Figure 4

Comparisons of ethanol production and residual sugars of Z. mobilis strains in medium when xylose was the only carbon resource. Cultures were grown in RM medium (10 g/L yeast extract, 1 g/L KH₂PO₄, 1 g/L Carbamide, 0.5 g/L MgSO₄.6H₂O) with 60 g/L xylose as the only carbon source under anaerobic conditions at 32°C. All strains were tested by three parallel experiments. After 60 hours fermentation, ethanol production of all strains was measured immediately by GC. The highest ethanol concentration of XU1 and HYMX3 was 24.9 g/L, 24.1 g/L, respectively.