Mediating Effects of DNA on Some Photochemical Processes
The work which follows may be thought of in terms of photosensitization of simple one electron transfer reactions and of the way in which the DNA environment effects both their yields and rates. Electron transfer reactions in DNA have important biological consequences; for example, they are involved in the formation and repair of thymine dimers which are the major damaging species produced in the cell by UV light (Jorns, 1987). Also, abnormally high mobilities for electrons in DNA have been reported (Van Lith et al., 1986), a phenomenon which may be of considerable importance in the understanding of many biological processes. The following studies make no pretense of being actual biological processes which commonly occur in living systems. The reactions studied are, however, electron transfer reactions which are caused to take place in the DNA matrix, and as such are valid reflections of the way DNA mediates such processes.
KeywordsEthidium Bromide Electron Transfer Reaction Flash Photolysis Pulse Radiolysis Ground State Absorption
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