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Dynamic 19F NMR spectra of fully-paired NarI-dC duplexes with FAF-modification at (a) G3, (b) G1, and (c) G2. Spectra were obtained at seven standard temperatures (5, 10, 20, 30, 40, 50, and 60 °C). Additional temperatures were used to clarify coalescent exchange process (see text).
