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Average per-base coverage (y axis) across all RNA-seq replicates in the region of the sigF-nrsF and yedY1Z1-mrpX operons. The inset shows the transcriptional start sites that were identified and the SigF promoter found upstream from the start sites. The nucleotides also conserved in Caulobacter crescentus and Bradyrhizobium japonicum are indicated in bold.
