The composition of the major classes of plasma lipoproteins.
Although each of the lipoproteins is distinct with respect to its relative proportions of cholesterol, tnglycerides, phospholipids and apolipoproteins, considerable heterogeneity exists within each lipoprotein class. Lipoproteins are graded according to their density: very low (VLDL), low (LDL), intermediate (IDL) or high (HDL).
