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Plasma lipoproteins are spherical particles that contain varying
amounts of cholesterol, triglycerides, phospholipids, and proteins.
The phospholipid, free cholesterol and protein constitute the outer
surface of the lipoprotein particle; the inner core contains mostly
esterified cholesterol and triglycerides. These particles serve to
solubilize and transport cholesterol and triglycerides in the
bloodstream.
The relative proportions of protein and lipid determine the density of
these plasma lipoproteins and provide a basis for their classification.
The classes are: very low density lipoproteins
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