Levels of SOD in plasma in control group, sepsis group, sepsis+SO2 group, and SO2 group were 143 ± 9.45 U/mL, 124 ± 6.46 U/mL, 138 ± 14.22 U/mL, and 134 ± 8.91 U/mL, respectively. The gene discussed is SOD1; the disease is Sepsis.