The PKMYT1 (protein kinase, membrane associated tyrosine/threonine 1) gene expression is essential for disease progression of colorectal cancer and hepatocellular carcinoma. The action of Cdc2 (cyclin-dependent kinase 2), an essential molecule required for the induction of mitosis, is regulated by PKMYT1. PKMYT1 binds to the promoter regions of proteolipid proteins of the central nervous system and plays a role in the developing nervous system.