice mail

         Lessee  hereby  agrees to notify  Lessor in writing no less than thirty
(30) days prior to addition  of staff  members  for which  Lessor  will  provide
services.

         6. Prepaid Rent & Opening Charges. Concurrently with Lessee's execution
of this Lease Agreement, Lessee shall pay the Lessor the sum of:

<TABLE>
<CAPTION>
RECURRING CHARGES (1ST & LAST)
- -------------------------------------------------------------------------------------------------------
<S>                                                                                          <C>    
Office Rent (1st & last) (recurring charge).............................................       $2100.00
Additional Users (1st & last) (recurring charge)........................................          $0.00
Furniture:
(1st & last) (recurring charge).........................................................        $200.00
Mail Forwarding Service (1st & last) (recurring charge).................................          $0.00
Storage Rental (1st & last) (recurring charge)..........................................          $0.00
Additional Voice Mail Box Rental ($25/each/month) (1st & last) (recurring charge).......          $0.00
Voice Mail Paging (1st & last) (recurring charge).......................................          $0.00
Phone Line Service - Dial Tone (1st & last) (recurring charge)..........................        $120.00
Phone Equipment Rental (1st & last) (recurring charge)..................................        $220.00
Speed Dial (1st & last)(recurring charge)...............................................          $0.00
Conference Calling (1st & last) (recurring charge)......................................          $0.00
Call Forwarding (1st & last) (recurring charge).........................................          $0.00
Delayed Call Forwarding (1st & last) (recurring charge).................................          $0.00
Pacific Bell Directory Listing ($2/mo.) (1st & last) (recurring charge).................          $4.00
Copy Pkg. (1st) (recurring charge)......................................................          $0.00
Conference Pkg. (1st) (recurring charge)................................................          $0.00
Administrative Pkg. (1st) (recurring charge)............................................          $0.00
Secretarial Pkg. (1st) (recurring charge)...............................................          $0.00


ONE-TIME/INSTALLATION CHARGES                                                            
- -----------------------------------------------------------------------------------------
Administrative Start-up Fee (one-time charge)...........................................        $125.00
Additional Users Administrative Start-up Fee (one-time charge)..........................
Cleaning Fee ($200/Ofc.-less than 1 yr.) (one-time charge)..............................        $200.00
Furniture Move Fee (one-time charge)....................................................          $0.00
Furniture Set-Up Fee (one-time charge)..................................................          $0.00
Lobby Directory Listing (one-time charge)...............................................         $40.00
Key Deposit ($65/set X 2 Key Set(s)) (refundable).......................................        $130.00
Single Key Deposit ($33/key X (refundable)..............................................
Storage Installation (one-time charge)..................................................          $0.00
Voice Mail Installation (one-time charge)...............................................          $0.00
Voice Mail Paging Installation (one-time charge)........................................          $0.00
Phone Line Installation (one-time charge)...............................................        $241.00
Fax/Modem Install (one-time charge).....................................................        $185.00
Phone Equipment Installation (one-time charge)..........................................        $370.00                             
Calling Feature Installation (one-time charge)..........................................          $0.00
                                                                                              ---------
                                                                                        
         TOTAL..........................................................................       $3935.00
                                                                                              ---------
</TABLE>

*Phone  Line  Service  represents  monthly  fee for dial tone.  Phone Line Usage
(outgoing calls) is a variable charge and will be billed semimonthly, due within
10 days of statement date.


                                       -2-



         7.  Use.  The  premises  are to be used for  sales  and  administrative
purposes only.

         8.   Conditions.   Lessee  shall  not  disturb,   annoy,   endanger  or
inconvenience  other tenants in the building or suite,  nor use the premises for
any immoral, unlawful, or sleeping purposes, nor violate any law or ordinance or
commit waste, nuisance or damage upon or about the property.

