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Effect of different nitrogen sources on PGA synthesis and GGT activity in cultures of B. licheniformis S173
| Nitrogen source (4 g/liter) | Growth (OD660) | PGA (μg/ml) | GGT (U/ml) |
|---|---|---|---|
| NH4Cl | 3.7 | 1,270 | 13.4 |
| (NH4)2SO4 | 3.7 | 1,060 | 10.9 |
| NH4NO3 | 4.8 | 1,180 | 7.9 |
| NaNO3 | 1.0 | 50 | 3.1 |
| Arginine | 2.8 | 790 | 22.4 |
| Aspartate | 3.0 | 580 | 35.3 |
| Glutamine | 2.9 | 910 | 10.8 |
| Glutamate | 2.5 | 0 | 12.1 |
| (NH4)2SO4 + glutamate | 2.7 | 0 | 0 |
| Glutamine + glutamate | 4.3 | 370 | 13.3 |
