FIG 1.

Growth of E. coli on M9 minimal medium containing 0.4% glucose, 4% glucose, 0.4% xylose, or 4% xylose as the sole carbon source. Error bars denote the standard deviation for the results from three biological replicates. (A) Cell growth as determined by optical absorbance. (B) Sugar consumption during growth on 0.4% glucose or xylose. (C) Acetate production during growth on 0.4% glucose or xylose. (D) Sugar consumption during growth on 4% glucose or xylose. (E) Acetate production during growth on 4% glucose or xylose. During growth on higher concentrations of sugar, consumption is incomplete due to acidification of the growth medium.