Probable sodium-dependent amino acid/proton antiporter, could be a neuronal transporter for glutamate. Colocalizes with synaptotagmins and SNAP25. Expressed exclusively in neurons and not in astrocytes and glia cells. Highly expressed in the synapse. Highly expressed in glutamatergic neurons. Primarily expressed in excitatory neurons, with some minor expression in inhibitory neurons. Belongs to the amino acid/polyamine transporter 2 family.