2VVS:
reference: Elevation of Global O-GlcNAc Levels in 3T3-L1 Adipocytes by Selective Inhibition of O-GlcNAcase Does Not Induce Insulin Resistance., Macauley MS, Bubb AK, Martinez-Fleites C, Davies GJ, Vocadlo DJ, J Biol Chem. 2008 Dec 12;283(50):34687-95. Epub 2008 Oct 8. PMID: 18842583

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