Fig. 6. Expression of p53 and p21/WAF1 tested by ELISA in A549cells. A549 cells were incubated with or without TV (15 μM) for 3, 6, 12, 24, and 48 h. (A) The level of p53 in A549 cells, (B) the amount of p21/WAF1 in A549 cells. Each value is the mean ± S.D. of three independent experiments. *p<0.05, **p<0.01 vs. controls.
