6I3G:
reference: Crystal structure of the putative peptide-binding protein AppA from Clostridium difficile., Hughes A, Wilson S, Dodson EJ, Turkenburg JP, Wilkinson AJ, Acta Crystallogr F Struct Biol Commun. 2019 Apr 1;75(Pt 4):246-253. doi:, 10.1107/S2053230X1900178X. Epub 2019 Mar 13. PMID: 30950825

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