NEB carries a selection of  DNA repair enzymes for use in multiple applications:

• Repair of DNA sample degradation due to oxidative damage, UV radiation, ionizing radiation, phenol/chloroform extraction, mechanical shearing, formalin fixation (post extraction) or long term storage
• Base excision repair
• DNA mismatch repair
• Nucleotide excision repair
• Forensic analysis of environmental samples, analysis of ancient DNA, DNA damage control, and DNA-DNA and protein-DNA interactions
• Preparation for downstream applications such as PCR, microarray analysis, or other DNA technologies
• Single cell gel electrophoresis (Comet assay) to assess samples for DNA damage
• Genotoxicity tests by alkaline elution or alkaline unwinding
• Manipulation of DNA supercoiling using DNA Gyrase (NEB #M0306) and Topoisomerase I (NEB #M0301)
• Elimination or repair of large DNA secondary structures using T7 Endonuclease I (NEB #M0302)