Patent ID: 8603788

Claim:
A modified yeast strain capable of utilizing xylose in a lignocellulosic hydrolysate for growth or fermentation, comprising an increase in copy number or expression of one or more genes selected from the group consisting of ARE1, VBA3, RNQ1, FUS1, PDI1, BUD23, IMG1, DDI2, SNO3, SNZ3, YCL042W, YCL073C, YCR045C, and tE(UUC)B; a decrease in copy number or expression of one or more genes selected from the group consisting of ALD2, SSA2, MST27, PRM8, ERV14, ECM21, ILS1, PRP6, YBL100W-C, YBR201C-A, and tE(UUC)G2; or both (a) and (b), relative to a parental yeast strain from which the modified yeast strain is derived.