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Genetic organization of the hbp genes in P. azelaica HBP1. Arrows depict the orientations and sizes of the genes; the solid line indicates noncoding DNA. The hbpR gene codes for the regulatory protein, which activates transcription from the hbpC and hbpD promoters upon exposure to 2-HBP. Regions containing the binding sites for HbpR (UAS) are shown within boxes in the sequence. Sequence numbers refer to the locations of the transcriptional start sites of hbpC and hbpD.
