We also tested GNF-5 and PPY-A, kinase inhibitors specific for ABL1, a cytoplasmic kinase known to be activated by RON (39, 40) and found that inhibiting either kinase mimics the effects of SSTNEGFR by significantly reducing EdU incorporation in HNSCC and TNBC cells, but not in NOKs or MCF10A cells (Fig. 3C). Here, ABL1 is linked to head and neck squamous cell carcinoma.