Table 3.

Carbon balances after fermentation of 50 g of xylose/litera

StrainAmt of C (mmol) (mean ± SD) from:Carbon recovery (%)Yieldethanol/xylose (mmol of C from ethanol/mmol of C from xylose) (mean ± SD)
Xylose (substrate)EthanolXylitolGlycerolAcetic acidCO2b
CEN.PK2-1C36 ± 3NDc 20 ± 10.62 ± 0.073.8 ± 0.031.9750
TMB310137 ± 4ND21 ± 50.52 ± 0.083.2 ± 0.011.6720
TMB310331 ± 7ND16 ± 40.27 ± 0.053.6 ± 0.031.8700
YUSM1009a21 ± 4ND10 ± 11.2 ± 0.023.0 ± 0.041.5750
TMB310242 ± 411.6 ± 1.113 ± 11.6 ± 0.023.3 ± 0.037.5880.28 ± 0.02
TMB310420 ± 5ND6.1 ± 10.68 ± 0.012.6 ± 0.031.3540
  • a Values are millimoles of C consumed or produced after 70 h, and they represent average values of fermentation based on triplicate experiments.

  • b 1 mmol of C from CO2 is assumed to be formed for every 2 mmol of C from ethanol and acetic acid.

  • c ND, not detected.