Antimicrobial peptide with broad-spectrum activity against Gram-positive bacteria, Gram-negative bacteria, and fungi. Also inhibits clinical isolates, including methicillin-resistant S.aureus (MRSA) (MIC=32 uM), K.pneumoniae, C.albicans and C.parapsilosis. Displays minimal inhibitory concentration (MIC) values similar to minimal bactericidal concentrations (MBC), suggesting a disruptive mechanism mode of action associated with membrane lysis. In vitro, shows hemolytic activity against human red blood cells. Disulfide bonds are essential for antimicrobial activity. Belongs to the invertebrate defensin family.