Fig. 2.

MDCC-SSB is an mRNA biosensor. (A) Fluorescence excitation and emission spectra for MDCC-SSB measured in the apo (Green), ssDNA bound (blue) and ssRNA bound (red) states. (B) MDCC-SSB fluorescence monitored while ssDNA was titrated into the biosensor in 100 mM NaCl (red) and 200 mM NaCl (blue). (C) Titration performed as in B but with ssRNA. Errors bars represent SEM. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)