The FLAG® Expression System is a proven method to express, purify and detect recombinant fusion proteins. We now offer a magnetic bead for immunoprecipitation, protein purification, and the study of protein-protein interactions.
The ANTI-FLAG® M2 Magnetic Bead is composed of murine derived, anti-FLAG® M2 monoclonal antibody attached to superparamagnetic iron impregated 4% agarose beads, with an average diameter of 50 µM. The M2 antibody is capable of binding to fusion proteins containing a FLAG® peptide sequence at the N-terminus, Met-N-terminus, or C-terminus locations in mammalian, bacterial, and plant extracts.
Figure 1.ANTI-FLAG® M2 Magnetic Beads
The magnetic properties allow for:
This leads to:
Western blot analysis demonstrates that binding capacity of the ANTI-FLAG® magnetic beads when compared to the equivalent agarose conjugate (Product No. A2220).
Courtesy of Drs. Guillaume Adlemant and Jarrod Marto, Blais Proteomics Center, Dana-Farber Cancer Institute.
Figure 2.Binding Capacity of the ANTI-FLAG® M2 Magnetic Beads
Two different FLAG®-tagged baits were purified either from a HeLa-S3 nuclear extract (Nuc. Extr.) or from a HeLa-S3 cytoplasmic fraction (Cyto. Extr.). Both samples were prepared from 10e8 cells. The purifications were performed on the Thermo King Fisher magnetic bead processor. 10% of each FLAG® immunoprecepitation elution was loaded on the gel and silver stained.
Courtesy of Drs. Guilaume Adelmant and Jarrod Marto, Blais Proteomics Center, Dana-Farber Cancer Institute.
Figure 3.Purification of Two Different FLAG®-tagged Baits
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