Protein A agarose (similar to Sepharose) can trap a variety of immunoglobulins to a solid phase for immunoprecipitation of affinity chromatography. This protein A is a recombinant version based on the Staphylococcal version. Keep frozen for long-term storage. Avoid repeated freeze/thaw cycles. Larger quantities are available at substantial savings. For additional details, please visit www.proteinmods.com. Product is shipped FedEx overnight on ice packs within continental US. The first item is $30, additional items are shipped at no additional shipping costs.