To elucidate the role of KIF23 in gastric carcinogenesis, we first analyzed KIF23 expression among 6 GC cell lines, and high KIF23 levels were observed in SGC-7901 and MGC-803, but low KIF23 levels were observed in MKN-45 and BGC-823 (Supplementary Figure 2A and 2B). Here, KIF23 is linked to gastric cancer.