3x DYKDDDDK Tag TFA（Cat No.:I044184）is a synthetic peptide consisting of three tandem repeats of the DYKDDDDK epitope (also known as the FLAG® tag), provided as a trifluoroacetate (TFA) salt. This tag is widely used in molecular biology and protein engineering for the detection, purification, and characterization of recombinant proteins. The 3x repetition enhances binding affinity to anti-FLAG antibodies, improving sensitivity in immunodetection methods such as Western blotting, ELISA, and immunoprecipitation. It is a valuable tool for researchers requiring robust and specific tagging for protein expression and tracking applications.