Cocaine- and Amphetamine-Regulated Transcript (CART) was localized in monkey retina.
The neuropeptide was expressed in two very similar types of GABAergic local circuit neurons.
These amacrine cells received excitatory input from rod bipolar cells and also inhibited them.
They resembled A17, waterfall and serotonin-accumulating cells in other mammals.
Primate retinal ganglion cells do not contain CART, unlike those in rodents.