A new method for the fractionation of human plasma high density lipoprotein

We have devised a new method for the fractionation of human plasma high density lipoprotein (HDL). The HDL was chromatographed on DEAE-agarose columns using a continuous gradient of 0.06–0.15 M NaCl. The elution pattern obtained showed three phases, each with differing peptide composition. Examination of the three subfractions showed that each contained both apo A-I and apo A-II, but indifferent proportions. Subfraction 1 contained noapoC-II orC-III-1 and only a trace of apo C-III-2, subfraction 2 contained apo C-II and C-III-1 but no C-III-2, while subfraction 3 contained considerable apo C-III-2 with only traces of apo C-II or C-III-1.