Abstract
To identify the blood sub-groups of A and AB, an anti-A1 serum is used. This is prepared by completely absorbing a human anti-A serum with A2 cells1. The absorbed serum agglutinates A1 and A1B cells, but not A2 or A2B cells. A-specific hæmagglutinins have been demonstrated in saline extracts of the seeds of Dolichos biflorus by Bird2, and it has been suggested3 that because extracts of Dolichos biflorus seemed predominantly A1-specific, they may be used to differentiate the sub-groups A1 and A2) A1B and A2B. The seed extracts have the advantage of being cheaper and more easy to prepare than human sera.
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References
Wiener, A. S., “Blood Groups and Transfusion” (Springfield, 1943).
Bird, G. W. G., Curr. Sci., 20, 298 (1951).
Bird, G. W. G., Ind. J. Med. Res., 40, 289 (1952).
Boyd, W. C., and Reguera, R. M., J. Immunol., 62, 333 (1949).
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BIRD, G. Relationship of the Blood Sub-Groups A1, A2 and A1B, A2B to Hæmagglutinins Present in the Seeds of Dolichos biflorus. Nature 170, 674 (1952). https://doi.org/10.1038/170674a0
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DOI: https://doi.org/10.1038/170674a0
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