glycosphingolipids added exogenously in cell culture are slowly incorporated into plasma membranes , inhibit cell growth , and modify growth behavior ( laine , r. a. , and hakomori , s. ( 1973 ) biochem . biophys . res . commun . 54 , 1039-1045 ; keenan , t. w. , schmid , e. , franke , w. w. , and wiegandt , h. ( 1975 ) exp . cell res . 92 , 259-270 ) .
C0007603
plasma membranes
C0007634
cell