FIG 3.

Northern blot analysis of V. cholerae riboswitch mutants. Lanes are as described in the main text. Shown is a Northern blot of the four V. cholerae strains indicated at the top of the blot with the Vc2 probe show in Fig. 2A. It is representative of multiple experiments. The film shown here is overexposed in order to aid the visualization of bands. Values reported in the text were quantified from blots exposed to film over a linear range of detection. DGC, overexpression of QrgB; PDE, overexpression of VC1086.