INFORMAX INC
S-1/A, EX-1.1, 2000-09-19
COMPUTER PROGRAMMING SERVICES
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                                                                     EXHIBIT 1.1




                        _________ SHARES OF COMMON STOCK

                                 INFORMAX, INC.

                             UNDERWRITING AGREEMENT

                                                                    ______, 2000

BEAR, STEARNS & CO. INC.
U.S. BANCORP PIPER JAFFRAY INC.
ADAMS, HARKNESS & HILL
     as Representatives of the
     several Underwriters named in
     Schedule I attached hereto
c/o Bear, Stearns & Co. Inc.
245 Park Avenue
New York, NY  10167

Ladies and Gentlemen:

         InforMax,  Inc., a corporation organized and existing under the laws of
Delaware (the "Company"),  proposes,  subject to the terms and conditions stated
herein, to issue and sell to the several underwriters named in Schedule I hereto
(the "Underwriters") an aggregate of _________ shares (the "Firm Shares") of its
common stock, par value $0.01 per share (the "Common Stock"),  and, for the sole
purpose of  covering  over-allotments  in  connection  with the sale of the Firm
Shares,  at the option of the Underwriters,  up to an additional  _______ shares
(the  "Additional  Shares") of Common Stock.  The Firm Shares and any Additional
Shares purchased by the Underwriters are referred to herein as the "Shares." The
Shares are more fully described in the Registration Statement referred to below.

         1.   Representations  and  Warranties  of  the  Company.   The  Company
represents and warrants to, and agrees with, the Underwriters that:

                  (a) The Company  has filed with the  Securities  and  Exchange
Commission  (the   "Commission")  in  accordance  with  the  provisions  of  the
Securities Act of 1933, as amended (the "Act"), and the rules and regulations of
the Commission thereunder (the "Regulations") a registration statement,  and may
have filed an amendment or amendments thereto, on Form S-1 (No. 333-41194),  for
the  registration  of the Shares  under the Act.  Such  registration  statement,
including the prospectus,  financial statements and schedules,  exhibits and all
other documents filed as a part thereof, as amended at the time of effectiveness
of the  registration  statement,  including any information  deemed to be a part
thereof as of the time of  effectiveness  pursuant to paragraph (b) of Rule 430A
or Rule 434 of the Regulations,  is herein called the  "Registration


<PAGE>

Statement"  and the  prospectus,  in the form first  filed  with the  Commission
pursuant to Rule 424(b) of the Regulations or filed as part of the  Registration
Statement at the time of  effectiveness  if no Rule 424(b) or Rule 434 filing is
required,  is herein called the "Prospectus".  Any registration  statement filed
pursuant to Rule 462(b) of the  Regulations  is herein  called the "Rule  462(b)
Registration Statement",  and after such filing any reference herein to the term
"Registration  Statement" shall include such Rule 462(b) Registration Statement.
The term "preliminary  prospectus" as used herein means a preliminary prospectus
as  described in Rule 430 of the  Regulations.  All of the Shares have been duly
registered under the Act pursuant to the Registration  Statement or, if any Rule
462(b)  Registration  Statement is filed,  have been or will be duly  registered
under  the Act with the  filing  of such  Rule  462(b)  Registration  Statement.
Neither  the  Commission  nor  the  Blue  Sky  or  securities  authority  of any
jurisdiction  has  issued  a stop  order  suspending  the  effectiveness  of the
Registration  Statement,  preventing  or suspending  the use of any  preliminary
prospectus,  the  Prospectus,  the  Registration  Statement or any  amendment or
supplement  thereto,  refusing to permit the  effectiveness  of the Registration
Statement or suspending the registration or qualification of the Shares, nor, to
the Company's knowledge, has any of such authorities instituted or threatened to
institute any proceedings with respect to a stop order.

                  (b)  At the  time  of the  effectiveness  of the  Registration
Statement or any Rule 462(b) Registration  Statement or the effectiveness of any
post-effective  amendment to the Registration Statement,  when the Prospectus is
first  filed  with the  Commission  pursuant  to Rule  424(b) or Rule 434 of the
Regulations, when any supplement to or amendment of the Prospectus is filed with
the Commission  and at the Closing Date and the Additional  Closing Date, if any
(as  hereinafter  respectively  defined),  the  Registration  Statement  and the
Prospectus and any amendments  thereof and supplements  thereto complied or will
comply in all material  respects with the  applicable  provisions of the Act and
the  Regulations  and does not or will not  contain  an  untrue  statement  of a
material  fact and does not or will not omit to state any material fact required
to be stated therein or necessary in order to make the statements therein (i) in
the case of the Registration  Statement,  not misleading and (ii) in the case of
the Prospectus,  in light of the  circumstances  under which they were made, not
misleading and the  Prospectus,  any  preliminary  prospectus and any supplement
thereto, at their respective times of issuance and at the Closing Date, complied
and will comply in all material respects with any applicable laws or regulations
of  foreign   jurisdictions   in  which  the  Prospectus  and  such  preliminary
prospectus,  as amended or  supplemented,  if  applicable,  are  distributed  in
connection  with the  offer  and sale of the  Directed  Shares  (as  hereinafter
defined).  No  representation  and  warranty  is made in  this  subsection  (b),
however,  with  respect to any  information  contained  in or  omitted  from the
Registration  Statement or the Prospectus or any related preliminary  prospectus
or  any  amendment  thereof  or  supplement  thereto  in  reliance  upon  and in
conformity with information  furnished in writing to the Company by or on behalf
of any Underwriter  through you as herein stated expressly for use in connection
with the preparation  thereof. If Rule 434 is used, the Company will comply with
the requirements of Rule 434.

                  (c) Deloitte & Touche LLP, who have  certified  the  financial
statements and supporting schedules included in the Registration Statement,  are
independent public accountants as required by the Act and the Regulations.



                                       2
<PAGE>

                  (d) Subsequent to the respective dates as of which information
is given in the Registration  Statement and the Prospectus,  except as set forth
in the  Registration  Statement and the  Prospectus,  there has been no material
adverse change in the business,  prospects,  properties,  operations,  condition
(financial or other) or results of operations of the Company  ("Material Adverse
Change"),  whether or not arising from  transactions  in the ordinary  course of
business,  and since  the date of the  latest  balance  sheet  presented  in the
Registration  Statement  and the  Prospectus,  the Company  has not  incurred or
undertaken any  liabilities  or  obligations,  direct or  contingent,  which are
material  to the  Company,  except  for  liabilities  or  obligations  which are
reflected in the Registration Statement and the Prospectus.

                  (e) This Agreement and the  transactions  contemplated  herein
have been duly and validly  authorized  by the Company,  and this  Agreement has
been duly and validly  executed and delivered by the Company and is  enforceable
against the Company in accordance with its terms,  except as rights to indemnity
may be limited by federal or state  securities laws relating  thereto and except
as  enforcement  (i) may be limited by bankruptcy,  insolvency,  reorganization,
moratorium or other similar laws relating to or affecting  creditors' rights and
remedies  generally  and  (ii)  is  subject  to  general  principles  of  equity
(regardless  of whether such  enforceability  is  considered  in a proceeding in
equity or law).

                  (f) The execution,  delivery and performance of this Agreement
and the consummation of the transactions contemplated hereby do not and will not
(i) conflict with or result in a breach of any of the terms and  provisions  of,
or  constitute  a default (or an event  which with  notice or lapse of time,  or
both, would constitute a default) under, or result in the creation or imposition
of any lien,  charge or  encumbrance  upon any property or assets of the Company
pursuant to, any  contract,  agreement,  instrument,  understanding,  franchise,
license  or permit to which the  Company is a party or by which it or any of its
properties or assets may be bound or (ii) violate or conflict with any provision
of the  certificate  of  incorporation  or the  by-laws  of the  Company  or any
judgment, decree, order, statute, rule or regulation of any court or any public,
governmental or regulatory  agency or body having  jurisdiction over the Company
or any of its properties or assets,  except,  in each case, for such  conflicts,
breaches  or  violations  that  would not have a  Material  Adverse  Effect  (as
hereinafter defined). No consent, approval, authorization,  order, registration,
filing,  qualification,  license  or permit of or with any court or any  public,
governmental or regulatory  agency or body having  jurisdiction over the Company
or any of its properties or assets is required for the  execution,  delivery and
performance  of  this  Agreement  or  the   consummation  of  the   transactions
contemplated hereby,  including the issuance, sale and delivery of the Shares to
be issued, sold and delivered by the Company hereunder,  except the registration
under  the Act of the  Shares  and  such  consents,  approvals,  authorizations,
orders, registrations,  filings, qualifications,  licenses and permits as may be
required under state securities or Blue Sky laws or foreign  equivalents of such
regulations or statutes,  where applicable,  in connection with the purchase and
distribution of the Shares by the Underwriters.

                  (g) Upon the sale of the Firm Shares on the Closing Date,  the
only shares of capital stock of the Company issued and  outstanding  (other than
the  Shares)  will be  ________  shares of Common  Stock.  All of the issued and
outstanding  shares  of  capital  stock of the  Company  are  duly  and  validly
authorized and issued, fully paid and nonassessable, and none of such shares was
issued in violation of or is subject to any  preemptive or similar  rights.  The
Shares  have been  duly and  validly  authorized  for  issuance  and sale to the
Underwriters  pursuant


                                       3
<PAGE>

to this  Agreement  and, when  delivered by the Company in accordance  with this
Agreement,  will be duly and  validly  issued  and  outstanding,  fully paid and
nonassessable and will not have been issued in violation of or be subject to any
preemptive or similar  rights.  The Company had, at June 30, 2000, an authorized
and outstanding  capitalization  as set forth in the Registration  Statement and
the Prospectus.  The authorized capital stock of the Company, including the Firm
Shares and the Additional Shares,  conforms to the description thereof contained
in the  Registration  Statement and the  Prospectus.  Except as disclosed in the
Registration  Statement and the  Prospectus,  there are no outstanding  options,
warrants  or other  rights  calling  for the  issuance  of, and no  commitments,
obligations,  plans or arrangements to issue, any shares of capital stock of the
Company or any security  convertible  into or exchangeable  for capital stock of
the Company.  The outstanding  stock options and warrants relating to the Common
Stock  have  been  duly  authorized  and  validly  issued  and  conform  to  the
descriptions thereof contained in the Registration Statement and the Prospectus.

