PeproTech’s Control Antibodies are produced from the serum of goats, mice and rabbits that have not been previously immunized, and are purified by Protein G affinity chromatography, affinity chromatography and gel-filtration chromatography, ammonium sulfate precipitation, or Protein A chromatography. These Immunoglobulin products can be used as control reagents for immunoassays using the respective polyclonal and monoclonal antibodies.