4D2I:
reference: Structure of the hexameric HerA ATPase reveals a mechanism of translocation-coupled DNA-end processing in archaea., Rzechorzek NJ, Blackwood JK, Bray SM, Maman JD, Pellegrini L, Robinson NP, Nat Commun. 2014 Nov 25;5:5506. doi: 10.1038/ncomms6506. PMID: 25420454

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