Hydrogen BondingModels, MolecularCrystallography, X-RayProtein ConformationBinding SitesWaterHydrogenMolecular ConformationMolecular StructureProtein Structure, SecondaryCatalytic DomainProtein BindingAmino Acid SequenceMolecular Sequence DataModels, ChemicalHydrogen PeroxideMutagenesis, Site-DirectedMagnetic Resonance SpectroscopyStructure-Activity RelationshipProtein Structure, TertiaryKineticsHydrogen SulfideComputer SimulationThermodynamicsCatalysisProtonsNuclear Magnetic Resonance, BiomolecularDisulfidesStatic ElectricitySolventsBase PairingProtein FoldingOxidation-ReductionMolecular Dynamics SimulationX-Ray DiffractionSubstrate SpecificityNucleic Acid ConformationHydrogen-Ion ConcentrationHistidineAmino Acid SubstitutionQuantum TheoryLigandsStereoisomerismCrystallizationSteroid IsomerasesTemperatureSolutionsCrystallographyKetosteroidsHydrophobic and Hydrophilic InteractionsMutationPeptidesEscherichia coliAsparaginePhotoreceptors, MicrobialSpectrophotometry, InfraredAspartic AcidSpectrum Analysis, RamanCysteineDeuterium Exchange MeasurementHydrogen CyanideRecombinant ProteinsProteinsHalorhodospira halophilaDimerizationComamonas testosteroniSpectroscopy, Fourier Transform InfraredBacterial ProteinsAmidesCircular DichroismProtein DenaturationDNABase SequenceMolecular Docking SimulationOxygenAmino AcidsCalorimetrySequence Homology, Amino AcidElectronsDental BondingEnzyme StabilityTyrosineChemistry, PhysicalDrug DesignOxidantsRibonuclease, PancreaticPhysicochemical PhenomenaAlanineGuanineIsomerismBiophysicsBiophysical PhenomenaCatalaseRhodobacter sphaeroidesEquileninSpectrophotometry, UltravioletSequence AlignmentThreonineBiocatalysisAdenine