Isotope LabelingIsotopesPeptidesIndicators and ReagentsNitrogen IsotopesOxygen IsotopesCarbon IsotopesPeptide FragmentsPeptide LibraryAntimicrobial Cationic PeptidesSulfhydryl ReagentsPeptides, CyclicZinc IsotopesSulfur IsotopesPeptide MappingDeuteriumAmino Acid SequenceOligopeptidesKineticsMass SpectrometryIron IsotopesMolecular Sequence DataNatriuretic Peptide, BrainProtein BindingStrontium IsotopesBinding SitesChromatography, High Pressure LiquidCross-Linking ReagentsVasoactive Intestinal PeptideModels, MolecularProtein ConformationCell-Penetrating PeptidesCalcitonin Gene-Related PeptideAmino AcidsRadioisotope Dilution TechniquePeptide BiosynthesisPeptide YYPeptide Nucleic AcidsStructure-Activity RelationshipProtein Structure, SecondaryBase SequenceNatriuretic Peptide, C-TypeEpitopesNatriuretic PeptidesHydrogen-Ion ConcentrationSubstrate SpecificityTrypsinPeptide HydrolasesMagnetic Resonance SpectroscopyGastrin-Releasing PeptideEscherichia coliCell LineReagent StripsReceptors, Formyl PeptideTandem Mass Spectrometry