Thrombin-like snake venom serine protease. The recombinant form clots fibrinogen by cleaving fibrinogen Aalpha chain (FGA), and slowly Bbeta chain (FGB). Has amidolytic activities. Completely inhibited by PMSF, and N-tosyl-Lphenylalanine chloromethyl ketone (TPCK) and poorly inhibited by benzamidine and derivates. Not inhibited by EDTA, heparin and hirudin. Optimum pH is 7.5-8.0. Optimum temperature is 40-50 degrees Celsius. Monomer. Expressed by the venom gland. Has no activity on gamma chain. Belongs to the peptidase S1 family. Snake venom subfamily.