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. 2016 May 12;6:25737. doi: 10.1038/srep25737

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(A–C) The chemical structure of PT-free, R_p-PT and S_p -PT modification in DNA, respectively. The torsion angles were indicated. (D) The melting temperature of PT-free dsDNA (green), [S_p, S_p]-PT dsDNA (red), and [R_p, R_p]-PT dsDNA (blue) measured by DSC assay. (E) The electron transfer potentials of ssDNA measured by cyclic voltammetry assay of S_p-PT ssDNA (black), R_p-PT ssDNA (pink) and PT-free ssDNA (cyan). (F) The circular dichroism (CD) spectra of PT-free dsDNA (green), [S_p, S_p]-PT dsDNA (red), [R_p, R_p]-PT dsDNA (blue), respectively; (G–I) The electron transfer potentials of dsDNA containing buffer control, PT-free dsDNA (green), [S_p, S_p]-PT dsDNA (red), [R_p, R_p]-PT dsDNA (blue).