Torsion-Driven Plectoneme Formation. (IMAGE) University of Cambridge Caption Torsion-Driven Plectoneme Formation. Credit Credit: Fei Zheng, Cavendish Laboratory Usage Restrictions For use only in the context of this article. 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.