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. 2011 Nov 4;6(11):e27316. doi: 10.1371/journal.pone.0027316

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XR: Xylose reductase; LAD: L-arabitol dehydrogenase; LXR: L-xylulose reductase; XDH: xylitol dehydrogenase; XK: xylulokinase.