3XFLAG peptide The 3x FLAG peptide is a synthetic peptide sequence widely utilized in biochemical research for its ability to facilitate protein detection and purification.During elution with 3xDYKDDDDK-peptide(fp-1) the enrichedFlag® fusion protein is released from DYKDDDDK Fab-Trap™. Western blot was probed with DYKDDDDK tag ... Comprising 23 amino acids, this peptide features a repeated motif of Asp-Tyr-Lys-Xaa-Xaa-Asp, commonly referred to as the DYKDDDDK sequence, which is critical for its functionality. Its design allows for efficient interaction with anti-FLAG antibodies, making it an indispensable tool for scientists working with tagged proteins.
The primary applications of the 3x FLAG peptide revolve around protein tagging, detection, and purification3X FLAG peptide | Protein Marker. Researchers often fuse the FLAG tag, and by extension the 3x FLAG tag, to their proteins of interest. This fusion allows for several key experimental procedures:
* Protein Detection: The presence and location of the tagged protein can be readily detected using antibodies specific to the FLAG epitope. This is particularly useful in techniques like Western blotting and immunofluorescence.
* Protein Purification: The 3x FLAG peptide plays a vital role in affinity purification3X FLAG Peptide. Proteins tagged with the 3x FLAG sequence can be captured using anti-FLAG affinity matrices (such as beads or immobilized antibodies)The 3X FLAG Peptide is asynthetic peptide of 23 amino acid residue. The Asp-Tyr-Lys-Xaa-Xaa-Asp motif is repeated three times in the peptide.. Subsequently, the 3x FLAG peptide itself, at a higher concentration, can be used to competitively elute the bound, purified protein. This competitive elution strategy is highly effective for releasing the tagged protein from the affinity support.Purified 3xFLAG peptide 3x DYKDDDDK ... - Sigma-Aldrich
* Protein Separation: In some protocols, the 3x FLAG peptide can also aid in protein separation techniques, such as SDS-PAGE, by influencing protein migration or facilitating specific interactions.
The defining characteristic of the 3x FLAG peptide is the repetition of the DYKDDDDK epitope three times. This triplication enhances the binding affinity to anti-FLAG antibodies compared to a single FLAG tag, leading to improved sensitivity in detection and greater efficiency in purification.
While the core sequence is consistent, variations can exist in the specific amino acid sequence beyond the core epitope, and in the overall length of the peptide. The molecular weight typically hovers around 2,800 Da, with specific values depending on any additional sequences or modifications. Purity is a crucial factor for reliable experimental results, with commercial offerings often specifying purities greater than 90% or 95%.
It is important to distinguish the 3x FLAG peptide from the single FLAG peptide (DYKDDDDK)Production of Recombinant His-tagged 3× FLAG Peptide in .... While both utilize the same epitope, the triple repetition in the 3x FLAG peptide provides a stronger signal and more robust binding, making it the preferred choice for many demanding applications.
When working with the 3x FLAG peptide, several practical aspects are important to consider:
* Source and Purity: The 3x FLAG peptide is typically available from various life science reagent suppliers. Ensuring high purity is paramount for reproducible results, as impurities can interfere with antibody binding or lead to false positives.
* Storage: These peptides are usually supplied in a lyophilized (freeze-dried) powder form.INGREDIENT SPOTLIGHT: PEPTIDES Proper storage at low temperatures (-5°C to -30°C) is essential to maintain their stability and integrity.
* Concentration for Elution: The effectiveness of competitive elution depends on using an appropriate concentration of the 3x FLAG peptide.3X FLAG Peptide Too low a concentration may result in incomplete elution, while excessively high concentrations might be wasteful or potentially cause non-specific binding issues in subsequent steps.
* Research Use Only: It is critical to note that 3x FLAG peptides are laboratory reagents intended for research purposes only and are not for personal consumption or therapeutic useThis is alaboratory product for research use only. Not for personal consumption. It will not be effective and is dangerous for personal use..
In summary, the 3x FLAG peptide is a sophisticated and highly effective tool that has become indispensable in modern molecular biology. Its repetitive epitope design offers enhanced performance for protein tagging, detection, and purification, empowering researchers to gain deeper insights into protein function and behavior.
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