LYSINS, AGGLUTININS, PRECIPITINS, ETC. 



247 



The Specificity of Hemolysins. — In the sections preceding we have 

 seen that the blood cells of one animal, injected into an animal of 

 another species, give rise to a hemolytic substance in the blood 

 serum of the second animal, which is strictly specific for the variety of 

 cells injected. Such hemolysins, when produced in one animal 



1, wf- CoTTiplemeTii' 



3. 



--Ani-i^en, 



. Jiaemoly+ic 

 Amljoceptor 



-Red blood cell 



If (2) present, no haemolysis. 

 If (£) nol present. + Kaemolyais. 



Fig. 64. — Schematic Representation of Complement Fixation in the 

 Bordet-Gengou Reaction. 



against blood cells of another species, are spoken of as heterolysins. 

 In studying the nature of hemolysis, Ehrlich and Morgenroth " now 

 discovered that hemolysins could also be produced if an animal was 

 injected with red blood cells of a member of its own species. Such 

 hemolytic substances they called isolysins. In their experiments they 

 injected goats with the washed red blood corpuscles of other goats 

 and found that the serum of the recipient developed the power of 



? Ehrlich uod Morgenroth, Berliner klin. Woch., xxi, 1900, 



