Relative activities of selected RpoHI- and RpoHII-dependent promoters.

β-galactosidase activity of lacZ operon fusions with selected R. sphaeroides promoter regions monitored in tester strains expressing RpoHI (black), RpoHII (grey), or neither proteins. Genes are grouped according to the gene expression profiles displayed in the gene expression experiments: genes whose expressions were affected only by RpoHI, only by RpoHII, and by both RpoHI and RpoHII. Error bars represents the standard error of the mean from three independent replicates.




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