Exhibit 4.1 SUBSCRIPTION AGREEMENT SUBSCRIPTION AGREEMENT (this "Agreement") made as of the date set forth on the signature page hereof between Xytronyx, Inc., a Delaware corporation, (the "Company") and the undersigned (the "Subscriber"). W I T N E S...Subscription Agreement • December 15th, 1995 • Xytronyx Inc • In vitro & in vivo diagnostic substances • New York
Lock-Up Agreement -----------------Lock-Up Agreement • December 15th, 1995 • Xytronyx Inc • In vitro & in vivo diagnostic substances
Exhibit 4.3 September 11, 1995 New York, New York Paramount Capital, Inc. 375 Park Avenue Suite 1501 New York, New York 10152 Dear Sirs: Xytronyx, Inc., a Delaware corporation (the "Company"), hereby confirms its agreement to retain Paramount Capital,...Xytronyx Inc • December 15th, 1995 • In vitro & in vivo diagnostic substances
