FIG. 4.

Sensitivities of xyl operon expression to CR under conditions of high (A) and low (B) levels of culture agitation. The experimental design and format of presentation are as described in the legend to Fig. 3 with the following differences: wild type, MD164; ccpA⁻, ST131; ccpB⁻, ST132; ccpA⁻ ccpB⁻, ST133; hatched bars, LB medium plus 1% xylose; white bars with black dashes, LB medium plus 1% xylose plus 1% glucose; stippled bars, LB medium plus 1% xylose plus 1% sucrose. Error bars denote standard deviations.