title: A new form of dihydrofolate reductase in cancer cells.
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D002850:Chromatography, Gel; D004796:Clinical Enzyme Tests; D006801:Humans; D008727:Methotrexate / Q000378:metabolism* / Q000627:therapeutic use; D051379:Mice; D009369:Neoplasms / Q000188:drug therapy / Q000201:enzymology*; D011869:Radioligand Assay; D013762:Tetrahydrofolate Dehydrogenase / Q000032:analysis* / Q000378:metabolism
chemical_list: D013762:Tetrahydrofolate Dehydrogenase; D008727:Methotrexate