Protein ConformationProtein Structure, SecondaryMolecular Sequence DataModels, MolecularAmino Acid SequenceCircular DichroismMagnetic Resonance SpectroscopyNucleic Acid ConformationDNABase SequencePeptidesProtein Structure, TertiaryBinding SitesProtein BindingProtein FoldingMolecular ConformationCrystallography, X-RayThermodynamicsHelix (Snails)Hydrogen BondingKineticsProteinsNuclear Magnetic Resonance, BiomolecularStructure-Activity RelationshipMutationSpectrometry, FluorescenceMutagenesis, Site-DirectedSolutionsDeuterium Exchange MeasurementRecombinant ProteinsProtein Structure, QuaternarySequence Homology, Amino AcidEscherichia coliProtein DenaturationLigandsDimerizationTemperatureModels, ChemicalHydrogen-Ion ConcentrationOptical Rotatory DispersionAmino Acid SubstitutionSequence AlignmentHydrophobic and Hydrophilic InteractionsStatic ElectricityTryptophanComputer SimulationPeptide FragmentsBacteriorhodopsinsBacterial ProteinsSpectroscopy, Fourier Transform InfraredMolecular Dynamics SimulationSilica GelMyoglobinalpha 1-AntitrypsinSpectrophotometry, InfraredMolecular StructureMacromolecular SubstancesProtein StabilitySpectrum Analysis, RamanCattleSpectrophotometry, UltravioletCatalysisWaterBiophysicsBiophysical PhenomenaCysteineAmino AcidsCrystallizationRecombinant Fusion ProteinsMembrane ProteinsElectrophoresis, Polyacrylamide GelSubstrate SpecificityAnilino NaphthalenesulfonatesCell MembraneApoproteinsAmino Acid MotifsPoint MutationCatalytic DomainCloning, MolecularSolventsReceptors, Adrenergic, alphaCell LineHydrogenMuramidaseGuanidineHypoxia-Inducible Factor 1, alpha SubunitPrionsAlgorithmsCryoelectron MicroscopyModels, BiologicalCrystallographyTrypsinIntracellular Calcium-Sensing ProteinsSchiff BasesX-Ray DiffractionConserved SequenceSequence Analysis, ProteinProtein MultimerizationCarrier ProteinsEpitopes