Figure 1. Levels of MTHFD2 in lung cancer tissues and cell lines. (A) Relative MTHFD2 gene expression of normal lung tissues and the different stages of lung cancer tissues. * and ** indicate p<0.05 and p<0.01, respectively using paired t-test, compared to normal group. (B) Relative MTHFD2 gene expression of normal lung cell line BEAS-2B and lung cancer cell lines A549, H1299 and H441. ** and *** indicate p<0.01 and p<0.001, respectively using one-way ANOVA, compared to normal cell line BEAS-2B. (C) Representative MTHFD2 protein expression in normal and lung cancer cell lines, where β-actin was loaded as relative control (D) Online Oncomine database-dependent (