Twinning, MonozygoticGenetic DeterminismCloning, OrganismCloning, MolecularClone CellsMolecular Sequence DataBase SequenceAmino Acid SequenceDNA, ComplementarySequence Homology, Amino AcidDNASequence Analysis, DNASequence Homology, Nucleic AcidRNA, MessengerSequence AlignmentPolymerase Chain ReactionNucleic Acid HybridizationEscherichia coliChromosome MappingGenes, BacterialGenesBlotting, SouthernCell LinePlasmidsPhylogenyBlotting, NorthernGene ExpressionDNA, BacterialRecombinant ProteinsDNA Restriction EnzymesDNA PrimersGenomic LibraryMutationDNA, RecombinantSpecies SpecificityTranscription, GeneticOpen Reading FramesTransfectionChromosomes, Artificial, BacterialCosmidsRestriction MappingGenetic VectorsPhenotype