Process for producing amino acids.

摘要

Productivity of L-lysine, L-threonine and L-isoleucine in coryneform bacteria is enhanced by transforming a microorganism of the genus Corynebacterium or Brevibacterium with a plasmid constructed by inserting a DNA fragment containing the gene responsible for the synthesis of aspartate semialdehyde dehydrogenase or aspartate aminotransferase in a microorganism of Corynebacterium or Brevibacterium into a vector. The transformant produces enhanced quantities of the desired amino acid upon culturing in a medium.