Enables chemorepellent activity. Acts upstream of or within several processes, including intracellular signal transduction; mammary placode formation; and regulation of cell migration. Predicted to be located in extracellular region and plasma membrane. Predicted to be integral component of membrane. Predicted to be active in extracellular space and glutamatergic synapse. Is expressed in several structures, including epidermis; mammary gland primordium; nervous system; testis; and trunk mesenchyme. Used to study schizophrenia. Orthologous to human NRG3 (neuregulin 3). [provided by Alliance of Genome Resources, Apr 2022]