A catalase from fresh Perna Viridis had been purified by the use of saline extraction,ammonium sulfate precipition and DEAE-Sepharose FF column chromatography.It was identified as glycoprotein and the neutral saccharide content of the enzyme was assayed as about 1056% .The enzyme subunit molecular weight was about 76000 as determined by SDS-polyacrylamide gel electrophoresis.The experiment result indicated that the optimal temperatme and pH of the enzyme were 35℃ and 7 respectively.The enzyme was not sta...