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Changes of the absorption (A) and CD (B) spectra during the irradiation of 2e (1) and 2f (2) (c = 20 μM) in the presence of ct DNA (cDNA = 0.1 mM) in Na phosphate buffer, cNa+ = 16 mM. Blue: spectrum of the starting material before irradiation; red: spectrum at the end of the irradiation.
