D-Xylulose → aldehydo-D-Xylose

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Paying attention to the fact that xylitol produced in Candida sp strains is reduced by its conversion to xylulose by xylitol dehydrogenase, the present inventors have developed xylitol dehydrogenase-inactivated Candida tropicalis mutant, in which xylitol produced from xylose can no longer be used for cell growth, and thus xylose can be bioconverted to xylitol with a theoretical yield of 100% (Ko, B. S. et. al., Appl. Environ. Microbiol. 72:4207-4213, 2006). Thus, the present inventors filed an application for the protection of an invention relating to a method of producing xylitol in high yield using a xylitol-producing strain, in which the expression of xylitol dehydrogenase is inhibited (Korean Patent Application No. 10-2005-0079751, filed on Aug. 30, 2005).

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