however , when pig plasma was supplemented with human lipoprotein-free plasma ( a source of esterified cholesterol transfer protein activity ) the presence of vldl in pre-incubations resulted in both a reduction in the esterified cholesterol content of the re-isolated vldl-deficient fraction and a markedly enhanced rate of cholesterol esterification in subsequent incubations of this fraction .
C0023820
lipoprotein
C0023825
vldl