Hybrid CellsHybridization, GeneticCell FusionEnkephalin, Leucine-2-AlanineNeuroblastomaChromosome MappingKaryotypingCell LineChromosomes, Human, 16-18Chromosomes, Human, 6-12 and XMolecular Sequence DataBase SequenceGliomaEnkephalin, LeucineGenesNucleic Acid HybridizationChromosomesReceptors, OpioidCloning, MolecularClone CellsAmino Acid SequenceCricetinaeSasaL Cells (Cell Line)ChimeraMutationChromosomes, Human, 4-5Genetic LinkagePhenotypeChromosome BandingChromosomes, Human, 13-15Chromosomes, Human, 19-20Hypoxanthine PhosphoribosyltransferaseEtorphineKineticsSpecies SpecificityEscherichia coliFibroblastsGenetic MarkersHybrid VigorChromosomes, Human, 1-3Lesch-Nyhan SyndromeRestriction MappingX ChromosomeTranscription, GeneticHybridomasSex ChromosomesDNAGenotypeDNA Restriction EnzymesAllelesChromosomes, Human, 21-22 and YRNA, MessengerCricetulusNeoplasms, ExperimentalModels, GeneticParainfluenza Virus 1, HumanPlasmidsChromosomes, Human, Pair 11Blotting, SouthernGenes, BacterialGene Expression RegulationRadiation Hybrid MappingReceptors, Opioid, deltaTumor Cells, CulturedCell Transformation, NeoplasticChromosomes, HumanBucladesinePolymerase Chain ReactionAntigens, SurfaceGenetic VariationGenetic Complementation TestCrosses, GeneticGlucose-6-Phosphate IsomeraseTeratomaEnkephalin, MethionineDiploidySequence Homology, Nucleic AcidTransfectionMorphinansAdenylate Cyclase ToxinSequence Homology, Amino Acid