Figure 4.
Orthogonal theophylline-sensing pT181 fusions based on the strand-exchange design. (A) The region that determines the target-specificity of pT181 ncRNA is in the cyan box (4), and allosteric region is in the black box. The sequences of theophylline-sensing WT pT181 and MT pT181 fusions are shown. (B) Experimental setup to test theophylline-induced target specificity of theo–SE–pT181WT and theo–SE–pT181MT. All four possible combinations between aptamer–ncRNA fusions and reporters were assayed with and without theophylline. (C) Fluorescence assay data with red bars showing (−) theophylline and blue bars showing (+) 2.5 mM theophylline.