concentration,E/S, hydrolysistemperatureand pH valueon theimpactofthehydrolysisdegree, binationofdesignandquadraticregressionorthogonal design. Hydrolysates were purified by gel chromatography, and were characterized by liquid chromatographytandem processwasthesubstrateconcentrationof8%,pH valueof1073,E/Sof1214% andtemperatureof 5680℃. Hydrolysateswere purified by sephadex G 25, the50% inhibitory concen