X Contents 



PAGE 



Discussion 



C. Heidelberger, E. Hammarsten, G. B. Brown . . 171 



The use of radiophosphorus in the study of the nucleic 



acids 



J. N. Davidson, md, dsc, frs.ed, Biochemistry Dept., 

 University of Glasgow . . . . . . .175 



Rate of synthesis and quantitative variations of the ribo- 

 nucleic acid during the grov^th of a culture of Polytomella 

 coeca 



R. Jeener, Dept. of Animal Physiology, Universite Libre 



de Bruxelles (presented by D. Szafarz) .... 184 



Discussion 



G. B. Brown, J. N. Davidson, C. P. Leblond, D. Szafarz, 



G. PopjAK ......... 188 



Part V— PROTEINS AND AMINO-ACIDS 



Chairman : A. S. McFarlane, ma, bsc, mb, chb 

 Editor : A. Neuberger, md, phd, frs 



A method for the evaluation of the rate of protein synthesis 

 in man 



D. RiTTENBERG, PhD, Dept. of Biochemistry, Columbia 

 University, New York . . . . . . .190 



Discussion 



A. Neuberger, D. Rittenberg*, . • • . . 201 



Turnover rates during formation of proteins and poly- 

 nucleotides in regenerating tissues 



E. Hammarsten, md, Dept. of Biochemistry, Karolinska 

 Institutet, Stockholm ....... 203 



Discussion 



D. Rittenberg, E. Ha:mmarsten, G. B. Brown . .211 



Synthesis of phenylalanine and tyrosine in yeast 



K. Bloch, PhD, Dept. of Biochemistry, University of 

 Chicago 213 



Discussion 



R. Bentley, H. R. V. Arnstein, E. E. Pochin, D. 

 Rittenberg, K. Block, H. A. Krebs, H. G. Wood . 224 



