Figure 5: MUC18 serine phosphorylation in polyI:C-stimulated normal human primary tracheobronchial epithelial (NHTE) cells that over-express MUC18. Cells were treated with or without polyI:C (10 μg/ml) for 15 minutes, followed by MUC18 immunoprecipitation and immunoblotting of phosphorylated serines.