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Expression of L1lacZ (A, C, and E) and L1lacZΔN (B, D, and F) during development of olfactory sensory structures at P1 (A and B) and P5 (C–F). G, glomerular layer, M, mitral cell layer; OE, olfactory epithelium; OEC, olfactory ensheathing cells; ON, olfactory nerve layer.
