Fig. 2

The radioresistant non-small cell lung cancer cells displayed the epithelial–mesenchymal transition phenotype. a The cells were photographed by light microscope at ×100 magnification. b Western blot analysis of E-cadherin and vimentin expression in A549, A549R, H1299, and H1299R cells. c The quantification of the protein levels in b **P < 0.01 (Student’s t test). d Western blot analysis of the dynamic change of the protein levels of E-cadherin, vimentin, phosphor-Chk2 (p-Chk2), and γ-H2AX during the accumulation of the radiation dose. e The quantification of the protein levels in d. *P < 0.05 (ANOVA-SNK-q′) versus the respective 0-Gy group