400 



ADVENTURES IN RADIOISOTOPE RESEARCH 



Increment in the Specific Activitie.s between 

 1 HorR AND 4 Horns 



^^P content of the liver fractions 



As in the case of mammalia, in the frog the liver phosphate interacts 

 at a much faster rate with the plasma phosphate than does the muscle 

 phosphate. The fast rate of renewal of the acid soluble P compounds 



Table 21. — Specific Activity of the Phosphorts 



Fractions Extracted from the Organs of the Frog 



Kept at 15° and the Organs of the Rabbit 10 Hoirs 



after Administration of Labelled Phosphate 



Fraction 



Specific activity 



Frog 



Rabbit 



Plasma 



Gastrocnemius inorganic P 



Gastrocnemius total acid soluble P 



Liver inorganic P 



Liver pyrophosphate P , 



Liver hexosemonophosphate P . . . . - 



Liver residual acid soluble P , 



Liver phosphatide P 



Table 22. — Distribution of ^^p between 

 Plasma and Corpuscles of the Frog 



Time of experi- 

 ment hours 



Distribution ratio of ^-1' 

 between corpuscle and 

 plasma of equal weight 



and the very slow renewal of the phosphatides of the liver of the frog 

 are seen in Table 21. This table contains also corresponding data for the 

 P fractions of the rabbit. 



