THEORIES OF IMMUNITY. 



V. 



SUMMARY OF METHOD OF ILLUSTRATING 

 REACTION. 



Let H represent the haptophorous atom-group 



in the molecule. 

 T represent the toxophorous atom-group 



in the molecule. 

 X represent the nutrient atom-group in 



the molecule. 

 L represent the lysin atom-group in the 



molecule. 

 X represent the remainder of the molecule. 



It is not necessary to separate the X atom- 

 group; it is done, however, to make clearer the 

 fact that there is some vital action going on. 



Then to represent the interaction of toxine 

 and antitoxine the following may be used: 



Toxine molecule contains . . . H+T-j-X 



Antitoxine molecule contains . . H+X 



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