1.1.1.10 a recombinant Saccharomyces cerevisiae strain D-XR/ARSdR/XK, in which protein engineered NADP+-dependent XDH is expressed, shows 40% increased ethanol production and 23% decrease in xylitol excretion as compared with the reference strain D-XR/XDH/XK expressing the wild-type XDH 1.1.1.10 construction of a cDNA library, DNA sequence determination and analysis, subcloning in Escherichia coli DH5alpha, overexpression as His-tagged enzyme in Saccharomyces cerevisiae strain CEN.PK2 1.1.1.10 DNA sequence determination and analysis, expression in Escherichia coli strain BL21(DE3) 1.1.1.10 expressed in Escherichia coli as a His6 tag fusion protein 1.1.1.10 expressed in Escherichia coli BL21 (DE3) cells 1.1.1.10 expressed in Saccharomyces cerevisiae 1.1.1.10 expressed in Saccharomyces cerevisiae strain MA-R4 1.1.1.10 expressed in Saccharomyces cerevisiae strains MA-N2, MA-N3, MA-N4, and MA-N5 1.1.1.10 expression in Saccharomyces cerevisiae 1.1.1.10 expression of Pichia stipitis mutated XYL2 (D207/I208R/F209S or XYL2 S96C/S99C/Y102C/D207A/I208R/F209S) in Saccharomyces cerevisiae