Amino Acid Screen, Blood
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To assist in diagnosing congenital metabolic disorders in infants, typically homocystinuria, maple syrup urine disease, phenylketonuria (PKU), tyrosinuria, and unexplained mental retardation.
Plasma collected in a green-top (heparin) tube.
(Method: Liquid chromatography/mass spectrometry) There are numerous amino acids. Values vary, and the testing laboratory should be consulted for corresponding ranges.