Predicted to enable potassium:proton antiporter activity and sodium:proton antiporter activity. Acts upstream of or within epithelial cell development and gastric acid secretion. Predicted to be located in cytoplasmic vesicle and vacuolar membrane. Predicted to be integral component of membrane. Predicted to be active in plasma membrane. Is expressed in several structures, including brain; gallbladder; genitourinary system; gut; and thymus. Orthologous to human SLC9A4 (solute carrier family 9 member A4). [provided by Alliance of Genome Resources, Apr 2022]