Abstract
DNA polymerases involved in bleomycin-induced unscheduled DNA synthesis in some permeable human cells and rodent cells were studied by using selective inhibitors (aphidicolin, 2′,3′-dideoxythymidine-5′-triphosphate and N-ethylmaleimide) for DNA polymerases. The results suggest that both DNA polymerases α and β are involved in bleomycin-induced unscheduled DNA synthesis in permeable HeLa-S3 cells and probably in some other permeable human cells (HEp-2, KB and WI-38 VA-13 cells). Bleomycin-induced unscheduled DNA synthesis in some permeable rodent cells ( SR- C3H He , Balb c 3T3, 3Y1 and XC cells) is mostly attributed to DNA polymerase β.
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