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. Author manuscript; available in PMC: 2012 Mar 7.
Published in final edited form as: J Comp Neurol. 2009 Nov 10;517(2):226–244. doi: 10.1002/cne.22158

Figure 3. The ectopic ON bipolar cell terminals in the OFF IPL express presynaptic markers.

Figure 3

A. Image of the OFF IPL in a vertical section of Grm6-EGFP retina immunostained for vGluT1 (red). Single confocal plane. Scale bar 20 µm. B – C. Split channels of the same image as in A, with arrowheads pointing to all EGFP ectopic terminals (green), which always colocalize with the vGluT1 labeling. D – F. Examples of Grm6-EGFP retinas counterstained with CtBP2 (red). Single confocal planes. Scale bar 10 µm. G – L. Split channels of the same images as in D – F. Circles mark all EGFP ectopic terminals that typically contain at least one synaptic ribbon. Arrowheads point to en passant ribbons within smooth primary ON bipolar cell axons. A magenta-green version of this figure is available online as a supplemental figure.