we investigated age- and sex-related differences in the structure and composition of two species of lipoproteins that contain apoprotein ( apo ) a-i ( a-i lp ) : lipoproteins containing apo a-i and apo a-ii ( lp a-i/a-ii ) , and lipoprotein containing apo a-i but no apo a-ii ( lp a-i ) , which were isolated by immunoaffinity chromatography .
C0023820
lipoproteins
C0065058
lp a