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Diagrams showing the promoter regions and fragments employed to generate lacZ transcriptional fusions and DIG-dUTP-labeled fragments. (A) Fragment of ∼520 bp from the upstream region of the putative vexAB ATG start codon. (B) breAB (vexCD) promoter region. Fragments AB1 and AB2 were used for EMSA. (C) breR promoter region. The R1 and R2 fragments were used for EMSA. The breAB and breR transcriptional start sites are indicated by gray arrows.
