Predicted to enable receptor ligand activity. Predicted to be involved in positive regulation of isotype switching to IgA isotypes. Predicted to act upstream of or within immunoglobulin mediated immune response; positive regulation of cell population proliferation; and positive regulation of germinal center formation. Predicted to be located in cytoplasm and external side of plasma membrane. Predicted to be active in extracellular space. Human ortholog(s) of this gene implicated in B-lymphoblastic leukemia/lymphoma. Orthologous to human TNFSF13 (TNF superfamily member 13). [provided by Alliance of Genome Resources, Apr 2022]