atypical phenylketonuria

atypical phenylketonuria

(1) Dihydropteridine reductase deficiency, MIM 261630; phenylketonuria due to dihydropteridine reductase deficiency. 
(2)  Hyperphenylalaninemia due to impaired tetrahydrobiopterin (BH4) biosynthesis, MIM 261640.
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