. "damaged DNA" . "DNA damages arising from natural processes" . "damage DNA" . "A major problem for life" . "DNA damage response" . "single and double-strand breaks in the DNA" . "damages" . "Damage of nuclear DNA" . . "DNA damage (naturally occurring)" . "damaged" . "damage" . "errors in DNA" . "DNA breaks" . "DNA damaging" . "Endogenous (metabolically-caused) DNA damage" . "DNA strand breaks" . "single-strand DNA damages" . "double-strand breaks" . "DNA repair mechanisms" . "Damage" . "degenerative influences" . "DNA double-strand damages" . "damage its DNA" . . "Damaged DNA" . "strand breaks in DNA" . "DNA" . "DNA repair" . "DNA-damaging" . "Abnormal chemical structures" . "spontaneous DNA damages" . "vulnerability of DNA to damage" . "naturally occurring DNA damage" . "Endogenous (metabolically caused) DNA damage" . "naturally occurring" . . "DNA double strand breaks" . . "endogenous (metabolically-caused) DNA damage" . . "DNA double-strand breaks" . "damage to mitochondrial DNA" . "DNA damaging conditions" . "DNA damage" . "double-strand break in chromosomal DNA" . "oxidative damage" . "naturally occurring DNA damages" . "DNA damages" . "DNA damage (naturally occurring)" .