Predicted to enable antigen binding activity and immunoglobulin receptor binding activity. Predicted to be involved in several processes, including activation of immune response; defense response to other organism; and phagocytosis. Predicted to be part of immunoglobulin complex, circulating. Predicted to be active in external side of plasma membrane. Human ortholog(s) of this gene implicated in agammaglobulinemia. Orthologous to several human genes including IGLL5 (immunoglobulin lambda like polypeptide 5). [provided by Alliance of Genome Resources, Apr 2022]