Fermentation of mixed glucose-xylose substrates by engineered strains of Saccharomyces cerevisiae: role of the coenzyme specificity of xylose reductase, and effect of glucose on xylose utilization

Table 1 Physiological parameters for BP000 and BP10001 obtained from batch fermentations of a mixed glucose-xylose substrate (10 g/L each)

a) q_glucose and q_xylose were determined from data acquired in the first 6 h of the glucose phase and in the first 50 h of the xylose phase respectively. S.D.s on uptake rates were ≤ 12%;
b) Yield coefficients (g/g glucose and xylose consumed) were calculated using data obtained after a reaction time of 6 h. Except for Y_xylitol where calculation of S.D. was not applicable, S.D.s were ≤ 14%.
c) ND - not detectable
d) Yield coefficients (g/g xylose consumed) represent mean values for the initial 100 hours of the xylose utilization phase. S.D.s were ≤ 11%.

ISSN: 1475-2859