Antibacterial protein. Strong activity against the Gram-positive bacteria M.luteus, B.megaterium and S.aureus. Reduced activity against Gram-positive bacterium B.subtilis and weak activity against Gram-negative bacterium X.japonicus. No detectable activity against the Gram-negative bacteria E.asbriae, E.coli, P.aeruginosa and S.marcescens. Belongs to the invertebrate defensin family. Type 1 subfamily.