2WY2:
reference: Solution structure of the IIAChitobiose-IIBChitobiose complex of the N,N'-diacetylchitobiose branch of the Escherichia coli phosphotransferase system., Jung YS, Cai M, Clore GM, J Biol Chem. 2010 Feb 5;285(6):4173-84. Epub 2009 Dec 3. PMID: 19959833

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