According to our early study, p42.3 may be involved in the regulatory pathway in the occurrence and development of gastric carcinoma and the regulatory pathway is as follows: Ras→Raf-1→MEK→MAPK kinase→MAPK→microtubule-associated protein→spindle protein→centromere protein→cell proliferation [11]. Here, SAPCD2 is linked to gastric carcinoma.