Identification of predicted binding sites for PacC. Binding sites for PacC in the 1 kb upstream of the start codon were identified using Regulatory Sequence Analysis Tools (RSAT, http://rsat.ulb.ac.be/). A. Promoters of genes upregulated in wt pH 8 vs. wt pH 4 and underexpressed in ΔpacC vs wt pH 8. B. Random promoter sequences from T. virens. C. Promoters of genes downregulated in wt pH 8 vs. wt pH 4 and underexpressed in wt vs. ΔpacC at pH 8.