PLANT AGGLUTININS (LFXTINS) I 69 



TABLK 5-4 

 Determination of Subgroups of A and AB with Lectins^' 



^ Boyd and Shapleigh, 1954c. 



Lectins have been used by Morgan and Watkins (1956) to show 

 that the blood group antigen of group AB individuals is not a 

 mixture of A and B substances, but a unique molecule containing 

 both A and B specificities. The anti-N of Vicia graminca is actually 

 better than the absorbed anti-N prepared from immune rabbit serum 

 and v^ould doubtless be used routinely if more of the tiny seeds 

 of this South American plant were available. This lectin has already 

 proven valuable in clarifying the MN system in chimpanzees (Levine 

 et al., 1955). The anti-N of Bauhinia is not quite as good, but may 

 nevertheless come into routine use because the seeds are availalile in 

 many parts of the world (Boyd, Everhart, and McMaster, 1958). 



TABLE 5-5 

 Inhibition of Anti-H (Ulex) by SaHvas of Secretors and Nonsecretors* 



Boyd and Shapleigh, 1954b. 



