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Agglutination of Rh(O)(D) erythrocytes by specific antiserum was inhibited by crude and crystalline N-acetylneuraminic acid, less inhibited by its glycoyl derivative, and weakly inhibited by its degradation product, N-acetyl-mannosamine, and by D-mannose. A brain ganglioside containing neuraminic acid and a Pseudomonas polysaccharide were even more inhibitory. Inhibition was specific for anti-D sera.
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Dodd et al. (1960) studied this question.
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