Polyclonal Antibody

**Semantic type:** Amino Acid, Peptide, or Protein|Immunologic Factor

**Definition:** A heterogeneous antibody derived from a host organism, typically produced by immunization of a suitable mammal with an antigen which induces B-lymphocytes to produce IgG immunoglobulins specific for the antigen. The resulting collection of antibodies have specificity for different epitopes of the antigen.