FIG. 2.

DNase I footprinting with H₆-CodY. DNase I footprint of the codY (A) and gdhA (B) promoter regions in the absence or presence of BCAA (10 mM ILV). In each series, successive lanes contained increasing amounts of CodY (0, 2, 5, 10, 20, and 40 μM). Protected regions are marked by vertical bars and underlined in the DNA sequence (bottom). The CodY boxes are in bold letters, and the start codons are in italic and bold letters.