Fig. 1

POU2F2 was highly expressed in human lung cancer tissues and cell lines, and correlated with the prognosis of lung cancer patients. a Representative images of POU2F2 expression level detected by Immunohistochemical (IHC) in lung cancer tissues and the corresponding normal tissues from three different patients (× 100 and × 200 magnification, respectively). b Immunoblot assays showed the expression levels of POU2F2 in lung cancer tissues and the corresponding normal tissues from three different patients. These images were analyzed with the Image J (National Institutes of Health, USA). Original image blots are presented in Additional file 1. c Immunoblot assays showed the expression levels of POU2F2 in 4 types of human lung cancer cell lines, including calu-3, calu-6, A549, and H1299, and a normal bronchial epithelial cell line BEAS-2B. These images were analyzed with the Image J (National Institutes of Health, USA). Original image blots are presented in Additional file 2. d Kaplan–Meier survival analysis was performed to analyze the correlation between POU2F2 expression and the survival fraction of 50 lung cancer patients. Results are presented as mean ± SEM, *p < 0.05, **p < 0.01