title: DNA alteration and repair.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002273:Carcinogens / Q000494:pharmacology*; D055598:Chemical Phenomena; D002621:Chemistry; D004247:DNA / Q000378:metabolism*; D004260:DNA Repair / Q000187:drug effects*; D004261:DNA Replication; D003624:Darkness; D004255:Deoxyribodipyrimidine Photo-Lyase / Q000378:metabolism; D005854:Germ Cells / Q000187:drug effects; D013997:Time Factors
chemical_list: D002273:Carcinogens; D004247:DNA; D004255:Deoxyribodipyrimidine Photo-Lyase