title: Amino acid replacements of the glutamic acid residue at position 48 in the tryptophan synthetase A protein of Escherichia coli.
mesh_terms: D000595:Amino Acid Sequence; D003433:Crosses, Genetic; D004926:Escherichia coli; D005815:Genetic Code; D005827:Genetics, Microbial; D005971:Glutamates / Q000032:analysis*; D008025:Ligases / Q000032:analysis; D008715:Methionine / Q000032:analysis; D008967:Molecular Biology; D009154:Mutation; D013489:Suppression, Genetic; D014364:Tryptophan / Q000032:analysis; D014443:Tyrosine / Q000032:analysis; D014633:Valine / Q000032:analysis
chemical_list: D005971:Glutamates; D014443:Tyrosine; D014364:Tryptophan; D008715:Methionine; D008025:Ligases; D014633:Valine