PurKine™ Anti-DDDDK Resin 4FF has been designed for affinity purification of DDDDK fusion proteins. The Resin consists of 90μm beads of cross-linked 4% agarose, to which mouse monoclonal antibody against DYKDDDDK tag has been coupled. 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™ Anti-DDDDK Resin 4FF is also available as prepacked spin column and kit formats.