Cloning, OrganismEmbryo ResearchClone CellsNuclear Transfer TechniquesCloning, MolecularStem CellsMolecular Sequence DataCell LineBase SequenceHistiocytoma, Benign FibrousAmino Acid SequenceRhabdomyosarcomaDNA, ComplementaryCell Transformation, ViralAntigens, SurfaceSequence Homology, Amino AcidCell DivisionKaryotypingNeoplasms, ExperimentalMammary Neoplasms, ExperimentalCytotoxicity, ImmunologicCells, CulturedTumor Cells, CulturedGenes, BacterialSequence AlignmentEscherichia coliSequence Homology, Nucleic AcidDNARNA, MessengerSequence Analysis, DNARestriction MappingCell DifferentiationPlasmidsRecombinant ProteinsPolymerase Chain ReactionBlotting, Southern