                  (h)  The  Company  has  been  duly  organized  and is  validly
existing as a corporation in good standing under the laws of its jurisdiction of
incorporation. The Company is duly qualified to transact business and is in good
standing as a foreign  corporation in each  jurisdiction  in which the character
and location of its properties (owned,  leased or licensed) or nature or conduct
of its business makes such qualification necessary,  except where the failure to
so qualify would not have a material adverse effect (considered  individually or
when  aggregated  with  other  such  instances)  on  the  business,   prospects,
properties,  operations, condition (financial or other) or results of operations
of the Company (a  "Material  Adverse  Effect").  The Company has all  requisite
power and  authority  and all  necessary  consents,  approvals,  authorizations,
orders,  registrations,  qualifications,  licenses  and  permits  (collectively,
"Governmental  Licenses")  of and from all public,  regulatory  or  governmental
agencies and bodies,  to own,  lease and operate its  properties and conduct its
business as now being conducted and as described in the  Registration  Statement
and the  Prospectus,  and each such  Governmental  License  is valid and in full
force and effect. No such Governmental License contains a materially  burdensome
restriction  not  adequately  disclosed in the  Registration  Statement  and the
Prospectus,  and the Company has not received any notice of  proceedings  to the
revocation of any such Governmental  Licenses. The Company is in compliance with
all applicable  laws,  orders,  rules,  regulations,  ordinances and directives,
except where the failure to be in compliance  would not have a Material  Adverse
Effect. The Company does not have any subsidiaries as defined in Rule 405 of the
Regulations,  other  than its  [66.67]%  interest  in [Name of  InforMax  French
subsidiary],  a  French  company  [which  is not now  conducting  and has  never
conducted any operations,  does not own, lease, license or otherwise possess and
has never owned,  leased,  licensed or otherwise  possessed any rights or assets
related to the Company's business,  and is not subject to any claim or liability
(absolute or contingent,  known or unknown)]. The Company does not presently own
or  control,  directly or  indirectly,  any  interest in any other  corporation,
association  or other  business  entity,  other  than its  interest  in [Name of
InforMax French subsidiary].

                  (i) The Company is not in violation in any material respect of
any provision of its certificate of incorporation or of its by-laws or in breach
of, or in default under (nor has any event  occurred that with notice,  lapse of
time, or both,  would  constitute a breach of, or default  under),  except where
such breach or default would not have a Material  Adverse Effect,  any provision
of any agreement,  instrument,  franchise, lease, license or permit to which the
Company is a party or by which any of its  properties  or assets may be bound or
affected or any  judgment,


                                       4
<PAGE>

decree,  order,  statute,  rule  or  regulation  of any  court  or  any  public,
governmental or regulatory  agency or body having  jurisdiction over the Company
or any of its properties or assets.

                  (j)   There  is  no   litigation,   arbitration,   proceeding,
investigation  or claim to which the Company is a party or to which any property
or assets of the Company are subject  which is pending or, to the  knowledge  of
the Company,  threatened or contemplated  against the Company which might result
in any Material  Adverse Effect or any development  involving a Material Adverse
Effect or which is required to be disclosed in the  Registration  Statement  and
the Prospectus,  except as has been disclosed in the Registration  Statement and
the Prospectus.

                  (k) Neither the Company nor any of its directors,  officers or
affiliates (as defined in the Regulations)  has taken or will take,  directly or
indirectly,  any action designed to cause or result in, or which  constitutes or
which  might  reasonably  be  expected  to  constitute,   the  stabilization  or
manipulation  of the price of the shares of Common Stock to facilitate  the sale
or resale of the Shares or a  violation  of  Regulation  M under the  Securities
Exchange Act of 1934, as amended (the "Exchange Act").

                  (l) The financial statements, including the notes thereto, and
supporting  schedules included in the Registration  Statement and the Prospectus
present fairly the financial  position of the Company as of the dates  indicated
and the results of its  operations  for the periods  specified;  said  financial
statements have been prepared in conformity with generally  accepted  accounting
principles applied on a consistent basis; and the supporting  schedules included
in the  Registration  Statement  present fairly the  information  required to be
stated  therein;  and the  selected  financial  data and the  summary  financial
information  included in the Registration  Statement and the Prospectus  present
fairly  the  information  shown  therein  and  have  been  compiled  on a  basis
consistent with that of the financial  statements  included in the  Registration
Statement and the Prospectus. No other financial statements are required by Form
S-1 or otherwise to be included in the Registration  Statement of the Prospectus
other than those included therein.

                  (m) Except as described in the Registration  Statement and the
Prospectus and except for rights that have been  effectively  waived in writing,
which  waivers  are in full force and  effect,  no holder of  securities  of the
Company has any rights to cause the Company to issue to it, or register pursuant
to the  Act,  any  securities  of the  Company  because  of  the  filing  of the
Registration  Statement or otherwise,  in connection with the sale of the Shares
contemplated  hereby or  otherwise.  No holder of  securities of the Company has
preemptive rights or other rights to purchase any of the Shares.

                  (n)  The  Company  is  not,  and  upon   consummation  of  the
transactions  contemplated  hereby and the application of the proceeds therefrom
as described in the Prospectus will not be, an "investment  company" or a person
"controlled"  by an "investment  company"  under the  Investment  Company Act of
1940.

                  (o) The Common  Stock of the  Company,  including  the Shares,
have been  approved  for  quotation on the National  Association  of  Securities
Dealers Automated Quotation National Market System.



                                       5
<PAGE>

                  (p)  The  Company  owns or  possesses  valid  and  enforceable
licenses or other rights to use all inventions,  patents,  patent  applications,
trademarks,  service  marks,  trade  names,  copyrights,  technology,  software,
databases,  Internet domain names,  know-how  (including trade secrets and other
unpatented and/or unpatentable proprietary or confidential information,  systems
or procedures),  proprietary techniques (including processes and substances) and
other  intellectual  property  rights  used in, or  necessary  to  conduct,  the
business now conducted by the Company or presently  contemplated to be conducted
as described in the  Registration  Statement and the  Prospectus  (collectively,
"Intellectual  Property") free and clear of all liens,  claims and encumbrances,
except where the failure to own or possess such rights would not  reasonably  be
expected  to have a Material  Adverse  Effect;  other than as  described  in the
Registration  Statement and the  Prospectus:  (i) there are no third parties who
have any rights in the  Intellectual  Property  that could  preclude the Company
from conducting its business as currently conducted or as presently contemplated
to be conducted as described in the Registration Statement and the Prospectus in
any material respect;  (ii) there are no pending or threatened  actions,  suits,
proceedings,  investigations  or claims by others  challenging the rights of the
Company or (if the  Intellectual  Property is licensed) the licensor thereof (to
the Company's  knowledge) in any Intellectual  Property owned or licensed to the
Company;  (iii)  neither  the  Company  nor (if  the  Intellectual  Property  is
licensed) the licensor  thereof (to the Company's  knowledge) has infringed,  or
received any notice of  infringement  of or conflict  with, any rights of others
with respect to the Intellectual  Property; and (iv) there is no dispute between
it and any licensor with respect to any Intellectual  Property.  The Company has
taken all reasonable  steps to protect,  maintain and safeguard the Intellectual
Property for which improper or unauthorized disclosure would impair its value or
validity  and has entered into  appropriate  nondisclosure  and  confidentiality
agreements and made appropriate filings and registrations in connection with the
foregoing.

                  (q) The Company has timely filed all federal, state, local and
foreign  income and franchise  tax returns and reports  required to be filed and
has paid all taxes  shown  thereon  and all  assessments  received  by it to the
extent  that such taxes  have  become  due and are not being  contested  in good
faith,  and  there is no tax  deficiency  that has  been  or,  to the  Company's
knowledge, might be asserted or threatened against the Company that might have a
Material Adverse Effect; and all tax liabilities are adequately  provided for on
the books of the Company.

                  (r)  The  Company   maintains   insurance   with  insurers  of
recognized  financial  responsibility  of  the  types  and in  the  amounts  (i)
generally  deemed  adequate  for its  business  and  consistent  with  insurance
coverage maintained by similar companies in similar businesses and (ii) required
under any of the Company's agreements, licenses or other contracts, all of which
insurance is in full force and effect; the Company has no reason to believe that
it will not be able to renew its existing  insurance  as and when such  coverage
expires or to obtain  similar  insurance  with  similar  insurers  adequate  and
customary  for its business and  sufficient to satisfy any  requirements  of its
contracts at a cost that would not have a Material Adverse Effect.

                  (s) The Company is in compliance with all applicable  federal,
state,  local  or  foreign  laws,  regulations,  rules,  ordinances,  orders  or
directives  relating to pollution or (in  connection  therewith)  protection  of
human health and safety, the environment (including, without limitation, ambient
air, surface water, groundwater, land surface or subsurface strata) or wildlife,
including,  without limitation,  laws and regulations relating to the release or
threatened


                                       6
<PAGE>

release  of  chemicals,  pollutants,  contaminants,  wastes,  toxic  substances,
hazardous substances, petroleum or petroleum products (collectively,  "Hazardous
Materials") or to the manufacture,  processing,  distribution,  use,  treatment,
storage,  disposal,  transport or handling of Hazardous Materials (collectively,
"Environmental Laws"); to the Company's knowledge,  no material expenditures are
or will be required to comply with the Environmental Laws, and the Company holds
all permits,  licenses and approvals required to conduct its business thereunder
and is in compliance  with all terms and conditions of any such permit,  license
or approval, except where such noncompliance or failure to comply with the terms
and  conditions of, or failure to receive,  such permits,  licenses or approvals
will not singly or in the  aggregate  have a  Material  Adverse  Effect;  to the
Company's  knowledge,  all  properties  and assets  leased or owned,  including,
without limitation, all structures,  contents, soil, subsoil and groundwater, do
not contain Hazardous Materials; and to the Company's knowledge, the Company has
no  liability or  obligation,  whether to any  governmental  authority or to any
other  person  or  entity,  for  damages,  claims,  penalties,   forfeitures  or
otherwise, as a consequence of the generation, transportation or disposal of any
Hazardous Materials or otherwise under the Environmental Laws.

