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In vivo DMS footprinting shows that AraC binding is not affected by CAP. The left three lanes show the DMS footprinting of plasmid p10, which has the ara pBAD-I1-I1* promoter without a CAP binding site. The right three lanes show the footprinting at p10+CAP plasmid, which has the araBAD-I1-I1* promoter with a CAP site. The footprinting was done in SH321 or SH322 cells.
