Clonogenic survival of NS, (○) or β-catenin shRNA, (●) BxPC3, (A) and Panc1, (B) cells. Clonogenic survival of empty vector control, (○) or β-cateninS33YFLAG (●) Panc1 cells, (C). Error bars are SD of three independent experiments performed in triplicate and are smaller than the symbols at some data points.