1XS5:
reference: Structural evidence that the 32-kilodalton lipoprotein (Tp32) of Treponema pallidum is an L-methionine-binding protein., Deka RK, Neil L, Hagman KE, Machius M, Tomchick DR, Brautigam CA, Norgard MV, J Biol Chem 2004 Dec 31;279(53):55644-50. Epub 2004 Oct 15. PMID: 15489229

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