https://www.ncbi.nlm.nih.gov/Structure/pdb/5AA5
5AA5: Actinobacterial-type NiFe-hydrogenase from Ralstonia eutropha H16 at 2.85 Angstrom resolution
NIFE-HYDROGENASE LARGE SUBUNIT, HOFGNIFE-HYDROGENASE SMALL SUBUNIT, HOFKIRON/SULFUR CLUSTERMALONIC ACIDformyl[bis(hydrocyanato-1kappaC)]ironnickel(Fe-Ni)