Local accumulations of the cytoskeletal protein neurofilament L in axonal swellings showed a trend towards being more frequent in of KIF5A –/– motor neurons (12.4 ± 5.1 % of cells), in comparison to KIF5A +/– (9.3 ± 1.0 % of cells), and KIF5A +/+ (4.3 ± 4.0 % of cells) motor neurons, but the difference did not reach statistical significance (Fig. 2 ).
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