UV-Vis spectra of H₂O₂ and its quenching by apigenin.

<p>(<b>A</b>) UV-Vis spectra of calf thymus (CT) DNA incubated with varying concentration of H₂O₂ ranging from 1.95 mM to 125 mM. (<b>B</b>) Quenching of UV-Vis spectra by apigenin after H₂O₂ treatment. CT-DNA was incubated with varying concentration of apigenin ranging from 0.2 mM to 0.8 mM followed by H₂O₂ treatment. The experiment was repeated three times with similar results. Details are described in materials and methods section.