Vascular endothelial growth factor B improves impaired glucose tolerance through insulin-mediated inhibition of glucagon secretion

Figure 3 Effects of vascular endothelial growth factor B on the cellular structure of islet. A: The HE staining of the pancreas under the light microscope (scale bar = 200 μm and 50 μm); B: The ultrastructure of the islet cell under the transmission electron microscope (scale bar = 5 μm and 2 μm); C: The immunofluorescence of islet cells under the fluorescence microscope (scale bar = 50 μm). HFD: High-fat diet; SD: Standard diet.