RIBONUCLEIC ACIDS 



54. Schmidt, G., R. Cubiles, B. H. Swartz, and S. J. Thannhauser, J. Biol. 

 Chem., 170,1 b9{\9Al). 



55. Schmidt, G., R. Cubiles, and S. J. Thannhauser, J. Cellular Comp. 

 Physiol., 38, Suppl. 1, 61 (1951). 



56. Schmidt, G., R. Cubiles, N. Zollner, L. Hecht, N. Strickler, K. Serai- 

 darian, M. Seraidarian, and S. J. Thannhauser, J. Biol. Chem., 192, 715 

 (1951). 



57. Schmidt, G., M. Seraidarian, K. Seraidarian, and S. J. Thannhauser, 

 Federation Proc, 11, 283 (1952) (as modified by personal communication 

 from G. Schmidt). 



58. Schmitz, H., W. Hart, and H. Ried, Z. Krebsforsch., 60, 301 (1955). 



59. Schmitz, H., R. B. Hurlbert, and V. R. Potter, J. Biol. Chem., 209, 41 

 (1954). 



60. Smith, K. C, and F. W. Allen, J. Am. Chem. Soc, 75, 2131 (1953). 



61. Strominger, J. L., H. M. Kalckar, J. Axelrod, and E. S. Maxwell, 

 J. Am. Chem. Soc, 76, 6411 (1954). 



62. Volkin, E., and W. E. Cohn, J. Biol. Chem., 205, 161 (1953). 



63. Whitfeld, P. R., L. A. Heppel, and R. Markham, Biochem. J. {London), 

 60, 15 (1955). 



64. Whitfeld, P. R., and R. Markham, Nature, 171, 1151 (1953). 



65. Zamecnik, P. C, personal communication. 



66. Zamecnik, P. C, and E. B. Keller, J. Biol. Chem., 209, 337 (1954). 



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