Fallaxidin-4.1 shows antibacterial activity against the Gram-positive bacteria L.lactis (MIC=12 uM), M.luteus (MIC=100 uM), S.epidermidis (MIC=100 uM) and S.uberis (MIC=50 uM). No anti-bacterial activity against the Gram-positive bacteria B.cereus, E.faecalis, L.innocua, S.aureus, or the Gram-negative bacteria E.cloacae and E.coli. Inhibits the formation of NO by neuronal nitric oxide synthase with an IC(50) of 13.3 uM. Expressed by the skin glands. Belongs to the frog skin active peptide (FSAP) family. Brevinin subfamily.