Figure 5:Immunohistochemistry analysis the experimental Cells p53 expression, Representative images (40X). A. P53 expression of BEAS-2B cells were 10.7 ± 2.3%. B. P53 expression of the 5th passages BEAS-2BNNK cells were 43.3 ± 5.7%. C. P53 expression of the 15th passages BEAS-2BNNK cells were 73.8 ± 5.2%. D. P53 expression of the 15th passages BEAS-2BNNK cells were92.4 ± 6.5%. B, C, D.VS.A. P<0.01.