Medical Term:

dihydrobiopterin

Pronunciation: dī-hī′drō-bī-op′tĕr-in

Definition: Precursor to tetrahydrobiopterin, a required cofactor for a number of enzymes, including the biosynthesis of l-tyrosine; the inability to synthesize dihydrobiopterin can result in a form of malignant hyperphenylalaninemia.

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