Figure 1: Western blot showing MUC18 protein over-expression (OE) in cultured normal human primary tracheobronchial epithelial (NHTE) cells. NHTE cells were transduced with MUC18 cDNA or green fluorescence protein (GFP) gene (control) encoded in replication-deficient lentivirus. Cells were harvested after 72 hours of lentiviral infection to confirm MUC18 protein overexpression.