168 



MICROSOMAL PARTICLES 



tightly together, probably through hydrogen bonds. Removal of magnesium 

 ions and hydrolysis of RNA from the particles labeled with C 14 -amino acids in 

 the cell did not liberate labeled amino acid or protein (s) of high specific activity 

 from the particles. 



REFERENCES 



1. P. O. P. Ts'o, J. Bonner, and J. Vino- 

 grad, /. Biophys. Biochem. Cytol., 2, 451 

 (1956). 



2. Fu-Chaun Chao and H. K. Schach- 

 man, Arch. Biochem. Biophys., 61, 220 

 (1956). 



3. M. E. Petermann and M. G. Hamil- 

 ton, /. Biol. Chem., 224, 725 (1957). 



4. Fu-Chaun Chao, Arch. Biochem. Bio- 

 phys., 70, 426 (1957). 



5. J. S. Wieberg and W. F. Neuman, 

 Arch. Biochem. Biophys., 72, 66 (1957). 



6. C. W. Carr, Arch. Biochem. Biophys., 

 43, 147 (1953). 



7. J. W. Littlefield, E. B. Keller, J. Gross, 

 and P. C. Zamecnik, /. Biol. Chem., 217, 

 111 (1955). 



8. H. Borsook, /. Cellular Comp. Phy- 

 siol., 47, Supplement 1, 35 (1956). 



