SOD1 and neoplasm: Mitochondrial protein degradation increased in tumour‐bearing wild‐type mice (wild‐type saline, 0.0204 ± 0.00159; wild‐type LLC, 0.167 ± 0.00157) and tumour‐bearing Sod1KO mice (Sod1KO saline, 0.0231 ± 0.00108; Sod1 KO LLC, 0.0645 ± 0.000631).