A Second Example of Blood Group B₃

A second example of an unusual B gene, named B₃ by Moullec, has been presented, with a family study. Absorption and elution tests and studies of the saliva of a mother and her daughter established this group as a genetically determined subgroup of B. In our opinion, the substance found in the saliva of these individuals and of so called "aberrant secretors" of groups A₂ and A₂B may be so specific as to require their specific cell types in order to demonstrate their presence or absence.