5VVV:
reference: Structural insights into the substrate binding adaptability and specificity of human O-GlcNAcase., Li B, Li H, Hu CW, Jiang J, Nat Commun. 2017 Sep 22;8(1):666. doi: 10.1038/s41467-017-00865-1. PMID: 28939839

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