Has antibacterial activity against the Gram-positive bacteria S.aureus 1056 MRSA (MIC=1.25 ug/ml) and S.aureus NCTC 4163 (MIC=6.7 ug/ml), and the Gram-negative bacteria E.coli O157:H7 (MIC=0.96 ug/ml) and E.coli 0111 (MIC=6.7 ug/ml). Does not have antifungal activity against the yeast C.albicans 3153A. Belongs to the beta-defensin family.