FIG. 2.
Differential gene expression plots in the fruR (A) and the fruC (B) mutants compared to the wild-type strain. Relative signal intensities (mean normalized quanta) are plotted for genes as measured for the wild-type (x axis) and mutant (y axis) strains. The names of the genes that differ significantly (based on a threefold and a z-test [see Materials and Methods]) in the strains are indicated. Of these, only fruR, fruC, and fruA were induced more than threefold. In the fruR mutant their corresponding ratio and P values are 45 and 4 × 10−29 for fruR, 38 and 3 × 10−20 for fruC, and 21 and 8 × 10−23 for fruA. In the fruC mutant their corresponding ratio and P values are 23 and 1 × 10−49 for fruR, 41 and 8 × 10−69 for fruC, and 5 and 4 × 10−14 for fruA.