The yield of total free base release, Gtot(fbr), is shown as a function of the yield of deoxyribose radicals, GdRib(fr). Three possible ratios, S = Gtot(fbr)/GdRib(fr) = 1, 2, and 3 are shown by dotted lines. The data for Mlut falls close to S = 2 and the data for CGmer and 12mer fall close to S = 3. One data point had an unusually high error in fbr due to a large background of Gua release when d(CGCGCGCGCG)2 was at Γ = 22.