1WB4:
reference: Molecular determinants of substrate specificity in the feruloyl esterase module of xylanase 10B from Clostridium thermocellum., Tarbouriech N, Prates JA, Fontes CM, Davies GJ, Acta Crystallogr D Biol Crystallogr. 2005 Feb;61(Pt 2):194-7. Epub 2005, Jan 19. PMID: 15681871

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