neuraminidase and galactosyltransferase were investigated in total golgi appartus and in the three fractions of increasing densities ( gf1 , gf2 , and gf3 ) isolated from the microsomal fraction of rat liver homogenates by flotation in a discontinuous sucrose density gradient ( ehrenreich , j.h. , bergeron , j.j.m. , siekevitz , p. and palade , g.e . ( 1973 ) j. cell biol . 59 , 45-72 ) .
C0018042
golgi
C0007634
cell