6GDT:
reference: Structure of the GH9 glucosidase/glucosaminidase from Vibrio cholerae., Wu L, Davies GJ, Acta Crystallogr F Struct Biol Commun. 2018 Aug 1;74(Pt 8):512-523. doi:, 10.1107/S2053230X18011019. Epub 2018 Aug 6. PMID: 30084401

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