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Representative photomicrographs of thionin-stained control and axotomized facial motor nuclei 28 days after facial nerve axotomy. Control (A,C,E) and axotomized (B,D,F) facial motor nuclei of wild-type (WT; A,B), B6SJL WT (C,D), and presymptomatic SOD1 (E,F) mice. Scale bar = 100 μm in a–F.
