Dip and Read Anti-FLAG (FLG) Biosensors

For Quantitation and Kinetic Characterization of FLAG-tagged Recombinant Proteins

Pre-immobilized with the ANTI-FLAG® M2 antibody, the Anti-FLAG Biosensor directly captures and detects FLAG-tagged proteins for quantitative measurement or affinity determinations, and does not require chemical modification of the protein.

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Key Features

  • Rapid quantitation of FLAG-tagged recombinant proteins
  • Easy capture of FLAG-tagged proteins for kinetic analysis with analyte
  • High specificity and high affinity towards FLAG peptide tag
  • Allows rapid analysis of purified or crude samples

Figure 1: Detection of a TRAIL-FLAG or α1PDX-FLAG standard using Anti-FLAG biosensors on the Octet RED384 system with assay parameters (1000 rpm, 2 min) for a standard dynamic range. A) TRAIL-FLAG dose response. B) α1PDX-FLAG dose response. C) and D) represent the resulting calibration curves from A and B respectively. Sample diluent was used as a matrix for all samples.


Figure 2: Kinetic analysis of the interaction between ligand TRAIL-FLAG (23 kDa) and an analyte Mouse anti-TRAIL (150 kDa). 10X Kinetics Buffer was used as the matrix throughout and the assay temperature was 30°C. Data were processed and the curve fit using a 1:1 binding model. The kinetic results are reported in the table.

ANTI-FLAG and FLAG are registered trademarks of Sigma-Aldrich Co. LLC.

For More Information

Visit our literature page to download technical notes, application notes, posters and customer presentations.