EnkephalinsEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Enkephalin, LeucineEnkephalin, MethionineEnkephalin, D-Penicillamine (2,5)-Enkephalin, Leucine-2-AlanineEndorphinsReceptors, OpioidReceptors, Opioid, muReceptors, Neurokinin-3Receptors, Opioid, deltaNeurokinin BNaloxoneEthylketocyclazocineTachykininsReceptors, TachykininCyclazocineD-Ala(2),MePhe(4),Met(0)-ol-enkephalinReceptors, Opioid, kappaSubstance PNeurokinin ANarcotic AntagonistsMorphineReceptors, Neurokinin-2RNA, Transfer, PheDynorphinsAnalgesics, OpioidRNA, Transfer, GlyCarboxypeptidase HBenzomorphansBenzeneacetamidesNaltrexoneOpioid Peptidesbeta-EndorphinGuinea PigsAmino Acid SequencePhenylalanineDiprenorphineMolecular Sequence DataNeurokinin-1 Receptor AntagonistsNarcoticsOligopeptidesGlycineEtorphineThiorphanReceptors, Neurokinin-1Protein PrecursorsAnalgesicsKineticsMutagenesis, Site-DirectedPeptide FragmentsDose-Response Relationship, DrugAlanineModels, MolecularNeprilysinMorphinansTioproninAmino Acid SubstitutionStructure-Activity RelationshipAdrenal MedullaPiperidinesIrisBinding SitesProtein ConformationPyrrolidinesPeptidesBrainChromaffin GranulesSomatostatinIleumAminolevulinic AcidGlobus PallidusMutationBinding, CompetitiveDrug ToleranceDihydromorphineCarboxypeptidasesVas DeferensRats, Inbred StrainsBase SequenceRats, Sprague-DawleyInjections, IntraventricularBenzamidesInjections, SpinalProtease InhibitorsCorpus StriatumBenzylidene CompoundsCattleMyenteric PlexusNeuronsLocus CoeruleusAmino AcidsRadioligand AssaySubstrate SpecificityNeurotransmitter AgentsMorphine DerivativesProtein BindingRecombinant ProteinsNeuroblastomaGalanin