title: Chromosomal and extrachromosomal localization of amplified dihydrofolate reductase genes in cultured mammalian cells.
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D002874:Chromosome Mapping; D006224:Cricetinae; D003434:Crossing Over, Genetic; D004261:DNA Replication; D004351:Drug Resistance; D005111:Extrachromosomal Inheritance; D005784:Gene Amplification; D008727:Methotrexate / Q000494:pharmacology; D051379:Mice; D008938:Mitosis; D009693:Nucleic Acid Hybridization; D011995:Recombination, Genetic; D012641:Selection, Genetic; D013762:Tetrahydrofolate Dehydrogenase / Q000235:genetics*; D014170:Transformation, Genetic
chemical_list: D013762:Tetrahydrofolate Dehydrogenase; D008727:Methotrexate