Furthermore, WFDC21P expression was examined in GC cell lines and the normal gastric epithelium cell line GES-1 with qRT-PCR, and the results showed that the expression of WFDC21P in MKN-45, MGC-803, HGC-27, BGC-823, and SGC-7901 cell lines was significantly higher than that in GES-1 cell line (Fig. 1F). The gene discussed is WFDC21P; the disease is gastric cancer.