title: Gene fusion during the evolution of the tryptophan operon in enterobacteriaceae.
mesh_terms: D000595:Amino Acid Sequence; D000878:Anthranilate Synthase / Q000235:genetics; D005075:Biological Evolution; D002874:Chromosome Mapping; D003062:Codon; D004755:Enterobacteriaceae / Q000235:genetics*; D004926:Escherichia coli / Q000235:genetics; D005796:Genes; D008970:Molecular Weight; D009876:Operon; D012706:Serratia marcescens / Q000235:genetics; D014364:Tryptophan / Q000235:genetics*
chemical_list: D003062:Codon; D014364:Tryptophan; D000878:Anthranilate Synthase