Plasmin-like serine protease. Has fibrinolytic and fibrinogenolytic but not plasminogenolytic activity. Cleaves after Arg and Lys residues. Inhibited by phenylmethanesulfonyl fluoride (PMSF). Not inhibited by EDTA, EGTA, beta-mercaptoethanol, indoacetamide, benzamidine, aprotinin, pepstatin A and trypsin inhibitor. Optimum pH is 9.0. Activity is stable from pH 6 to 11 but decreases sharply below pH 6. Optimum temperature is 60 degrees Celsius. Activity is stable from 40 to 80 degrees Celsius. The N-terminus is blocked. The order of the peptides shown is unknown.