all three populations are rich in phospholipids ( 64.9 to 67.5 % ) and cholesterol ( 23.0 to 26.8 % ) but poor in cholesteryl esters ( 0.4 to 1.9 % ) , triglycerides ( 1.8 to 3.2 % ) , and protein ( 3.2 to 6.7 % ) with differences in chemical composition which result in buoyant densities ( 1.038 , 1.049 , and 1.058 , respectively ) to allow their separation .
C0008377
cholesterol
C0008387
cholesteryl esters