Antibody Purification (Antiserum or Ascites by Protein A/G Chromatography). Buffer Preparation, Preparation of a Protein A Agarose or Protein G Agarose Affinity Column, Pouring the Protein A/G Affinity Column, Preparation of Antiserum or Ascites for Affinity Chromatography, Affinity Chromatography Using Protein A/G Agarose.