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Photocurrent intensity of Ru–streptavidin labeled CT– DNA films after exposure to 50 μM Fe2+/200 μM H2O2 (Fenton damage) or 10 μM Rose Bengal under irradiation (RB damage) for DNA damage and then incubation in 2 U Fpg solution for DNA repair. The Fenton reagents were aerated with O2 before use. Error bars represent the standard deviation of three replicate electrodes.
