Cyclin-dependent kinase inhibitor 1B (CDKN1B)

Important regulator of cell cycle progression. Inhibits the kinase activity of CDK2 bound to cyclin A, but has little inhibitory action on CDK2 bound to SPDYA (PubMed:28666995).

Involved in G1 arrest. Potent inhibitor of cyclin E- and cyclin A- CDK2 complexes.