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HelpTest Code LAB6607 Amino Acids, Branched Chain
Performing Section
Biochemical Genetics
Specimen Type
Serum or Plasma:
Light Green Top- Lithium Heparin (Preferred)
Red Top – Plain
Gold Top- SST
Dark Green Top-Sodium Heparin
Specimen Volume
Preferred: 0.9 mL (0.3mL serum/plasma)
Minimum: 0.6 mL (0.2 mL serum/plasma)
Processing Instructions
Green or Gold top-CENTRIFUGE per procedure / Red Top – Clot 60 minutes in upright position
Pipette off plasma or serum into pour off tube
Attach original tube to pour off tube with rubber band
Store and ship sample Frozen on dry ice.
Temperature
Frozen (dry ice)
Test Components
Valine
Isoleucine
Leucine
Alloisoleucine
Amino Acid, Branched Chain Result
Reference Range
Valine0 up to 1 month: 86-190 nmol/mL
1 month up to 2 years: 64-294 nmol/ mL
2 years up to 18 years: 74-321 nmol/mL
18 years and up: 119-336 nmol/mL
Isoleucine
0 up to 1 month: 26-91 nmol/mL
1 month up to 2 years: 31-86 nmol/mL
2 years up to 18 years: 22-107 nmol/mL
18 years and up: 30-108 nmol/mL
Leucine
0 up to 1 month: 48-160 nmol/mL
1 month up to 2 years: 47-155 nmol/mL
2 years up to 18 years:49-216 nmol/mL
18 years and up: 72-201 nmol/mL
Alloisoleucine
<2 nmol/mL
Amino Acid, Branched Chain Result
Normal, Interpretation to Follow
TAT
3 days
CPT
82136