G Expression of Ki67 in the tumor xenografts of ME180-MXIV, ME180-YAP, and ME180-YAPS127A cells implanted in athymic nude mice. Ki67 was visualized using an Alexa-488 (green)-conjugated secondary antibody. Actin was visualized using an Alexa-594 (red)-conjugated secondary antibody. Nuclei were stained with DAPI. Scale bar: 20 μm. Note the significant increase in the Ki67-positive cells in the ME180-YAP and ME180-YAPS127A tumor xenografts. 