MST1R and neoplasm: Although we were unable to detect phosphorylated RON on frozen samples due to poor antibody sensitivity, we found that all tumor-containing samples (17/17; assessed by detection of the epithelial marker EpCAM) expressed RON, and all except one of those (16/17) also displayed active (phosphorylated) mTORC1 and/or rpS6 (Figure S17A).