Cancer is a disease involving uncontrolled cell growth, and carcinogenesis is usually linked to a series of changes in the activity of cell growth regulators.11 Cell cycle progression is strictly modulated by orchestrated actions of cyclins with cyclin‐dependent kinases (CDKs).12 The CDK‐like (CDKL) family has similar attributes to the CDK family but is not known to bind to cyclins. Here, PCNA is linked to cancer.