dihydrobiopterin

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

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di·hy·dro·bi·op·ter·in (di-hi″dro-bi-opґtər-in) a reduced pteridine derivative related to folic acid; its quinoid form is produced by oxidation of tetrahydrobiopterin in several biological hydroxylation reactions.

Medical dictionary. 2011.

Look at other dictionaries:

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  • Sepiapterin reductase — In enzymology, a sepiapterin reductase (EC number|1.1.1.153) is an enzyme that catalyzes the chemical reaction:7,8 dihydrobiopterin + NADP+ ightleftharpoons sepiapterin + NADPH + H+Thus, the two substrates of this enzyme are 7,8 dihydrobiopterin… …   Wikipedia

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