3HUA:
reference: Predicting Ligand Binding Affinity with Alchemical Free Energy Methods in a Polar Model Binding Site., Boyce SE, Mobley DL, Rocklin GJ, Graves AP, Dill KA, Shoichet BK, J Mol Biol. 2009 Sep 24. PMID: 19782087

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