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Effect of glutamic acid from different sources on γ-PGA production.
| Precursors | γ-PGA (g/L) | Biomass (g/L) |
|---|---|---|
| Glutamic acid fermentation broth | 28.98 ± 0.38 | 9.25 ± 0.23 |
| Crude extract of glutamic acidafter isoelectric crystallization | 34.42 ± 0.32 | 12.42 ± 0.33 |
| Crude monosodium glutamate after crystallization | 34.25 ± 0.31 | 12.21 ± 0.28 |
| Control | 34.60 ± 0.32 | 12.51 ± 0.30 |
