The inhibitory effect of 5-methyltryptophan on growth of Lactobacillus plantarum 8293 is prevented competitively by anthranilic acid, but both indole and tryptophan at relatively low concentrations reverse the toxicity of the methyltryptophan noncompetiti~ ely.~ Among possible explanations for these results, including the possibility that 5-methyltryptophan inhibits the conversion of anthranilic acid to indole, one alternative explanation was ...
