The researchers examined neurons from lab-grown samples ... These were not the previously known synaptic varicosities, where neurotransmitters are stored, but something entirely new.

and in green for dopaminergic and sertonergic neurons. The cell bodies are at the lower ventral part of the photos, and above the cell bodies is an extensive array of synaptic varicosities. To the ...

This image of an isolated hippocampal neuron from a rat shows that PGK1 is found out at nerve terminals (small varicosities) where it helps power synapses.