title: Multiple messenger RNAs for dihydrofolate reductase.
mesh_terms: D000818:Animals; D003001:Cloning, Molecular; D004351:Drug Resistance; D007940:Leukemia L5178 / Q000201:enzymology; D008727:Methotrexate / Q000494:pharmacology; D051379:Mice; D009693:Nucleic Acid Hybridization; D014176:Protein Biosynthesis; D012333:RNA, Messenger / Q000235:genetics*; D013762:Tetrahydrofolate Dehydrogenase / Q000235:genetics*
chemical_list: D012333:RNA, Messenger; D013762:Tetrahydrofolate Dehydrogenase; D008727:Methotrexate