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apolipoprotein C3An 8.7-kD protein and major constituent of chylomicrons and VLDL. Apolipoprotein C3 is a cofactor for sphingomyelinase, an inhibitor of lipoprotein lipase; it may activate lecithin:cholesterol acyltransferase and modulate uptake of TG-rich remnants by hepatic receptors.
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