Modern Automated Amino Acid Analyzer
PKU Panel; Amino Acids; Aminos; Threonine
Serum or Plasma
UCSD Biochemical Genetics
2 mL Blood
Light Green (Lithium Heparin PST)
Plasma collected in sodium heparin (dark green-top) tube is also acceptable. Serum collected in a red-top or serum separator tube (SST) is also acceptable but only as an alternative if needed.
1 mL Serum or Plasma
0.5 mL Serum or Plasma
Centrifuge, separate serum or plasma within 20 minutes, and promptly freeze. Complete UCSD Biochemical Genetics requisition and submit with specimen frozen.
Be aware that for accurate determination of homocystine in blood, special handling is required and may need to call UCSD Biochemical Genetics to arrange specifically for plasma homocystine. Amino Acids and PKU Panel include the same tests.