pAgo (image) Hong Kong University of Science and Technology Share Print E-Mail Caption R545 is critical in DNA cleavage of TtAgo, while R486 plays a negligible role. (Left) Catalytic tetrad with plugged-in glutamate finger (yellow). (Right) Credit Hong Kong University of Science and Technology Usage Restrictions None Share Print E-Mail 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.