Intramolecular electron transfer and binding constants in iron hexacyanide-cytochrome c complexes as studied by pulse radiolysis.
Internal oxidation and reduction rates of horse cytochrome c in the complexes CII . Fe(III)(CN)6(3)- and CIII . Fe(II)(CN)6(4)-, are 4.6 . 10(4)s-1 and 3.3 . 10(2)s-1, respectively. The binding site of the iron hexacyanide ions on either CII or CIII are kinetically almost indistinguishable; binding constants range from 0.87 . 10(3) to 2 . 10(3)M-1. The present pulse radiolytic kinetic data is compared with that from NMR, T-jump and equilibrium dialysis studies.
D000818:Animals; D001665:Binding Sites; D003486:Cyanides; D003574:Cytochrome c Group / Q000378:metabolism; D004579:Electron Transport; D006736:Horses; D007501:Iron; D007700:Kinetics; D010084:Oxidation-Reduction; D011485:Protein Binding
D003486:Cyanides; D003574:Cytochrome c Group; D007501:Iron