Twinning, MonozygoticGenetic DeterminismCloning, OrganismCloning, MolecularMolecular Sequence DataAmino Acid SequenceBase SequenceSequence Homology, Amino AcidDNA, ComplementaryModels, BiologicalSequence AlignmentEscherichia coliBiological ProductsRestriction MappingRecombinant ProteinsSequence Analysis, DNAGenes, BacterialRNA, MessengerDNAGene LibrarySequence Homology, Nucleic AcidBiological AssayGene Expression