1. Marchionni, M. A. et al. Glial growth factors are alternatively spliced erbB2 ligands expressed in the nervous system. Nature 362, 312–318 (1993).
2. Dong, Z. et al. Neu differentiation factor is a neuron-glia signal and regulates survival, proliferation, and maturation of rat Schwann cell precursors. Neuron 15, 686–596 (1995).
3. Zorick, T. S. & Lemke, G. Schwann cell differentiation. Curr. Opin. Cell Biol. 8, 870–876 (1996).
4. Carraway, K. 3. et al. The erbB3 gene product is a receptor for heregulin. J. Biol. Chem. 269, 14303–14306 (1994).
5. Sliwkowski, M. X. et al. Coexpression of erbB2 and erbB3 proteins reconstitutes a high affinity receptor for heregulin. J. Biol. Chem. 269, 14661–14665 (1994).