Catalytic Portion of Telomerase (IMAGE) The Wistar Institute Caption This model structure of the catalytic portion of telomerase shows how the TFLY motif (green) is positioned at the entry of the pocket that guides the RNA template in the interior cavity of the telomerase ring and were the active site of the enzyme if located for catalysis. Credit Emmanuel Skordalakes/The Wistar Institute Usage Restrictions With credit. 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.