#agglutinin  an antibody that causes agglutination of a specific antigen
  supertype:  antibody  any of a large variety of immunoglobulins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response
  subtype:  isoagglutinin  an antibody produced by one individual that causes agglutination of red blood cells in other individuals of the same species

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