EXHIBIT 1 FORM OF VOTING AGREEMENT AND IRREVOCABLE PROXYVoting Agreement and Irrevocable Proxy • March 31st, 2000 • Celltech Group PLC • In vitro & in vivo diagnostic substances • New York
JOINT FILING AGREEMENT This will confirm the agreement by and among all the undersigned that the Schedule 13D filed on or about this date (the "Schedule 13D") with respect to the beneficial ownership by the undersigned of shares of common stock, par...Joint Filing Agreement • March 31st, 2000 • Celltech Group PLC • In vitro & in vivo diagnostic substances
This will confirm the agreement by and among all the undersigned that the Schedule 13D filed on or about this date (the "Schedule 13D") with respect to the beneficial ownership by the undersigned of shares of common stock, par value $.01 per share, of Cistron Biotechnology, Inc., a Delaware corporation, is being, and any and all amendments thereto may be, filed on behalf of each of the undersigned.
