title: Level of tryptophan messenger RNA in Escherichia coli.
mesh_terms: D001426:Bacterial Proteins / Q000032:analysis; D001665:Binding Sites; D003090:Coliphages; D004279:DNA, Viral / Q000302:isolation & purification; D004926:Escherichia coli; D008025:Ligases; D009154:Mutation; D009693:Nucleic Acid Hybridization; D009876:Operon; D012329:RNA, Bacterial / Q000032:analysis / Q000302:isolation & purification; D012333:RNA, Messenger / Q000032:analysis*; D014316:Tritium; D014364:Tryptophan / Q000032:analysis*; D014498:Uracil
chemical_list: D001426:Bacterial Proteins; D004279:DNA, Viral; D012329:RNA, Bacterial; D012333:RNA, Messenger; D014316:Tritium; D014498:Uracil; D014364:Tryptophan; D008025:Ligases