TP53 and gastric cancer: We further classified all seven gastric cancer cell lines based on the p53 mutation status: MKN45 (p53-wildtype), AGS (p53-wildtype), SNU1 (p53-wildtype), MKN28 (p53-mutant), NCI-N87 (p53-mutant), SNU16 (p53-mutant) and KATO III (p53-deficient; Matozaki et al, 1992; Yokozaki, 2000; Jiang et al, 2001).