Superoxide lon as the cause of the oxygen effect.
D002470:Cell Survival / Q000528:radiation effects; D004307:Dose-Response Relationship, Radiation; D004926:Escherichia coli / Q000201:enzymology / Q000528:radiation effects*; D007501:Iron / Q000502:physiology; D010100:Oxygen; D013482:Superoxide Dismutase / Q000502:physiology*; D014965:X-Rays
D007501:Iron; D013482:Superoxide Dismutase; D010100:Oxygen