4DAW:
reference: The Art of Filling Protein Pockets Efficiently with Octahedral Metal Complexes., Blanck S, Maksimoska J, Baumeister J, Harms K, Marmorstein R, Meggers E, Angew Chem Int Ed Engl. 2012 Mar 1. doi: 10.1002/anie.201108865. PMID: 22383326

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