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A radioenzymatic method for the determination of tissue 10-formyltetrahydrofolate
Journal of Biochemical and Biophysical Methods
|June 1, 1986
Abstract:
A radioenzymatic method for the determination of tissue 10-formyltetrahydrofolate is described based on the stable ternary complex formed from methylenetetrahydrofolate, tritiated fluorodeoxyuridylate and thymidylate synthase. Tissue extract 10-formyltetrahydrofolate is deacylated with 10-formyltetrahydrofolate deacylase and the tetrahydrofolate formed is converted to methylenetetrahydrofolate using formaldehyde. Mouse tissue 10-formyltetrahydrofolate levels and their stability to extraction procedures are described.