Collagen and gelatins were extracted from channel catfish (Ictalurus punctatu) skin, and properties of collagen and gelatins were studied. Furthermore, collagenous peptides were derived from channel catfish skin gelatin digested using Alcalse and trypsin. Those collagenous peptides showed protective effects on mice skin by removing free radicals for its strong antioxidant. A peptide with 9 amino acids was purified and characterized.
Acid-soluble and pepsin-soluble collagens (ASC and PSC) were extr...