Especially, we investigated KLK6 mRNA and protein levels using qPCR and western blot analysis in normal and gastric tumor tissues, and in gastric tumor cell lines such as AGS, SNU-216, NCI-N87, SNU-620, SNU-668, SNU-638, SNU-1, SNU-484, and NUGC-3 (Figure 1C and 1D). This evidence concerns the gene KLK6 and gastric neoplasm.