Two neurotransmitters—GABA and glutamate—are the primary chemical messengers of signals between nerve cells in the brain.

Never mind that glutamate and GABA do most of the work -; it's the thrill of dopamine as the "pleasure chemical" and serotonin as tender mood-stabilizer that attract all the headlines. Of course ...

The endocytotic molecules dynamin, clathrin, amphiphysin and synaptojanin are all present in Drosophila, as are the vesicular transporters for glutamate, dopamine, serotonin, GABA and acetylcholine.