Mass SpectrometrySpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationPeptidesPeptide MappingTandem Mass SpectrometrySpectrometry, Mass, Electrospray IonizationElectrophoresis, Gel, Two-DimensionalProteomicsProteomeChromatography, LiquidAmino Acid SequenceMolecular Sequence DataGas Chromatography-Mass SpectrometryPeptide FragmentsChromatography, High Pressure LiquidHemoglobin JProteinsSequence Analysis, ProteinTrypsinCalibrationBacterial ProteinsMolecular WeightSpectrometry, Mass, Secondary IonElectrophoresis, Polyacrylamide GelPeptide LibraryProtein Processing, Post-TranslationalDatabases, ProteinProtein BindingSpectrometry, Mass, Fast Atom BombardmentAntimicrobial Cationic PeptidesPeptides, CyclicAlgorithmsReproducibility of ResultsSequence Homology, Amino AcidRecombinant ProteinsSoftwareCattleOligopeptidesProtein Structure, TertiarySequence AlignmentMagnetic Resonance SpectroscopyMolecular StructureIsotope LabelingEscherichia coliDeuterium Exchange MeasurementSubstrate SpecificityBase SequenceBlotting, WesternModels, MolecularCell LinePhosphorylationProtein ConformationReference StandardsBinding SitesSensitivity and SpecificityMembrane ProteinsProtein IsoformsIonsKineticsDeuteriumCarbohydrate SequenceSolid Phase ExtractionNatriuretic Peptide, BrainLimit of DetectionBody Mass IndexCell Line, TumorAmino AcidsIndicators and ReagentsChromatography, Thin LayerFourier AnalysisMetabolomicsHydrolysisGlycosylationSubstance Abuse DetectionProtein Structure, SecondaryChromatography, GasVasoactive Intestinal PeptideGene Expression Regulation, BacterialCalcitonin Gene-Related PeptidePeptide BiosynthesisCyclotronsCell-Penetrating PeptidesIsotopesPeptide HydrolasesPolysaccharidesAnalytic Sample Preparation MethodsTime FactorsStructure-Activity RelationshipIsomerismCloning, MolecularBiological MarkersPeptide YYOxidation-ReductionProtein PrecursorsChromatography, Reverse-PhaseOligosaccharidesPeptide SynthasesEpitopesMetabolomePeptide Nucleic Acids