title: Selection for new amino acids at position 211 of the tryptophan synthetase alpha chain of Escherichia coli.
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D003062:Codon; D004926:Escherichia coli / Q000201:enzymology*; D005815:Genetic Code; D009154:Mutation; D010442:Peptide Chain Initiation, Translational; D014161:Transduction, Genetic; D014367:Tryptophan Synthase / Q000032:analysis*
chemical_list: D003062:Codon; D014367:Tryptophan Synthase