PROPERTIES OF COMPLEMENTOIDS 

 A 



53 



II. 5 D of IB to each tube. M.H.D. of C = 0-03 c.c. 



A. 



It appears from these examples that the points at which 

 free C appears in the two cases ( (a), where pure C is used, 

 and (b) where a mixture of C and Cd in equal parts is used) 

 approximately correspond only a little more of the mixture 

 of C and Cd has to be added before saturation of the R -f IB 

 molecules occurs. It is also seen that, after the saturation 

 point has been reached, fully twice as much of the mixture 

 as of pure C has to be added before a free dose of C is 

 obtained. Of course, if the C molecules had a much greater 

 affinity for sensitized receptors than the Cd molecules, 

 the actual amount of C added would be approximately 

 the same in the two instances. This, however, is very 



