TABLE 3.
Summary of product formation in bioreactor experiments
| Fermentation characteristic | Strain 824(pIMP1) (control)a | Strain 824(pRD4)a | Strain 824(pRD1)a |
|---|---|---|---|
| No. of expt | 2 | 2 | 4 |
| Growth rate (h−1) | 0.51 ± 0.01 | 0.53 ± 0.02 | 0.48 ± 0.04 |
| Maximum OD600 | 7.0 ± 0.18 | 7.1 ± 0.18 | 5.00 ± 0.3 |
| Ethanol concn (mM) | 11 ± 0.75 | 14 ± 1.0 | 5 ± 0.3 |
| Acetone concn (mM) | 50 ± 4.5 | 75 ± 14.5 | 2 ± 0.2 |
| Butanol concn (mM) | 114 ± 3 | 154 ± 20 | 28 ± 0.6 |
| Peak acetate concn (mM) | 106 ± 15.5 | 132 ± 4 | 98 ± 3 |
| Final acetate concn (mM) | 106 ± 15.5 | 126 ± 6 | 96 ± 3 |
| Peak butyrate concn (mM) | 135 ± 11 | 181 ± 4 | 123 ± 8 |
| Final butyrate concn (mM) | 81 ± 8 | 111 ± 10 | 117 ± 5 |
| Acetoin concn (mM) | 5 ± 0.65 | 5 ± 0.25 | 15 ± 1.0 |
| Lactate concn (mM) | <1 | <1 | 105 ± 16 |
a
Mean ± standard error of the mean.