[An oxygen species that carries an unpaired electron (e.g., the hydroxyl radical and the superoxide anion). These radicals are very powerful oxidizing agents and cause structural damage to proteins and nucleic acids. They mediate the damaging effects of ionizing radiation. (from Online Medical Dictionary) ( NCI )]
UMLS (NCI) C0162772 - Biologically Active Substance
- Element, Ion, or Isotope