补体是由 Pfeiffer 与 Bordet 首先发现于189d年。它是人体血浆中存在的一组重要的蛋白酶系。1968年世界卫生组织已建议统一命名,现已知补体系统是由9个血清蛋白成分所组成,因补体的第1成分是由3个亚单位组成,因此,可以说补体系统含有11个蛋白成份。即 C_(1q),C_(1r),C_(1s),C_2,C_3,C_4,C_5,C_6,C_7,C_8,C_9。近年来已证明补 Complement was first discovered by Pfeiffer and Bordet in 189d. It is a group of important proteases that exist in human plasma. 1968 World Health Organization has proposed a unified naming, it is known that the complement system consists of nine serum protein components, because the first component of complement is composed of three subunits, it can be said that the complement system contains 11 protein components . That is, C_ (1q), C_ (1r), C_ (1s), C_2, C_3, C_4, C_5, C_6, C_7, C_8, C_9. In recent years has proved up