Apo A1 constitutes the major component of high density lipoprotein (HDL). Apo A1 is an activator of the enzyme lecithin:cholesterol acyltransferase and removes free cholesterol from extrahepatic tissues. Apo A1 concentrations correlate with high density lipoprotein cholesterol and thus low levels are a risk factor for coronary artery disease. Rarely, very low levels are seen in hereditary deficiency of LPA1.
|Male||:|| 0.96-1.76 g/L
SST (gold top) or serum (red top)