JOHN H. NORTHROP 



475 



§ 



to 

 o 



I). 



100 

 90 



80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 



14 8 16 32 64 96 128 



Total relative concentration pepsin 



Fig. 1. Curves showing pepsin concentration and rate of digestion {cf. Table 



TABLE I. 



Enzyme Concentration and Rate of Digestion. 



Pepsin solution. 10 per cent solution of Griibler's pepsin in HCl, pH 2.0. 



30 



V 



K = 1.2 d = 



