DNA damage and repair were evaluated by alkaline single cell gel electrophoresis ( comet assay ) assisted by DNA repair enzymes : endonuclease III ( Nth ) and formamidopyrimidine-DNA glycosylase ( Fpg ) , preferentially recognizing oxidized DNA bases .
O O O O O O O O O O O O O O O O O O O O O O B-GeneOrGeneProduct I-GeneOrGeneProduct O B-GeneOrGeneProduct O O B-GeneOrGeneProduct I-GeneOrGeneProduct O B-GeneOrGeneProduct O O O O O O O O