                  (t)  The  Company  has  good  and  marketable   title  to  all
properties  (real  and  personal)  owned by the  Company,  free and clear of all
mortgages,   pledges,  liens,  security  interests,   claims,   restrictions  or
encumbrances  of any kind  except  such as do not,  singly or in the  aggregate,
materially  affect the value of such  property and do not  materially  interfere
with the use made and proposed to be made of such  property by the Company;  and
all properties  held under lease or license by the Company are held under valid,
existing and enforceable leases or licenses.

                  (u) The  Company  maintains  a system of  internal  accounting
controls  sufficient to provide  reasonable  assurance that (i) transactions are
executed in accordance with  management's  general and specific  authorizations,
(ii)  transactions are recorded as necessary to permit  preparation 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.

                  (v) No labor  dispute  with the  employees  of the  Company is
pending,  or, to the Company's  knowledge,  is imminent;  and the Company is not
aware of any existing, threatened or imminent labor disturbance by the employees
of  any  of  its  principal  suppliers,  collaborative  or  strategic  partners,
manufacturers or contractors that could result in any Material Adverse Effect.

                  (w) Each employee benefit plan,  within the meaning of Section
3(3) of the  Employee  Retirement  Income  Securities  Act of 1974,  as  amended
("ERISA"), that is maintained, administered or contributed to by the Company for
employees or former  employees of the Company has been  maintained in compliance
with its  respective  terms and the  requirements  of any  applicable  statutes,
orders,  rules  and  regulations,  including  but not  limited  to ERISA and the
Internal  Revenue  Code  of  1986,  as  amended  (the  "Code").   No  prohibited
transaction,  within the meaning of Section 406 of ERISA or Section  4975 of the
Code,  has occurred with respect to any such plan that could result in liability
to the  Company,  excluding  transactions  effected  pursuant to a statutory  or
administrative  exemption.  For each such plan that is  subject  to the  funding
rules


                                       7
<PAGE>

of Section  412 of the Code or Section  302 of ERISA,  no  "accumulated  funding
deficiency,"  as defined in Section 412 of the Code, has been incurred,  whether
or not  waived,  and the fair  market  value of the  assets  of each  such  plan
(excluding  for these  purposes  accrued but unpaid  contributions)  exceeds the
present  value  of  all  benefits  accrued  under  such  plan  determined  using
reasonable actuarial assumptions.

                  (x) The Company has reviewed its  operations  and those of any
third parties with which the Company has a material relationship to evaluate the
extent to which the business or  operations  of the Company have been or will be
affected  by the Year 2000  Problem  (as  defined  herein).  As a result of such
review,  the Company has no reason to believe,  and does not  believe,  that the
Year 2000 Problem will have a Material  Adverse Effect or result in any material
loss or interference with the Company's  business or operations.  The "Year 2000
Problem" as used herein means any  significant  risk that  computer  hardware or
software used in the receipt, transmission,  processing,  manipulation, storage,
retrieval,  retransmission  or other  utilization of data or in the operation of
mechanical or  electrical  systems of any kind will not, in the case of dates or
time periods occurring after December 31, 1999, function at least as effectively
as in the case of dates or time periods occurring prior to January 1, 2000.

                  (y) The  statistical and  market-related  data included in the
Registration  Statement  and the  Prospectus  are derived from sources which the
Company  reasonably  and in good faith  believes to be accurate,  reasonable and
reliable, and such data agree with the sources from which they were derived.

                  (z)  There are no  contracts,  licenses,  agreements  or other
documents which are required to be described in the  Registration  Statement and
the Prospectus or filed as exhibits to the Registration  Statement by the Act or
by the Regulations  which have not been described in the Registration  Statement
and the Prospectus or filed as exhibits to the Registration Statement.

                  (aa) No  relationship,  direct or indirect,  exists between or
among the Company or any of its  affiliates on the one hand,  and the directors,
officers, stockholders, customers or suppliers of the Company on the other hand,
which  is  required  to be  described  in the  Registration  Statement  and  the
Prospectus that is not so described.

                  (bb) The offer and sale by the Company to  Amersham  Pharmacia
Biotech  Inc. in August 2000 of 950,747  shares of Series B Preferred  Stock was
exempt from the registration requirements of the Act, and the offer and issuance
thereof is not required to be integrated with the offer and sale of the Shares.

         2. Purchase, Sale and Delivery of the Shares.

                  (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 the Underwriters and the  Underwriters,
severally  and not jointly,  agree to purchase  from the Company,  at a purchase
price per share of $_____,  the number of Firm  Shares  set forth  opposite  the
respective  names of the  Underwriters  in Schedule I hereto plus any additional
number of Shares  which  such  Underwriter  may  become  obligated  to  purchase
pursuant to the provisions of Section 9 hereof.



                                       8
<PAGE>

                  (b)  Payment  of the  purchase  price  for,  and  delivery  of
certificates  for,  the Firm  Shares  shall be made at the  offices  of  Coudert
Brothers,  1114 Avenue of the Americas,  New York, New York,  10036,  or at such
other place as shall be agreed upon by you and the Company,  at ____ A.M. on the
third or fourth  business day (as permitted under Rule 15c6-1 under the Exchange
Act) (unless  postponed in accordance  with the  provisions of Section 9 hereof)
following the date of the  effectiveness of the  Registration  Statement (or, if
the Company has elected to rely upon Rule 430A of the Regulations,  the third or
fourth  business day (as  permitted  under Rule 15c6-1  under the Exchange  Act)
after the determination of the initial public offering price of the Shares),  or
such  other time not later  than ten  business  days after such date as shall be
agreed upon by you and the Company  (such time and date of payment and  delivery
being herein called the "Closing Date"). Payment shall be made to the Company by
wire transfer of immediately  available  funds,  against delivery to you for the
respective  accounts of the  Underwriters of certificates for the Firm Shares to
be purchased by them.  Certificates  for the Firm Shares shall be  registered in
such name or names and in such  authorized  denominations  as you may request in
writing at least two full business  days prior to the Closing Date.  The Company
will permit you to examine and package such  certificates  for delivery at least
one full  business  day prior to the  Closing  Date.  As used  herein,  the term
"business  day" means any day other than a day on which banks are  permitted  or
required to be closed in New York City.

                  (c) In addition, the Company hereby grants to the Underwriters
the option to  purchase  up to _______  Additional  Shares at the same  purchase
price  per  share to be paid by the  Underwriters  to the  Company  for the Firm
Shares  as set  forth  in this  Section  2,  for the sole  purpose  of  covering
over-allotments in the sale of Firm Shares by the Underwriters.  This option may
be exercised at any time,  in whole or in part,  on or before the  thirtieth day
following the date of the  Prospectus,  by written notice by you to the Company.
Such notice  shall set forth the  aggregate  number of  Additional  Shares as to
which  the  option  is being  exercised  and the date and  time,  as  reasonably
determined by you, when the Additional Shares are to be delivered (such date and
time being  herein  sometimes  referred to as the  "Additional  Closing  Date");
provided,  however,  that the Additional  Closing Date shall not be earlier than
the Closing Date or earlier than the second full  business day after the date on
which the option  shall  have been  exercised  nor later  than the  eighth  full
business  day after  the date on which  the  option  shall  have been  exercised
(unless such time and date are  postponed in accordance  with the  provisions of
Section 9 hereof). Certificates for the Additional Shares shall be registered in
such name or names and in such  authorized  denominations  as you may request in
writing at least two full  business days prior to the  Additional  Closing Date.
The  Company  will  permit you to examine  and  package  such  certificates  for
delivery at least one full business day prior to the Additional Closing Date.

                  (d)  The  number  of  Additional  Shares  to be  sold  to each
Underwriter  shall be the number  which  bears the same  ratio to the  aggregate
number of  Additional  Shares  being  purchased as the number of Firm Shares set
forth opposite the name of such Underwriter in Schedule I hereto (or such number
increased  as set forth in Section 9 hereof)  bears to the total  number of Firm
Shares being purchased from the Company,  subject,  however, to such adjustments
to eliminate any fractional shares as you in your sole discretion shall make.

                  (e) Payment of the purchase  price for the  Additional  Shares
shall be made by wire transfer of immediately  available funds at the offices of
Coudert  Brothers,  1114 Avenue of the


                                       9
<PAGE>

Americas, New York, New York, 10036, or such other place as shall be agreed upon
by you and the Company,  upon delivery of the  certificates  for the  Additional
Shares to you for the respective accounts of the Underwriters.

         3. Offering.

                  (a) Upon your authorization of the release of the Firm Shares,
the  Underwriters  propose to offer the  Shares for sale to the public  upon the
terms set forth in the Prospectus.

                  (b) The Company and the  Underwriters  hereby agree that up to
five percent (5%) of the Firm Shares to be  purchased by the  Underwriters  (the
"Directed  Shares")  shall be reserved for sale by the  Underwriters  to certain
eligible  employees  of, and certain  persons  designated  by, the Company  (the
"Directed  Shares  Purchasers") as part of the distribution of the Shares by the
Underwriters,  subject to the terms of this  Agreement,  the  applicable  rules,
regulations  and  interpretations  of the  National  Association  of  Securities
Dealers,  Inc. and all other applicable  laws, rules and regulations,  provided,
however,  that under no circumstances will Bear, Stearns & Co. Inc. or any other
Underwriter be liable to the Company or to any of the Directed Shares Purchasers
for any action taken or omitted in good faith in  connection  with  transactions
effected with regard to the Directed Shares Purchasers.  To the extent that such
Directed Shares are not orally confirmed for purchase by such persons by the end
of the first day after the date of this Agreement,  such Directed Shares will be
offered to the public as part of the offering contemplated hereby.

