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Experimental range and levels of the independent variables to optimize media components for protease production by Bacillus pumilus MP 27.
| Factors | Independent variables | Range and levels | ||
|---|---|---|---|---|
| -1 | 0 | 1 | ||
| A | Carbon source | 1 | 3 | 5 |
| B | Nitrogen source | 0.1 | 0.3 | 0.5 |
| C | Co factor | 0.1 | 0.3 | 0.5 |
| D | Surfactant | 0.1 | 0.3 | 0.5 |
