The Enzyme Meprin (image) Caption The enzyme meprin is located at the cell wall (lined-up white balls). The enzyme binds a protein (red) within its active site cleft (light blue) to cleave it. Credit Christoph Becker-Pauly & Xavier Gomis-Rüth Usage Restrictions None 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.