intermediate-density lipoprotein

lipoprotein /lipo·pro·tein/ (-prō´tēn) a complex of lipids and apolipoproteins, the form in which lipids are transported in the blood.

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α-lipoprotein , alpha lipoprotein one with electrophoretic mobility equivalent to that of the α1-globulins, e.g., high-density lipoprotein.

β-lipoprotein , beta lipoprotein one with electrophoretic mobility equivalent to that of the β-globulins, e.g., low-density lipoprotein.

floating beta lipoproteins  β.

high-density lipoprotein  (HDL) a class of plasma lipoproteins that promote transport of cholesterol from extrahepatic tissue to the liver for excretion in the bile; serum levels have been negatively correlated with premature coronary heart disease.

intermediate-density lipoprotein  (IDL) a class of lipoproteins formed in the degradation of very-low-density lipoproteins; some are cleared rapidly into the liver and some are degraded to low-density lipoproteins.

low-density lipoprotein  (LDL) a class of plasma lipoproteins that transport cholesterol to extrahepatic tissues; high serum levels have been correlated with premature coronary heart disease.

Lp(a) lipoprotein  a lipoprotein particle containing apolipoprotein B-100 as well as an antigenically unique apolipoprotein; its occurrence at high levels in plasma has been correlated with increased risk of heart disease.

pre-β-lipoprotein , pre-beta lipoprotein very-low-density lipoprotein

sinking pre-β-lipoprotein  Lp(a) l.

very-high-density lipoprotein  (VHDL) a class of lipoproteins composed predominantly of proteins and also containing a high concentration of free fatty acids.

very-low-density lipoprotein  (VLDL) a class of lipoproteins that transport triglycerides from the intestine and liver to adipose and muscle tissues; they contain primarily triglycerides with some cholesteryl esters.

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intermediate-density lipoprotein (IDL),

a lipid-protein complex with a density between those of very low-density lipoprotein and low-density lipoprotein. The product has a relatively short half-life and is normally in the blood in very low concentrations. In a type III hyperlipoproteinemic state the IDL concentration in the blood is elevated.