Ratiometric fluorescent sensors were constructed from RNA aptamers by generating modular ribonucleopeptide complexes. Fluorescent ribonucleopeptides containing fluorophore seminaphthorhodafluor tethered to their peptide subunit revealed a dual emission property, which permitted a ratiometric fluorescent measurement of a substrate-binding event. The strategy successfully afforded ratiometric fluorescent sensors for biologically active small ligands, tetracycline, dopamine and streptomycin.
Organic & Biomolecular Chemistry
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