Li Cold Agglutinin: A Further Antibody Recognizing Sialic Acid‐Dependent Antigens Fully Expressed on Newborn Erythrocytes

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Abstract
The cold agglutinin anti-Li recognizes a sialic acid-dependent antigen fully expressed only on newborn red cells. Although it resembles anti-i in all aspects except for its nonreactivity with neuraminidase-treated red cells, it is entirely different from anti-i, since sialic acid is not involved in i antigenic determinants.