treatment of l1210 cells with 6-deoxy-6-fluoro-d-galactose in vitro or in vivo resulted in a specific , dose- and time-dependent decrease in the activity of cell surface sialyltransferase ( ectosialyltransferase ) but not of 5'-nucleotidase , a plasma membrane marker enzyme .
C0007634
cells
C0007603
plasma membrane