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Cx45/Cx36 double-labeled gap junction adjacent to a ribbon of E-face particles / P-face pits (rectangles) that are found postsynaptic to ribbon synapses, which in IPL, are characteristic of rod and cone bipolar cells. Outer oval delineates the area with increased Cx45 labeling (12 and 11 5-nm gold beads, A vs. B), and the inner oval delineates the domain of Cx36 labeling (11 and nine 10-nm gold beads, A vs. B). P, P-face; E, E-face. Scale bars, 0.1 μm
