3NX8:
reference: Experimental and Computational Active Site Mapping as a Starting Point to Fragment-Based Lead Discovery., Behnen J, Koster H, Neudert G, Craan T, Heine A, Klebe G, ChemMedChem. 2011 Dec 23. doi: 10.1002/cmdc.201100490. PMID: 22213702

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