PurKine™ Protein A/G Purification system is effective for affinity purification of IgG from serum, ascites fluid, cell culture supernantant and other antibody samples. Recombinant Protein A/G is chemically modified with a proprietary method to minimize nonspecific binding of proteins. Also, Protein A/G binding to immunoglobulins is not as pH-dependant as Protein A. Protein A/G binds to all human IgG subclasses and binds well to all mouse IgG subclasses but does not bind mouse IgA, IgM or serum albumin. The portfolio allow optimization of process for maximum protein yield, stability and solubility. Tests also confirm that no decrease in performance occurs after at least five repeated uses. The PurKine™ Protein A/G Purification Resin is also available as prepacked spin column and kit formats.