1YP7:
reference: Van der Waals Interactions Dominate Ligand-Protein Association in a Protein Binding Site Occluded from Solvent Water., Barratt E, Bingham RJ, Warner DJ, Laughton CA, Phillips SE, Homans SW, J Am Chem Soc 2005 Aug 24;127(33):11827-11834. PMID: 16104761

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