Abasic sites, AP endonuclease, Base excision repair, DNA damage, DNA repair, Endonuclease IV, Nucleotide incision repair, Oxidative damage, Staphylococcus aureus, DNA/metabolism, DNA-(Apurinic or Apyrimidinic Site) Lyase/metabolism, Hydrogen Peroxide, Deoxyribonuclease IV (Phage T4-Induced)/chemistry, Nucleotides, Escherichia coli/metabolism, DNA Repair, Cloning, Molecular, Staphylococcus aureus/genetics, DNA Damage, Endonucleases/metabolism