FUS and amyotrophic lateral sclerosis: Immunohistochemical (Fig. 5b) and western blot analysis (Fig. 1d) of sciatic nerve also detected myc-hFUSR521C and -hFUSP525L, but not -hFUSWT in the periphery, confirming that ALS mutant FUS is selectively mislocalized to motor axons in the τMN mutants.