Cyclin-A2 (CCNA2)

Cyclin which controls both the G1/S and the G2/M transition stages of the cell cycle. Functions through the formation of particular serine/threonine protein kinase holoenzyme complexes with the cyclin-dependent protein kinases CDK1 or CDK2.

The cyclin subunit confers the substrate specificity of these complexes and differentially interacts with and activates CDK1 and CDK2 through the cell cycle. .