blood group-specific substances A and B
Definition: solution of complexes of polysaccharides and amino acids that reduces the titer of anti-A and anti-B isoagglutinins in serum from those with group O; used to render group O blood reasonably safe for transfusion into those with group A, B, or AB, but does not affect any incompatibility that results from various other factors, such as Rh.
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