2GZA:
reference: A Large Domain Swap in the VirB11 ATPase of Brucella suis Leaves the Hexameric Assembly Intact., Hare S, Bayliss R, Baron C, Waksman G, J Mol Biol. 2006 Jun 30;360(1):56-66. Epub 2006 May 11. PMID: 16730027

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