3B6J:
reference: Crystal structure of the NADH:quinone oxidoreductase WrbA from Escherichia coli., Andrade SL, Patridge EV, Ferry JG, Einsle O, J Bacteriol. 2007 Dec;189(24):9101-7. Epub 2007 Oct 19. PMID: 17951395

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