Fig. 6. Mammalian stress granules and vaultosomes do not colocalize. HeLa cells were incubated with 0.5 mmol l^–1 sodium arsenite for 15 min at 37°C (D–F) or left untreated (A–C). Fluorescence micrographs show HeLa cells stained with antibodies against the RNA-binding protein TIA-1 (A,D) or MVP (B,E). Three-color overlays are shown in C and F. Vaultosomes (arrowhead in D) do not colocalize with TIA-1 proteins. Bar, 20 µm.