Plasma lipids are measured after 12 hours fasting.
Total plasma lipids range from 400-700 mg/dl.
Apolipoprotein-A includes apo-AI and apo-AII.
Apo-AI in HDL is an activator of LCAT enzyme.
Apolipoprotein-B has two types: apo-B48 for chylomicrons and apo-B100 for LDL and VLDL.
Apo-B48 is synthesized in the intestine, and apo-B100 is synthesized in the liver.
Apolipoprotein-C includes apo-CI, apo-CII, and apo-CIII.
Apo-CII is transferred from HDL to chylomicrons and VLDL and is an activator of plasma lipoprotein lipase.
Apolipoprotein E is found in VLDL, HDL, chylomicrons, and chylomicron remnants.
Apo E accounts for 5-10% of total VLDL apolipoproteins in normal subjects.

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