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EXHIBIT 1
JOINT FILING AGREEMENT
Pursuant to Rule 13d-1(k) promulgated under the Securities Exchange Act
of 1934, as amended, the undersigned acknowledge and agree that the foregoing
statement on Schedule 13D dated October 25, 2000 is filed on behalf of each of
the undersigned and that all subsequent amendments to this statement shall be
filed on behalf of each of the undersigned without the necessity of filing
additional joint filing agreements. The undersigned acknowledge that each shall
be responsible for the timely filing of such amendments, and for the
completeness and accuracy of the information concerning it contained therein,
but shall not be responsible for the completeness and accuracy of the
information concerning the others, except to the extent that it knows or has
reason to believe that such information is inaccurate. This Joint Filing
Agreement may be executed in counterparts and each of such counterparts taken
together shall constitute one and the same instrument.
Date: October 25, 2000 CORIXA CORPORATION
By: /s/ MICHELLE BURRIS
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Name: Michelle Burris
Title: Vice President and Chief
Financial Officer
/s/ STEVEN GILLIS
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Steven Gillis
/s/ MICHELLE BURRIS
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Michelle Burris
