Patent ID: 7300776
Filing Date: 2007-11-27
Classification: C12N,C12P

Abstract:
1. A method for producing an L-amino acid selected from the group consisting of L-tryptophan, L-phenylalanine, L-lysine, L-tyrosine, L-glutamic acid, L-histidine, L-cysteine, and L-proline, comprising culturing in a medium a modified Escherichia coli K12 strain, MG1655 strain, W3110 strain, or SV164 strain, wherein said strain has an ability to grow in a medium containing 20 mg/L of L-valine, and collecting said L-amino acid from the medium or the strain, wherein said strain is modified so as to produce active acetohydroxy acid synthase II, wherein said active acetohydroxy acid synthase II is encoded by the