1WP5:
reference: Structure of the topoisomerase IV C-terminal domain: a broken beta-propeller implies a role as geometry facilitator in catalysis., Hsieh TJ, Farh L, Huang WM, Chan NL, J Biol Chem 2004 Dec 31;279(53):55587-93. Epub 2004 Oct 4. PMID: 15466871

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