Files in this Data Supplement:

• Supplemental file 1 - Fluorescence histograms of the araC mutant library (Fig. S1); locations of mutated amino acid residues in the 1G2 mutant (Fig. S2); locations of mutated amino acid residues in the dimerization domain of AraC (Fig. S3); approximate position of amino acid residue 280 of AraC (Fig. S4).
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