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AFM images. 500 × 500 nm (512 × 512 pixel) AFM images of 753-bp substituted double-stranded DNA molecules deposited on mica in 5 mM Tris-HCl, pH 7.5 supplemented with 10 mM NaCl and 5 mM MgCl2. Color scale (from dark to light) is 0–2 nm. Thymine variant 6 (see Fig. 7) is shown as a representative example.
