Contents ix 



PAGE 



Discussion 



L. H. Gray, A. Hollaender, M. Gordon, B. E. Holmes, 

 H. A. Sloviter, a. S. Parkes, J. F. Loutit, L. F. 

 Lamerton ......... 109 



Effect of X-rays on nucleic acid and protein synthesis in 



the Jensen rat sarcoma 



Barbara E. Holmes, PhD, Dept. of Radiotherapeutics, 

 University of Cambridge . . . . . . .114 



Discussion 



R. J. BoscoTT, B. E. Holmes, G. B. Brown . . . 120 



Radiation dose in tracer experiments involving auto- 

 radiography 



S. R. Pelc, PhD, Radiotherapeutic Research Unit of the 

 Medical Research Council, Hammersmith Hospital, London 122 



Discussion 



L. F. Lamerton, S. R. Pelc, L. H. Gray, A. Hollaender, 



B. E. Holmes 136 



Synthesis of deoxyribose nucleic acid and nuclear incor- 

 poration of ^^S as shown by autoradio graphs 



Alma Howard, PhD, and S. R. Pelc, PhD, Radiotherapeutic 

 Research Unit of the Medical Research Council, Hammer- 

 smith Hospital, London . . . . . . .138 



Discussion 



C. Heidelberger, a. Howard, C. P. Leblond, G. 

 PopjAK, S. R. Pelc, G. B. Brown, B. E. Holmes, A. S. 

 McFarlane ........ 148 



Part IV— NUCLEIC ACIDS 



Chairman : A. S. McFarlane, ma, b.sc, mb, chB 

 Editor : J. N. Davidson, md, dsc, frs.ed 



The biosynthesis of pyrimidines irt vitro 



D. Wright Wilson, Pho, Dept. of Physical Chemistry, 

 University of Pennsylvania ...... 152 



Discussion 



E. Hammarsten, K. Aterman, A. Neuberger, D. W. 

 Wilson ......... 162 



Studies with organic- and bio- synthetic nucleosides and 

 nucleotides 



G. B. Brown, phD, Sloan-Kettering Institute, New York . 164 



