Abstract:
:Hyperphenylalaninemia due to dihydropteridine reductase deficiency results from the inability to maintain the aromatic amino acid hydroxylase cofactor, tetrahydrobiopterin, in its reduced or active form. Diagnosis of the disease is usually made by direct enzymatic assay on liver biopsies or in cultured skin fibroblasts. Evidence is presented that normal children and classic phenylketonuric children excrete mainly tetrahydrobiopterin in their urines, whereas children with dihydropteridine reductase deficiency excrete only oxidized forms of biopterin. Details of a rapid high performance liquid chromatographic assay for the measurement of the various forms of biopterin in urine are presented. This assay can be used to screen for suspected dihydropterine reductase mutants.
journal_name
Pediatricsjournal_title
Pediatricsauthors
Milstien S,Kaufman S,Summer GKsubject
Has Abstractpub_date
1980-04-01 00:00:00pages
806-10issue
4eissn
0031-4005issn
1098-4275journal_volume
65pub_type
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