3UZ0:
reference: Structure of the basal components of a bacterial transporter., Meisner J, Maehigashi T, Andre I, Dunham CM, Moran CP Jr, Proc Natl Acad Sci U S A. 2012 Apr 3;109(14):5446-51. Epub 2012 Mar 19. PMID: 22431613

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