         9.  Repairs,  Maintenance  and  Alterations.  Lessee shall at all times
during the term  hereof,  at its sole cost and  expense,  keep the  premises and
every part thereof in good condition and repair,  except damage thereto by fire,
earthquake,  act of God or the elements.  Lessee hereby waives the right to make
repairs at Lessor's  expense  under any law,  statute or ordinance  with respect
thereto now or hereafter in effect.  Unless otherwise expressly provided herein,
Lessor shall not be required to make any  improvements or repairs of any kind or
character on or to the leased premises during the term of this Lease  Agreement.
Lessee shall return,  upon  expiration  of this  Agreement the premises in their
original  configuration,  design, and condition to Lessor.  Lessee shall, at its
own cost and  expense,  repair or  replace  any  damage or injury to the  leased
premises, or any part thereof,  caused by Lessee or Lessee's agents,  employees,
invitees,  licensees,  or visitors;  provided,  however, if Lessee fails to make
such  repairs or  replacements  promptly,  Lessor may, at its option,  make such
repairs or  replacements,  and Lessee shall reimburse the cost thereof to Lessor
on demand,  together with interest at the maximum  annual rate  permitted by law
from the date of such work.

         If Lessee  vacates the  premises and leaves the premises in a condition
requiring  painting,  carpet  cleaning,  or other  maintenance  to  restore  the
premises  to  leasable  condition,  a minimum  fee of $200.00 per office will be
assessed and confirmed in the  termination  meeting (if  conducted) or within 30
days of date of vacancy.

         Lessee  agrees  to keep a floor  mat  under  any  and all  chairs  with
rollers/wheels at all times to protect the carpeting.

         10. Abandonment. If Lessee abandons or vacates the premises, Lessor may
at its option terminate this Lease  Agreement,  re-enter the premises and remove
all property.

         11. Essence of Time. Time is of the essence of this Lease Agreement and
all provisions hereof.

         12.  Insurance.  Lessee shall  indemnify  and hold  harmless  Lessor as
respects to any bodily injury or property damage arising out of their operations
and business conducted on premises. Lessee shall maintain liability insurance in
amounts  no less than  $300,000  combined  single  limit for  bodily  injury and
property damage.  Lessee shall provide Lessor with a certificate of insurance as
evidence  of the above  conditions  and Lessor  shall be named as an  additional
insured.


                                       -3-




         13.  Services.  Included in the monthly rental specified in Paragraph 5
herein,  Lessee shall be entitled to the following  clerical and  administrative
services:

Full-time  Receptionist  Service          Mail  Processing  Service 
(8:30 a.m.-5:00 p.m., Monday-Friday       Incoming Mail Sorted
excluding holidays)                       Outgoing - daily mail 10 pcs.

Telephone Answering                       Voice Mail 24 hrs./day,
8:30 a.m.-5:00 p.m.                       7 days/week
Monday-Friday, by Receptionist,           Complimentary 100 Voice Mail Msgs./Box
(excluding holidays)                      Additional messages @ $.35/ea.

                                          Access to Office, Building, & Copier
                                          24 hrs./day, 7 days/week

Hourly Office Rental/                     Access to:
Conference Room Facilities                Secretarial Services
By Reservation                            8:30 a.m. - 5:00 p.m.
4 Hours/month included                    Monday-Friday,
(non-cumulative)                          (excluding holidays)
                                          (Billed as Utilized, see Exhibit B)

         Lessee hereby agrees all telephone  equipment and line services will be
coordinated by Lessor with Lessor's  telephone  vendor.  Lessee shall not modify
nor change outlets, telephone sets, or jacks.

         14. Services & Non-Service Items.  Services and non-service items shall
be invoiced  semi-monthly  on the 15th and last day of each  month.  Payment for
said  services are due and payable  within  thirty (30) days of billing  date. A
finance  charge of 2% per month will be assessed for all services and  recurring
charges unpaid beyond 30 days of the invoice date.

         At the end of a term,  all charges and credits  will be applied.  It is
understood  freight  bills  and  vendor  charges  may take up to 60 days to pass
through Lessee,  therefore a 90-day period may be required to reimburse  credits
or conclude final account balance.

         If collection  time is required due to delinquent  account status a fee
of $45/hour will be assessed for  administrative  time at a minimum of $9.00 per
collection contact.

SERVICES
- --------
Secretarial Service                     Minimum billable unit 1/10 of an hour.
See Exhibit B for Rates

Word Processing (keyboarding)           Minimum billable unit 3/10 of an hour. 
See Exhibit B for Rates                 Minimum per page 3/10 of an hour(input).
                                        Editing - Minimum 2/10 of an hour.


