Isotope LabelingIsotopesPeptidesNitrogen IsotopesOxygen IsotopesCarbon IsotopesPeptide FragmentsPeptide LibraryAntimicrobial Cationic PeptidesPeptides, CyclicZinc IsotopesSulfur IsotopesDeuteriumPeptide MappingOligopeptidesKineticsAmino Acid SequenceIron IsotopesMass SpectrometryNatriuretic Peptide, BrainMolecular Sequence DataStrontium IsotopesProtein BindingModels, MolecularVasoactive Intestinal PeptideCalcitonin Gene-Related PeptideProtein ConformationCell-Penetrating PeptidesChromatography, High Pressure LiquidBinding SitesRadioisotope Dilution TechniquePeptide BiosynthesisPeptide YYPeptide Nucleic AcidsModels, BiologicalAmino AcidsProtein Structure, SecondaryNatriuretic Peptide, C-TypeTime FactorsNatriuretic PeptidesBase SequenceStructure-Activity RelationshipMagnetic Resonance SpectroscopyGastrin-Releasing PeptideModels, ChemicalReceptors, Formyl PeptidePeptide HydrolasesPeptide SynthasesPeptide PHI