Within 48 h of administration of radiolabelled 10-formylfolate, folic acid and the polyglutamate derivative 10-formylfolate tetraglutamate to the rat, fragmentation products are found in the urine. The major catabolite was identified as p-acetamidobenzoate by chromatography and reverse isotope-dilution analysis.
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Connor et al. (1979) studied this question.
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