Acetone stimulation of ethanol production from d-xylose by Pachysolen tannophilus |
| |
Authors: | Nancy J Alexander |
| |
Institution: | (1) U.S. Department of Agriculture, Agricultural Research Service, Northern Regional Research Center, 1815 N. University Street, 61 604 Peoria, IL, USA |
| |
Abstract: | Summary
Pachysolen tannophilus, a homothallic yeast, converts xylose to ethanol at a yield of 0.3 (g/g xylose). Concomitant with ethanol production, xylitol accumulates in the culture medium at similar yields (0.3 g/g xylose). The addition of the hydrogen-accepting compound, acetone, increases the amount of ethanol produced by this organism by 50–70%. The increase in ethanol is directly correlated with a decrease in xylitol secreted. The results indicate that conversion of acetone to 2-propanol by the cells provides the NAD+ used as a cofactor by xylitol dehydrogenase, the enzyme responsible for converting xylitol to xylulose.The mention of firm names or trade products does not imply that they are endorsed or recommended by the U. S. Department of Agriculture over other firms or similar products not mentioned. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|