A great deal of nutrition can be obtained from fresh pigskin . However , Pigskin is wasted as offal for the properties of peculiar smell , poor digest rate , ill taste and hard processing . Thus the technology of extracting biologically active peptides from enzymatic hydrolyzed fresh pigskin was studied systematically .Firstly , the key step , enzymatic hydrolysis process was studied . The effects of main factors were discussed and achieved the optimum reaction condition through monofactor and orthogonalizi...