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Binding of Sco1678 (GntR) to gntR-K region (a) and to promoters of gntP and gntZ (b). 0.2 pmol DNA fragment was incubated with indicated GntR-His concentration. Promoter region of SCO1263 was used in reaction as a negative control to check GntR-His specificity to its target (gnt) genes.
