Cyclins

**Definition:** A large family of regulatory proteins that function as accessory subunits to a variety of CYCLIN-DEPENDENT KINASES. They generally function as ENZYME ACTIVATORS that drive the CELL CYCLE through transitions between phases. A subset of cyclins may also function as transcriptional regulators.

**Tree numbers:** - D12.644.360.262 - D12.776.167.218 - D12.776.476.262

**Synonyms:** - Cyclin