catalase diagram 2 (IMAGE) University of California - Los Angeles Caption Diagrams showing (left) how catalase acts on symptoms of COVID-19, and a diagram showing what the enzyme does, converting hydrogen peroxide into water and oxygen. Credit Yunfeng Lu research group/UCLA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.