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- W2014862601 abstract "An excess electron was attached to naphthalimide (NI) modified 12-mer oligodeoxynucleotides (ODNs) and the electron transfer in DNA was investigated by monitoring the transient absorption of NI radical anion (NI•-) during the pulse radiolysis. Formation of the transient absorption of NI•- was observed according to the reaction of eaq- with NI-modified ODN. Only 25% of eaq- reacting with NI-modified ODN were observed by the transient absorption of NI•-, which corresponds to electron transfer over no more than three base pairs, suggesting a low mobility of an electron attached to DNA. Electron transfer in DNA was also studied by γ-radiolysis of ODN containing 5-iododeoxyuridine (IU) as a second electron acceptor. Electron transfer in DNA was estimated by the protection of dehalogenation of IU offered by NI during the γ-radiolysis of NI- and IU-modified ODNs where the spacing between the NI and IU was varied. The protection effect became very low by the insertion of three or four A−T base pairs between NI and IU. The results driven from both pulse radiolysis and γ-radiolysis experiments were consistent with the low mobility of an excess electron in DNA, which is in strong contrast to the occurrence of the long-range hole transfer in DNA." @default.
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- W2014862601 date "2003-10-24" @default.
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- W2014862601 title "Excess Electron Transfer in DNA Studied by Pulse Radiolysis and γ-Radiolysis of Naphthalimide and Iodouridine Modified ODN" @default.
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- W2014862601 doi "https://doi.org/10.1021/jp0346211" @default.
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