title: Polarity in the tryptophan operon of E. coli.
mesh_terms: D002499:Centrifugation, Density Gradient; D002874:Chromosome Mapping; D003090:Coliphages; D004279:DNA, Viral; D004926:Escherichia coli / Q000201:enzymology*; D005796:Genes; D005815:Genetic Code; D006836:Hydro-Lyases / Q000096:biosynthesis; D008025:Ligases / Q000096:biosynthesis; D009154:Mutation; D009691:Nucleic Acid Denaturation; D012329:RNA, Bacterial / Q000096:biosynthesis*; D012333:RNA, Messenger / Q000096:biosynthesis*; D012270:Ribosomes; D014161:Transduction, Genetic; D014364:Tryptophan / Q000096:biosynthesis*
chemical_list: D004279:DNA, Viral; D012329:RNA, Bacterial; D012333:RNA, Messenger; D014364:Tryptophan; D006836:Hydro-Lyases; D008025:Ligases