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Sample Business Contracts

Proxy Card - Aronex Pharmaceuticals Inc.

ARONEX PHARMACEUTICALS, INC.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
SPECIAL MEETING TO BE HELD _________, 2001

The undersigned hereby appoints Geoffrey F. Cox, Ph.D. and Terance A. Murnane and each of them, as proxies, each with the power to appoint his substitute, and hereby authorizes them to represent and vote, as designated on the reverse side, all of the shares of the common stock of Aronex Pharmaceuticals, Inc. (the "Company") held of record by the undersigned on June 1, 2001 at the Special Meeting (the "Special Meeting") of Stockholders of the Company to be held on _________, ________ 2001, at 9:00 a.m., local time at the offices of Palmer & Dodge LLP, One Beacon Street, Boston, Massachusetts, and any adjournment(s) thereof.

It is important that your shares be represented at the Special Meeting regardless of whether you plan to attend. THEREFORE, PLEASE MARK, SIGN AND DATE THE ENCLOSED PROXY AND RETURN IT IN THE ACCOMPANYING POSTPAID ENVELOPE AS PROMPTLY AS POSSIBLE. If you are present at the Special Meeting, and wish to do so, you may revoke the proxy and vote in person.

(To be Dated And Signed On Reverse Side) 2


Please date, sign and mail your proxy card back as soon as possible!
Special Meeting of Stockholders
Aronex Pharmaceuticals, Inc.
______________, 2001 --------------------------------------------------------------------------------

A [ X ] PLEASE MARK YOUR |
VOTES AS IN THIS |
EXAMPLE. |- - -



1. To adopt and approve the FOR AGAINST ABSTAIN
Agreement and Plan of Merger [ ] [ ] [ ]
dated as of April 23, 2001
among Antigenics Inc.,
Nasa Merger Corp. and
Aronex Pharmaceuticals, Inc.; and

_______________________________________________________________________________

To act upon such other business as may properly come before the meeting or
any adjournments thereof.

Only stockholders of record at the close of business on June 1, 2001
will be entitled to notice of and to vote at the Annual Meeting.

SIGNATURE DATE
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SIGNATURE DATE
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Signature is held jointly

NOTE: Please execute this Proxy as your name appears hereon. When shares are
held by joint tenants, both should sign. When signing as attorney,
executor, administrator, trustee or guardian, please give full title as
such. If a corporation, please sign in full corporate name by the
president or other authorized officer. If a partnership, please sign in
partnership name by authorized person.