As one of the important response gene to complement,response gene to complement-32 (RGC-32) simultaneously involves in many other biological functions.Recent studies have shown that RGC-32 was one of the critical regulatory factors at the G2/M check point in the cell cycles and involved in the cell cycle regulation.The expression products of RGC-32 gene play the key roles in cell proliferation,differentiation,inflammation,tumor metastasis and other processes.However,it has not been clarified in its biological mechanisms of regulation in cell cycle.This article takes a brief review about RGC-32 on its gene structure,biological functions,regulation of cell cycle,and the relationship of cell cycle regulation which involves in RGC-32.