Figure 6.

The processes of Gβ3-positive bipolar cells and glucagonergic amacrine cells are closely associated within the middle of the IPL. Vertical sections of the retina were labeled with antibodies to Gβ3 (green) and glucagon (red). Arrows indicate the somata of glucagonergic amacrine cells and arrowheads indicate glucagonergic processes that are closely apposed to the axon terminals of Gβ3-positive bipolar cells within sublamina 3 (S3) of the IPL. Confocal microscopy was used to obtain high-resolution images. Images were made by projecting 3 optical sections (a and b) or 2 optical sections (c). The calibration bar in each panel represents 50 µm.