FIG 4.

CcCnoX belongs to the RpoH regulon. Relative fluorescence of the CccnoX::CccnoX-gfp strain was measured in triplicate (error bars denote standard deviation) under the indicated conditions. The last two bars on the right side of the graph show the fluorescence of a CccnoX::CccnoX-gfp strain harboring rpoH on a high-copy-number plasmid, in the absence (−) or the presence (+) of inducer. Differences were evaluated with Student's t test. ns, not significant (P > 0.05). **, P < 0.01; ***, P < 0.001; ****, P < 0.0001.