P27Kipl is a multifunctional cyclin depedent kinase inhibitor (CKI) that was found recently, and to be regarded as a negative regulative restraining gene of cyclin depedent kinase( CDK) for cell cycle.

• P27Kipl是近年发现的一个多功能细胞周期蛋白依赖激酶抑制剂(CKI),作为CDK的抑制因子对细胞周期实行负调控。