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The cyclic voltammograms generated by subtracting voltammograms of a 1:1 mixture of Aβ(1–28)/Cu(II) in a N2-purged solution from those of the same mixture in an air-saturated buffer solution at different scan rates, 0.01 V/s (black), 0.02 V/s (red), 0.04 V/s (green), 0.08 V/s (blue) and 0.16 V/s (purple). A glassy carbon disk electrode with a diameter of 3 mm was used as the working electrode.
