90 



ENZYMES AND DRUG ACTION 



hand, not all lachrymators are capable of combining with 

 SH groups: for example, soap does not. 



Substances such as eserine act on choline esterase, and 

 prevent the hydrolysis of acetyl choline, probably by 

 competitive inhibition. As a result of this process marked 



TABLE XVIII 



THE ACTION OF VARIOUS SUBSTANCES, AS POISONS TO HEXO- 

 KINASE, AND AS VESICANTS IN MAN 



The inhibitory action was studied in the presence of M/i 50 glucose. 



physiological effects ensue which include constriction of 

 the pupil of the eye. Most of these substances act in a 

 reversible manner, but studies by Saunders, Adrian 



