5U2P:
reference: Functional clues from the crystal structure of an orphan periplasmic ligand-binding protein from Treponema pallidum., Brautigam CA, Deka RK, Liu WZ, Tomchick DR, Norgard MV, Protein Sci. 2017 Feb 7. doi: 10.1002/pro.3133. PMID: 28168761

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