"Chemical Viewed Functionally"^^ . "Oxygen RadicalsSYNCI" . "Oxygen Radical"^^ . "C1421"^^ . "Reactive Oxygen SpeciesSYNCI" . "Organic or inorganic chemicals that contain an oxygen atom with an unpaired electron. This unstable electron configuration causes these chemicals to be highly reactive with other molecules.NCI" . "Oxygen_Radicals"^^ . "Element, Ion, or Isotope"^^ . "CHEBI:26523"^^ . "C0162772"^^ . "CHEBI:61073"^^ . "ROSSYNCI" . . . . "Oxygen RadicalPTNCI" . . "Oxygen Radical"^^ . "Molecules or ions formed by the incomplete one-electron reduction of oxygen. These reactive oxygen intermediates include SINGLET OXYGEN, SUPEROXIDES, PEROXIDES, HYDROXYL RADICAL and HYPOCHLOROUS ACID. They contribute to the microbicidal activity of PHAGOCYTES, regulation of signal transduction and gene expression, and the oxidative damage to NUCLEIC ACIDS, PROTEINS, and LIPIDS.MSH2002_06_01" .