5T3B:
reference: Structure of a glycoside hydrolase family 50 enzyme from a subfamily that is enriched in human gut microbiome Bacteroidetes., Giles K, Pluvinage B, Boraston AB, Proteins. 2016 Oct 18. doi: 10.1002/prot.25189. PMID: 27756110

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