Abstract
Recombinant Klebsiella oxytoca strain P2 carrying genes for pyruvate decarboxylase and alcohol dehydrogenase from Zymomonas mobilis was evaluated for its ability to ferment arabinose, xylose and glucose alone and in mixtures in pH-controlled batch fermentations. This organism produced 0.34–0.43 g ethanol/g sugar at pH 6.0 and 30°C on 8% sugar substrate and demonstrated a preference for glucose. Sugar utilization was glucose > arabinose > xylose and ethanol production was xylose > glucose > arabinose.
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