Abstract
A guanine radical cation G induces electron transfer from a distal guanine Gb through DNA over long adenine:thymine (A:T)n bridges according to Equation (1). For n≤3, only guanine bases are charge carriers and the electron transfer rate kCT depends strongly upon the distance. For n≥4, not only guanines but also adenines are charge carriers and the charge transfer rate from Ga to Gb only slightly decreases with a further increase in n. This effect is shown in the graph. The yields of the water-trapped products are described by the Curtin–Hammett principle.
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