         4. Covenants of the Company.  The Company covenants and agrees with the
Underwriters that:

                  (a) If the  Registration  Statement  has not yet been declared
effective  the  Company  will use its best  efforts  to cause  the  Registration
Statement  and any  amendments  thereto  to  become  effective  as  promptly  as
possible,  and if Rule 430A is used or the filing of the Prospectus is otherwise
required  under Rule 424(b) or Rule 434,  the Company  will file the  Prospectus
(properly  completed if Rule 430A has been used) pursuant to Rule 424(b) or Rule
434 within the prescribed time period and will provide evidence  satisfactory to
you of such  timely  filing.  If the  Company  elects to rely on Rule  434,  the
Company will prepare and file a term sheet that complies  with the  requirements
of Rule 434.

         The Company will notify you immediately (and, if requested by you, will
confirm  such notice in writing)  (i) when the  Registration  Statement  and any
amendments  thereto become effective,  (ii) of any request by the Commission for
any amendment of or supplement to the  Registration  Statement or the Prospectus
or for any additional  information,  (iii) of the mailing or the delivery to the
Commission  for filing of any  amendment of or  supplement  to the  Registration
Statement or the Prospectus,  (iv) of the issuance by the Commission of any stop
order  suspending  the  effectiveness  of  the  Registration  Statement  or  any
post-effective  amendment thereto or of the initiation,  or the threatening,  of
any  proceedings  therefor  and (v) of the  receipt  of any  comments  from  the
Commission.  If the Commission  shall propose or enter a stop order at any time,
the Company  will make every  reasonable  effort to prevent the  issuance of any
such stop order and,  if issued,  to obtain the lifting of such order as soon as
possible. The Company will not file any amendment to the Registration Statement,
make any filing under Rule 462(b) of


                                       10
<PAGE>

the  Regulations  or file  any  amendment  of or  supplement  to the  Prospectus
(including the  prospectus  required to be filed pursuant to Rule 424(b) or Rule
434) that differs from the  prospectus on file at the time of the  effectiveness
of the  Registration  Statement  before  or  after  the  effective  date  of the
Registration  Statement to which you shall  reasonably  object in writing  after
being timely furnished in advance a copy thereof.

                  (b) The Company  will comply with the Act and the  Regulations
so as to permit the completion of the distribution of the Shares as contemplated
in this Agreement and the Prospectus.  If at any time when a prospectus relating
to the Shares is  required  to be  delivered  under the Act any event shall have
occurred as a result of which the  Prospectus  as then  amended or  supplemented
would,  in the judgment of the  Underwriters  or the Company,  include an 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 the light of the
circumstances  under  which they were made,  not  misleading,  or if it shall be
necessary at any time to amend or  supplement  the  Prospectus  or  Registration
Statement to comply with the Act or the Regulations, the Company will notify you
promptly and prepare and file with the  Commission an  appropriate  amendment or
supplement  (in form and substance  reasonably  satisfactory  to you) which will
correct  such  statement  or omission  and will use its best efforts to have any
amendment to the Registration Statement declared effective as soon as possible.

                  (c) The Company will promptly  deliver to you a signed copy of
the  Registration  Statement,  as initially filed with the  Commission,  and all
amendments thereto (including exhibits) and will maintain in the Company's files
manually  signed copies of such  documents for at least five years from the date
of filing.  The Company will promptly deliver to each of the  Underwriters  such
number of copies of any preliminary prospectus, the Prospectus, the Registration
Statement,  and all amendments of and supplements to such documents,  if any, as
you may reasonably  request,  and the Company hereby consents to the use of such
copies for purposes permitted by the Act.

                  (d) The Company will  endeavor in good faith,  in  cooperation
with  you,  at or  prior  to the  time  of  effectiveness  of  the  Registration
Statement, to qualify the Shares for offering and sale under the securities laws
relating to the offering or sale of the Shares of such  jurisdictions as you may
designate and to maintain such  qualification  in effect for so long as required
for the  distribution  thereof;  except  that in no event  shall the  Company be
obligated  in  connection  therewith to qualify as a foreign  corporation  or to
execute a general  consent to service of  process.  The  Company  will  promptly
advise you of the receipt by the  Company of any  notification  with  respect to
suspension of the  qualification  of the Shares for sale in any  jurisdiction or
the  initiation or  threatening  of any proceeding for such purpose and will use
every  reasonable  effort to obtain the withdrawal of any order of suspension as
soon as possible.

                  (e) The  Company  will make  generally  available  (within the
meaning of Section 11(a) of the Act) to its security  holders and to you as soon
as  practicable,  but not later than 45 days after the end of its fiscal quarter
in which the first  anniversary  date of the effective date of the  Registration
Statement occurs, an earning statement (in form complying with the provisions of
Rule 158 of the  Regulations)  covering a period of at least twelve  consecutive
months beginning after the effective date of the Registration Statement.



                                       11
<PAGE>

                  (f)  During  the  period  of 180  days  from  the  date of the
Prospectus, (i) the Company will not, without the prior written consent of Bear,
Stearns & Co. Inc. on behalf of the Underwriters, directly or indirectly, issue,
sell,  offer or agree to sell,  grant  any  option,  warrant  or other  right to
purchase  or  otherwise  sell or  dispose  of (or  announce  any  offer of sale,
contract of sale, sale, grant of any option,  warrant or other right to purchase
or other sale or disposition  of),  pledge,  make any short sale or maintain any
short position,  establish or maintain a "put equivalent  position"  (within the
meaning  of Rule  16-a-1(h)  under  the  Exchange  Act),  enter  into any  swap,
derivative  transaction or other arrangement that transfers to another, in whole
or in part,  any of the economic  consequences  of ownership of the Common Stock
(whether  any such  transaction  is to be settled by delivery  of Common  Stock,
other  securities,  cash or other  consideration)  or otherwise  dispose of, any
Common  Stock  (or  any  securities   convertible   into,   exercisable  for  or
exchangeable  for Common Stock) or interest  therein of the Company,  other than
(A) the grant of options  under,  or the  issuance  by the  Company of shares of
Common Stock pursuant to the exercise of options  outstanding  under, its Equity
Incentive  Compensation  Plan as in effect on the date hereof (provided that the
Company  shall only so grant  options or so issue shares during such 180 days to
officers,  directors and others who  beneficially  own at least 10,000 shares of
Common Stock and/or options or warrants to purchase  shares of Common Stock,  in
each case  inclusive  of such grant or  issuance,  if such person  agrees not to
engage in any of the aforementioned  transactions prior to the expiration of the
period of 180 days from the date of the Prospectus),  (B) the issuance of shares
of  Common  Stock  pursuant  to  the  automatic   conversion  of  the  Company's
outstanding  Series A and  Series B  convertible  preferred  stock,  and (C) the
issuance of shares of Common Stock or securities  convertible  into Common Stock
in connection with any acquisition of, or strategic  relationship  with, another
company if (x) the terms of such issuance  provide that such other company shall
not engage in any of the aforementioned  transactions prior to the expiration of
the period of 180 days following the date of the Prospectus and (y) the value of
the  total   consideration  to  be  paid  for  such  acquisitions  or  strategic
relationships   does  not  exceed  $20  million   with  respect  to  any  single
transaction,  or $50 million  with respect to all  transactions,  during the 180
days following the date of the Prospectus,  and (ii) the Company will obtain the
undertaking  of each of its officers and directors  and all of its  stockholders
having  beneficial  ownership  of or having  options or  warrants to purchase at
least  10,000  shares  of  Common  Stock of the  Company,  as of the time of the
closing of the sale of the Firm Shares  hereunder  on the Closing  Date,  not to
engage in any of the aforementioned transactions on their own behalf, other than
the Company's sale of Shares hereunder.

                  (g)  During  a  period  of  three  years  from the date of the
Prospectus,  the Company will furnish to you and, upon  request,  to each of the
other  Underwriters (i) copies of any reports or other  communications  that the
Company  shall send to its  stockholders  or shall from time to time  publish or
publicly disseminate,  and (ii) copies of all reports,  financial statements and
proxy or information  statements filed by the Company with the Commission or any
national securities exchange or automated quotation system.

                  (h) The Company will apply the  proceeds  from the sale of the
Shares as set forth under "Use of Proceeds" in the Prospectus.

                  (i) The Company  will use its best efforts to cause the Shares
to be included in the  National  Association  of  Securities  Dealers  Automated
Quotation  National  Market System and to maintain such quotation so long as any
of the Shares are outstanding.



                                       12
<PAGE>

                  (j) The Company will file with the  Commission in its periodic
reports pursuant to Section 13 or 15 of the Exchange Act such information as may
be required pursuant to Rule 463 of the Regulations.

                  (k) The  Company,  during the period  when the  Prospectus  is
required  to be  delivered  under  the Act or the  Exchange  Act,  will file all
documents required to be filed with the Commission pursuant to Section 13, 14 or
15 of the Exchange Act within the time periods  required by the Exchange Act and
the rules and regulations thereunder.

                  (l) The  Company  hereby  agrees  that it will ensure that the
Directed  Shares are  restricted  as required  by the  National  Association  of
Securities  Dealers,  Inc.  rules from  sale,  transfer,  assignment,  pledge or
hypothecation for a period of three months following the date of this Agreement.
The Underwriters  will notify the Company as to which persons will need to be so
restricted.  At the request of the  Underwriters,  the  Company  will direct the
transfer  agent to place a stop transfer  restriction  upon such  securities for
such a period of time. Should the Company release, or seek to release, from such
restrictions  any of the Directed  Shares,  the Company  agrees to reimburse the
Underwriters for any reasonable  expenses  (including  without  limitation legal
expenses) they incur in connection with such release.

                  (m) The  Company  will use its best  efforts to do and perform
all things  required or necessary to be done and performed  under this Agreement
by the Company  prior to or after the  Closing  Date or any  Additional  Closing
Date,  as the  case may be,  and to  satisfy  all  conditions  precedent  to the
delivery of the Shares.



