Predicted to enable identical protein binding activity. Predicted to be involved in B cell differentiation and B cell receptor signaling pathway. Predicted to act upstream of or within response to bacterium. Predicted to be located in cytosol; nucleoplasm; and plasma membrane. Predicted to be part of B cell receptor complex. Predicted to be active in external side of plasma membrane. Human ortholog(s) of this gene implicated in agammaglobulinemia. Orthologous to human CD79B (CD79b molecule). [provided by Alliance of Genome Resources, Apr 2022]