title: Purine insertase: a new enzyme.
mesh_terms: D001080:Apurinic Acid; D004260:DNA Repair; D003851:Deoxyribonucleases / Q000378:metabolism*; D004720:Endonucleases / Q000378:metabolism*
chemical_list: D001080:Apurinic Acid; D003851:Deoxyribonucleases; D004720:Endonucleases