Figure 7.

Cx50 plaques occur where fine A-type horizontal cell dendrites converge under cone pedicles. A, A-type HCs were filled with Neurobiotin to visualize the finer dendrites. Cx50 labeling was confined to the A-type HC network. Larger Cx50 plaques occurred at the intersection of major dendrites. Small Cx50 puncta occur where fine dendrites meet, often at terminal clusters associated with cones. B, High-resolution view of a terminal cluster (circle). Cx50 labeling is seen where fine dendrites converge underneath the cone pedicle. Scale bars: A, 10 μm; B, 5 μm.