radicalsHydroxyl radical is the most reactive free radical. It easily reactswith biomolecules, such as amino acids, proteins and DNA [57].Therefore, scavenging of the hydroxyl radical is probably one of themost effective defences of a living body against various diseases.Hydroxyl radicals generated by the Fenton reaction are known tocause oxidative induced breaks in supercoiled plasmid DNA to yieldits open circular or relaxed forms.