Analysis of the figure shows that the activity of SOD was significantly lowered (p< 0.001) in the gastric mucosa of animals exposed to ethanol (Ulcer control) (2.56 ± 0.11 U/mg protein), when compared with the respective value in intact gastric mucosa (baseline) (5.80 ± 0.06 U/mg protein). Here, SOD1 is linked to ulcer disease.