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Effect of apocynin on HSA synchronous fluorescence. (a) Quencher of synchronous fluorescence (scanning at fixed Δλ = 15 nm). (b) Quencher of synchronous fluorescence (scanning at fixed Δλ = 60 nm). The mixtures consisted of 1.0 μM HSA and apocynin (0–30 μM) in 10 mM PBS, pH 7.2 at 25 °C. The arrow indicates the addition of apocynin.
