Quantitative analysis of sigma factor regulons uncovered by mRNA profiling.

The total sizes of the individual regulons are listed at the top. Values in the colored cells show the numbers of genes regulated uniquely by the sigma factors. The intersection values show how many genes were cross-regulated by two sigma factors.a The regulon size is the sum of all genes found to be significantly (fold change ≥ 3, corrected P value ≤0.05, see Materials and Methods for exceptions) regulated upon inactivation and/or in trans expression of the sigma factor.Quantitative analysis of sigma factor regulons uncovered by mRNA profiling.