EnkephalinsEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Enkephalin, LeucineEnkephalin, MethionineEnkephalin, D-Penicillamine (2,5)-Enkephalin, Leucine-2-AlaninePeptidesEndorphinsReceptors, OpioidReceptors, Opioid, muReceptors, Neurokinin-3Receptors, Opioid, deltaNeurokinin BNaloxoneEthylketocyclazocineTachykininsReceptors, TachykininPeptide FragmentsCyclazocineD-Ala(2),MePhe(4),Met(0)-ol-enkephalinSubstance PReceptors, Opioid, kappaNeurokinin ANarcotic AntagonistsMorphineOligopeptidesReceptors, Neurokinin-2Peptide LibraryDynorphinsAmino Acid SequencePeptides, CyclicAntimicrobial Cationic PeptidesAnalgesics, OpioidOpioid PeptidesRNA, Transfer, GlyMolecular Sequence DataCarboxypeptidase Hbeta-EndorphinProtein PrecursorsNaltrexoneBenzomorphansBenzeneacetamidesPeptide MappingGuinea PigsKineticsModels, MolecularProtein ConformationNeurokinin-1 Receptor AntagonistsDiprenorphineGlycineNarcoticsStructure-Activity RelationshipBinding SitesDose-Response Relationship, DrugProtein BindingVasoactive Intestinal PeptideNatriuretic Peptide, BrainEtorphineBase SequenceChromatography, High Pressure LiquidReceptors, Neurokinin-1Protein Structure, SecondaryNeprilysinBinding, CompetitiveAnalgesicsThiorphanCalcitonin Gene-Related PeptideCell-Penetrating PeptidesCattleCell LineAmino AcidsBrainMutagenesis, Site-DirectedAdrenal MedullaAmino Acid SubstitutionPeptide BiosynthesisMorphinansSomatostatinTioproninRecombinant ProteinsPeptide YYPiperidinesSubstrate SpecificityPeptide Nucleic AcidsIrisRats, Sprague-DawleyCarboxypeptidasesSequence Homology, Amino AcidMass SpectrometryNatriuretic Peptide, C-TypePyrrolidinesMutationProtein Structure, TertiaryAlanineIleumMagnetic Resonance SpectroscopyNatriuretic PeptidesChromaffin GranulesRats, Inbred StrainsEscherichia coli