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. 2015 May 14;5:10163. doi: 10.1038/srep10163

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Circular dichroism (CD) spectra of C₆ (a) and G₆ (b). Dashed black lines: data for the bare strands at 25 °C. Blue lines: with 1 Ag⁺/base at 25 °C. Red lines: with 1 Ag⁺/base at 90 °C. The restructuring of the CD spectra upon addition of Ag⁺ reflects the reconfiguration of the DNA by incorporation of Ag⁺. Persistence of the dichroic peaks to the highest temperature accessible experimentally shows that this structural change is thermally robust.