CCNA2（cyclin A2），癌症关联基因，基因ID：890，该基因编码的蛋白属于高度保守的细胞周期蛋白家族，其成员作为细胞周期的调节因子。该蛋白结合并激活细胞周期蛋白依赖激酶2，从而促进通过g1/s和g2/m的转变。[由RefSeq提供，2016年8月]The protein encoded by this gene belongs to the highly conserved cyclin family， whose members function as regulators of the cell cycle. This protein binds and activates cyclin-dependent kinase 2 and thus promotes transition through G1/S and G2/M. [provided by RefSeq， Aug 2016]。