Structure of Supercoiled DNA (2 of 2) (IMAGE) University of Leeds Caption The image shows the structure of the DNA calculated with the supercomputer simulations (in colour) superimposed upon the cryo-electron tomography data (in white or yellow). (There is no superimposition onto cryo-electron tomography data for the purple figure-8 shape.) You can see that the familiar double helix has been either simply bent into a circle or twisted into a figure-8. Credit Thana Sutthibutpong 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.