Abstract
IT has recently been reported that the electron spin resonance spectrum of deoxyribonucleic acid (DNA) irradiated and measured at 77° K is different from that obtained after irradiation at room temperature1,2. We have observed that there are three distinct changes in the shape of the spectrum as the sample is warmed from 77° K to 300° K, the final spectrum being the same as that obtained by irradiating at 300° K.
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References
Alexander, P., Lett, J. T., and Ormerod, M. G., Biochim. Biophys. Acta, 51, 207 (1961).
Salovey, R., Shulman, R. G., and Walsh, W. M., J. Chem. Phys., 39, 839 (1963).
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COOK, J., WYARD, S. Electron Spin Resonance Study of Thermal Effects in Irradiated Deoxyribonucleic Acid. Nature 210, 526–527 (1966). https://doi.org/10.1038/210526a0
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DOI: https://doi.org/10.1038/210526a0
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