Selectively inhibits the toxic properties of myotoxin-II from the same venom (AC P81165) (PubMed:10698689). Does not inhibit PLA2, anti-coagulant and lethal activities of the basic myotoxin I from the same venom (AC P0DQP6), nor the different crotoxin forms (heterodimer or subunit B alone) (PubMed:10698689). Does not block the enzymatic activity of crude acidic PLA2 fractions from the same venom (PubMed:10698689). Homomer composed of 20-25-kDa subunits that form oligomers of 180 kDa. Secreted in plasma. Expressed by the liver. N-glycosylated. The glycosidic chain may contain superficial sialic acid residues. Belongs to the alpha-type phospholipase A2 inhibitor family.