title: Reversal of resistance to methotrexate in L1210 murine leukemia by uracil.
mesh_terms: D000818:Animals; D004247:DNA / Q000096:biosynthesis; D004351:Drug Resistance; D007939:Leukemia L1210 / Q000188:drug therapy* / Q000201:enzymology; D015122:Mercaptopurine / Q000627:therapeutic use; D008727:Methotrexate / Q000627:therapeutic use*; D009696:Nucleic Acids / Q000096:biosynthesis; D013762:Tetrahydrofolate Dehydrogenase / Q000378:metabolism; D013936:Thymidine / Q000378:metabolism; D014316:Tritium; D014498:Uracil / Q000627:therapeutic use*
chemical_list: D009696:Nucleic Acids; D014316:Tritium; D014498:Uracil; D004247:DNA; D015122:Mercaptopurine; D013762:Tetrahydrofolate Dehydrogenase; D013936:Thymidine; D008727:Methotrexate