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Distribution of IS elements in the flhDC-uspC intergenic region (shown in genomic orientation). The cAMP-CRP binding site is shown as an open hexagon, and the transcriptional start site is shown by a bent arrow. The tick marks are at 100-bp intervals from the start of flhD. The locations of binding regions for H-NS and four transcriptional repressors are shown as solid bars (13, 14, 18, 20, 22).
