CST–Polymerase (IMAGE) Rockefeller University Caption CST–Polα/primase, the enzyme that solves the newly discovered end-replication problem. Credit Credit Sarah Cai Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. License Original 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.