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Noun
phenylketonuria
PKU
Definition: a genetic disorder of metabolism; lack of the enzyme needed to turn phenylalanine into tyrosine results in an accumulation of phenylalanine in the body fluids which causes various degrees of mental deficiency
Definition: A metabolic disorder in which individuals lack the liver enzyme phenylalanine hydroxylase (PAH) which is needed to metabolize the amino acid phenylalanine.