Table 2 Xylose reductase (XR) and xylitol dehydrogenase (XDH) specific activities in crude-cell extracts of S. stipitis, S. passalidarum, S. arborariae and C. tenuis
From: Comparative assessment of fermentative capacity of different xylose-consuming yeasts
Yeasts species | Oxygen conditions | XR (U mg−1) | XDH (U mg−1) | ||
|---|---|---|---|---|---|
NADH | NAD(P)H | RatioNADH/NAD(P)H | NAD+ | ||
S. stipitis S. passalidarum S. arborariae C. tenuis | Aerobic | 0.17 ± 0.06 | 0.23 ± 0.05 | 0.74 ± 0.13 | 0.23 ± 0.11 |
2.96 ± 0.40 | 2.15 ± 0.12 | 1.38 ± 0.16 | 0.30 ± 0.05 | ||
0.88 ± 0.13 | 3.10 ± 0.29 | 0.29 ± 0.05 | 0.65 ± 0.07 | ||
– | 0.35 ± 0.07 | – | 0.25 ± 0.05 | ||
S. stipitis S. passalidarum S. arborariae C. tenuis | Oxygen-limited | 0.26 ± 0.07 | 0.45 ± 0.11 | 0.59 ± 0.16 | 0.19 ± 0.08 |
0.60 ± 0.08 | 0.46 ± 0.04 | 1.29 ± 0.07 | 0.21 ± 0.03 | ||
0.77 ± 0.17 | 1.86 ± 0.25 | 0.43 ± 0.16 | 0.12 ± 0.04 | ||
– | 0.27 ± 0.05 | – | 0.28 ± 0.06 | ||