Fig. 8. Effect of BFA treatment or K⁺-depletion on localization of syntaxin 3. Parotid lobules were incubated for 15 minutes with 10 µg/ml BFA (A) or in K⁺-free medium (B) prior to fixation. Tissue sections were stained with syntaxin 3 (red) and counterstained with BODIPY-phallacidin (green). Open arrowheads point to examples of fluorescent foci that have relocated to the luminal aspect of the actin band. Bar, 10 µm.