多肽链在核糖体上的合成可以分三个阶段:合成的起始,多肽链的延伸及多肽链合成的终止。多肽链合成的起始,是个非常复杂的过程,人们发现有许多必不可少的旦白质因子参予此过程,它们被称为起动因子。为了了解每个因子的作用,从1973年开始,Schreier.M.H.,Merrick.W.C和Eenne.R.等从兔网织RBC中提出7种起动因子。1979年Hane Trachsel等从KrebsⅡ腹水细胞中也分离出7种起动因子。各种实验 The synthesis of polypeptide chains on the ribosome can be divided into three stages: the initiation of synthesis, the extension of the polypeptide chain and the termination of the synthesis of the polypeptide chain. The initiation of polypeptide chain synthesis is a very complicated process. It has been found that many essential factors contribute to this process. They are called initiators. In order to understand the role of each factor, starting from 1973, Schreier.M.H., Merrick.W.C. and Eenne.R. et al. proposed seven starting factors from rabbit reticulocyte RBCs. In 1979 Hane Trachsel et al. also isolated seven promoters from KrebsII ascites cells. Various experiments