68 THE CHEMICAL CONSTITUTION OF THE PROTEINS 



atmospheres, by which the cell enzymes are obtained. A large number 

 of polypeptides were employed for determining the nature of these 

 enzymes in the hope of finding differences between them, and dividing 

 the proteoclastic enzymes into definite groups, since we regard enzymes 

 as being extremely selective in their nature, and in the hope also of 

 determining in which organ the hydrolysis of any particular polypep- 

 tide took place. The results are given in the following tabulation : 



