4MGS:
reference: Xylan utilization in human gut commensal bacteria is orchestrated by unique modular organization of polysaccharide-degrading enzymes., Zhang M, Chekan JR, Dodd D, Hong PY, Radlinski L, Revindran V, Nair SK, Mackie RI, Cann I, Proc Natl Acad Sci U S A. 2014 Aug 18. pii: 201406156. PMID: 25136124

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