Main Reaction: L-xylulose + NAD(P)H >> NAD(P)+ + xylitol

Reference: PubMed ID: 18346277
Authors: Petschacher B, Nidetzky B
Title: Altering the coenzyme preference of xylose reductase to favor utilization of NADH enhances ethanol yield from xylose in a metabolically engineered strain of Saccharomyces cerevisiae.
Published: 2008 Mar 17

L-xylulose + NAD(P)H --> NAD(P) + xylitol