Table 1.
Level of variables chosen for experimental design
| Symbol | Variable | Coded level | Unit | ||
|---|---|---|---|---|---|
| −1 | 0 | 1 | |||
| A | Pro | 0.04 | 0.12 | 0.20 | g/L |
| B | Gln | 0.04 | 0.12 | 0.20 | g/L |
| C | Pro | 0.04 | 0.12 | 0.20 | g/L |
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