MutagensCarcinogensMutagenicity TestsDNA DamageComet AssayMicronuclei, Chromosome-DefectiveDNA AdductsSister Chromatid ExchangeTumor Suppressor Protein p53Antimutagenic AgentsModels, ChemicalCarcinogenicity TestsDNA RepairMethyl MethanesulfonateChemical PhenomenaChemical IndustryUltraviolet RaysMultiple Chemical SensitivityApoptosis