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Elevated levels of cysteine proteases activity in Sod1−/− mice. a Caspase-3 activity measured at 11–16 months from hind-limb muscle (b) m-Calpain activity measured at 11–16 months from hind-limb muscle (c) Western blot quantification and representative image of calpain substrate, α-spectrin cleavage product (150 kDa)
