Agarose gel electrophoresis for studying possible DNA damaging effect. Agarose gel electrophoretic patterns of plasmid DNA treated with A. fruticosa L. A Ailanthus altissima methanolic B and hexane C extract in the absence of Fe3+ ions (0.08 mM): lane 1 – DNA control; lane 2 – Fe2+ ions control; lane 3 – 10 µg/mL extract; lane 4 – 100 µg/mL extract; lane 5 – 500 µg/mL extract; lane 6 – 1000 µg/mL extract D Densitometrical estimation of the relative quantity of supercoiled DNA.