Predicted to enable ammonium channel activity. Predicted to be involved in ammonium homeostasis and ammonium transmembrane transport. Predicted to be located in membrane. Predicted to be active in plasma membrane. Human ortholog(s) of this gene implicated in Rh deficiency syndrome; hemolytic anemia; and overhydrated hereditary stomatocytosis. Orthologous to human RHAG (Rh associated glycoprotein).