Mass SpectrometryGas Chromatography-Mass SpectrometrySpectrometry, Mass, Electrospray IonizationTandem Mass SpectrometryChromatography, High Pressure LiquidSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationMagnetic Resonance SpectroscopyChromatography, Liquid3,4-MethylenedioxyamphetamineMolecular StructureSpectrophotometry, InfraredMetabolomicsSpectrophotometry, UltravioletProteomicsReproducibility of ResultsAlgorithmsMolecular Sequence DataChromatography, GasAmino Acid SequenceFourier AnalysisMucoralesSensitivity and SpecificityIsomerismSpectrometry, Mass, Fast Atom BombardmentSpectrum AnalysisIon ChannelsComplex MixturesCholestenesCholestenonesChromatography, Thin LayerChemistrySoftwarePeptidesChemical PhenomenaAlkanesBiotransformationIndicators and ReagentsForensic MedicineProteomeN-Methyl-3,4-methylenedioxyamphetamineKineticsPeptide MappingMolecular ConformationModels, ChemicalOxidation-ReductionStereoisomerismVolatile Organic CompoundsGlycolsBody Mass IndexPeptide FragmentsDatabases, FactualEstersIonsCalibrationMicrosomes, LiverReference StandardsProteinsCattleSpectrophotometryIon TransportMolecular WeightGlycosidesHydrogen-Ion ConcentrationIon Channel GatingLimit of DetectionTrypsinCholestanolsModels, MolecularSpectroscopy, Fourier Transform InfraredEpoxy CompoundsSequence Analysis, ProteinPharmaceutical PreparationsBinding SitesHeavy IonsTime FactorsHydrolysisStreptomycesEscherichia coliDatabases, ProteinSignal Processing, Computer-AssistedBase SequenceChromatographyImage Processing, Computer-AssistedProtein Processing, Post-TranslationalSpectrometry, Mass, Secondary IonCytochrome P-450 Enzyme SystemCarbohydrate SequenceArtificial IntelligenceSpecies SpecificityIsotope LabelingRecombinant ProteinsSpectrometry, FluorescenceAnti-Bacterial AgentsStructure-Activity RelationshipImage Interpretation, Computer-AssistedLipidsPolymerase Chain ReactionSpectral KaryotypingFluorescent DyesModels, Biological