title: Genetic transcription of the tryptophan operon in Escherichia coli.
mesh_terms: D004269:DNA, Bacterial / Q000096:biosynthesis*; D004926:Escherichia coli / Q000378:metabolism*; D005827:Genetics, Microbial; D012329:RNA, Bacterial / Q000096:biosynthesis; D014364:Tryptophan / Q000096:biosynthesis*
chemical_list: D004269:DNA, Bacterial; D012329:RNA, Bacterial; D014364:Tryptophan