Predicted to enable identical protein binding activity. Predicted to be involved in B cell differentiation and B cell proliferation. Predicted to act upstream of or within B cell receptor signaling pathway. Predicted to be located in external side of plasma membrane; membrane raft; and multivesicular body. Predicted to be part of B cell receptor complex. Human ortholog(s) of this gene implicated in agammaglobulinemia. Orthologous to human CD79A (CD79a molecule). [provided by Alliance of Genome Resources, Apr 2022]