“…Beginning at 15 days after birth, it can be detected in the globus pallidus, endopeduncular nucleus, substantia nigra pars reticulata, ventral pallidum, islands of Calleja complex, and to a lesser extent in the stria terminalis and layers I-V of cerebral cortex of rats (Fallon et al, 1984). The EGF receptor, which also binds transforming growth factor-a (TGF-a) (Marquardt et al, 1983) is also present in mammalian brain (Adamson and Meek, 1984;Gomez-Pinilla et al, 1988;Heldin et al, 1979;Hiramatsu et al, 1988;Leutz and Schachner, 1982;Sadiq et al, 1985;Simpson et al, 1982;Werner et al, 1988). Studies have shown the EGF receptor to be present on glia (Heldin et al, 1979;Simpson et al, 1982;Leutz and Schachner, 1981;Nieto-Sampedro and Broderick, 1989), neurons (Werner et al, 1988), or both (Gomez-Pinilla et al, 1988;Leutz and Schachner, 1982;Wang et al, 1989).…”