ULBP1 and cancer: We further demonstrated that Ara-C/DS-mediated DNA damage translated into increased surface expression of various immune ligands on cancer cells, including MHC-1, as well as the NK cell-attracting MHC class 1 chain-related protein A and B (MICA) and UL16-binding proteins 1-62, 5 and 6 (ULBP1-62,5,6) [120], which are important ligands of the NKG2D receptor [176].