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The second stage of the two‐stage fermentation: effect of pH on GABA (mg·L−1) production
| Day | 37°C, initial concentration of l‐MSG 405 mg·L−1 and various pH values | ||||
|---|---|---|---|---|---|
| 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | |
| 1 | 56.2 ± 8 | 66.7 ± 9 | 90.3 ± 8 | 84.9 ± 10 | 70.2 ± 6 |
| 2 | 176.4 ± 17 | 184.3 ± 13 | 207.2 ± 12 | 173.6 ± 21 | 168.7 ± 23 |
| 3 | 213.1 ± 19 | 266.4 ± 17 | 303.7 ± 26 | 254.7 ± 27 | 226.2 ± 25 |
| 4 | 191.5 ± 17 | 239 ± 22 | 286.4 ± 21 | 239.4 ± 19 | 212.6 ± 33 |
