Inhibits bovine trypsin but not chymotrypsin. Also inhibits trypsin-like enzymes from midgut of several lepidopteran species and inhibits larval development in those species. Has fungicidal activity against yeast C.buinensis. Has a bacteriostatic effect against E.coli. Is not cytotoxic. Activity is stable between pH 2 and 11. Activity is stable up to 60 degrees Celsius and declines rapidly at higher temperatures. Monomer and dimer. Monomer. Dimer. Belongs to the protease inhibitor I3 (leguminous Kunitz-type inhibitor) family.