                                       -4-




         Standard  Turnaround - 1-3 pages (24 hrs.) 4 or more pages - turnaround
determined by Bay Business Centers, Inc.

         Lessee  agrees that during the term of this  Agreement  and for six (6)
months after its  termination  will not offer  employment  to or hire any of the
employees  of Lessor.  If Lessee  does not keep that  agreement,  Lessee will be
liable to Lessor for  damages  in the sum of  twenty-five  percent  (25%) of the
annual  compensation  of each employee  involved,  it being  mutually  agreed by
Lessee and Lessor that this provision for  liquidated  damages is reasonable and
that the actual  damage  which would be  sustained  by Lessor as the result of a
failure to keep the agreement  would be, from nature of the case,  impracticable
or extremely difficult to fix.

         Further,  Lessee  shall not provide,  utilize,  or sell any services or
non-service items,  which are provided by Bay Business Centers,  Inc., as listed
on Exhibit B to other tenants or clients of Bay Business  Centers,  Inc., or for
any other person or company.

         Lessee shall not contract  with an  independent  contractor,  temporary
personnel agency, or individual for the purpose of providing  secretarial,  word
processing, or any services Bay Business Centers, Inc. provides.

         If Lessee  wishes to employ an  administrative  assistant  or  clerical
staff member,  it is with the  understanding an additional office must be leased
from Bay Business Centers,  Inc. and prior written approval is obtained from Bay
Business Centers, Inc. for its use.

         15. Notices. In every instance where it shall be necessary or desirable
for the Lessee to serve any notice or demand  upon the  Lessor,  such  notice or
demand shall be sent by United States  "Registered" or "Certified" mail, postage
prepaid, addressed to:

                              Ms. Marilyn L. Newton
                           Bay Business Centers, Inc.
                        2010 Crow Canyon Road, Suite 100
                               San Ramon, CA 94583

or at such other address of Lessor, as may appear on the records of Lessee.  Any
notice or demand to be given by the Lessor to the Lessee  shall be  effective if
mailed to (Lessee's administrative office):

                                 Mr. Tony Maida
                               Jenner Technologies
                                828 Eastbrook Ct.
                               Danville, CA 94506

Notice  mailed as  aforesaid  shall be deemed to have been served at the time of
postal meter cancellation date.


                                       -5-



         16.  Occupancy/Use of Premises.  Lessee shall not assign this Lease nor
permit the occupancy or use of any part thereof  without the written  permission
of Lessor.

         Lessee will not install or maintain a coffee maker or copier machine in
Lessee's office. Lessee further acknowledges smoking is not permitted within the
suite and must be restricted to outside of the suite.

         17.  Attorneys  Fees.  In an event of any legal  action  or  proceeding
brought by either  party  against  the other  under this  Lease  Agreement,  the
prevailing  party  shall be  entitled  to  recover  all its costs and  expenses,
including  without  limitation  the fees and  costs of  appeal,  if any,  of its
attorneys of such action or proceeding in such amount as is reasonable.

LESSEE:                                               LESSOR:
Jenner Technologies                                   Bay Business Centers, Inc.

By: /s/ ANTHONY E. MAIDA                              By: /s/ MARILYN L. NEWTON
   -----------------------------                         -----------------------
        Anthony E. Maida, III                         Title:  President
        Chief Executive Officer                       Name:  Marilyn L. Newton
        Jenner Technologies
        828 Eastbrook Court
        Danville, CA  94506



                                       -6-



                                    Exhibit A

                               [Plan of Premises]






                                    Exhibit B

   Minimum time usage is assessed as an "Administrative Assist"* at $2.00/each

                            Priority Service Charges
- --------------------------------------------------------------------------------
1-4 Hours=Priority 1+50%    4-8 Hours=Priority 2+25%    Overtime Required= +100%

<TABLE>
<CAPTION>
                             Project Classification
====================================================================================================================================
 CLASS                        DESCRIPTION                       CLASS                       DESCRIPTION
====================================================================================================================================
<S>      <C>                                                     <C>   <C>   
1         Typed or clearly written source document; no edits      2     Typed or written requiring minor edits/single level
          required.                                                     outline format/minor tabbing.
- ------------------------------------------------------------------------------------------------------------------------------------
3         Difficult to read; major edits required.                4     Technical.
====================================================================================================================================
</TABLE>

