4OHR:
reference: Structure of the N-glycosidase MilB in complex with hydroxymethyl CMP reveals its Arg23 specifically recognizes the substrate and controls its entry., Zhao G, Wu G, Zhang Y, Liu G, Han T, Deng Z, He X, Nucleic Acids Res. 2014 Jun 11. pii: gku486. PMID: 24920828

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