Significantly inhibits the growth of Gram-negative and Gram-positive bacteria and fungi in vitro. Has antibacterial activity against S.aureus (MIC=9.6 mg/L), B.subtilis (MIC=76.8 mg/L), M.tetragenus (MIC=38.4 mg/L), E.coli (MIC=76.8 mg/L), V.parahaemolyticus (MIC=19.2 mg/L), and V.anguillarum (MIC=2.1 mg/L). Belongs to the big defensin family.