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Exhibit 10.3

October 1, 2002

John Green
4101 Fordham Road, NW
Washington, DC 20016

|    |  |                                                                               
|--- |  | ------------------------------------------------------------------------------
|Re: |  | Letter Agreement Concerning Revised Post Employment
Non-Competition Provisions

Dear John:

In consideration of the promises of the parties to this Letter Agreement,
the receipt and sufficiency of which are hereby acknowledged, the parties agree
to amend the Employment Agreement by and between you and InforMax, Inc.
(InforMax or Company) dated as of February 28, 2001, as amended by that
certain Letter Agreement dated as of February 14, 2002 (the Employment
Agreement) as follows:

The parties agree that Section 6 of the Employment Agreement, captioned
Non-Competition, shall be amended to state:



| |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | 6.      Post-Employment Obligations.   Employee agrees that the
following obligations are reasonable and necessary to protect
InforMaxs business. Employee further acknowledges that these
obligations do not restrict Employees ability to be gainfully
employed, that InforMaxs business is international in scope, and
that any geographic boundary, scope of prohibited activities, and
time duration in these obligations are reasonable in nature and no
broader than are necessary to protect InforMaxs legitimate
business interests. In consideration for Employees employment as
an executive officer and for InforMaxs other promises herein,
Employee agrees that, for the term of this Agreement and for a
period of twelve (12) months following the termination of
employment, except with the express written consent of the
InforMax Board of Directors, Employee shall not directly or
indirectly:



| |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | (a)        solicit
Business (as defined below) from or contract or
conduct Business (other than on behalf of InforMax) with (i) any
person or entity which was a customer of InforMax as of, or within
one year prior to, Employees last day of employment, or (ii) any
prospective customer which InforMax was soliciting as of, or
within one year prior to, his last day of employment. Business
shall mean those products and services that InforMax is engaged in
or is actively developing on the date of Employees termination of
employment;



| |                                                                                                                                                                                                                                                                                                                                                                                 
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | (b)        knowingly
interfere or attempt to interfere with or cause
or attempt to cause the termination of any transaction or
relationship in which InforMax was involved or contemplating
during Employees employment, including but not limited to
relationships with InforMaxs customers and prospective customers,
contractors, vendors, service providers and suppliers;





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| |                                                                                                                                                                                 
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | (c)        hire,
solicit or recruit any of InforMaxs employees, or
any individuals who were employed by InforMax within six (6)
months of Employees last day of employment; or



| |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | (d)        be
employed by, consult for, be an officer or director
of, be a shareholder or owner of (except if as a shareholder or
owner of less than 2% of a publicly traded company), or assist,
engage in, or promote any business or contemplated business that
is competitive with InforMaxs Business, as defined above.
Notwithstanding the foregoing, provided that Employees doing so
does not breach his obligations to maintain the confidentiality of
Proprietary Information as set forth in Section 7 of this
Agreement, Employee may serve in such a capacity for a business
competitive with InforMax as long as Employee serves in a group or
division of that business that is not directly competitive with
InforMaxs Business, as defined above.



| |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
| | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | The
Parties agree that if a court of competent jurisdiction
or other enforcement body finds that any term of this Section 6 is
for any reason excessively broad in scope or duration or for other
reasons finds that a term may not be enforced as written, such
term shall be construed in a manner to enable it to be enforced to
the maximum extent possible. The Parties further agree that a
court of competent jurisdiction or other enforcement body may
modify, delete, blue-pencil, or revise any term of this Section 6
and then enforce this Section 6 as modified.

Unless specifically modified herein, all terms and conditions of the
Employment Agreement and any other employment related agreements shall remain
in full force and effect and you agree that you will continue to be bound by
such agreements.

This Letter Agreement may not be released or abandoned, supplemented or
modified in any manner, orally or otherwise, except by an instrument in writing
signed by you and an officer or director of InforMax. This Letter Agreement
will be governed by the laws of the State of Maryland and the parties agree to
submit to the exclusive jurisdiction of any Maryland court or Federal Court
sitting in Maryland in any action or proceeding arising out of or relating to
this Letter Agreement or the transactions contemplated hereby.

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Please evidence your understanding of and agreement with the above-stated
terms by signing below and returning this Letter Agreement to me.

| |  |                                                                                             | 
| |  | ------------------------------------------------------------------------------------------- | 
| |  | Yours sincerely,                                                                            | 
|
| |  | INFORMAX, INC.                                                                              | 
|
| |  | By:/S/ Andrew P. WhiteleyAndrew P. Whiteley
Chairman, Chief Executive Officer and President | 

|                                                                                | 
|------------------------------------------------------------------------------- | 
|AGREED:                                                                         | 
|                                                                               
|/S/ John M. GreenJohn Green
Chief Financial Officer and
Chief Operating Officer | 
|                                                                               
|Date:  October 1, 2002                                                          | 

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