Replisome Movie (IMAGE) DOE/Brookhaven National Laboratory Caption Three-dimensional structure of the active DNA helicase is bound to the front-end DNA polymerase (Pol epsilon). The DNA polymerase epsilon (green) sits on top rather than the bottom of the helicase. Credit Brookhaven National Laboratory Usage Restrictions OK for use with stories about this research. 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.