Snake venom serine protease that clots human plasma and bovine fibrinogen. Upon intravenous injection in mice, this protease renders blood unclottable (defibri(ogen)ation). Intravenous administration (10 and 5 ug) induces a gyroxin-like effect: loss of the righting reflex, opisthotonus, and intermittent rotations over the long axis of the body. These effects persisted during approximately 10 minutes, after which the animals apparently recovers. Inhibited by PMSF. Monomer. Expressed by the venom gland. The different mass observed by mass spectrometry may represent 3 different glycoforms that bear a single non- (27066), mono- (27357), and di-sialylated (27649), fucosylated complex-type dianntenary glycan chain. Glycoform 1. Glycoform 2. Glycoform 3. Belongs to the peptidase S1 family. Snake venom subfamily.