| 摘要 |
FIELD: biotechnology, microbiology, amino acids. ^ SUBSTANCE: invention proposes the strain Enterobacter agglomerans/FERM BP-7207 that is able to metabolize the carbon source at pH value when L-glutamic acid precipitates in liquid cultural medium containing L-glutamic acid in the saturation concentration and the carbon source. Also, the strain is able to accumulate L-glutamic acid in the amount exceeding the amount that corresponds to its saturation concentration in liquid cultural medium at this pH value. Also, invention relates to a method for preparing L-glutamic acid by fermentation that involves culturing this microorganism in liquid cultural medium wherein pH value is brought about to the value when L-glutamic acid precipitates to prepare and accumulate L-glutamic acid and to precipitate L-glutamic acid in this cultural medium. The proposed microorganism is prepared by addition of a sample comprising microorganisms to acid cultural medium containing L-glutamic acid in the saturation concentration and the carbon source followed by removal of strain that is able to metabolize this carbon source. Invention provides preparing L-glutamic acid with the high degree of effectiveness. ^ EFFECT: improved preparing method, valuable properties of strain. ^ 20 cl, 9 dwg, 3 tbl, 8 ex |
