266 



G. POPJAK 



SPECIFIC ACTIVITY OF MILK FATTY ACIDS 

 AFTER INJECTION OF 5 MC OF CH^'^CO^Na 



O- 12 HR. 



2-48 HR. 



8 lO 12 t4 16 18 18 



LENGTH OF 



4 6 8 lO 12 14 16 IB 18 



CARBON CHAIN 



Fig. 3. Specific activities of pure fatty acids obtained from milk 

 glycerides of a goat after the injection of 5 mc. CHg^^COONa. 



(Popjak, French, Hunter and Martin, 1951.) 



Table II 



Specific Activity (1 x 10"^ /xc. ^^C/mg. C) of Individual Carbon Atoms 



IN Acetic, Butyric, and Caproic Acids from Milk Glycerides after 



Intravenous Injection of 5 mc. of CHg^^COgNa 



i 



