Cloning, OrganismNuclear Transfer TechniquesCloning, MolecularMammalsClone CellsMolecular Sequence DataBase SequenceAmino Acid SequenceDNA, ComplementarySequence Homology, Amino AcidRNA, MessengerGenesDNARickettsia prowazekiiNucleic Acid HybridizationMice, Inbred DBAEmbryo, MammalianOocytesMorulaCell LineDNA Restriction EnzymesBlastocystEmbryo TransferGene ExpressionEmbryonic DevelopmentHypertrophySequence AlignmentPlacentaSequence Analysis, DNAMice, Inbred C57BLTranscription, GeneticEscherichia coliSequence Homology, Nucleic AcidGenes, BacterialMice, Inbred StrainsPhylogenyMice, Inbred ICRGene Expression RegulationPlasmidsHydroxamic AcidsGene Expression Regulation, DevelopmentalCell NucleusPolymerase Chain ReactionRestriction MappingTransfectionRecombinant ProteinsChromosome MappingBlotting, SouthernDNA, BacterialBlotting, NorthernDNA PrimersMutationSpecies SpecificityGene Library