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Table 3: Composition of lipoproteins. |
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|
Lipoprotein |
Cholesterol (%) |
Triglycerides (%) |
Apolipoprotein(s) |
Density, g/L |
Size, nm |
|
Chylomicrons |
5 |
90 |
A-I, A-II, A-IV, B48, C II, E |
< 0.95 |
50-500 |
|
Remnants of chylomicrons |
Triglyceride content > cholesterol |
B48, E |
< 1.006 |
< 30 |
|
|
Variable relationship |
|
|
|
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|
Very low- density lipoprotein |
20 |
65 |
B100, C II, E |
< 1.006 |
30-80 |
|
Intermediate density lipoprotein |
35 |
30 |
B100, E |
1.006-1.019 |
25-35 |
|
Low-density lipoprotein |
50 |
10 |
B100 |
1.019-1.063 |
18-28 |
|
High-density lipoprotein (HDL2) (HDL3) |
15 |
5 |
A-I, A-II |
1.063-1.125 1.125-1.210 |
9-12 5-9 |
|
There is an inverse relationship between density and the size of the lipoproteins. Lipoproteins can be separated on those with atherogenic capacities (with apolipoproteins B100 or E), and those protectives (HDLs). Also, they are distinguished in triglyceride-rich lipoproteins (TRLs) and those that serve to transport cholesterol to the tissues and from these back to the liver (LDL and HDLs). Each lipoprotein is characterized for a type of apolipoproteins, situated in the particle cover, with several functions (see text). Modified from: Anonymous6, Gotto A et al.7 |
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