Hyperphenylalaninemia is a medical condition characterized by mildly or strongly elevated levels of the amino acid phenylalanine in the blood. Severe hyperphenylalaninemia results in phenylketonuria (PKU). Phenylalanine concentrations ([phe]) are routinely screened in newborns by the Guthrie test, which takes a few drops of blood from the heel of ...
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http://en.wikipedia.org/wiki/Hyperphenylalaninemia
(from the article `phenylketonuria`) ...for phenylalanine hydroxylase activity. Autosomal recessive defects in enzymes that synthesize tetrahydrobiopterin or that restore its catalytic ...
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http://www.britannica.com/eb/a-z/h/91
(hi″pәr-fen″әl-al″ә-nĭ-ne´me-ә) an excess of phenylalanine in the blood, as in phenylketonuria.
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http://www.encyclo.co.uk/local/21001
Type: Term Pronunciation: hī′pĕr-fen′il-al-ă-ni-nē′mē-ă Definitions: 1. The presence of abnormally high blood levels of phenylalanine, which may be associated with elevated tyrosine levels, in newborn infants (premature and full-term), associated with the heterozygous state of phenylketonuria, materna...
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http://www.medilexicon.com/medicaldictionary.php?t=42513
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