title: Thr region between the operator and first structural gene of the tryptophan operon of Escherichia coli may have a regulatory function.
mesh_terms: D001426:Bacterial Proteins / Q000096:biosynthesis; D002869:Chromosome Aberrations; D004269:DNA, Bacterial; D004926:Escherichia coli / Q000201:enzymology / Q000378:metabolism; D005796:Genes; D005809:Genes, Regulator; D005815:Genetic Code; D009154:Mutation; D009693:Nucleic Acid Hybridization; D009876:Operon; D012333:RNA, Messenger / Q000096:biosynthesis; D011995:Recombination, Genetic; D014364:Tryptophan
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D012333:RNA, Messenger; D014364:Tryptophan