1UN1: Xyloglucan Endotransglycosylase Native Structure.
reference: Crystal structures of a poplar xyloglucan endotransglycosylase reveal details of transglycosylation acceptor binding., Johansson P, Brumer H 3rd, Baumann MJ, Kallas AM, Henriksson H, Denman SE, Teeri TT, Jones TA, Plant Cell 2004 Apr;16(4):874-86. Epub 2004 Mar 12. PMID: 15020748

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