Gene amplification and methotrexate resistance in cultured animal cells.
D000818:Animals; D002460:Cell Line; D004351:Drug Resistance; D005784:Gene Amplification; D005796:Genes / Q000187:drug effects; D008727:Methotrexate / Q000494:pharmacology*; D012641:Selection, Genetic / Q000187:drug effects; D013762:Tetrahydrofolate Dehydrogenase / Q000235:genetics
D013762:Tetrahydrofolate Dehydrogenase; D008727:Methotrexate