Figure 2.

The residual activities of SOD, CAT, n(SOD) and n(CAT) at predetermined time points after the incubation with PBS (50 mM, pH 7.4) at 40 °C within 24 h (A and B), 50 μg/mL trypsin in PBS (pH 7.4) at 37 °C within 30 min (C and D) and PBS (pH 2.0) at 37 °C within 4 h (E and F). Data were expressed as mean value ± SD of triplicate experiments. *p < 0.05 and **p < 0.01.