                                       13
<PAGE>

         5. Payment of Expenses. Whether or not the transactions contemplated in
this Agreement are  consummated  or this  Agreement is  terminated,  the Company
hereby agrees to pay all costs and expenses  incident to the  performance of the
obligations of the Company  hereunder,  including  those in connection  with (i)
preparing,  printing,  duplicating,  filing and  distributing  the  Registration
Statement,  as  originally  filed  and all  amendments  thereof  (including  all
exhibits thereto), any preliminary prospectus, the Prospectus and any amendments
or supplements thereto (including,  without limitation, fees and expenses of the
Company's accountants and counsel),  the underwriting  documents (including this
Agreement,  the Master  Agreement  Among  Underwriters  and the  Master  Selling
Agreement) and all other documents  related to the public offering of the Shares
(including  those  supplied to the  Underwriters  in quantities  as  hereinabove
stated),  (ii)  the  issuance,  transfer  and  delivery  of  the  Shares  to the
Underwriters,  including any transfer or other taxes payable thereon,  (iii) the
qualification  of the Shares under state or foreign  securities or Blue Sky laws
or  regulations,  including the costs of printing and mailing a preliminary  and
final "Blue Sky Survey"  and the fees of counsel for the  Underwriters  and such
counsel's disbursements in relation thereto, (iv) quotation of the Shares on the
National  Association of Securities Dealers Automated  Quotation National Market
System,  (v) filing  fees of the  Commission  and the  National  Association  of
Securities Dealers,  Inc., (vi) the cost of printing  certificates  representing
the Shares,  (vii) the cost and charges of any transfer  agent or registrar  for
the Shares and (viii) all costs and expenses of the Underwriters,  including the
fees and  disbursements  of counsel for the  Underwriters,  in  connection  with
matters  related to the Directed  Shares which are designated by the Company for
sale to Directed Share Purchasers.

         6.  Conditions of  Underwriters'  Obligations.  The  obligations of the
Underwriters to purchase and pay for the Firm Shares and the Additional  Shares,
as provided herein,  shall be subject to the accuracy of the representations and
warranties of the Company herein contained,  as of the date hereof and as of the
Closing Date (for  purposes of this Section 6 "Closing  Date" shall refer to the
Closing Date for the Firm Shares and any Additional  Closing Date, if different,
for the  Additional  Shares),  to the absence from any  certificates,  opinions,
written   statements  or  letters  furnished  to  you  or  to  Coudert  Brothers
("Underwriters'  Counsel")  pursuant to this  Section 6 of any  misstatement  or
omission, to the performance by the Company of its obligations hereunder, and to
the following additional conditions:

                  (a) The  Registration  Statement,  including  any Rule  462(b)
Registration Statement,  shall have become effective and all necessary approvals
of the National  Association of Securities Dealers Automated  Quotation National
Market System shall have been received,  not later than, if pricing  pursuant to
Rule 430A, 5:30 P.M., New York time, on the date of this  Agreement,  if pricing
pursuant  to a pricing  amendment,  12:00  Noon,  New York time,  on the date an
amendment to the Registration Statement containing the public offering price has
been  filed  with the  Commission,  or at such later time and date as shall have
been  consented to in writing by you; if the Company  shall have elected to rely
upon Rule 430A or Rule 434 of the  Regulations,  the Prospectus  shall have been
filed with the  Commission in a timely  fashion in accordance  with Section 4(a)
hereof;  and,  at or prior to the Closing  Date,  no stop order  suspending  the
effectiveness  of the  Registration  Statement or any  post-effective  amendment
thereof  shall have been  issued  and no  proceedings  therefor  shall have been
initiated or threatened by the Commission.



                                       14
<PAGE>

                  (b) At the Closing Date you shall have received the opinion of
Hogan & Hartson  LLP,  counsel for the  Company,  dated the date of such Closing
Date addressed to the  Underwriters  and in form and substance  satisfactory  to
Underwriters' Counsel, to the effect that:

                  (i)      The Company was incorporated, and is validly existing
         and in good standing as of the date (not more than three  business days
         prior  to the  Closing  Date)  of the  applicable  certificate  of good
         standing  specified  in such  opinion,  under  the laws of the State of
         Delaware.  The Company has the corporate power and corporate  authority
         under  its  Certificate  of  Incorporation  and  the  Delaware  General
         Corporation Law to own, lease and operate its current properties and to
         conduct its business as described in the Registration Statement and the
         Prospectus. The Company is authorized to transact business as a foreign
         corporation in  ___________  as of the respective  dates (not more than
         five days prior to the Closing Date) of the  certificates  specified in
         such opinion.

                  (ii)     All shares of capital  stock of the Company  shown as
         issued  and   outstanding   on  an  actual   basis  under  the  caption
         "Capitalization"  in the Prospectus are duly authorized  and,  assuming
         the receipt of consideration therefor as provided in resolutions of the
         Company's Board of Directors  authorizing issuance thereof, are validly
         issued, fully paid and nonassessable,  and were not issued in violation
         of  any  statutory   preemptive   rights  under  the  Delaware  General
         Corporation Law or, to such counsel's knowledge,  any contractual right
         to  subscribe  for such  shares.  The  capital  stock  conforms  in all
         material  respects  to  the  description   thereof  set  forth  in  the
         Prospectus under the caption "Description of Capital Stock".

                  (iii)    To such  counsel's  knowledge,  the  Company  has not
         issued any outstanding securities convertible into or exchangeable for,
         or  outstanding  options,  warrants  or other  rights  to  purchase  or
         subscribe for, any shares of stock or other  securities of the Company,
         except as described in the Registration Statement and the Prospectus.

                  (iv)     The Company  has the  corporate  power and  corporate
         authority  under  the  Company  Certificate  of  Incorporation  and the
         Delaware  General  Corporation Law to execute,  deliver and perform its
         obligations  under the  Agreement and to  consummate  the  transactions
         contemplated  by this  Agreement,  including,  without  limitation,  to
         issue, sell and deliver the Shares as provided therein. When issued and
         paid for in accordance with the provisions of the Agreement, the Shares
         will be validly issued, fully paid and nonassessable, and will not have
         been issued in violation of any statutory  preemptive  rights under the
         Delaware General Corporation Law or, to such counsel's  knowledge,  any
         contractual rights to subscribe to the Shares.

                  (v)      This Agreement has been duly and validly  authorized,
         executed and delivered on behalf of the Company.

                  (vi)     The Registration Statement has become effective under
         the Act, the required filings of the Prospectus pursuant to Rule 424(a)
         and Rule 424(b)  promulgated  pursuant to the Act have been made in the
         manner and  within the time  period  required  by Rule  424(a) and Rule
         424(b) and, to such counsel's  knowledge,  no stop order suspending


                                       15
<PAGE>

         the  effectiveness  of the  Registration  Statement  or  suspending  or
         preventing the use of the Prospectus has been issued and no proceedings
         for  that  purpose  have  been  instituted  or  are  threatened  by the
         Commission.

                  (vii)    The Registration Statement and the Prospectus (except
         for the financial statements and supporting schedules included therein,
         as to which such  counsel  need not express any  opinion)  comply as to
         form in all material  respects with the requirements of the Act and the
         applicable rules and regulations thereunder.

                  (viii)   The  execution,   delivery  and  performance  by  the
         Company of this  Agreement and the  consummation  by the Company of the
         transactions therein  contemplated  (including the issuance and sale of
         the Shares) do not and will not (i) violate the  Company's  Certificate
         of Incorporation or the Company's  Bylaws,  (ii) breach or constitute a
         default  (or an event  which with notice or lapse of time or both would
         constitute  a default)  under any  agreement  or  contract  filed as an
         exhibit  to  the  Registration  Statement,   (iii)  to  such  counsel's
         knowledge, violate any applicable law, or any order, judgment or decree
         applicable to the Company or its properties or assets,  or (iv) to such
         counsel's knowledge,  result in the imposition of a lien or encumbrance
         on any property or assets of the Company,  except for such  violations,
         breaches,  defaults or impositions  referred to in clauses (ii),  (iii)
         and (iv) of this Paragraph  (viii) that (X) would not, singly or in the
         aggregate,  have a Material  Adverse Effect or (Y) are disclosed in the
         Prospectus.

                  (ix)     No approval or consent of, or  registration or filing
         with  governmental  agency,   court,  or  regulatory  authority  having
         jurisdiction  over the Company or its assets is required to be obtained
         or made by the Company in connection  with the execution,  delivery and
         performance  (including  the  issuance  and sale of the  Shares) by the
         Company  of the  Agreement,  except (i) such as may be  required  under
         state securities or blue sky statutes and regulations (as to which such
         counsel  need  not  express  any  opinion)  or (ii)  such as have  been
         obtained or made.

                  (x)      The  Company  is not,  and upon  consummation  of the
         transactions  contemplated  hereby and the  application of the proceeds
         therefrom as described in the Registration Statement and the Prospectus
         will not be, an  "investment  company,"  as such term is defined in the
         Investment Company Act of 1940, as amended.

                  (xi)     To such counsel's knowledge,  there are no holders of
         any securities of the Company who, by reason of the execution, delivery
         or  performance  by the  Company  of the  Agreement,  have the right to
         request or require that the Company  register  under the Securities Act
         securities held by them.

                  (xii)    The information in the Registration Statement and the
         Prospectus  under  the  following  captions,  to the  extent  that such
         information  constitutes  matters  of  law  or  legal  conclusions,  or
         purports to describe  certain  provisions of specified  documents,  has
         been reviewed by such counsel, and is correct in all material respects:
         "Description of Capital Stock" and "Shares Eligible for Future Sale".



                                       16
<PAGE>

                  (xiii)   The Shares have been  authorized for quotation in the
         National  Association of Securities Dealers Automated  Quotation System
         National Market System.

                  (xiv)    The  offer  and  sale  by  the  Company  to  Amersham
         Pharmacia  Biotech  Inc. in August  2000 of 950,747  shares of Series B
         Preferred  Stock was exempt from the  registration  requirements of the
         Act,  and  the  offer  and  issuance  thereof  is  not  required  to be
         integrated with the offer and sale of the Shares.

