Predicted to enable ErbB-3 class receptor binding activity; epidermal growth factor receptor binding activity; and epidermal growth factor-activated receptor activity. Predicted to be involved in several processes, including epidermal growth factor receptor signaling pathway; intracellular signal transduction; and regulation of synapse organization. Predicted to be located in extracellular region. Predicted to be active in extracellular space. Is expressed in epidermis; heart; mammary gland primordium; nervous system; and surface ectoderm. Orthologous to human NRG2 (neuregulin 2). [provided by Alliance of Genome Resources, Apr 2022]