title: Metal coordination centres of class II cytochromes c.
abstract: The class II cytochromes Rhodospirillum molischianum cytochrome c', Rhodopseudomonas palustris cytochrome C556 and Agrobacterium tumefaciens (B2a) cytochrome c556 have been investigated with a variety of spectroscopic techniques. The cytochrome c' was found to be high-spin and the two cytochromes c556 were found to be mainly low-spin and sx-coordinate with the fifth and sixth ligands being histidine and methionine. The implications of the different types of iron coordination are discussed.
mesh_terms: D003574:Cytochrome c Group / Q000145:classification*; D007501:Iron; D009682:Magnetic Resonance Spectroscopy; D012231:Rhizobium; D012241:Rhodopseudomonas; D012246:Rhodospirillum; D013053:Spectrophotometry
chemical_list: D003574:Cytochrome c Group; C020267:cytochrome c556; D007501:Iron