A new synthesis method for 15NL-tryptophan by yeast fermentation using glucose as carbon source, ammonium sulphate as nitrogen source, and 15N anthranilic acid as a precursor is described.

• 摘要 以葡萄糖为碳源，硫酸铵为氮源，15N邻氨基苯甲酸为前体物，利用酵母发酵合成15NL-色氨酸，是合成15NL-色氨酸的一种新方法。