Figure 11.

Transverse section through an OPN4–EGFP retina showing colocalization of EGFP fluorescence with sst₄ immunoreactivity. A, OPN4–EGFP retinas contain EGFP fluorescent (green) M1 ipRGCs. sst₄ immunoreactivity (red) is localized to RGC somata and to numerous processes throughout the IPL and RGC axons in the NFL. Inset B is magnified in B′ and B″ showing an M1 ipRGC dendrite ascending to stratum 1 of the IPL that is colabeled with sst₄ immunoreactivity. Inset C is magnified in C′ and C″, which shows colocalization between M1 ipRGC and sst₄ immunoreactivity in stratum 1 of the IPL. Arrows indicate the colocalized OPN–EGFP fluorescent process with sst₄ immunoreactivity. Scale bars: A, 20 μm; B, 5 μm; C, 10 μm.