EPQpYEEIPIYL 

EPQpYEEIPIYL, a phosphopeptide, is a Src homology 2 (SH2) domain ligand. EPQpYEEIPIYL activates Src family members (e.g. Lck, Hck, Fyn) by binding to SH2 domains^[1][2].

The hmT-derived phosphopeptide, pY324, which has the sequence EPQpYEEIPIYL, shows the highest affinity binding to GST fusion proteins of the Lck SH2 domain (5-fold higher than Lck’s affinity-for the Lck tail phosphopeptide) and the Src SH2 domain (44-fold higher than Src’s affinity for the Src tail phosphopeptide)^[1].

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

1473.52

C₆₆H₉₇N₁₂O₂₄P

147612-86-0

Solid

White to off-white

EPQpYEEIPIYL

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.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

• [1]. G Payne, et al. The phosphopeptide-binding specificity of Src family SH2 domains. Chem Biol. 1994 Oct;1(2):99-105.  [Content Brief]

  [2]. T D Mulhern, et al. The SH2 domain from the tyrosine kinase Fyn in complex with a phosphotyrosyl peptide reveals insights into domain stability and binding specificity. Structure. 1997 Oct 15;5(10):1313-23.  [Content Brief]