CD226 and neoplasm: The tumor cell lines all variably express the DNAM-1 ligands CD112 and CD155 (Suppl Fig. 2), low levels B7-H6 (NKp30 ligand), while the NKG2D ligands MICA/B were expressed by HCT-15, HCT116, OVCAR-3, T-4D7, WM9, and DU145.