C-source | Strain | Cbiomass (gDW kg-1) | Cxylose/maltose† (μM) | Yx/s (gDW gsubstrate-1) | Yx/C (gDWgcarbon-1) | qCO2 (mmol g-1 h-1) | qO2 (mmol g-1h-1) | RQ | qprotein-EC (mg g-1 h-1) | C-recovery (%) |
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Xylose | AB94-85 | 4.06 ± 0.07 | 233 ± 6 | 0.54 ± 0.02 | 1.35 ± 0.04 | 3.40 ± 0.11 | 3.36 ± 0.14 | 1.01 ± 0.02 | 0.68 ± 0.01 | 98 ± 2 |
| ABGT1026 | 3.96 ± 0.07 | 256 ± 18 | 0.53 ± 0.01 | 1.32 ± 0.03 | 3.41 ± 0.10 | 3.42 ± 0.10 | 1.00 ± 0.01 | 0.72 ± 0.02 | 101 ± 3 |
Maltose | AB94-85 | 3.68 ± 0.08* | 160 ± 5 | 0.52 ± 0.01 | 1.23 ± 0.03* | 2.92 ± 0.05* | 3.38 ± 0.14 | 0.87 ± 0.05* | 1.98 ± 0.28* | 101 ± 1 |
| ABGT1026 | 3.68 ± 0.12* | 158 ± 24 | 0.52 ± 0.02 | 1.23 ± 0.04* | 2.84 ± 0.17* | 3.57 ± 0.27 | 0.80 ± 0.10* | 1.69 ± 0.24* | 97 ± 2 |
- Steady state results of chemostat cultures with xylose or maltose as growth-limiting substrates. Standard deviations ( ± ) are given for mean values of triplicate independent steady state results. Cbiomass, dryweight biomass concentration; Cxylose/maltose, concentration of substrate (NB: maltose as glucose equivalents); Yxs, growth yield on substrate; YxC, growth yield on substrate carbon; qCO2, specific carbon dioxide evolution rate; qO2, specific oxygen consumption rate; RQ, respiratory quotient calculated as the ratio of CO2 production and O2 consumption rates; qprotein-EC, specific production rate of extracellular protein; C-recovery, carbon recovery. Two-tailed t-tests were used to evaluate significance (p < 0.05) of differences in each column (except substrate concentration and carbon recovery).
- * results are significantly different from unmarked results in the same column.
- † substrate concentration on maltose is given as concentration of glucose released into filtrate after incubation with α-glucosidase.