<TABLE>
<CAPTION>
   CODE                             SERVICE DESCRIPTION                                    RATE                  UNITS
- ------------------------------------------------------------------------------------------------------------------------------------
<S>        <C>                                                                          <C>                  <C>   
AAA         Administrative Assistance - Bookkeeping or Mgt. Assistance..........           30.0                 Per Hour
ADT         Administrative Assists* (minimum clerical fee)......................            2.0                 Each
AIR         Airborne Shipping...................................................            0.0                 Cost + 20%
ASV         Answering Service...................................................          100.0                 Monthly
BIN         Binding.............................................................            3.5                 Each
SCP         Color Prints (Laser)................................................            2.5                 Each
COP         Copying.............................................................             .1                 Each
CRF         Conference Room/Flex Ofc. Rental (COD Clients)......................           25.0                 Per Hour
CRC         Conference/Flex Ofc. Rental (On-Account Clients)....................           20.0                 Per Hour
CSP         Coffee by the Pot (for meetings)....................................           10.0                 Each
DIR         Directory Listing (or directory change).............................           40.0                 Each    
DSS         Disk Storage (200.000 characters/disk)..............................          20.06                 Months
DUP         Duplicate Statement.................................................            5.0                 Each
EMS         Extra Messages (after monthly allowance)............................             .3                 Each
FAX         Facsimile Service...................................................            1.0                 Each Pg.
FMA         Furniture Initial Set-up............................................           50.0                 Per Office
FMV         Furniture Move......................................................            0.0                 Variable
FNT         Furniture Rental....................................................            0.0                 Per Month
FXW         Facsimile Service - Word Processing Work TO a Client................             .2                 Each Pg.            
GRP         Graphics............................................................           55.0                 Per Hour
IFM         If/Relay Message/Paging (Special Msg. Handling).....................            2.0                 Each
LAM         Lamination (Business Card Size or 8 1/2 x 11).......................    1.5 or 4.00                 Each
LMC         Long Handwritten Message............................................            2.0                 Each
LPO         List/Label Printout.................................................            2.5                 Page
MLG         Mailings:  Parcel/Express/Certified Mail Prep.......................            4.0                 Each
MSS         Mailing Address Svc.................................................           35.0                 Monthly
OLS         Overnight/Express Letter Service....................................           12.5                 Each
PCC         Phone Call (Outgoing Calls made by BBC Staff)............75/local; 1.25/toll; 2.50/LD               Each
PHH         Parcel Handling - Parcel Delivery to Office.........................            2.0                 Each
POS         Postage.............................................................            0.0                 Cost + 20%
PRS         Presentations - Multiple Font Documents.............................           45.0                 Per Hour
SPO         Printouts (per page or envelope).................................75/black; 2.50/color               Per/Pg.
REN         Rent (monthly recurring per contract)...............................            0.0                 Variable
SSS         Resume & Consultation Services......................................       By Quote                 Per Service
SCN         Scanning............................................................           10.0                 Per Image
SHP         Ship via BBC (client uses their Acct. #)............................            1.0                 Each Piece
SCR         Secretarial Service - Regular, 24-hour Turnaround...................           22.0                 Per Hour
SC2         Secretarial Service - 4-8/hour Turnaround...........................           27.5                 Per Hour
SC1         Secretarial Service - 1-4/hour Turnaround...........................           33.0                 Per Hour
SCV         Secretarial Service - Requiring Overtime............................           44.0                 Per Hour
SPS         Spreadsheets........................................................           40.0                 Per Hour
TER         Telephone Equip. Rental.............................................           55.0                 Per Set/Mo.
UPS         UPS Shipment (Parcels)..............................................            0.0                 Cost + 20%
VMS         Voice Mail Box......................................................           25.0                 Each
WIT         Witness Signatures..................................................            6.0                 Each
WCR         Word Processing Client - Regular, 24-hour Turnaround................           30.0                 Per Hour
WC2         Word Processing Client - 4-8/hour Turnaround........................           37.5                 Per Hour
WC1         Word Processing Client - 1-4/hour Turnaround........................           45.0                 Per Hour
WCV         Word Processing Client - Requiring Overtime.........................           60.0                 Per Hour
WPR         Word Processing Tenant - Regular, 24-hour Turnaround................           27.0                 Per Hour
WP2         Word Processing Tenant - 4-8/hour Turnaround........................           33.7                 Per Hour
WP1         Word Processing Tenant - 1-4/hour Turnaround........................           40.5                 Per Hour
WPV         Word Processing Tenant - Requiring Overtime.........................           54.0                 Per Hour
YSS         Supplies (see Supplies Price List)..................................            0.0                 Variable
</TABLE>

