802 



ADVENTURES IN RADIOISOTOPE RESEARCH 



an increase in the glycogen content of the liver it will be revealed by 

 analytical data(2). If the glycogen content remains constant during the 

 experiment the increase in i^c content may be due to an increased rate 



E 

 E 



o 



J3 



£ 





U 



250 



300 



Fig. 2. Change of the i*C content of Uver dry tissue and" Uver 

 proteins of mice injected with NaCHg "CO^ with time. Each point 

 represents the value obtained for 10 or more pooled hvers. Values 

 obtained for mice of different ages and races were plotted solely to 

 demonstrate the great difference in the change of the i*C content of 

 the Hver tissue and hver proteins with time. 



2N. North and L. F. Nims, Fed. Proc. 8, 119 (1949); M. H. Ross and I. O. 

 Eley, J. cell. comp. Physiol. 37, 163 (1951). 



