H(+)/Cl(-) exchange transporter 3 (CLCN3)

Mediates the exchange of chloride ions against protons. Functions as antiporter and contributes to the acidification of the endosome and synaptic vesicle lumen, and might thereby affect vesicle trafficking and exocytosis.

May play an important role in neuronal cell function through regulation of membrane excitability by protein kinase C. It might help neuronal cells to establish memory.