title: Quantitation of dihydrofolate reductase in individual parental and methotrexate-resistant murine cells. Use of a fluorescence activated cell sorter.
mesh_terms: D002460:Cell Line; D004351:Drug Resistance; D005456:Fluorescent Dyes; D007700:Kinetics; D008727:Methotrexate / Q000494:pharmacology*; D009154:Mutation; D013050:Spectrometry, Fluorescence; D013762:Tetrahydrofolate Dehydrogenase / Q000378:metabolism*
chemical_list: D005456:Fluorescent Dyes; D013762:Tetrahydrofolate Dehydrogenase; D008727:Methotrexate