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Structure prediction and CD experiments for DNA aptamer GO18-T-d. (A) The sequence and GQ-core pattern of GO18-T-d. (B) Full-length 3D model of GO18-T-d. (C) CD spectra of GO18-T-d in the presence of different cations. Aptamers were annealed directly in the buffers (20 mM Tris-HCl, pH 7.4) with ions. (D) Chemical structures of GTX1/4, GTX2/3, STX and neoSTX.
