“…Differential expression of cell surface carbohydrates has been used extensively to distinguish among subsets of neurons in the developing and mature nervous system ( Sieber- Blum and Cohen, 1978;Grunwald et al, 1985;Streit et al, 1985;Yamamoto et al, 1985;Dodd and Jessell, 1986; Mori, 1986;Nakagawa et al, 1986;Regan et al, 1986;Bastiani et al, 1987;Blum and Barnstable, 1987;Schwarting et al, 1987;Doddet al, 1988; Mendez-* To whom correspondence should be addressed. Otero et al, 1988;Suchy et al, 1988;Alvarez et al, 1989;Ashton et al, 1990;Scott et al, 1990;Stainier et al, 1991;Schwarting et al, 1992). This approach has led to the identification of several developmentally regulated epitopes that are believed to mediate cellular interactions important for neural development, including neuronal migration, axon outgrowth and fasciculation, and recognition (reviewed by Yamamoto and Schwarting, 1992).…”