Fig. 3. Taste receptor cells stained with dextrans. (A) Taste receptor cell stained with L-cysteine (100 mmol l^–1) + 3 kDa dextran Texas Red (20 µmol l^–1; 5 min). (B) A taste receptor cell stained with L-cysteine (100 mmol l^–1) + 40 kDa dextran fluorescein (20 µmol l^–1, 5 min). The images are z-projections taken using a fluorescence microscope with 2.5 µm distance. Processed by ImageJ with the stack parameter `max intensity'.