[Regulation of the expression of Escherichia coli genes coding for the proteins involved in translation].

We have described our present knowledge of the regulation of the expression of genes whose products are concerned with the protein biosynthesis in E. coli. In particular, we have discussed the mechanism of translational initiation which seems to be a crucial control point. Our own work on the organisation and regulation of the expression of a group of E. coli genes coding for initiation factor IF3 and two aminoacyl-tRNA synthetases was described in detail. This work illustrates the power of the new genetic engineering technology in studies on regulation at the molecular level.