SiderophoresIronBacterial ProteinsMolecular Sequence DataTitrimetryCalorimetryPotentiometryThermodynamicsHydrogen-Ion ConcentrationBinding SitesProtein BindingKineticsSpectrometry, FluorescenceMagnetic Resonance SpectroscopyCircular DichroismSpectrophotometryModels, MolecularProtein ConformationNuclear Magnetic Resonance, BiomolecularSpectrophotometry, UltravioletOxidation-ReductionAmino Acid SequenceElectron Spin Resonance SpectroscopyTemperatureEscherichia coliLigandsProtein Structure, TertiaryDithioniteHistidineCrystallography, X-RayElectrochemistryModels, ChemicalMathematicsCattlePositive-Pressure RespirationEntropyProtein Structure, SecondaryContinuous Positive Airway PressureProtonsSleep Apnea, ObstructiveCalorimetry, Differential ScanningRecombinant ProteinsPolysomnographySolutionsHemeMolecular StructureChemistryStatic ElectricityProtein DenaturationDithionitrobenzoic AcidChemical PhenomenaSurface Plasmon ResonanceMagnesiumStructure-Activity RelationshipMolecular ConformationAnilino NaphthalenesulfonatesIon-Selective ElectrodesIonsBase SequenceSulfhydryl CompoundsSpectrum AnalysisSubstrate SpecificityBinding, CompetitiveDNA