Exhibit 4a SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (the "AGREEMENT"), dated as of ______________, 1997, is entered into by and between the parties listed on Schedule I hereto (individually, a "PURCHASER" and collectively, the...Securities Purchase Agreement • November 14th, 1997 • Dynagen Inc • In vitro & in vivo diagnostic substances • New York
Exhibit 4d STOCK PURCHASE AGREEMENT THIS STOCK PURCHASE AGREEMENT, dated as of the date of acceptance set forth below, is entered into by and between DYNAGEN, INC., a Delaware corporation, with headquarters located at 99 Erie Street, Cambridge,...Stock Purchase Agreement • November 14th, 1997 • Dynagen Inc • In vitro & in vivo diagnostic substances • New York
Exhibit 4e REGISTRATION RIGHTS AGREEMENT THIS REGISTRATION RIGHTS AGREEMENT, dated as of August 21, 1997 (this "Agreement") is made by and between DYNAGEN, INC., a Delaware corporation (the "Company"), and the person named on the signature page hereto...Registration Rights Agreement • November 14th, 1997 • Dynagen Inc • In vitro & in vivo diagnostic substances • New York
RIVERSIDE TECHNOLOGY CENTER COMMERCIAL LEASE BETWEEN RIVERTECH ASSOCIATES, LLC AND DYNAGEN, INC.Lease Agreement • November 14th, 1997 • Dynagen Inc • In vitro & in vivo diagnostic substances
Exhibit 4b MASTER REGISTRATION RIGHTS AGREEMENT MASTER REGISTRATION RIGHTS AGREEMENT (this "AGREEMENT"), dated as of August 6, 1997 by and among DYNAGEN, INC., a Delaware corporation, with headquarters located at 99 Erie Street, Cambridge,...Master Registration Rights Agreement • November 14th, 1997 • Dynagen Inc • In vitro & in vivo diagnostic substances • New York
