3 to 5 mL blood in a GREEN top tube. Separate plasma and freeze within 2 hours. Serum or LAVENDER top tube is also acceptable if processed the same. CRITICAL Frozen: stable for 1 month. 1 to 2 mL ...

5 mL aliquot of urine, preferably obtained during acidosis or after overnight fast. If there is less than 3.0 mL, contact Biochemical Genetics lab before sending specimens. Freeze within 2 hours.