Is an ortholog of human SLC4A10 (solute carrier family 4 member 10)\; SLC4A7 (solute carrier family 4 member 7)\; and SLC4A8 (solute carrier family 4 member 8). Exhibits anion:anion antiporter activity and chloride transmembrane transporter activity. Is involved in cholinergic synaptic transmission\; regulation of GABAergic synaptic transmission\; and response to arsenic-containing substance. Is expressed in the alimentary system\; the head\; the muscular system\; and the nervous system.