SOD1 and Menkes disease: Compared with the NC group, the activities of CAT (Figure 7B), GPX (Figure 7C), and SOD (Figure 7D) in the serum of mice in the MD and HD groups were significantly (p < 0.05) increased, and SOD in the serum of mice in the HD group was significantly (p < 0.05) higher than that in the PC group.