APOB 100

An apolipoprotein found in LDL, VLDL, and IDL. The ligand for the LDL receptor; absent in determined types of abetalipoproteinaemia. Apolipoproteins are proteins on the surface of the lipoprotein composite that bind to specific enzymes or transport proteins across the cell membrane. The usual range is 40 to 125 mg/dl. Elevated levels may be seen in familial combined hyperlipidaemia and acquired hyperlipidaemia. Elevation may also be seen in cases of acute angina and myocardial infarction.