Cell growth and fermentation of glucose and xylose in Z. palmae/pMFY31-Pgap-xylA/xylB-Pgap-tal/tktA. The recombinant strain was cultured statically in T medium containing 40 g/liter glucose (A), 40 g/liter xylose (B), or a mixture of 20 g/liter glucose and 20 g/liter xylose (C) at 30°C. Open circles indicate the growth of the strain, closed squares indicate residual glucose, closed diamonds indicate residual xylose, and closed triangles indicate the accumulation of ethanol.