PRICES SUBJECT TO CHANGE AT THE DISCRETION OF BAY BUSINESS CENTERS, INC.


                                       -1-





                                                                    EXHIBIT 11.1

              STATEMENT OF COMPUTATION OF NET LOSS PER SHARE


<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31,
                                                           --------------------------------------
                                                              1994         1995          1996
                                                           -----------  -----------   -----------
<S>                                                        <C>          <C>          <C>
Net Loss ...........................................         (705,111)    (876,866)   (2,687,835)
Weighted average shares of Common Stock outstanding         1,398,996    1,410,923     2,453,904
Shares related to staff accounting bulletin topic 4D:
   Stock options ...................................          164,008      164,008       164,008
   Common Stock ....................................        1,700,443    1,700,443       657,936
Shares used in computing net loss per share ........        3,263,447    3,275,374     3,275,848
Net loss per share .................................       $    (0.22)  $    (0.27)  $     (0.82)
Calculation of shares outstanding for computing pro
  forma net loss per share:
   Shares used in computing net loss per share .....        3,263,447    3,275,374     3,275,848
   Adjusted to reflect the effect of the assumed con-
     version  of Preferred Stock from the date of
     issuance(1) ...................................        1,196,413    1,345,102     1,510,015
Shares used in computing pro forma net loss per share       4,459,860    4,620,476     4,785,863
Pro forma net loss per share .......................       $    (0.16)  $    (0.19)  $     (0.56)

</TABLE>

- -------------
(1) Series A and B.





                                                                    EXHIBIT 23.2


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

     We  consent  to the  reference  to our firm  under the  captions  "Selected
Financial  Data" and  "Experts"  and to the use of our report dated  January 14,
1997 (except Note 7, as to which the date is March , 1997), in the  Registration
Statement (Form S-1 ) and related  Prospectus of Jenner  Technologies,  Inc. for
the  registration  of  2,875,000  shares  of  its  common  stock  and  2,875,000
redeemable common stock purchase warrants.


Palo Alto, California
March __,1997

- --------------------------------------------------------------------------------

The foregoing  consent is in the form that will be signed upon the completion of
the  restatement  of  capital  accounts   described  in  Note  7  the  financial
statements.


Palo Alto, California                              /s/ ERNST & YOUNG LLP
February 18, 1997


<TABLE> <S> <C>


<ARTICLE>                     5
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                              DEC-31-1996
<PERIOD-START>                                 JAN-01-1996
<PERIOD-END>                                   DEC-31-1996
<CASH>                                         1428510
<SECURITIES>                                   0
<RECEIVABLES>                                  0
<ALLOWANCES>                                   0
<INVENTORY>                                    0
<CURRENT-ASSETS>                               1531024
<PP&E>                                         35637
<DEPRECIATION>                                 16153
<TOTAL-ASSETS>                                 1563392
<CURRENT-LIABILITIES>                          213577
<BONDS>                                        3201985
                          0
                                    2310400
<COMMON>                                       619155
<OTHER-SE>                                     4781726
<TOTAL-LIABILITY-AND-EQUITY>                   1563392
<SALES>                                        0
<TOTAL-REVENUES>                               0
<CGS>                                          0
<TOTAL-COSTS>                                  0
<OTHER-EXPENSES>                               2546848
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             140987
<INCOME-PRETAX>                                0
<INCOME-TAX>                                   0
<INCOME-CONTINUING>                            (2687835)
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   (2687835)
<EPS-PRIMARY>                                  (.82)
<EPS-DILUTED>                                  (.82)
        


</TABLE>


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