Expanded Figure 3a: EM of Toh-IR amacrine cells: Toh-IR profiles presynaptic to bipolar axons, ganglion cell dendrites and amacrine cell profiles

a) Toh-IR processes are presynaptic to other Toh-IR processes (white arrow) and to a ganglion cell (GC) dendrite (black/white arrow) in S1. The GC dendrite is also postsynaptic to an unstained amacrine cell (A). A neighboring unstained amacrine cell (A) is presynaptic to another Toh-IR process.