3x DYKDDDDK Tag 

3x DYKDDDDK Tag is a useful tool for investigating the function and localization of proteins whose antibodies (Abs) are not available. Often it is also used in a 3X FLAG format (3x DYKDDDDK Tag) for purifying difficult proteins that accumulate in low abundance ^[1][2].

HEK293 cells transiently transfected with HARS-expressing plasmids were harvested and lysed in CelLytic M buffer containing mammalian protease inhibitor cocktail for 20 min at 4 °C. FLAG-tagged HARS is purified by binding to an anti-DYDDDDK resin per manufacturer protocol and eluted by competition with 3X-DYKDDDDK peptide in buffer containing 50 mM Tris-HCl pH 7.4, and 150 mM NaCl (purification of human HARS)^[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

3002.88

C₁₂₃H₁₇₆N₃₀O₅₈

921765-76-6

Solid

White to off-white

Asp-Tyr-Lys-Asp-Asp-Asp-Asp-Lys-Asp-Tyr-Lys-Asp-Asp-Asp-Asp-Lys-Asp-Tyr-Lys-Asp-Asp-Asp-Asp-Lys

DYKDDDDKDYKDDDDKDYKDDDDK

Room temperature in continental US; may vary elsewhere.

Sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

• [1]. Mishra V. Affinity Tags for Protein Purification. Curr Protein Pept Sci. 2020;21(8):821-830.  [Content Brief]

  [2]. Abbott JA, et al. The Usher Syndrome Type IIIB Histidyl-tRNA Synthetase Mutation Confers Temperature Sensitivity. Biochemistry. 2017;56(28):3619-3631.  [Content Brief]