title: Preparation of tritiated dihydrofolic acid of high specific activity.
mesh_terms: D002848:Chromatography, DEAE-Cellulose / Q000379:methods; D005492:Folic Acid / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D007202:Indicators and Reagents; D007553:Isotope Labeling / Q000379:methods; D013056:Spectrophotometry, Ultraviolet; D014316:Tritium
chemical_list: D007202:Indicators and Reagents; D014316:Tritium; C010920:dihydrofolate; D005492:Folic Acid