FLAG® tags enable superior detection and robust purification of recombinant fusion proteins, with proven utility in numerous downstream applications from binding and activity assays to structural analysis. The FLAG® epitope tag is a short, hydrophilic, eight-amino acid peptide (DYKDDDDK tag) that is readily cleavable by enterokinase (EK). Due to its small size and hydrophilic nature, the FLAG® tag commonly resides on the surface of the fusion protein, minimizing effects on function, secretion, or transport of the fusion protein. Regardless of your final application, we have the tools needed to express, purify, and detect FLAG® fusion proteins.
Our FLAG® tag protein expression portfolio includes vectors for efficient expression of recombinant fusion proteins in bacterial and mammalian systems. SnapFast™ vector technology allows you to easily move the gene-of-interest from one vector to another for more efficient and cost-effective cloning.
We offer a variety of agarose affinity purification gels, magnetic beads, purification kits, and coated plates for isolation and purification of FLAG® tagged proteins.
FLAG® and 3xFLAG™ tags include binding sites for highly specific anti-FLAG® monoclonal antibodies as well as polyclonal antibodies and conjugates for ELISA, blotting applications, immunofluorescence, immunocytochemistry, immunohistochemistry (IHC), blotting, and flow cytometry.
Today, researchers are challenged to create high quality samples for meaningful protein analysis, often using cumbersome traditional sample preparation methods. With over 50 years of experience in developing protein sample preparation technologies, Merck is constantly innovating new tools to offer you rapid and efficient solutions that can be smoothly integrated into your workflow.
The FLAG Expression System is an established way to express, purify, and detect recombinant fusion proteins. FLAG and 3×FLAG® have proven utility in numerous applications such as Western blotting, immunocytochemistry, immunoprecipitation, flow cytometry, protein purification, and in the study of protein-protein interactions, cell ultrastructure, and protein localization. These small hydrophilic tags facilitate superior detection and purification of recombinant fusion proteins when using our highly specific and sensitive ANTI-FLAG® antibodies.
The strength and specificity of interactions between biomolecules have been exploited for years in biochemical research. Affinity-based protein purification techniques have been used extensively to isolate and purify specific proteins or classes of proteins from complex biochemical mixtures, such as cell lysates..
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