FIG. 7.

CD spectra of various aptamers and derivatives. Spectra were acquired as described in Materials and Methods. The various aptamers and derivatives used are shown in Tables 1 and 2. (A) Spectra acquired in potassium buffer: 50 mM Tris-HCl (pH 8), 80 mM KCl, 6 mM MgCl₂, and 1 mM DTT; (B) Spectra acquired in sodium buffer: 50 mM Tris-HCl (pH 8), 80 mM NaCl, 6 mM MgCl₂, and 1 mM DTT. Color images available online at www.liebertonline.com/nat