Previously we reported that internalized ligand-receptor complexes are transported within the alveolar macrophage at a rate that is independent of the ligand and/or receptor but is dependent on the endocytic apparatus (Ward, D. M., R. S. Ajioka, and J. Kaplan. 1989. J. Biol. Chem. 264:8164-8170). To probe the mechanism of intracellular vesicle transport, we examined the ability of vesicles inte...
