,47 5 i 



L 



\51 







\7IO 



\ 

 s70( 



\49C 





v647 



\p4/( 



V52/<; 



\ 



Ze/n 



Food 



Days 



FIGURE 11. EXPERIMENTS WITH ZEIN. Neither growth nor main- 

 tenance can be secured when zein is the sole protein in the dietary. [From 

 the Journal of 'Biological Chemistry, volume 17.] 



