A faster acting and more potent form of tissue plasminogen activator - Keyt, B; Paoni, N F; Refino, C J; Berleau, L; Nguyen, H; Chow, A; Lai, J; Pena, L; Pater, C; Ogez, J; Etcheverry, T; Botstein, D; Bennett, W F (Proc Natl Acad Sci USA, 1994)