Embryo ResearchCloning, OrganismSheepSheep DiseasesSheep, DomesticCloning, MolecularMolecular Sequence DataBase SequenceAmino Acid SequenceSheep, BighornJaagsiekte sheep retrovirusGoatsSequence Homology, Amino AcidGenes, BacterialEscherichia coliPlasmidsScrapieDNA, ComplementaryRestriction MappingSequence Analysis, DNASequence AlignmentRecombinant ProteinsRNA, MessengerDNA Restriction EnzymesSequence Homology, Nucleic AcidGenesDNA, BacterialFetusGoat DiseasesCattleNucleic Acid HybridizationPulmonary Adenomatosis, OvineWoolPolymerase Chain ReactionDNADNA, RecombinantBacterial ProteinsTranscription, GeneticGene ExpressionChromosome MappingPregnancyRumenMutationPhylogenyBlotting, SouthernCell LineDNA PrimersGenetic Complementation TestErythrocytesLymph