Isolation and Characteristics of Collagen from Fish Waste Material

Collagen is the most abundant protein of animal origin, comprising approximately 30% of total animal protein. There are at least 19 variants of collagen, named type I to XIX. Types I, II, III and V are the fibrous collagens. Type I collagen is found in all connective tissue, including bones and skins. It is a heteropolymer of two "1 chains and one "2 chain. It consists of one-third glycine, contains no tryptophan or cysteine and is very low in tyrosine and histidine. Guanidine hydrochloride to solubilize the part of collagen referred as GSC and then RS-AL (crude connective tissue fractions) digested with pepsin called PSC were extracted from the fish tissues. Applications of fishes collagen is different in different industries.