Plasminogen activation with single-chain urokinase-type plasminogen activator (scu-PA). Studies with active site mutageiiized plasminogen (Ser740 → Ala) and plasmin resistant scu-PA (Lys158 → Glu) - Lijnen, H R; Van Hoef, B; Nelles, L; Collen, D (J Biol Chem, 1990)