title: Further evidence for the genetic origin of mutations in mammalian somatic cells: the effects of ploidy level and selection stringency on dose-dependent chemical mutagenesis to purine analogue resistance in Chinese hamster ovary cells.
mesh_terms: D001375:Azaguanine / Q000494:pharmacology; D002460:Cell Line; D004305:Dose-Response Relationship, Drug; D004351:Drug Resistance; D005020:Ethyl Methanesulfonate / Q000494:pharmacology*; D008698:Mesylates / Q000494:pharmacology*; D009153:Mutagens; D009154:Mutation; D011003:Ploidies; D012641:Selection, Genetic; D013866:Thioguanine / Q000494:pharmacology
chemical_list: D008698:Mesylates; D009153:Mutagens; D005020:Ethyl Methanesulfonate; D013866:Thioguanine; D001375:Azaguanine