The induction of d xylose catabolizing enzymes in pachysolen tannophilus and the relationship to anaerobic d xylose fermentation

Du Preez J.C.

Biotechnology Letters 10(3): 207-212

1988


ISSN/ISBN: 0141-5492
DOI: 10.1007/bf01134831
Accession: 006694104

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Abstract
Aerobic cultures harvested from the lag and early exponential growth phases fermented D-xylose poorly under anaerobic conditions whereas fermentatoin by late exponential and stationary phase cultures was rapid. These differences could be related to the ratios of NADH- to NADPH-linked xylose reductase (XR) and the levels of NADH-linked XR and NAD-linked xylitol dehydrogenase (XD) present. Under aerobic conditions, induction of NADPH-linked XR preceded NADH-linked XR which suggested the presence of two separate XR's. Induction of XR and XD was more rapid under aerobic than anaerobic conditions.

The induction of d xylose catabolizing enzymes in pachysolen tannophilus and the relationship to anaerobic d xylose fermentation