2XYL:
reference: Exploring the cellulose/xylan specificity of the beta-1,4-glycanase cex from Cellulomonas fimi through crystallography and mutation., Notenboom V, Birsan C, Warren RA, Withers SG, Rose DR, Biochemistry. 1998 Apr 7;37(14):4751-8. PMID: 9537990

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