L-TRYPTOPHAN-PRODUCING MICROORGANISM AND PREPARATION OF L-TRYPTOPHAN USING SAID MICROORGANISM

摘要

PURPOSE:To provide the titled microorganism having high productivity of L- tryptophan, which is an anthranylic acid non-requiring strain prepared by the back mutation of a bacterial strain belonging to Bacillus genus, resistant to 5- fluorotryptophan and requiring anthranylic acid. CONSTITUTION:A bacterial strain having 5-fluorotryptophan-resistance, requiring anthranylic acid and belonging to Bacillus genus is made to be anthranylic acid non-requiring strain by back mutuation. An L-tryptophan-producing microbial strain, Bacillus amyloliquefaciens SD-43 (FERM-P No.7772) free from the activity of L-tryptophan to inhibit anthranylic acid synthetase can be prepared by this process.