Embryo ResearchCloning, OrganismSheepCloning, MolecularMammalsSheep DiseasesClone CellsMolecular Sequence DataSheep, DomesticBase SequenceAmino Acid SequenceDNA, ComplementarySequence Homology, Amino AcidSequence Analysis, DNASequence AlignmentPhylogenyDNARNA, MessengerSequence Homology, Nucleic AcidSpecies SpecificityPolymerase Chain ReactionEscherichia coliChromosome MappingGenes, BacterialSheep, BighornGene ExpressionRecombinant ProteinsBlotting, NorthernPlasmidsBlotting, SouthernCell LineNucleic Acid HybridizationGenesDNA PrimersDNA, BacterialGoatsRestriction MappingMutationCattleGene LibraryBiological EvolutionDNA Restriction EnzymesJaagsiekte sheep retrovirusTranscription, GeneticOpen Reading FramesEvolution, MolecularGenomic LibraryTissue DistributionMultigene FamilyPhenotypeGene Expression RegulationTransfectionDNA, RecombinantGenetic VectorsGenetic VariationTime FactorsOrgan SpecificityScrapieBacterial ProteinsConserved SequenceMolecular WeightCosmidsLiverChickensFetusChromosomes, Artificial, BacterialMarsupialiaCarrier ProteinsRodentiaBrainPregnancyGenetic Complementation TestReverse Transcriptase Polymerase Chain ReactionKineticsIn Situ HybridizationGenotypeSwineRNARabbitsGene Expression Regulation, DevelopmentalExonsMembrane ProteinsSequence HomologyCricetinaeCells, CulturedDogsModels, BiologicalOligonucleotide ProbesElectrophoresis, Polyacrylamide GelTranscription FactorsPromoter Regions, GeneticRecombinant Fusion ProteinsIntronsGoat DiseasesBirdsAnimals, WildArtiodactylaSequence AnalysisRepetitive Sequences, Nucleic AcidMice, Inbred C57BL