TABLE 1.
Yields of metabolites produced by G. xylinus on different carbohydrate sources
| Carbohydrate source | Yield of metabolitea
|
C balance | ||
|---|---|---|---|---|
| (Keto)-Gluconatesb | EPSc | CO2 | ||
| Glucose | 0.84 ± 0.03 | 0.09 ± 0.01 | 0.12 ± 0.02 | 1.05 ± 0.06 |
| Sucrose | 0.21 ± 0.01 | 0.46 ± 0.02 | 0.36 ± 0.02 | 1.03 ± 0.07 |
| Fructose | 0.00 ± 0.00 | 0.35 ± 0.01 | 0.65 ± 0.01 | 1.00 ± 0.02 |
a
Values for yields are given as C-mol/C-mol of total substrates.
b
(Keto)-Gluconate represents the sum of the yields of gluconic acid, 2-ketogluconic acid, and 5-ketogluconic acid.
c
EPS represents the total amount of soluble EPS (gluconacetan and levan) harvested from fermentation broth. During growth on sucrose, it represents 75% gluconacetan and 25% levan. No levan was measured during growth on glucose or fructose. Regardless of the source of carbohydrate, no cellulose production was measured.