fractionation of secreted lipoproteins by ultracentrifugation revealed that the reduced secretion of triacylglycerol and phosphatidylcholine from choline-deficient cells was mainly due to impaired secretion of very low density lipoproteins ( vldl ) ( but not high density lipoproteins ( hdl ) ) .
C0023820
lipoproteins
C0023825
very low density lipoproteins