apolipoprotein concentrations were determined by enzyme immunoassay in whole serum and , in a subsample of seven subjects , in serum lipoprotein fractions of d less than 1.006 kg/l ( supernatant ) containing very low density lipoproteins ( vldl ) and chylomicrons and of d greater than 1.006 kg/l ( infranatant ) containing low density lipoproteins ( ldl ) and high density lipoproteins ( hdl ) .
C0023820
lipoprotein
C0008731
chylomicrons