title: Preparation of (6S)-5-formyltetrahydrofolate labeled at high specific activity with 14C and 3H.
mesh_terms: D002250:Carbon Radioisotopes; D002848:Chromatography, DEAE-Cellulose / Q000379:methods; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D007700:Kinetics; D002955:Leucovorin / Q000138:chemical synthesis*; D011865:Radioisotope Dilution Technique; D014316:Tritium
chemical_list: D002250:Carbon Radioisotopes; D007202:Indicators and Reagents; D014316:Tritium; D002955:Leucovorin