studies have been performed to determine the proportion of the esterified cholesterol in high-density lipoproteins ( hdl ) , low-density lipoproteins ( ldl ) and very-low-density lipoproteins ( vldl ) that is attributable to a direct action of lecithin : cholesterol acyltransferase on each lipoprotein fraction .
C0023825
very-low-density lipoproteins
C0023820
lipoprotein