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MICROSOMAL PARTICLES 



Fig. 1. An electron micrograph of a thin section of E. coli, taken by L. Caro. The 

 ribosome granules can be seen in the body of the cell. The inner region, presumed to 

 contain DNA, can be seen, and the structure of the cell wall is also apparent. 



is a schematic drawing of the escape process, in which one of the ribosomes 

 is indicated as present in a region 1000 A square and 100 A deep, with the 

 appropriate energy releases accompanying it. On the left is the effect produced 

 by 10,000 r, and the microsomal particle is shown to scale with the single ioniza- 

 tion which is to be expected accompanying it. According to the studies of 

 Hutchinson [6], in a cell containing the normal proportion of water there can 



