Ajinomoto Co., Ltd.

Haruo Uchibori

Takayasu Tsuchida

Hiroshi Takeuchi

Mitsuyoshi Seki

Naoki Katsurada

Takeshi Suzuki

Hitoshi Enei

Hiroki Kawashima

Yoshitaka Nishimoto

Noboru Ohtsuka

Noboro Ohtsuka

Culturing an L-amino acid producing microorganism belonging to the genus Brevibacterium or Corynebacterium and having a resistance to a peptide containing glutamic acid or aspartic acid gives L-amino acids in high yield.

Process for producing L-amino acids by fermentation

Culturing an L-amino acid producing microorganism belonging to the genus Brevibacterium or corynebacterium and having a resistance to a dipeptide containing glutamic acid or aspartic acid gives L-amino acids in high yield.

Process for producing L-amino acids by fermentation employing a

L-arginine is produced in high yields by culturing a microorganism of the genus Brevibacterium or the genus Cornyebacterium, which is resistant to a compound of the formula X-guanidine, wherein X is an aliphatic group or derivative thereof. The preferred microorganisms are Brevibacterium flavum FERM BP-2227 and Corynebacterium glutamicum FERM BP-2228.

Process for producing l-arginine by fermentation with brevibacterium or

A process for the production of L-glutamic acid comprising growing microorganisms belonging to the genera Brevibacterium and Corynebacterium that are resisted to prumycin.

Process for producing L-glutamic acid

A method for producing L-threonine by fermentation which comprises culturing in a culture medium a microorganism of the genus Brevibacterium or Corynebacterium which is resistant to mycophenolic acid and is capable of producing L-threonine, accumulating L-threonine in the medium, and then recovering the L-threonine accumulated therein.

Method for producing L-threonine by fermentation

A process for producing L-ornithine by fermentation which comprises culturing a L-ornithine-producing microorganism is disclosed. The microorganism used belongs to the genus Brevibacterium, Corynebacterium, or Arthrobacter, has auxotrophy for arginine and/or citrulline, and has resistance to microphenolic acid and/or ornithinol.

Process and microorganism for producing L-ornithine by Corynebacterium,

A process for producing L-valine by fermentation which comprises culturing in a liquid culture medium an L-valine producing microorganism which belongs to the genus Brevibacterium or Corynebacterium and which is resistant to a polyketide, and then recovering L-valine accumulated in said culture medium.

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Kawasaki, Japan

Haruo Uchibori