Twinning, MonozygoticGenetic DeterminismCloning, OrganismCloning, MolecularClone CellsMolecular Sequence DataBase SequenceAmino Acid SequenceDNA, ComplementarySequence Homology, Amino AcidSequence Analysis, DNADNASequence Homology, Nucleic AcidSequence AlignmentRNA, MessengerEscherichia coliGenes, BacterialPolymerase Chain ReactionChromosome MappingPlasmidsBlotting, SouthernBlotting, NorthernNucleic Acid HybridizationPhylogenyRecombinant ProteinsGene ExpressionGenesRestriction MappingCell LineDNA, BacterialDNA Primers