5NPO:
reference: Promiscuous Protein Binding as a Function of Protein Stability., Cohen-Khait R, Dym O, Hamer-Rogotner S, Schreiber G, Structure. 2017 Dec 5;25(12):1867-1874.e3. doi: 10.1016/j.str.2017.11.002. PMID: 29211984

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