Protein specifically found in the skin of animals belonging to the vertebrate class amphibia, that includes frogs, toads, newts, salamanders and worm-like apoda. The skins of anuran amphibians, in addition to mucous glands, contain highly specialized poison glands, which, in reaction to stress or attack, exude a complex noxious species-specific cocktail of biologically active molecules. These secretions often contain a plethora of peptides such as neuropeptides and hormones. The frog dermatous glands also synthesize and store an extraordinarily rich variety of wide-spectrum antimicrobial peptides that are released onto the outer layer of the skin to provide an effective and fast-acting defense against harmful microorganisms.