MetalloproteinsChemistry, BioinorganicRubredoxinsAzurinMetalsZincCopperOxidation-ReductionElectron TransportIronApoproteinsModels, MolecularCadmiumProtein EngineeringMetallothioneinBinding SitesIron-Sulfur ProteinsProtein ConformationAmino Acid SequenceVisual FieldsCysteineMolecular Sequence DataCircular DichroismElectromagnetic FieldsMagnetic Resonance SpectroscopyThermodynamicsMagnetic Fields