Conversion of Diopterin and Teropterin into Folic and Folinic Acid Activity by the Rat Liver.

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Abstract
Summary Isolated rat livers were perfused with blood containing equimolar concentrations of PGA, Diopterin, and Teropterin. Both conjugates gave rise to folic and folinic acid activity. Teropterin, a gamma-conjugate, was a more effective precursor for folinic acid than Diopterin, an alpha-conjugate.