4N5R:
reference: De novo protein crystal structure determination from X-ray free-electron laser data., Barends TR, Foucar L, Botha S, Doak RB, Shoeman RL, Nass K, Koglin JE, Williams GJ, Boutet S, Messerschmidt M, Schlichting I, Nature. 2013 Nov 24. doi: 10.1038/nature12773. PMID: 24270807

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