Skip to main content
. Author manuscript; available in PMC: 2014 Aug 21.
Published in final edited form as: Science. 2011 Dec 22;335(6065):233–235. doi: 10.1126/science.1215063

Fig. 2.

Fig. 2

Fluoride riboswitch-mediated gene control. (A) Solid media cultures of WT E. coli cells or crcB KO E. coli cells transformed with a riboswitch reporter fusion construct carrying the P. syringae eriC fluoride riboswitch. (B) Plot of the β-galactosidase reporter activity versus fluoride concentration (c) in liquid media supporting growth of transformed E. coli cells [see (A)] as quantified using Miller assays. WT and crcB KO E. coli cells grown in media supplemented with 50 mM NaCl (no added fluoride) yielded 0.06 and 15.5 Miller units, respectively.