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Schematic representation of the 113-bp repeats downstream of the rnpB gene in E. coli strain K-12 and insertion of the flk locus in the same region in the H3 strain. The 113-bp repeats are indicated by open rectangles. The 23-bp sequences corresponding to the last 23 bp of the rnpB gene are indicated by shaded rectangles. The positions of DRs in H3 are indicated.
