Nonsense codons and polarity in the tryptophan operon.
D001426:Bacterial Proteins / Q000096:biosynthesis*; D002874:Chromosome Mapping; D004794:Enzyme Repression; D004926:Escherichia coli / Q000378:metabolism*; D005796:Genes; D005815:Genetic Code; D006836:Hydro-Lyases / Q000096:biosynthesis; D008025:Ligases / Q000096:biosynthesis; D008967:Molecular Biology; D009154:Mutation; D012333:RNA, Messenger / Q000378:metabolism; D012270:Ribosomes / Q000378:metabolism; D014166:Transferases / Q000096:biosynthesis; D014364:Tryptophan / Q000096:biosynthesis*
D001426:Bacterial Proteins; D012333:RNA, Messenger; D014364:Tryptophan; D014166:Transferases; D006836:Hydro-Lyases; D008025:Ligases