PI i:\li NT8, OR Bl 



sin. etc. are Inoculated in animals, they caus< 



appear in the I » 1 < »< »< I of the inoculated animal. Thu en antirennin 



sfniiii is added i<» milk it greatly hinders clotti 



addition of rennin. It is probable thai powerful antienzyme 



duced in the animal body for the purpose of protecting th< 



attack by enzymes. It is on accounl of the pr< 



thai intestinal parasites can exist in the i 1 the immunity 



From digestion which the mucosa of th< itinal I 



is believed to be due to the Bame cause. Bui ti doubt 



regarding this claim. Fresh pancreatic juice when ii 



empty intestine < 1 i -_ r i • s t -, its walls. When f I is present in the ii I 



tine it evidently prevents digestion of the walls by diverting ti 

 to itself. 



Types of Enzyme 



Saving learned something aboul the genera] nature 



• may QOW turn our attention I rtain details that have a ]>; 



importance. In the first place, with regard to nomenclature, in the 



earlier work cadi newly discovered enzyme received a which \ 



often quite inappropriate. .Many of these names ai 



pepsin, trypsin, ptyalin, etc., bu1 it is now- customar the 



enzyme according to the Bubstance on which it acl I is is d 



by replacing the last part of the name of the Bubsl >n by the 



termination -ase for example, the enzyme which inverts ma I " I * * « 1 



maltase . <>r bj merely adding -ase to the name i 



upon thus, the enzyme which hydrolyzea glycogen is called | 



Mfosl of the enzymes in the animal body 



es and are classified according to the chemical na1 



Btrate on which they work. Thus, we havi 

 1. The amylases accelerating the hydrolysis of pol 



ptyalin (in saliva , amylopsin (in pancreatic juic< . 



liver , <1 in malt 



'_*. The inveriates accelerating hydrolya 

 ase, lactase and sucrase in sue, mis entericus 



:'.. The proti inan - accelerating hj 

 iin gastric j u i<-.- . trypsin (in pancreatic juic< 

 proteinase 



1 The Upasi » accelerating disruption 

 i in pancreatic juice . inl • acellular Ii] 



.1 rginast accelerat ing hyd 

 nithin. i intracellular . 



