to permit separation of the hdl ( 1 ) from vldl , ldl , and lp ( a ) , the apob-containing lipoproteins were first precipitated from serum using the phosphotungstic acid/magnesium chloride ( pta/mgcl ( 2 ) ) method after which the supernatant fraction was subjected to zonal ultracentrifugation .
C0065058
lp ( a
C0023820
lipoproteins