| 摘要 |
PURPOSE:To prepare L-phenylalanine efficiently without using an expensive amino group donor, by treating phenylpyruvic acid with a bacterium in the presence of an energy source, an inorganic ammonium compound etc. CONSTITUTION:A bacterium belonging to the genus Brevibacterium, Bacillus, etc., capable of converting phenylpyruvic acid into L-phenylalanine, is cultivated in a medium containing an energy source such as saccharide, alcohol, or organic acid, an inorganic ammonium compound such as ammonia water, ammonium salt, etc. or urea and oxygen in the presence of phenylpyruvic acid, or phenylpyruvic acid is treated with a culture of the bacterium or a treated material of it in the presence of the energy, etc. |
