2QQW:
reference: Crystal structures of Arabidopsis thaliana cell-wall invertase mutants in complex with sucrose., Lammens W, Le Roy K, Van Laere A, Rabijns A, Van den Ende W, J Mol Biol. 2008 Mar 21;377(2):378-85. Epub 2008 Jan 5. PMID: 18258263

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