Glutamate (neurotransmitter)
In neuroscience, glutamate refers to the anion of glutamic acid in its role as a neurotransmitter: a chemical that nerve cells use to send signals to other cells. It is by a wide margin the most abundant excitatory neurotransmitter in the vertebrate nervous system. It is used by every major excitatory function in the vertebrate brain, accounting in total for well over 90% of the synaptic connections in the human brain. It also serves as the primary neurotransmitter for some localized brain regions, such as cerebellum granule cells.
GABA transporter
GABA transporter group consists of six different transporters:GAT1 and GAT3 are the major GABA transporters in the brain and spinal cord, expressed by both neurons and some astrocytes. GAT2 and BGT1 are also expressed in the brain, but at low levels and mostly in the meninges. GAT2 also transports taurine, while BGT1 transports betaine. These two transporters are predominantly expressed in the liver, but are also found in the kidneys and, as mentioned above, in the meninges.