DYKDDDDK or FLAG® tag is an octapeptide tag that can be added to a protein using recombinant DNA technology. It can be fused to the N‐terminus or C‐terminus of a target protein to facilitate detection and purification. GenScript Anti‐DYKDDDDK G1 Affinity Resin (Cat. No. L00432) is designed for the purification of DYKDDDDK‐tagged protein from commonly used protein expression systems including bacteria, yeast and mammalian cells. The DYKDDDDK‐tagged protein in the cell lysate can specifically bind to the anti‐DYKDDDDK monoclonal antibodies coupled to the resin. Nonspecific bindings are eliminated by stringent washing steps, and the target protein is finally eluted with high recovery rate.