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The ORPR region

Description
The upper diagram shows the nucleotide sequence of the ORPR region, including the three repressor-binding sites (OR1, OR2, and OR3), the leftward promoter PRM, and the -35 and -10 regions for the two promoters (shaded purple and blue, respectively).

The thin horizontal arrows mark the operator half-sites.

Below are the consensus sequences for the -35 and -10 regions and a chart that shows the partial homology among the operator half-sites (that is, the repressor-binding sites).
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