STUDIES ON H^MOLYSINS. 



99 



attachment (receptor) in the blood-cells of the individual goat itself 

 has been avoided, and the phenomenon which we have previously 

 designated as a "horror autotoxicus " l is again presented. 



TABLE IV. 



BINDING OF THE IMMUNE BODY OP A RABBIT IMMUNIZED WITH GOAT BLOOD, 

 ON Ox BLOOD AND GOAT BLOOD-CELLS. 



From this experiment we can at once conclude that this receptor 

 system /? actually consists of different components, of which only 

 those separate amboceptors (immune bodies) are found in the serum 

 of goats treated with ox blood whose receptors are absent in the 

 blood-cells of the goat itself. 



The most important result of these investigations investigations 

 complete in themselves is this: By treating animals with ox blood, two 

 fractions of immune bodies are formed, of which one acts only on ox blood 

 and the other also on goat blood; whereas by treatment with goat blood 

 the contrary though entirely analogous result ensues. These two frac- 



1 We were also able to observe that the immune body of the rabbits which 

 had been immunized with ox blood and goat blood acted also on sheep blood. 

 Closer investigation would probably show that this behavior is analogous to 

 its action on goat blood. This corresponds entirely to our earlier observations 

 on the extensive similarity of the receptor apparatus of goat and sheep blood 

 us it was manifested particularly by the experiments on isolysins. 



