Induces contraction of smooth muscle in isolated guinea pig urinary bladder (EC50=4.66 nM). Has no antimicrobial activity against the Gram-positive bacterium S.aureus, the Gram-negative bacterium E.coli and the yeast C.albicans. Elicits histamine release from rat peritoneal mast cells. Expressed by the skin glands. With amidation. Belongs to the frog skin active peptide (FSAP) family. Brevinin subfamily.