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Relative fluorescence intensity decrease of ethidium bromide (1.2 μM)-DNA(12.0 μM) complex induced by the binding of (A) spermine with CP DNA(-▪-), EC DNA (-•-), ML DNA (-▴-) and (B) spermidine with CP DNA(-▪-), EC DNA (-•-), ML DNA (-▴-) conducted in 10 mM SHE buffer pH 7.0 at 293.15 K (Inset: The values of IC50 of CP, EC and ML DNA shown as a bar graph).
