5AA5:
reference: Structure of an Actinobacterial-Type [NiFe]-Hydrogenase Reveals Insight into O-Tolerant H Oxidation., Schafer C, Bommer M, Hennig SE, Jeoung JH, Dobbek H, Lenz O, Structure. 2015 Dec 29. pii: S0969-2126(15)00499-2. doi:, 10.1016/j.str.2015.11.010. PMID: 26749450

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