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CodY interaction with ilvE promoter. Radiolabeled DNA probes were incubated with 1,500 nM CodY or DnaK, as indicated. Promoter regions used for binding assays were the ATPase promoter (lane 1) and the ilvE promoter region (lanes 2 to 4). No branched-chain amino acids were added to binding reaction mixtures. Arrows at left indicate migration of free probes (FP).
