Apolipoprotein B
Test ID:
702783
CPT code:
82172
Synonyms:
Beta Apolipoprotein
Clinical Use:
LDL and its major protein, apolipoprotein B, play an essential role in lipid transport and metabolism. Apo B may regulate cholesterol synthesis through its interaction with specific cell membrane receptors and by inhibition of HMG Co A reductase. This enzyme has been identified as the rate controlling enzyme in cholesterol biosynthesis. Apo B may be important in the genesis of atherosclerosis and its quantitation useful in the evaluation of patients at risk for or having coronary atherosclerosis (CAD). High levels indicate increased risk for CAD.
Specimen Type:
Serum (preferred) or plasma
Requested Volume:
2 mL
Container Type:
Red-top tube, gel-barrier tube, green-top (heparin) tube, or lavender-top (EDTA) tube
Patient Preparation:
Patient must be fasting 12 to 14 hours.
Collection:
Separate serum or plasma from cells. Transfer specimen to a plastic transport tube.
Storage Instructions:
Maintain specimen at room temperature.
Stability Requirements:
Temperature |
Period |
---|---|
Room temperature |
14 days |
Refrigerated |
14 days |
Frozen |
14 days |
Freeze/thaw cycles |
Stable x3 |
Rejection Criteria
Specimen from nonfasting patient
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