tetrahydrobiopterin (BH4)-deficient hyperphenylalaninemia

An amino acid metabolic disorder that are characterized phenotypically by hyperphenylalaninemia, depletion of the neurotransmitters dopamine and serotonin, and progressive cognitive and motor deficits and that has_material_basis_in autosomal recessive mutation

An amino acid metabolic disorder that are characterized phenotypically by hyperphenylalaninemia, depletion of the neurotransmitters dopamine and serotonin, and progressive cognitive and motor deficits and that has_material_basis_in autosomal recessive mutations in the genes encoding enzymes involved in the synthesis or regeneration of BH4.