Enables bicarbonate transmembrane transporter activity and chloride channel activity. Involved in bicarbonate transport and gastric acid secretion. Acts upstream of or within chloride transport. Located in basolateral plasma membrane. Is expressed in several structures, including alimentary system; brain; limb; respiratory system; and sensory organ. Orthologous to human SLC26A7 (solute carrier family 26 member 7). [provided by Alliance of Genome Resources, Apr 2022]