title: Activity of IgG and IgM ABO antibodies against some weak A (A3, Ax, Aend) and weak B (B3, Bx) red cells.
abstract: The IgG and IgM anti-A and anti-B activities from several immune and non-immune O, A and B sera were tested against a panel of weak (A (A3, AX, AND Aend) and weak B (B3 and Bx) red cells. In all cases it is the IgM which agglutinated optimally Ax (or Bx) cells, while IgG and IgM anti-A (or anti-B) reacted similarly with A3 and Aend (or B3) cells. The agglutinating activity of all these ABO antibodies was found straightly related to their association constant for the A (or the B) receptor.
mesh_terms: D000017:ABO Blood-Group System; D000906:Antibodies; D005260:Female; D006386:Hemagglutination Tests; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology*; D007075:Immunoglobulin M / Q000276:immunology*; D011247:Pregnancy; D011946:Receptors, Antigen / Q000276:immunology*
chemical_list: D000017:ABO Blood-Group System; D000906:Antibodies; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D011946:Receptors, Antigen