Hemagglutinating 7S subunits of 19S cold agglutinins.
D000373:Agglutinins / Q000032:analysis / Q000276:immunology*; D003165:Complement System Proteins / Q000276:immunology; D006384:Hemagglutination; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis / Q000276:immunology*