         In addition,  such opinion also shall contain a statement to the effect
that during the course of the preparation of the Registration  Statement and the
Prospectus,  such counsel  participated  in conferences  with officers and other
representatives  of  the  Company,   with  representatives  of  the  independent
certified public accountants of the Company and with the underwriters,  and that
on the basis of these  conferences  and such counsel's  activities as counsel to
the Company in connection with the Registration Statement and the Prospectus, no
facts have come to such counsel's  attention which cause it to believe that: (i)
the Registration  Statement,  at the time it became effective,  or any amendment
thereof  made  prior  to the  Closing  Date as of the  date  of such  amendment,
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
not misleading,  or that the Prospectus (and any amendment thereof or supplement
thereto  made prior to the Closing  Date),  as of the date  hereof,  contains an
untrue  statement of a material  fact or omits to state a material fact required
to be stated  therein or necessary in order to make the statements  therein,  in
light of the  circumstances  under which they were made,  not  misleading,  (ii)
there are any legal or governmental  proceedings  pending or threatened  against
the Company that are required to be disclosed in the  Registration  Statement or
the  Prospectus,  other than those  disclosed  therein,  or (iii)  there are any
contracts,  or  documents  of a  character  required  to  be  described  in  the
Registration  Statement  or the  Prospectus  or to be filed as  exhibits  to the
Registration  Statement  that are not  described  or  referred  to therein or so
filed;  provided  that in  making  the  foregoing  statements  (which  shall not
constitute  an  opinion),  such  counsel  need not  express  any views as to the
financial  statements and supporting  schedules and other financial  information
and  data  derived  therefrom  included  in or  omitted  from  the  Registration
Statement or the Prospectus.

         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  reasonably  satisfactory  to  Underwriters'
Counsel)  of other  counsel  reasonably  acceptable  to  Underwriters'  Counsel,
familiar with the applicable laws; (B) as to matters of fact, to the extent they
deem  proper,  on  certificates  of  responsible  officers  of the  Company  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 the Company,  provided  that copies of any such  statements or
certificates  shall be delivered to Underwriters'  Counsel.  The opinion of such
counsel for the Company  shall state that the opinion of any such other  counsel
is in form satisfactory to such counsel and, in their opinion,  you and they are
justified in relying thereon.

                  (c) At the Closing  Date,  you shall have received the opinion
of Roberts  Abokhair & Mardula,  LLC, patent counsel for the Company,  dated the
Closing Date addressed to the  Underwriters  and in the form  previously  agreed
with the Underwriters' Counsel.



                                       17
<PAGE>

                  (d) All  proceedings  taken in connection with the sale of the
Firm  Shares  and  the  Additional  Shares  as  herein   contemplated  shall  be
satisfactory in form and substance to you and to Underwriters'  Counsel, and the
Underwriters  shall have  received from said  Underwriters'  Counsel a favorable
opinion,  dated as of the Closing  Date with respect to the issuance and sale of
the Shares, the Registration Statement and the Prospectus and such other related
matters as you may reasonably  require,  and the Company shall have furnished to
Underwriters'  Counsel  such  documents as they may  reasonably  request for the
purpose of enabling them to pass upon such matters.

                  (e) At the Closing Date you shall have  received a certificate
of the Chief Executive Officer and Chief Financial Officer of the Company, dated
the Closing  Date,  to the effect that (i) the condition set forth in subsection
(a) of this Section 6 has been  satisfied,  (ii) as of the date hereof and as of
the Closing Date the  representations and warranties of the Company set forth in
Section  1 hereof  are  true  and  correct,  (iii)  as of the  Closing  Date the
obligations  of the Company to be performed  hereunder on or prior  thereto have
been duly  performed  and (iv)  subsequent to the  respective  dates as of which
information  is given in the  Registration  Statement  and the  Prospectus,  the
Company  has not  sustained  any  loss or  interference  with  its  business  or
properties from fire, flood, hurricane,  accident or other calamity,  whether or
not covered by insurance, or from any labor dispute or any legal or governmental
proceeding,  and  there  has  not  been  any  Material  Adverse  Change,  or any
development  involving  a  Material  Adverse  Effect,  except  in  each  case as
described in or contemplated by the Prospectus.

                  (f) At the time this  Agreement is executed and at the Closing
Date,  you shall have received a letter from Deloitte & Touche LLP,  independent
public accountants for the Company, dated, respectively,  as of the date of this
Agreement and as of the Closing Date addressed to the  Underwriters  and in form
and  substance  satisfactory  to you,  stating  that:  (i) they are  independent
certified  public  accountants with respect to the Company within the meaning of
the Act and the Regulations; (ii) in their opinion, the financial statements and
schedules  of  the  Company  included  in the  Registration  Statement  and  the
Prospectus  and  covered  by  their  opinion  therein  comply  as to form in all
material respects with the applicable accounting requirements of the Act and the
applicable published rules and regulations of the Commission  thereunder;  (iii)
on the basis of  procedures  consisting  of a reading  of the  latest  available
unaudited  interim  financial  statements  of the  Company  and  of  the  latest
available  unaudited monthly financial  statements of the Company (which, in the
case of the  letter  delivered  on the  Closing  Date,  shall  be at least as of
______,  2000),  a reading  of the  minutes  of  meetings  and  consents  of the
stockholders  and board of directors of the Company and the  committees  of such
board subsequent to December 31, 1999, inquiries of officers and other employees
of the Company who have  responsibility  for financial and accounting matters of
the Company with respect to transactions  and events  subsequent to December 31,
1999 and other  specified  procedures and inquiries to a date not more than five
days prior to the date of such letter (provided that the letter delivered on the
Closing  Date shall use a  "cut-off"  date not  earlier  than the date  hereof),
nothing has come to their  attention  that would cause them to believe that: (A)
the unaudited financial statements and schedules of the Company presented in the
Registration  Statement  and  the  Prospectus  do not  comply  as to form in all
material respects with the applicable accounting requirements of the Act and the
applicable published rules and regulations of the Commission  thereunder or that
such  unaudited  financial  statements  are  not in  conformity  with  generally
accepted accounting principles applied on a basis substantially  consistent with
that of the audited financial statements


                                       18
<PAGE>

included in the Registration  Statement and the Prospectus;  (B) with respect to
the period  subsequent  to June 30, 2000 there were,  as of the date of the most
recent available monthly financial  statements of the Company, if any, and as of
a  specified  date not more  than  five  days  prior to the date of such  letter
(provided  that the letter  delivered  on the Closing Date shall use a "cut-off"
date not earlier  than the date  hereof),  any  changes in the capital  stock or
long-term  indebtedness  of the Company or any decrease in the current assets or
increase in shareholders'  deficit of the Company, in each case as compared with
the amounts shown in the most recent balance sheet presented in the Registration
Statement  and the  Prospectus,  except  for  changes  or  decreases  which  the
Registration Statement and the Prospectus disclose have occurred or may occur or
which are set forth in such  letter;  or (C) that during the period from July 1,
2000 to the date of the most recent available  monthly  financial  statements of
the Company,  if any,  and to a specified  date not more than five days prior to
the date of such letter  (provided that the letter delivered on the Closing Date
shall use a "cut-off"  date not  earlier  than the date  hereof),  there was any
decrease, as compared with the corresponding period in the prior fiscal year, in
revenues,  or increase in net loss,  except for decreases or  increases,  as the
case may be, which the Registration  Statement and the Prospectus  disclose have
occurred or may occur or which are set forth in such  letter;  and (iv)  stating
that they have compared specific dollar amounts, numbers of shares,  percentages
of revenues and  earnings,  and other  financial  information  pertaining to the
Company set forth in the Registration  Statement and the Prospectus,  which have
been  specified by you prior to the date of this  Agreement,  to the extent that
such amounts,  numbers,  percentages,  and  information  may be derived from the
general  accounting  and  financial  records of the  Company  or from  schedules
furnished  by  the  Company,   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 specified by
you set forth in such letter, and found them to be in agreement.

                  (g) Prior to the Closing Date the Company shall have furnished
to  you  such  further  information,  certificates  and  documents  as  you  may
reasonably request.

                  (h) You shall have received from each person who is a director
or officer of the Company or stockholder  beneficially  owning or having options
or warrants to purchase at least  10,000  shares of Common Stock of the Company,
as of the time of the  closing of the sale of the Firm Shares  hereunder  at the
Closing Date, an agreement to the effect that such person will not,  directly or
indirectly,  without the prior  written  consent of Bear,  Stearns & Co. Inc. on
behalf of the  Underwriters,  during  the period  commencing  on the date of the
Prospectus and ending 180 days  thereafter,  (1) issue,  sell, offer or agree to
sell, grant any option for the sale of, pledge,  make any short sale or maintain
any short position,  establish or maintain a "put equivalent  position"  (within
the meaning of Rule  16-a-1(h)  under the  Exchange  Act),  enter into any swap,
derivative  transaction or other arrangement that transfers to another, in whole
or in part,  any of the  economic  consequences  of  ownership  of Common  Stock
(whether any such  transaction  is to be settled by delivery of shares of Common
Stock,  other securities,  cash or other  consideration) or otherwise dispose of
any  Common  Stock  (or any  securities  convertible  into,  exercisable  for or
exchangeable  for Common  Stock) or interest  therein of the Company or (2) make
any demand  for,  or exercise  his,  her or its  rights,  if any, to require the
Company to register its Common Stock and to receive notice thereof.



                                       19
<PAGE>

                  (i) At the Closing Date,  the Shares shall have been quoted on
the National  Association of Securities  Dealers  Automated  Quotation  National
Market System.

         If any of the  conditions  specified  in this  Section 6 shall not have
been  fulfilled  when  and  as  required  by  this  Agreement,  or if any of the
certificates,  opinions,  written  statements or letters  furnished to you or to
Underwriters'  Counsel  pursuant to this  Section 6 shall not be in all material
respects   reasonably   satisfactory  in  form  and  substance  to  you  and  to
Underwriters'  Counsel,  all  obligations of the  Underwriters  hereunder may be
cancelled  by you  at,  or at any  time  prior  to,  the  Closing  Date  and the
obligations  of the  Underwriters  to  purchase  the  Additional  Shares  may be
cancelled  by you at, or at any time  prior to,  the  Additional  Closing  Date.
Notice of such  cancellation  shall be given to the  Company in  writing,  or by
telephone, facsimile, telex or telegraph, confirmed in writing.

