1B3Y:
reference: Xylan binding subsite mapping in the xylanase from Penicillium simplicissimum using xylooligosaccharides as cryo-protectant., Schmidt A, Gubitz GM, Kratky C, Biochemistry 1999 Feb 23;38(8):2403-12. PMID: 10029534

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