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  • Title: Analysis of the specificity of five murine anti-blood group A monoclonal antibodies, including one that identifies type 3 and type 4 A determinants.
    Author: Furukawa K, Clausen H, Hakomori S, Sakamoto J, Look K, Lundblad A, Mattes MJ, Lloyd KO.
    Journal: Biochemistry; 1985 Dec 17; 24(26):7820-6. PubMed ID: 2418872.
    Abstract:
    The specificity of five mouse monoclonal anti-A blood group antibodies (Ab), four of which were produced by immunization with cultured human cancer cells and one with a synthetic antigen, has been determined by examining their reactivity with purified A glycolipids, erythrocyte glycolipids, oligosaccharides, ovarian cyst glycoproteins, and salivary glycoproteins. Two of the antibodies (HT29-36 and CB) reacted with all A variant structures tested and have a broad anti-A reactivity. Ab CLH6 did not agglutinate A erythrocytes and reacted preferentially with the type 1A structure. Ab S12 agglutinated all A1 erythrocytes and reacted best with simple, monofucosyl type 2 A structures, such as Aa-2, Ab-2, and A tetrasaccharide. Ab M2 has a novel, but complex, spectrum of reactivity. It reacts with type 3 and type 4 A chains and not with type 1 and type 2 A chains. It appears to recognize both an external A structure (formula; see text) (I) (found) in type 3 and type 4 chains) and also an internal structure (II) found in type 3 chains. Ab M2 agglutinates all A and AB erythrocytes but does not react with salivary glycoproteins.
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