The effect of visible light (410-550 nm) on radical composition and concentration in solid DNA and DNA constituents, previously γ-irradiated at -196°C in the dark in vacuo, was studied by electron spin resonance. For DNA, adenine, cytosine, and guanine, 70% or more of the radicals were removed by illumination at -196°C, for thymine and 2′-deoxy-D-ribose, about 20%. The decrease of the radical concentration for the corresponding nucleosides was smaller. For thymidine the radical concentration was unchanged by illumination. The combined effects of thermal annealing and illumination on γ-irradiated DNA were also investigated.
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Research Article| February 01 1977
ESR Study of the Effect of Visible Light on γ-Irradiated DNA and Its Constituents at 77 K
Shiro Kominami ;
Victorio T. Wee ;
Radiat Res (1977) 69 (2): 213–222.
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Shiro Kominami, Victorio T. Wee, Peter Riesz; ESR Study of the Effect of Visible Light on γ-Irradiated DNA and Its Constituents at 77 K. Radiat Res 1 February 1977; 69 (2): 213–222. doi: https://doi.org/10.2307/3574429
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