How does cyclin kinase affect cell division?

Cyclin-dependent kinases (CDKs) play a crucial role in regulating cell division by phosphorylating specific target proteins, which drives the progression of the cell cycle. The activity of CDKs is tightly regulated by cyclins, which are proteins that accumulate and degrade in a cyclical manner throughout the cell cycle. When cyclins bind to CDKs, they activate the kinases, allowing them to initiate processes such as DNA replication and mitosis. Proper regulation of CDKs is essential for orderly cell division, and dysregulation can lead to uncontrolled cell proliferation, contributing to cancer.