MetalsCations, DivalentManganeseCation Transport ProteinsIron-Binding ProteinsMagnesiumCobaltZincIronMetals, Alkaline EarthRNA, CatalyticKineticsCopperNickelBinding SitesCatalysisMetals, AlkaliCations, MonovalentIonsHydrogen-Ion ConcentrationSubstrate SpecificityMolecular Sequence DataModels, MolecularDNA, CatalyticEdetic AcidCationsChelating AgentsCadmiumNucleic Acid ConformationFerrous CompoundsMetals, HeavyAmino Acid SequenceLeadEscherichia coliAbiesCatalytic DomainBase SequenceDuodenumCrystallography, X-RayProtein BindingCalciumPhenanthrolinesMercury CompoundsManganese CompoundsMethionyl AminopeptidasesFerric CompoundsReceptors, TransferrinProtein ConformationStrontiumHistidineIron RadioisotopesChromomycin A3Bacterial ProteinsHydrolysisIron, DietaryModels, ChemicalMercuryMetalloproteinsTemperatureFramycetinCalcium ChlorideDNAProtein Structure, TertiaryRibonuclease PEnzyme StabilityBacitracinBiological TransportAldehyde-LyasesApoferritinsBiocatalysisTitrimetryDNA CleavageMagnetic Resonance SpectroscopyMolecular StructureMolecular WeightEndoribonucleasesIron-Regulatory ProteinsRecombinant ProteinsElectrophoresis, Polyacrylamide GelFerritinsCircular DichroismHepcidinsMutagenesis, Site-DirectedSequence Homology, Amino AcidAdenosine TriphosphateIron Regulatory Protein 1Thermotoga maritimaElectron Spin Resonance SpectroscopyChromiumRNACoenzymesPhosphatesStructure-Activity RelationshipHepatitis Delta VirusTransferrinProtein Structure, SecondaryEscherichia coli ProteinsAminopeptidasesTetrahymenaCarrier Proteins