Polyclonal antibodies generated by an immunized animal consist of a heterogeneous mix of immunoglobulins derived from many B-cells that individually target distinct epitopes on an antigen. Often representing up to 5% of the total immunoglobulin, these antibodies are generally purified from the immune sera using antigen-affinity chromatography. Polyclonal antibodies are particularly useful for detecting proteins that are expressed at lower levels, and their performance is impacted to a lesser degree by alterations in the antigen (e.g., denaturation). GeneTex offers an extensive catalog of affinity-purified polyclonal antibodies directed against almost all key targets/proteins in the spectrum of biomedical research.