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(a) Double reciprocal plot of 1-AHAQ – calf thymus DNA interaction using UV–vis spectroscopy; [1-AHAQ]0 = 20 µM, pH=7.4, [NaCl]=120 mM, 25 °C. (b). Binding isotherm of 1-AHAQ and calf thymus DNA and corresponding non-linear fit using UV–vis spectroscopy; [1-AHAQ]0=20 µM, pH=7.4, [NaCl]=120 M, 25○C.
