2WTX:
reference: Mechanistic insight into enzymatic glycosyl transfer with retention of configuration through analysis of glycomimetic inhibitors., Errey JC, Lee SS, Gibson RP, Martinez Fleites C, Barry CS, Jung PM, O'Sullivan AC, Davis BG, Davies GJ, Angew Chem Int Ed Engl. 2010 Feb 8;49(7):1234-7. PMID: 20077550

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