Jejunal tissues and cultured cells were lysed, and the extracted proteins were analyzed. The primary antibodies used for Western blot were rabbit anti-Mst1 (1:1000; Cell Signaling), anti-p-Mst (1:1000; Cell Signaling), anti-Lats1 (1:1000; Cell Signaling), anti-p-Lats (Yu et al. 2010 (link)), anti-YAP (1:1000 [Cell Signaling, #4912], 1:1000 [Santa Cruz Biotechnology, H-9 and 63.7], and 1:1000 [Novus, NB110-58358]), anti-p-YAP (S127; 1:1000; Cell Signaling), anti-p-YAP (S381; 1:1000; Cell Signaling) (Kim et al. 2013 (link)), anti-β-catenin (1:2500; Sigma), anti-YAP/TAZ (1:1000; Cell Signaling), anti-Axin2 (1:1000; Cell Signaling), mouse anti-APC (1:200; Calbiochem, Ab-1), anti-Flag (1:5000; Sigma, M2), anti-HA (1:5000; Sigma), anti-Myc (1:2000; Calbiochem), anti-Actin (1:5000; Millipore), and rat anti-Flag (1:2000; BioLegend, L5). Signals were quantified by ImageJ.