EXHIBIT 2 JOINT FILING AGREEMENT OF AMPERSAND SPECIALTY MATERIALS AND CHEMICALS II LIMITED PARTNERSHIP, AMPERSAND SPECIALTY MATERIALS AND CHEMICALS III LIMITED PARTNERSHIP, ASMC-II MANAGEMENT COMPANY LIMITED PARTNERSHIP, ASMC-III MANAGEMENT COMPANY...Joint Filing Agreement • February 9th, 2000 • Charpie Richard A • Biological products, (no disgnostic substances)
