94 



THE ACTION OF ENZYMES 



It is found that trypsin cannot dissociate the whole 

 of the protein into the amino-acids and other simple 

 substances just mentioned ; a certain amount of a 

 resistant residue remains after the enzyme has acted 

 for many months. 



The action of trypsin is more rapid and complete 

 than pepsin ; few or no primary proteoses are obtained, 

 secondary compounds being apparently produced directly. 



The action may be represented thus : 



Trypsin (in alkaline solution). 

 Protein. 



alkali -albumin. 



Secondary proteoses deutero-albumose. 



peptone 

 (antipeptone). 



peptone. 



(a) 



amino-acids 

 (leucine, tyrosine, 



aspartic, and 

 glutamic acids). 



ammonia. hexone bases 

 (lysine, arginine, 

 histidine). 



