Compared with the control group (112.7 ± 5.0 nmol/min/mg), catalase activity was significantly increased by the exposure of mice to AF-WPS (171.0 ± 8.8 nmol/min/mg, P < 0.01) and SF-WPS (171.7 ± 19.6 nmol/min/mg, P < 0.01) but not by P-WPS (138.3 ± 6.5 nmol/min/mg) (Figure 6(b)). This evidence concerns the gene CAT and atrial fibrillation.