Adult sciatic nerve cross-sections. P0, MAG, and NCAM immunostaining of cross-sectioned sciatic nerves from heterozygous (A, C, E) and homozygous (B, D, F) adult mice is shown. Note a similar staining pattern is seen in heterozygote and homozygote with P0 (A, B) and MAG (C, D). NCAM gives a slightly different pattern in the homozygote (F) than in the heterozygote (E). Ten-micrometer cryostat sections; scale bar, 50 μm.