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Here, we present synchrotron radiation circular dichroism spectra for a series of DNA adenine strands, (dA)n, n = 2–10, 15, at acidic pH. Reference spectra of a protonated single strand, (dAH+)n, and a protonated double helix, (dAH+)n:(dAH+)n, are provided in the wavelength region from 175 to 330 nm. The largest spectral difference between single and double strands is in the vacuum ultraviolet, where...
Here we report synchrotron radiation circular dichroism spectra of various G‐quadruplexes from 179 to 350 nm, and a number of bands in the vacuum ultraviolet (VUV) are reported for the first time. For a tetramolecular parallel structure, the strongest band in the spectrum is a negative band in the VUV at 182 nm; for a bimolecular antiparallel structure with diagonal loops, a new strong positive band...
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