Indeed, absolute quantitation using digital droplet PCR (ddPCR) demonstrated that there were ~80 and ~100 REG1CP molecules per HT-29 and LIM1215 colon cancer cell, respectively, compared with ~15 REG1CP molecules per normal colon epithelial (FHC) cell (Fig. 1g). This evidence concerns the gene REG1CP and malignant colon neoplasm.