Mixed valent sites in biological electron transfer.
Many of the active sites involved in electron transfer (ET) in biology have more than one metal and are mixed valent in at least one redox state. These include Cu(A), and the polynuclear Fe-S clusters which vary in their extent of delocalization. In this tutorial review the relative contributions to delocalization are evaluated using S K-edge X-ray absorption, magnetic circular dichroism and other spectroscopic methods. The role of intra-site delocalization in ET is considered.
Solomon
Edward I
EI
Department of Chemistry, Stanford University, Stanford, California 94305, USA. edward.solomon@stanford.edu
Xie
Xiangjin
X
Dey
Abhishek
A
D001665:Binding Sites; D002942:Circular Dichroism / Q000379:methods; D003300:Copper / Q000737:chemistry*; D004579:Electron Transport; D007506:Iron-Sulfur Proteins / Q000737:chemistry*; D010084:Oxidation-Reduction; D013052:Spectrometry, X-Ray Emission / Q000379:methods; D013053:Spectrophotometry / Q000379:methods; D013816:Thermodynamics; D014965:X-Rays
D007506:Iron-Sulfur Proteins; D003300:Copper