Abstract: Described herein are recombinant yeast cells expressing a xylulose kinase (XK) which are suitable for fermentation of pentoses. Also described are recombinant yeast cells with higher tolerance to formic and/or acetic acid and suitable for fermentation of pentoses. Also described are recombinant yeast cells expressing an enolase, a phosphofructokinase beta subunit, a 6-phosphofructo-2-kinase, a glucose-6-phosphate isomerase, a phosphoglycerate mutase and/or a triose-phosphate isomerase, and suitable for fermentation of pentoses. Also described are recombinant yeast cells expressing a a phosphoglucomutase and/or phosphoribomutase which are suitable for fermentation of pentoses. Further described are are methods of using or producing such recombinant yeast cells and related materials.

Abstract: Described herein are recombinant yeast cells expressing a xylulose kinase (XK) which are suitable for fermentation of pentoses. Also described are recombinant yeast cells with higher tolerance to formic and/or acetic acid and suitable for fermentation of pentoses. Also described are recombinant yeast cells expressing an enolase, a phosphofructokinase beta subunit, a 6-phosphofructo-2-kinase, a glucose-6-phosphate isomerase, a phosphoglycerate mutase and/or a triose-phosphate isomerase, and suitable for fermentation of pentoses. Also described are recombinant yeast cells expressing a phosphoglucomutase and/or phosphoribomutase which are suitable for fermentation of pentoses. Further described are methods of using or producing such recombinant yeast cells and related materials.

Abstract: Described herein are recombinant yeast cells expressing a xylulose kinase (XK) which are suitable for fermentation of pentoses. Also described are recombinant yeast cells with higher tolerance to formic and/or acetic acid and suitable for fermentation of pentoses. Also described are recombinant yeast cells expressing an enolase, a phosphofructokinase beta subunit, a 6-phosphofructo-2-kinase, a glucose-6-phosphate isomerase, a phosphoglycerate mutase and/or a triose-phosphate isomerase, and suitable for fermentation of pentoses. Also described are recombinant yeast cells expressing a phosphoglucomutase and/or phosphoribomutase which are suitable for fermentation of pentoses. Further described are methods of using or producing such recombinant yeast cells and related materials.

Abstract: A S. cerevisiae strain expressing both arabinose and xylose utilization pathways, and in particular to a S. cerevisiae strain fermenting both arabinose and xylose to ethanol, and more particularly a S. cerevisiae strain with overexpression or upregulation of xylose- or aldose reductase (XR, AR) with xylitol dehydrogenase (XDH) together with overexpression or upregulation of genes forming an arabinose utilization pathway. The invention encompasses both laboratory and industrial strain having these properties.

Abstract: The present invention relates to a S. cerevisiae strain expressing both arabinose and xylose utilization pathways, and in particular to a S. cerevisiae strain fermenting both arabinose and xylose to ethanol, and more particularly a S. cerevisiae strain with overexpression or upregulation of xylose- or aldose reductase (XR, AR) with xylitol dehydrogenase (XDH) together with overexpression or upregulation of genes forming an arabinose utilization pathway. The invention encompasses both laboratory and industrial strain having these properties.

Abstract: The present invention relates to a new xylose utilizing Saccharomyces cerevisiae strain being able to utilize xylose for ethanol production which strain is up-regulated with regard to the genes for xylose reductase (XR) and xylulose dehydrogenase (XDH) as well as xululokinase (XK) and over-expressing the non-oxidative pentose phosphate pathway (PPP) and comprising a deletion of the gene GRE3 deletion, as well as the strain has been adapted to xylose feeding.

Abstract: The present invention relates to a novel Saccharomyces cerevisiae strain utilizing xylose for fermenting ethanol expressing xylose isomerase (XI), overexpressing xylulokinase (XK), overexpressing the pentose phosphate pathway (PPP), and non-expressing aldose reductase (AR) and being adapted to growth in mineral defined medium with xylose as sole carbon source.