TransferrinReceptors, TransferrinIronIron RadioisotopesConalbuminApoproteinsRibonucleotide ReductasesFerric CompoundsHemerythrinSpectroscopy, MossbauerTransferrin-Binding Protein BReticulocytesKineticsElectron Spin Resonance SpectroscopyFerritinsFree RadicalsEndocytosisTyrosineReceptors, Cell SurfaceBinding SitesOxidation-ReductionHydrogen-Ion ConcentrationModels, MolecularEscherichia coliProtein BindingCell Membrane