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Xylose and arabinose utilisation pathways. Solid lines: oxidation/reduction-based pathways; dashed lines: isomerisation-based pathways. PPP: pentose phosphate pathway. AI: arabinose isomerase; AR: arabinose reductase; LAD: arabitol dehydrogenase; L-XuR: L-xylulose reductase; R5PE: ribulose-phosphate-5-epimerase; RK: ribulokinase; XDH: xylitol dehydrogenase; XI: xylose isomerase; XK: xylulokinase; XR: xylose reductase.
