2JYK:
reference: Identification of Intrinsic Dynamics in a DNA Sequence Preferentially Cleaved by Topoisomerase II Enzyme., Masliah G, Rene B, Zargarian L, Fermandjian S, Mauffret O, J Mol Biol. 2008 Jun 17;. PMID: 18585388

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).