Thompson R A, Lachmann P J
J Exp Med. 1970 Apr 1;131(4):629-41. doi: 10.1084/jem.131.4.629.
This paper describes the characteristics of the indicator factor (I) which takes part in reactive hemolysis and its identification as the seventh component of complement. I was shown to be a beta globulin with a sediment coefficient of 5.7S and a molecular weight of about 140,000. Experiments on the depletion of I activity with anti-I antiserum or with activated R euglobulin showed that I was a late acting complement component necessary for the lysis of cells after the EAC142 stage. Complement component analysis of purified I fractions excluded all known components except C7. The physicochemical characteristics of I are compatible with published data on C7. The method of quantitation described represents a convenient method of testing for C7.
本文描述了参与反应性溶血的指示因子(I)的特性,并将其鉴定为补体的第七成分。已证明I是一种β球蛋白,沉降系数为5.7S,分子量约为140,000。用抗I抗血清或活化的R优球蛋白耗尽I活性的实验表明,I是EAC142阶段后细胞裂解所必需的晚期补体成分。对纯化的I组分进行补体成分分析,排除了除C7之外的所有已知成分。I的物理化学特性与已发表的关于C7的数据相符。所描述的定量方法是一种检测C7的简便方法。