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Oxidation of tri-O-Ac-8-oxoG (λmax = 295 nm) initiated by the photolysis of AAPH (λmax = 365 nm) in air-equilibrated phosphate buffer solutions. The solutions were photolyzed using 340–390 nm steady-state irradiation (~100 mW/cm2) from a 100 W Xe arc lamp for fixed periods of time. The inset shows the decay of tri-O-Ac-8-oxoG (100 μM) absorbance as a function of time during the course of AAPH (300 μM) photolysis.
