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A cyclin-dependent kinase inhibitor protein is a protein which inhibits the enzyme
cyclin-dependent kinase Cyclin-dependent kinases (CDKs) are the families of protein kinases first discovered for their role in regulating the cell cycle. They are also involved in regulating transcription, mRNA processing, and the differentiation of nerve cells. They a ...
(CDK). Several function as tumor suppressor proteins.
Cell cycle The cell cycle, or cell-division cycle, is the series of events that take place in a cell that cause it to divide into two daughter cells. These events include the duplication of its DNA (DNA replication) and some of its organelles, and subs ...
progression is delayed or stopped by cyclin-dependent kinase inhibitors, abbreviated CDIs, CKIs or CDKIs. CDIs are involved in cell cycle
arrest An arrest is the act of apprehending and taking a person into custody (legal protection or control), usually because the person has been suspected of or observed committing a crime. After being taken into custody, the person can be questi ...
at the G1 phase. Seven cyclin-dependent kinase inhibitor proteins have thus far been identified. They are named by the small letter "p" followed by their molecular weight in kilodaltons. They are p15, p16, p18, p19, p21, p27, and p57.


Associated gene and target


References


External links

* Protein domains {{protein-stub