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Isolation of a Tryptophan - Overproducing Strain Generated by EMS Mutagenesis of Candida rugosa
Sunhye Kim,Yumi Ha,Hyoungjoon Youm,Gilhwan An,Bongduk Lee,Misun Won,Kyung Bin Song 한국식품영양과학회 2004 Preventive Nutrition and Food Science Vol.9 No.2
To isolate a mutant strain which overproduces tryptophan, mutants of Candida rugosa were screened after EMS (ethyl methane sulfonate) mutagenesis. Fluorotryptophan, a tryptophan analogue, was used for selection of a tryptophan-overproducing mutant after mutagenesis. Among 50 mutants, several candidates were selected based on intracellular tryptophan content. Amino acid analysis results showed that C3 was the best strain because it had the highest amount of tryptophan among the mutants.