Polymerase (IMAGE) American Chemical Society Caption Above is an illustration of DNA polymerase moving along the length of a DNA strand. Researchers are targeting new chemotherapy drugs that efficiently block uncontrolled DNA replication while minimizing side effects. Credit The Protein Data Bank 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.