ENPP1 and cancer: HepG2 cancer cells showed a low but discernable expression level (4.8% positive population, the MFI of positive Ab versus isotype is 146 vs 113), while HEK293T (0.8% positive population, the MFI of positive Ab versus isotype is 289 vs 295), PC3 (1.1% positive population, the MFI of positive Ab versus isotype is 58.6 vs 57.7), and CHLA10 (0.78% positive population, the MFI of positive Ab versus isotype is 38 vs 46.7) showed practically no expression of ENPP1 (Figure 2A).