For decades, liquid chromatography has been a powerful tool for isolating proteins, peptides, and other molecules from complex mixtures. Protein A, Protein G and Protein L bind IgG from a variety of species; resins crosslinked to these proteins are used to purify monoclonal or polyclonal antibodies. Affinity resins for fusion tags added to recombinant proteins allow purification by affinity chromatography. To support your protein research, we offer a broad range of protein chromatography tools for antibody purification and affinity purification, including the FLAG® system of recombinant fusion protein detection and purification.