the distribution of the discriminant values suggested three heterozygous phenotypes for phenylalanine hydroxylase deficiency , and the phenotypic combination of parents could be correlated to the phenotype of their affected offspring , i.e . classical phenylketonuria , mild phenylketonuria of hyperphenylalaninemia .
C0751434
phenylalanine hydroxylase
C0031485
phenylketonuria