Guanine-cytosine basepair

Fig. I. (left) Baseparing between a guanine-cytosine basepair and coupling of the CO-stretch vibrations, (right) Linear infrared absorption spectra of CO-stretch region of the studied duplexes.

Figure 8.5 The chemical structures of some fluorophores commonly used in FRET experiments. l,3-Diaza-2-oxophenothiazine is a cytosine analog (Wilhelmsson et al., 2001), and is shown basepaired to guanine (gray).

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