Abstract
Summary
When human erythrocytes were treated with tannic acid, they reacted normally with anti-A, and anti-D sera, but the reactions with anti-C, anti-E, anti-M and anti-N were either eliminated or markedly reduced. Purified blood group A substance could be adsorbed onto tanned B cells and B substance onto tanned group A cells; in each case the cells reacted serologically as group AB cells. When the D antigen was present along with the A antigen, the former was unaffected by adsorption of B substance.
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