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Figure 13. Isotope dilution curves with anti-B 

 Key: 



The B homozygote in this instance has about 10""*. Again, it is the 

 same sort of discrepancy; that is, he has from 10 to 20 times fewer 

 non-B cells than the AiB's, when he ought to have about 1000 times 

 fewer. 



Stern: May I ask a question? Both you and Dr. Cotterman said 

 that this Ai is associated with another B allele. Is it not sufficient to 



