title: Introduction: DNA damage and repair.
mesh_terms: D000818:Animals; D002273:Carcinogens / Q000378:metabolism / Q000494:pharmacology*; D004247:DNA / Q000378:metabolism*; D004260:DNA Repair; D004261:DNA Replication / Q000187:drug effects*; D004259:DNA-Directed DNA Polymerase / Q000378:metabolism*; D006801:Humans; D008099:Liver / Q000201:enzymology; D008115:Liver Regeneration; D051381:Rats; D012867:Skin / Q000378:metabolism; D014983:Xeroderma Pigmentosum / Q000378:metabolism
chemical_list: D002273:Carcinogens; D004247:DNA; D004259:DNA-Directed DNA Polymerase