Fig. S3.

Features of stem-loop formation (related to Fig. 5). (A) Fluorescence production from luxR-gfp in the presence of Qrr4 mutants at the top of the stem (vertical stripes) and the bottom of the loop (horizontal stripes) of SL3. Black bars show fluorescence production in the presence of a vector or WT Qrr4. (B) Fluorescence production from luxR-gfp in the presence of Qrr4 mutants in SL4. Vector and WT Qrr4 are denoted by black bars. White bars show mutations in SL4 that disrupt, and subsequently restore, stem-loop formation. In both panels, error bars represent SDs of at least three trials.