when cells were doubly incubated , first in cf and then in hrp , both tracers were taken up ( often within the same endocytic vesicle ) , but they maintained their same destinations as when incubated in a single tracer alone : the content marker , hrp , was localized exclusively within the lysosomal system , whereas the membrane marker , cf , was found within elements along the secretory pathway as well as within lysosomes .
C0007634
cells
C0887883
endocytic vesicle