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Schematic of GabR binding sites at the gabR and gabTD promoters. A schematic of the gabR and gabTD gene loci, as previously elucidated (2), is shown here. The 47-bp GabR binding site (−63 to −17) within the gabR−gabT regulatory region is shown in detail, and the two direct repeats (ATACCA) are indicated. The arrows indicate the transcription start sites and directions for the gabR and gabT genes.
