Protein ConformationMolecular ConformationModels, MolecularStructure-Activity RelationshipProtein BindingAmino Acid SequenceMolecular Sequence DataProtein Structure, SecondaryBinding SitesStereoisomerismDrug DesignCrystallography, X-RayLinderaMolecular StructureProtein Structure, TertiaryLigandsKineticsCircular DichroismEpitopesPeptidesProtein FoldingThebaineThermodynamicsMagnetic Resonance SpectroscopyHeptanesOligopeptidesMolecular MimicryBicyclo CompoundsNucleic Acid ConformationNucleosidesProtein DenaturationModels, ChemicalMutagenesis, Site-DirectedPeptides, CyclicSpectrometry, FluorescenceAmino Acid SubstitutionHydrogen BondingMesylatesSolutionsCysteineRecombinant ProteinsFicainOligonucleotidesBinding, CompetitivePeptide FragmentsEnkephalin, LeucineAntibodies, MonoclonalEscherichia coliNuclear Magnetic Resonance, BiomolecularDimerizationCyclizationDeoxyriboseBiomimetic MaterialsMutationSpectrophotometry, UltravioletVitronectinSulfhydryl ReagentsDisulfidesPrionsSurface Plasmon ResonanceBase SequenceCatalysisAmyloidQuantitative Structure-Activity RelationshipHydrophobic and Hydrophilic InteractionsAmidesMembrane Transport ProteinsCell LineCarboxylic AcidsCricetinaeBicyclo Compounds, HeterocyclicAlkylationSubstrate SpecificityEndopeptidase KEthylmaleimideCHO CellsHIV Envelope Protein gp120TemperatureAmino Acid MotifsSequence Homology, Amino AcidNeutralization TestsNucleic Acid DenaturationProlineCalorimetryPrPC ProteinsProtein StabilitySpectrophotometry, InfraredCatalytic DomainProtein EngineeringCarrier ProteinsRecombinant Fusion ProteinsSpectrum Analysis, RamanMolecular Dynamics SimulationElectrophoresis, Polyacrylamide GelMutant ProteinsMutagenesisRadioligand AssayReceptors, Opioid, deltaHydrogen-Ion ConcentrationSymporters