Effect of Aβ1–12 fragment on mobility of DNA in 0.8% agarose gel electrophoresis. Lanes 1–4 were the samples of polydGdC:polydGdC with Aβ1–12 incubated at room temperature for 1, 2, 3, and 4 days, respectively. As control, lanes 5–8 were polydGdC:polydGdC alone incubated for 1, 2, 3, and 4 days, respectively.