In the present study, corn protein hydrolysate (CPH) with antioxidant activity was obtained by enzymatic hydrolysis. Corn gluten meal (CGM) was hydrolyzed using two proteases (Alcalase and Protamex) to produce the antioxidant peptide. Extrusion and starch removal of corn protein were used as pretreatment procedures before proteolysis. Hydrolysis by Alcalase has more remarkable digesting efficiency on
corn protein than that by Protamex. Therefore, the hydrolysate catalyzed by Alcalase was fractionated by ultrafiltration, and peptide with the highest antioxidant activity was purified from