2CSD:
reference: Structure of the N-terminal fragment of topoisomerase V reveals a new family of topoisomerases., Taneja B, Patel A, Slesarev A, Mondragon A, EMBO J. 2006 Jan 25;25(2):398-408. Epub 2006 Jan 5. PMID: 16395333

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