Chemotactic peptide for polymorphonucleated leukocytes (PMNL), but causing no hemolysis to rat erythrocytes and no mast cell degranulation activity at physiological concentrations. Potent antimicrobial peptide against Gram-positive bacteria B.subtilis CCT 2576 (MIC=4 ug/ml), and S.aureus ATCC 6538 (MIC=15 ug/ml) and Gram-negative bacteria E.coli ATCC 25922 (MIC=8 ug/ml) and P.aeruginosa ATCC 15422 (MIC=8 ug/ml). Expressed by the venom gland. Belongs to the MCD family. Mastoparan subfamily.