         7. Indemnification.

                  (a) The Company  agrees to indemnify  and hold  harmless  each
Underwriter  and each person,  if any, who controls any  Underwriter  within the
meaning of Section 15 of the Act or Section 20(a) of the Exchange  Act,  against
any and all losses,  liabilities,  claims,  damages and expenses  whatsoever  as
incurred  (including but not limited to attorneys' fees and any and all expenses
whatsoever  incurred  in  investigating,  preparing  or  defending  against  any
litigation,  commenced or threatened,  or any claim whatsoever,  and any and all
amounts paid in settlement  of any claim or  litigation),  joint or several,  to
which they or any of them may become  subject under the Act, the Exchange Act or
otherwise, insofar as such losses, liabilities,  claims, damages or expenses (or
actions  in  respect  thereof)  arise  out of or are based  upon (i) any  untrue
statement  or alleged  untrue  statement  of a material  fact  contained  in the
registration  statement for the registration of the Shares, as originally filed,
or  any  amendment  thereof,  or  any  related  preliminary  prospectus  or  the
Prospectus,  or in any supplement thereto or amendment thereof,  or the omission
or alleged  omission  to state  therein a material  fact  required  to be stated
therein or necessary to make the statements therein not misleading;  or (ii) (A)
the violation by the Company of any  applicable  laws or  regulations of foreign
jurisdictions  where  Directed  Shares  have  been  offered  and (B) any  untrue
statement  or alleged  untrue  statement  of a  material  fact  included  in the
supplement or prospectus  wrapper  material  distributed in connection  with the
reservation and sale of the Directed Shares to Directed Share  Purchasers or the
omission or alleged omission  therefrom of a material fact necessary to make the
statements  therein,  when  considered  in  conjunction  with the  Prospectus or
preliminary prospectus, not misleading; provided, however, that the Company will
not be liable in any such case to the  extent  but only to the  extent  that any
such loss,  liability,  claim,  damage or expense arises out of or is based upon
any such untrue  statement  or alleged  untrue  statement or omission or alleged
omission  made  therein  in  reliance  upon  and  in  conformity   with  written
information  furnished to the Company by or on behalf of any Underwriter through
you  expressly  for use  therein;  and  provided  further,  that this  indemnity
agreement  with  respect to any  preliminary  prospectus  shall not inure to the
benefit of any  Underwriter  from whom the  person  asserting  any such  losses,
liabilities,  claims,  damages  or  expenses  purchased  Shares,  or any  person
controlling such Underwriter,  if a copy of the Prospectus was not sent or given
by or on behalf of such Underwriter to such person,  if such is required by law,
at or prior to the  written  confirmation  of the  sale of such  Shares  to such
person and if the Prospectus would have corrected the defect giving rise to such
loss, liability, claim,


                                       20
<PAGE>

damage or expense. This indemnity agreement will be in addition to any liability
which the Company may otherwise have including under this Agreement.

                  (b) Each  Underwriter  severally,  and not jointly,  agrees to
indemnify and hold  harmless the Company,  each of the directors of the Company,
each of the  officers  of the  Company  who shall have  signed the  Registration
Statement,  and each other person,  if any, who controls the Company  within the
meaning of Section 15 of the Act or Section 20(a) of the Exchange  Act,  against
any losses,  liabilities,  claims,  damages and expenses  whatsoever as incurred
(including  but not  limited  to  attorneys'  fees  and  any  and  all  expenses
whatsoever  incurred  in  investigating,  preparing  or  defending  against  any
litigation,  commenced or threatened,  or any claim whatsoever,  and any and all
amounts paid in settlement  of any claim or  litigation),  joint or several,  to
which they or any of them may become  subject under the Act, the Exchange Act or
otherwise, insofar as such losses, liabilities,  claims, damages or expenses (or
actions in respect  thereof) arise out of or are based upon any untrue statement
or alleged  untrue  statement of a material fact  contained in the  registration
statement for the registration of the Shares,  as originally filed, or any filed
amendment thereof, or any related preliminary  prospectus or the Prospectus,  or
any amendment thereof or supplement  thereto,  or arise out of or are based upon
the omission or alleged omission to state therein a material fact required to be
stated therein or necessary to make the statements  therein not  misleading,  in
each case to the extent, but only to the extent, that any such loss,  liability,
claim,  damage  or  expense  arises  out of or is based  upon  any  such  untrue
statement  or alleged  untrue  statement  or omission or alleged  omission  made
therein in reliance upon and in conformity with written information furnished to
the Company by or on behalf of any  Underwriter  through you  expressly  for use
therein;  provided,  however, that in no case shall any Underwriter be liable or
responsible for any amount in excess of the underwriting discount and commission
applicable to the Shares purchased by such Underwriter hereunder. This indemnity
will be in addition to any liability  which any  Underwriter  may otherwise have
including under this Agreement. The Company acknowledges that the statements set
forth in the last  paragraph  of the cover  page and in the  third,  thirteenth,
fourteenth and fifteenth  paragraphs and the list of Underwriters and the number
of shares listed  opposite their  respective  names in the first paragraph under
the caption  "Underwriters"  in the Prospectus  constitute the only  information
furnished in writing by or on behalf of any Underwriter expressly for use in the
registration  statement for the registration of the Shares, as originally filed,
or any filed amendment  thereof,  or any related  preliminary  prospectus or the
Prospectus, or any amendment thereof or supplement thereto, as the case may be.

                  (c) In  connection  with the  offer  and sale of the  Directed
Shares, the Company agrees, promptly upon a request in writing, to indemnify and
hold harmless the Underwriters from and against any and all losses, liabilities,
claims,  damages and  expenses  incurred by it as a result of (i) the failure of
the Directed  Shares  Purchasers to pay for and accept  delivery of the Directed
Shares which, by the end of the day following the date of this  Agreement,  were
subject to a properly  confirmed  agreement to purchase such Directed  Shares or
(ii) the refusal of any Directed  Shares  Purchasers  that are also employees of
the Company  properly to confirm  their  respective  agreements  to purchase the
Directed  Shares  that they had agreed to  purchase  by the end of the first day
after the date of this Agreement.

                  (d)  Promptly  after  receipt by an  indemnified  party  under
subsection  (a), (b) or (c) above of notice of the  commencement  of any action,
such  indemnified  party  shall,  if a claim in


                                       21
<PAGE>

respect  thereof  is to be  made  against  the  indemnifying  party  under  such
subsection,  notify each party against whom  indemnification  is to 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).  In case  any  such  action  is  brought  against  any
indemnified  party,  and it notifies an indemnifying  party of the  commencement
thereof,  the indemnifying party 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  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 one of the  indemnifying  parties in  connection  with the defense of
such action,  (ii) the  indemnifying  parties shall not have employed counsel to
have charge of the defense of such action within a reasonable  time after notice
of commencement of the action,  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 of such action on behalf of the indemnified party or
parties),  in any of which events such fees and  expenses  shall be borne by the
indemnifying   parties.   Anything   in   this   subsection   to  the   contrary
notwithstanding, an indemnifying party shall not be liable for any settlement of
any claim or action effected  without its written  consent;  provided,  however,
that such consent was not unreasonably withheld.

         8. Contribution.  In order to provide for contribution in circumstances
in which the indemnification  provided for in Section 7 hereof is for any reason
held to be unavailable  from any  indemnifying  party or is insufficient to hold
harmless a party indemnified thereunder,  the Company and the Underwriters shall
contribute to the aggregate losses, liabilities, claims, damages and expenses of
the  nature  contemplated  by  such  indemnification  provision  (including  any
investigation,  legal and other  expenses  incurred in connection  with, and any
amount paid in  settlement  of, any  action,  suit or  proceeding  or any claims
asserted,  but  after  deducting  in  the  case  of  losses,  claims,   damages,
liabilities and expenses  suffered by the Company any  contribution  received by
the Company from persons,  other than the  Underwriters,  who may also be liable
for  contribution,  including persons who control the Company within the meaning
of Section 15 of the Act or Section 20(a) of the Exchange  Act,  officers of the
Company who signed the  Registration  Statement and directors of the Company) as
incurred  to  which  the  Company  and one or more  of the  Underwriters  may be
subject,  in such proportions as is appropriate to reflect the relative benefits
received by the Company and the Underwriters from the offering of the Shares or,
if such allocation is not permitted by applicable law or  indemnification is not
available as a result of the  indemnifying  party not having  received notice as
provided in Section 7 hereof,  in such  proportion as is  appropriate to reflect
not only the relative  benefits referred to above but also the relative fault of
the Company and the  Underwriters in connection with the statements or omissions
which resulted in such losses, liabilities, claims, damages or expenses, as well
as any other relevant equitable  considerations.  The relative benefits received
by the Company and the Underwriters shall be deemed to be in the same proportion
as (x) the total proceeds from the offering (net of  underwriting  discounts and
commissions but before deducting  expenses)  received by the Company and (y) the
underwriting   discounts   and   commissions   received  by  the   Underwriters,
respectively,  in each case as set  forth in the table on the cover  page of the


                                       22
<PAGE>

Prospectus.  The relative fault of the Company and of the Underwriters  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  the
Underwriters and the parties' relative intent, knowledge,  access to information
and  opportunity  to  correct or  prevent  such  statement  or  omission  or any
violation  of the nature  referred to in Section  7(a)(ii).  The Company and the
Underwriters  agree  that it would  not be just and  equitable  if  contribution
pursuant to this Section 8 were determined by pro rata  allocation  (even if the
Underwriters were treated as one entity for such purpose) or by any other method
of  allocation  which  does not take  account  of the  equitable  considerations
referred to above.  Notwithstanding  the provisions of this Section 8, (i) in no
case shall any  Underwriter be liable or responsible for any amount in excess of
the underwriting  discount and commission  applicable to the Shares purchased by
such   Underwriter   hereunder,   and  (ii)  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.  Notwithstanding  the  provisions  of this  Section 8 and the
preceding sentence, no Underwriter shall be required to contribute any amount in
excess of the amount by which the total  price at which the Shares  underwritten
by it and  distributed  to the public  were  offered to the public  exceeds  the
amount of any damages that such  Underwriter  has otherwise been required to pay
by reason of such  untrue or alleged  untrue  statement  or  omission or alleged
omission.  For purposes of this Section 8, each person,  if any, who controls an
Underwriter  within the meaning of Section 15 of the Act or Section 20(a) of the
Exchange Act shall have the same rights to contribution as such Underwriter, and
each person,  if any, who controls the Company  within the meaning of Section 15
of the Act or Section 20(a) of the Exchange Act, each officer of the Company who
shall have signed the  Registration  Statement  and each director of the Company
shall have the same rights to contribution as the Company,  subject in each case
to clauses (i) and (ii) of this  Section 8. Any party  entitled to  contribution
will,  promptly after receipt of notice of commencement  of any action,  suit or
proceeding  against such party in respect of which a claim for  contribution may
be made against another party or parties, notify each party or parties from whom
contribution may be sought,  but the omission to so 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 under this Section 8 or otherwise.  No party
shall be liable for  contribution  with  respect to any action or claim  settled
without its consent;  provided,  however, that such consent was not unreasonably
withheld.

