6GEB:
reference: X-ray Crystal Structures of the Type IVb Secretion System DotB ATPases., Prevost MS, Waksman G, Protein Sci. 2018 May 17. doi: 10.1002/pro.3439. PMID: 29770512

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