Rhodopila globiformis has a redox potential of ca. -450 mV). Several HiPIPs have so far been characterized structurally, their folds belonging to the α+β class. As in other bacterial ferredoxins, the [Fe4S4] unit forms a cubane-type cluster and is ligated to the protein via four Cys residues. Human proteins from ferredoxin family 2Fe–2S: AOX1; FDX1; FDX2; NDUFS1; SDHB; XDH; 4Fe–4S: ABCE1; DPYD; NDUFS8; References Further reading External links - 2Fe–2S ferredoxin subdomain - Adrenodoxin - 4Fe–4S ferredoxin, iron–sulfur binding - High potential iron–sulfur protein - X-ray structure of thioredoxin-like ferredoxin from Aquifex aeolicus (AaFd) Iron–sulfur proteins Photosynthesis