Twinning, MonozygoticGenetic DeterminismCloning, OrganismCloning, MolecularClone CellsMolecular Sequence DataBase SequenceAmino Acid SequenceDNA, ComplementarySequence Homology, Amino AcidSequence Analysis, DNADNASequence Homology, Nucleic AcidSequence AlignmentRNA, MessengerEscherichia coliPolymerase Chain ReactionGenes, BacterialChromosome MappingPlasmidsRecombinant ProteinsBlotting, SouthernBlotting, NorthernNucleic Acid HybridizationGene ExpressionPhylogenyGenesCell LineRestriction MappingDNA, BacterialDNA Primers