Exhibit 4.3 [Face of Security] ANTIGENICS INC. Certificate No. _______ [INSERT PRIVATE PLACEMENT LEGEND AND GLOBAL SECURITY LEGEND] 5.25% Convertible Senior Note due 2025 CUSIP No. ____________ Antigenics Inc., a Delaware corporation (the "COMPANY"),...Convertible Senior Note Agreement • May 24th, 2005 • Antigenics Inc /De/ • Biological products, (no disgnostic substances)
