Expression of antioxidative markers in the RAW 264.7 cell culture. (A) Gene expression of antioxidation-related genes in LPS- and BSE-treated RAW 264.7 cells. (B) Expression of Nrf2 protein in RAW 264.7 cells after treatment with BSE or LPS. The graph shows the mean and the standard error of the mean as log2 scale. Statistical differences among the groups are showed using ‘a, b, and c’.