         9. Default by an Underwriter.

                  (a) If any Underwriter or Underwriters shall default in its or
their obligation to purchase Firm Shares or Additional Shares hereunder,  and if
the Firm Shares or Additional  Shares with respect to which such default relates
do not (after  giving  effect to  arrangements,  if any, made by you pursuant to
subsection  (b) below)  exceed in the aggregate 10% of the number of Firm Shares
or Additional  Shares, the Firm Shares or Additional Shares to which the default
relates shall be purchased by the  non-defaulting  Underwriters in proportion to
the respective  proportions  which the numbers of Firm Shares set forth opposite
their respective names in Schedule I hereto bear to the aggregate number of Firm
Shares set forth opposite the names of the non-defaulting Underwriters.



                                       23
<PAGE>

                  (b) In the event that such default relates to more than 10% of
the Firm  Shares  or  Additional  Shares,  as the  case may be,  you may in your
discretion  arrange for yourself or for another party or parties  (including any
non-defaulting  Underwriter or Underwriters  who so agree) to purchase such Firm
Shares or Additional  Shares,  as the case may be, to which such default relates
on the terms contained herein. In the event that within five calendar days after
such a  default  you do not  arrange  for the  purchase  of the Firm  Shares  or
Additional Shares, as the case may be, to which such default relates as provided
in this Section 9, this  Agreement  or, in the case of a default with respect to
the Additional  Shares,  the obligations of the  Underwriters to purchase and of
the Company to sell the Additional  Shares shall  thereupon  terminate,  without
liability on the part of the Company with respect  thereto  (except in each case
as provided in Sections 5, 7(a) and 8 hereof) or the  Underwriters,  but nothing
in this Agreement shall relieve a defaulting  Underwriter or Underwriters of its
or their  liability,  if any,  to the other  Underwriters  and the  Company  for
damages occasioned by its or their default hereunder.

                  (c) In the event that the Firm Shares or Additional  Shares to
which  the  default   relates  are  to  be  purchased   by  the   non-defaulting
Underwriters,  or are to be purchased by another  party or parties as aforesaid,
you or the  Company  shall  have  the  right to  postpone  the  Closing  Date or
Additional  Closing Date, as the case may be, for a period,  not exceeding  five
business days, in order to effect whatever changes may thereby be made necessary
in the  Registration  Statement or the Prospectus or in any other  documents and
arrangements,  and  the  Company  agrees  to  file  promptly  any  amendment  or
supplement to the Registration Statement or the Prospectus which, in the opinion
of Underwriters'  Counsel, may thereby be made necessary or advisable.  The term
"Underwriter"  as used in this  Agreement  shall  include any party  substituted
under this  Section 9 with like effect as if it had  originally  been a party to
this Agreement with respect to such Firm Shares and Additional Shares.

         10. Survival of Representations and Agreements. All representations and
warranties,  covenants  and  agreements  of the  Underwriters  and  the  Company
contained in this  Agreement,  including the agreements  contained in Section 5,
the indemnity agreements contained in Section 7 and the contribution  agreements
contained  in  Section 8, shall  remain  operative  and in full force and effect
regardless of any  investigation  made by or on behalf of any Underwriter or any
controlling  person  thereof  or by or on  behalf  of  the  Company,  any of its
officers and  directors or any  controlling  person  thereof,  and shall survive
delivery  of and  payment  for  the  Shares  to and  by  the  Underwriters.  The
representations  contained in Section 1 and the agreements contained in Sections
5, 7, 8 and 11(d)  hereof  shall  survive  the  termination  of this  Agreement,
including termination pursuant to Section 9 or 11 hereof.

         11. Effective Date of Agreement; Termination.

                  (a) This  Agreement  shall become  effective upon the later of
when  (i)  you  and  the  Company  shall  have  received   notification  of  the
effectiveness  of the  Registration  Statement  or (ii)  the  execution  of this
Agreement. If either the initial public offering price or the purchase price per
Share has not been agreed upon prior to 5:00 P.M.,  New York time,  on the sixth
full business day after the Registration  Statement shall have become effective,
this Agreement shall thereupon terminate without liability to the Company or the
Underwriters except as herein expressly  provided.  Until this Agreement becomes
effective as aforesaid,  it may be terminated by the Company by notifying you or
by you by notifying the Company.  Notwithstanding the


                                       24
<PAGE>

foregoing,  the  provisions  of this  Section 11 and of  Sections  1, 5, 7 and 8
hereof shall at all times be in full force and effect.

                  (b) You shall have the right to  terminate  this  Agreement at
any time prior to the Closing Date or the  obligations  of the  Underwriters  to
purchase the Additional Shares at any time prior to the Additional Closing Date,
as the  case  may be,  if (A) any  domestic  or  international  event  or act or
occurrence  has materially  disrupted,  or in your opinion will in the immediate
future materially disrupt, the market for the Company's securities or securities
in general;  or (B) if trading on the New York Stock Exchange or on NASDAQ shall
have been  suspended,  or minimum or maximum  prices for trading shall have been
fixed, or maximum ranges for prices for securities shall have been required,  on
the New  York or  American  Stock  Exchanges  or on  NASDAQ  by the New  York or
American  Stock  Exchanges or NASDAQ or by order of the  Commission or any other
governmental  authority having jurisdiction;  or (C) if a banking moratorium has
been  declared  by a  state  or  federal  authority  or if any  new  restriction
materially  adversely  affecting  the  distribution  of the Firm  Shares  or the
Additional  Shares, as the case may be, shall have become effective;  or (D) (i)
if the United States becomes engaged in hostilities or there is an escalation of
hostilities  involving the United States or there is a declaration of a national
emergency  or war by the  United  States or (ii) if there  shall  have been such
change in political, financial or economic conditions, if the effect of any such
event in (i) or (ii) in your judgment makes it  impracticable  or inadvisable to
proceed  with  the  offering,  sale  and  delivery  of the  Firm  Shares  or the
Additional  Shares,  as the  case  may  be,  on the  terms  contemplated  by the
Prospectus.

                  (c) Any  notice of  termination  pursuant  to this  Section 11
shall be by telephone,  facsimile, telex, or telegraph,  confirmed in writing by
letter.

                  (d) If this Agreement  shall be terminated  pursuant to any of
the provisions  hereof  (otherwise  than pursuant to (i)  notification by you as
provided in Section  11(a) hereof or (ii) Section 9(b) or 11(b)  hereof),  or if
the sale of the  Shares  provided  for  herein is not  consummated  because  any
condition  to the  obligations  of the  Underwriters  set  forth  herein  is not
satisfied  or because of any  refusal,  inability  or failure on the part of the
Company to perform any agreement herein or comply with any provision hereof, the
Company  will,  subject to demand by you,  reimburse  the  Underwriters  for all
out-of-pocket  expenses  (including  the fees  and  expenses  of their  counsel)
incurred by the Underwriters in connection herewith.

         12. Notices. All communications  hereunder,  except as may be otherwise
specifically  provided  herein,  shall  be  in  writing  and,  if  sent  to  any
Underwriter,  shall be mailed, delivered, sent by facsimile,  telex or telegraph
and confirmed in writing,  to such Underwriter c/o Bear, Stearns & Co. Inc., 245
Park Avenue, New York, NY 10167, Attention:  Equity Syndicate;  facsimile number
(212)  272-3485;  if sent to the Company,  shall be mailed,  delivered,  sent by
facsimile,  telex or telegraph  and  confirmed  in writing to the Company,  6010
Executive  Boulevard,   10th  Floor,  North  Bethesda,   MD  20852,   Attention:
______________; facsimile number ________.

         13.  Parties.  This Agreement shall inure solely to the benefit of, and
shall be binding  upon,  the  Underwriters  and the Company and the  controlling
persons, directors, officers, employees and agents referred to in Sections 7 and
8, and their respective  successors and assigns,


                                       25
<PAGE>

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 provision  herein  contained.  The term  "successors  and assigns" shall not
include  a  purchaser,  in its  capacity  as  such,  of  Shares  from any of the
Underwriters.

         14. Governing Law. This Agreement shall be governed by and construed in
accordance  with the laws of the  State  of New  York,  but  without  regard  to
principles of conflicts of law.

         15.  Counterparts.  This  Agreement  may  be  signed  in  two  or  more
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

         16. Headings.  The headings of the sections of this Agreement have been
inserted for  convenience  of  reference  only and shall not be deemed a part of
this Agreement.




                            [Signature Page Follows]


                                       26
<PAGE>

         If the foregoing correctly sets forth the understanding between you 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,

                                      INFORMAX, INC.



                                      By
                                        ------------------------------
                                         Name:
                                         Title:

Accepted as of the date first above written

BEAR, STEARNS & CO. INC.
U.S. BANCORP PIPER JAFFRAY INC.
ADAMS, HARKNESS & HILL

By BEAR, STEARNS & CO. INC.



   By
     ----------------------------
      Name:
      Title:

On behalf of themselves and the other
Underwriters named in Schedule I hereto.


<PAGE>

                                   SCHEDULE I

                                                        Number of Firm
Name of Underwriter                                  Shares to be Purchased
-------------------                                  ----------------------

Bear, Stearns & Co. Inc.

U.S. Bancorp Piper Jaffray Inc.

Adams, Harkness & Hill

Total .............................................





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