Enzyme Inhibitors / Biological Chemistry / DNA damage / DNA repair / Biological Sciences / DNA / Humans / Plasmids / CHEMICAL SCIENCES / HeLa cells / Base Sequence / Protein Binding / DNA binding proteins / Nucleic Acid Conformation / DNA / Humans / Plasmids / CHEMICAL SCIENCES / HeLa cells / Base Sequence / Protein Binding / DNA binding proteins / Nucleic Acid Conformation