6RP2:
reference: Aerobic Photocatalytic H2 Production by a [NiFe] hydrogenase Engineered to Place a Silver Nanocluster in the Electron Relay., Zhang L, Morello G, Carr SB, Armstrong FA, J Am Chem Soc. 2020 Jun 24. doi: 10.1021/jacs.0c04302. PMID: 32579353

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