FORMATION OF AMBOCEPTORS. 265 



amount and character of complement in the im- 

 munized animal undergoes little or no change. 

 We are, of course, obliged to consider the ambo- 

 ceptors as a product of the cells of the body. In 

 the terminology of Ehrlich, they are discarded cell 

 receptors, and with their two haptophores repre- 

 sent a more complex structure than either the re- 



^L 



Fig. 7. Graphic representation of receptors of the third 

 order, and of some substance uniting with one of them. 

 c, Cell receptor the third order, an amboceptor ; e, one of the 

 haptophores of the amboceptor. with which some food sub- 

 stance or product of bacterial disintegration, f, may unite ; 

 g, the other haptophore of the amboceptor with which com- 

 plement may unite ; K, complement ; Ti, the haptophore, and 

 z, the zymotoxic group of complement. From Ehrlich's 

 "Schlussbetrachtungen," Nothnagel's System of Medicine, 

 vol. viii. 



ceptors of antitoxin or agglutinin; the latter are 

 uniceptors; the former amboceptors, and because 

 of their higher differentiation Ehrlich has called 

 them receptors of the third order (Fig. 7). 



