Antibacterial peptide, that adopts an alpha helical conformation which can disrupt bacterial membranes. Each caerin displays a different antimicrobial specificity. Expressed by the skin dorsal glands. Contains two amphipathic alpha helix regions separated by a region of less-defined helicity and greater flexibility. Caerin-1.7.1 does not have any antibacterial activity. Belongs to the frog skin active peptide (FSAP) family. Caerin subfamily.