in the plasma of 19-day fetuses , there is only one lipoprotein electrophoretic band which corresponds to the beta-lipoproteins of adults ( low density lipoproteins , ldl ) according to its mobility and floating characteristics , while in the fetus of 21 days there are also pre-beta-lipoproteins ( vldl ) .
C0023820
lipoprotein
C0023825
vldl