Fig. 2. Immunolabeling of insulin-secreting cells for insulin, SV2A and SV2C isoforms. INS-1E cells (A,C) and pancreatic ß-cells (B,D) were double-labeled with an antibody against insulin (green) together with anti-SV2A or anti-SV2C (red). The right-hand panels show the overlay of the corresponding green and red channels. Bars, 5 µm.