peptide flag ideal for SDS-PAGE - 3XFLAG peptide 3x FLAG Peptide Unveiling the Power of the FLAG Peptide: A Crucial Tool in Protein Research

FLAG peptidemw The FLAG peptide, also widely recognized by its sequence DYKDDDDK, stands as a cornerstone in modern molecular biology and biochemistry. This small, eight-amino-acid peptide protein tag offers a versatile and efficient method for the expression, purification, and detection of recombinant fusion proteins3x FLAG peptide (25 mg; 5 x 5 mg). Its significance lies in its ability to act as a highly specific epitope, enabling researchers to precisely isolate and analyze proteins of interest.

At its core, the FLAG tag is an artificial, synthetic sequence not derived from any natural protein. This design grants it unique properties crucial for experimental applications. The FLAG tag sequence is characterized by its hydrophilic nature and a high charge density, which contributes to its solubility and ease of handling. The specific amino acid composition—Aspartic acid (D), Tyrosine (Y), Lysine (K), and repeated Aspartic acid residues—is key to its functionality. This peptide contains a specific cleavage site for enterokinase, a protease, allowing for the removal of the tag after purification if necessary, while preserving the native folding of the target protein under non-denaturing conditions.

The utility of the FLAG peptide is multifaceted. Primarily, it serves as an epitope tag in recombinant protein expression. By genetically fusing the FLAG tag to a protein of interest, researchers can then employ antibodies specifically designed to recognize this tag. This antibody-based detection is highly sensitive and specific, facilitating the identification and quantification of the tagged protein in various biological samples. This is particularly useful in immunoprecipitation experiments, where the FLAG tag allows for targeted pull-downs with a low background, leading to cleaner protein preparations商品详情.

Beyond detection, the FLAG peptide is indispensable for protein purification.FLAG peptide - 索莱宝|主营生物科研试剂&抗体|蛋白|多肽 Affinity chromatography, utilizing resins coated with antibodies against the FLAG tag (such as Anti-FLAG M1 and M2 agarose resins, or Anti-FLAG M2 magnetic resin), enables the selective capture of tagged proteins from complex mixtures.FLAG ® Peptide This method is highly effective for isolating proteins in their native or denatured states, depending on the experimental protocol.3X Flag Peptide (3X Flag多肽)是一种常用于通过竞争性结合Anti-Flag抗体，从而在免疫沉淀时洗脱与Anti-Flag抗体结合的Flag融合表达蛋白的多肽。 Furthermore, the FLAG peptide itself can be used as a competitor in elution buffers to gently release FLAG fusion proteins from the affinity matrix, a process often performed under non-denatured conditions. This is crucial for studies requiring the protein to retain its biological activity.

The FLAG tag is not limited to a single copy.FLAG peptideis an eight amino acid peptide consisting of L-aspartic acid, L-tyrosine, L-lysine, four L-aspartic acid residues, and L-lysine joined in sequence ... Variations like the 3X FLAG peptide exist, which incorporate three copies of the FLAG tag sequence. This repetitive structure can enhance binding affinity to the anti-FLAG antibodies, potentially leading to more efficient capture and purification, especially for proteins expressed at lower levels. The 3X FLAG peptide offers an even more robust system for highly sensitive detection and purification protocols.

The FLAG tag is widely recognized by a variety of antibodies, including M1, M2, and M5, providing flexibility in experimental design. Its application extends to various expression systems, including bacterial and mammalian expression vectors, making it a universally applicable tool. The FLAG peptide molecular weight is relatively small, minimizing potential interference with the protein's function or folding.

In summary, the FLAG peptide and its derivatives are invaluable reagents in the life sciences.FLAG peptide是一种八个氨基酸组成的多肽(Asp-Ty-rLys-Asp-Asp-Asp-Asp-Lys)，具有. 肠激酶切割位点。FLAG peptide 用于抗体介导的重组蛋白的识别和纯化。 融合蛋白 ... Their ability to facilitate the detection and purification of recombinant proteins, coupled with their specific cleavage site and compatibility with various antibody systems, makes them indispensable for researchers aiming to understand protein function, structure, and interactions. Whether for gentle elution, specific pull-downs, or routine detection via SDS-PAGE, the FLAG peptide remains a powerful and versatile tool in the protein research arsenal.