Nonheme Iron ProteinsHemerythrinIronNitrogenaseIron, DietaryIron RadioisotopesMetalloproteinsIron Chelating AgentsChromatiumFerritinsFerredoxinsFerrous CompoundsAzotobacter vinelandiiFerrozineOxidoreductasesIron CompoundsIron IsotopesAbsorptionRubredoxinsHemeFerric CompoundsAzotobacterElectron Spin Resonance SpectroscopyBiological AvailabilityIntestinal AbsorptionGastric LavageFood AnalysisOxidation-ReductionRhodospirillum rubrumIron OverloadPeptococcusTransferrinMeatAmino Acid SequenceIron-Sulfur ProteinsDioxygenasesMolecular Sequence DataOxygenasesBacterial ProteinsClostridiumMolybdoferredoxinAnemia, Iron-DeficiencyAscorbic AcidSpectrophotometryKineticsGlycerylphosphorylcholineSpectroscopy, MossbauerManganese CompoundsVegetable ProteinsProtein ConformationSpectrum AnalysisOxygenDesulfovibrioDietPeroxidesKetoglutaric AcidsHemoglobinsAdenosine DiphosphateQuantum TheoryDithioniteButylated HydroxytolueneNutritive ValueCalcium, DietaryHematocritSoybeansProtein SubunitsModels, MolecularAdenosine TriphosphateBase Sequence