Investigation of protein patterns and antioxidant activity of collagen hydrolysates from skin of fan bellied leatherjacket Monacanthus chinensis by various enzymes

The SDS-PAGE results showed that collagen from the skin of this fish consists of α1 and α2 chains with molecular weight (MW) approximately 100 kDa, identified as type I collagen. Hydrolysis of collagen by the other enzymes, such as papain, bromelain, pepsin and alcalase could produce the peptides with MW less than 28 kDa.