Embryo ResearchCloning, OrganismSheepClone CellsSheep DiseasesSheep, DomesticCloning, MolecularMolecular Sequence DataBase SequenceSheep, BighornAmino Acid SequenceJaagsiekte sheep retrovirusGoatsDNA, ComplementaryDNAScrapieSequence Analysis, DNARNA, MessengerPolymerase Chain ReactionSequence Homology, Nucleic AcidNucleic Acid HybridizationCell LineFetusGoat DiseasesPulmonary Adenomatosis, OvineCattleGenesWoolSequence Homology, Amino AcidPhylogenySpecies SpecificityChromosome MappingChromosomes, Artificial, BacterialRumenBlotting, SouthernPregnancyGenomic LibraryDNA, BacterialBlotting, NorthernErythrocytesT-LymphocytesSequence AlignmentPlasmidsDNA Restriction EnzymesLymphTransfectionGenetic VariationGene Expression