Figure 1: Experimental optical Kerr effect spectra and the component fit functions used to fit the data for the 20-bp AT oligomer. | Nature Communications

Figure 1: Experimental optical Kerr effect spectra and the component fit functions used to fit the data for the 20-bp AT oligomer.

From: Observation of coherent delocalized phonon-like modes in DNA under physiological conditions

Figure 1

The temperatures run from 298 (blue) to 358 K (red) in steps of 10 K. Each spectrum has been fitted using the combination of a Debye function (D), a Cole–Cole function (CC) and four Brownian oscillators (B1–B4). The features in the figure that change in an unexpected manner are the bands B2 and B4 (with emphasized colours). The intensity of B2 increases with temperature, while the intensity of B4 reduces. The inset shows the intensity of the bands B2 (blue) and B4 (red). They are compared with the scaled results of a circular dichroism experiment (ellipticity at 248 nm, green).

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