Original story from CNIOAccumulation of “junk proteins”: normal cells (left) and cells subjected to the effect of the toxic arginine-rich protein (right). In the latter, ribosomal proteins (green fluorescent) and the size of nucleoli (red) are increased.Credit: CNIO. Amyotrophic lateral sclerosis (ALS) is a degenerative disease. The neurons responsible for movement begin to die and...