2G7C:
reference: Carbohydrate recognition by Clostridium difficile toxin A., Greco A, Ho JG, Lin SJ, Palcic MM, Rupnik M, Ng KK, Nat Struct Mol Biol. 2006 May;13(5):460-1. Epub 2006 Apr 16. PMID: 16622409

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