592 



PHYSIOLOGICAL CHEMISTRY 

 CYSTINE DEFICIENCY DIET 



Diet i Diet 2 



Per cent Per cent 



Cooked Navy bean meal 1 



Cystine 



Salt mixture 



Butter fat 



Lard. . 



72.00 

 o.oo 

 4.00 



15.00 

 9.00 



80 



40 



days 



/20 



FIG. 183. CURVE SHOWING INFLUENCE OF A DEFICIENCY OF CYSTINE IN THE DIET. 

 (Johns and Finks: Journal of Biological Chemistry, 41, 379, 1920.) 



1 Navy bean meal cooked 3 hours with distilled water, dried and ground (John and 

 Finks: Jour. BioL Chem., 41, 375, 1920). Cystine may be prepared as described in Chap- 

 ter IV. 



