Poxvirus-Polymerase (IMAGE) University of Würzburg Caption Structure of the poxvirus-polymerase in an early stage of transcription. Bound DNA is labelled in blue. Credit Clemens Grimm Usage Restrictions None 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.