title: Analysis of spontaneous deletions and gene amplification in the lac region of Escherichia coli.
mesh_terms: D001483:Base Sequence; D002872:Chromosome Deletion; D002876:Chromosomes, Bacterial / Q000502:physiology*; D004926:Escherichia coli / Q000235:genetics*; D005784:Gene Amplification; D005798:Genes, Bacterial; D007763:Lac Operon; D009154:Mutation