Damaged Amino acids ID'ed in Study (IMAGE) Washington University in St. Louis Caption The three-colored formations (red, purple, yellow) are the three groups of damaged amino acids in Photosystem II identified in this study. They are centered on the active site ("Mn cluster," shown in green), and trace three pathways connecting the Mn cluster to the surface of the complex, the watery bulk medium of the cell. Credit (Credit: <i>Science Advances</i> manuscript # aao3013, Figure 3B.) 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.