L17E peptide

L17E peptide

• COA/MS/HPLC Report
• Handling and Storage of Synthetic Peptides
• Material Safety Data Sheets (MSDS)

Batch to batch variation of the purity

H-IWLTALKFLGKHAAKHEAKQQLSKL-NH2

H-Ile-Trp-Leu-Thr-Ala-Leu-Lys-Phe-Leu-Gly-Lys-His-Ala-Ala-Lys-His-Glu-Ala-Lys-Gln-Gln-Leu-Ser-Lys-Leu-NH2

25

96.23%

C₁₃₄H₂₂₀N₃₈O₃₁

2859.42

Synthetic

Powder

L17E is an endosomolytic peptide derived from the cationic and membrane-lytic spider venom peptide M-lycotoxin and contains a substitution of leucine by glutamic acid at position 17. L17E is able to promote the endocytic uptake and cytosolic delivery of exosome-encapsulated proteins. A major obstacles to intracellular targeting by antibodies is the limited release of the antibodies into the cytosol, once inside endosomes. L17E can achieve an enhanced cellular uptake via the induction of micropinocytosis. Once inside the endosome, positively charged L17E is able to preferentially disrupt negatively charged endosomal membranes to enable a marked cytosolic liberation of antibodies (immunoglobulins G (IgGs)) from endosomes. L17E had little pH dependence and no enhanced helical structure is needed for L17E-mediated membrane lysis.

Normally, this peptide will be delivered in lyophilized form and should be stored in a freezer at or below -20 °C. For more details, please refer to the manual: Handling and Storage of Synthetic Peptides

• Akishiba et al., (2017). Cytosolic antibody delivery by lipid-sensitive endosomolytic peptide. Nature Chemistry. 9. 751.

Trifluoroacetic acid (TFA) is a common counterion from the purification process using High-Performance Liquid Chromatography (HPLC). The presence of TFA can affect the peptide's net weight, appearance, and solubility.

Impact on Net Weight: The TFA salt contributes to the total mass of the product. In most cases, the peptide content constitutes >80% of the total weight, with TFA accounting for the remainder.

Solubility: TFA salts generally enhance the solubility of peptides in aqueous solutions.

In Biological Assays: For most standard in vitro assays, the residual TFA levels do not cause interference. However, for highly sensitive cellular or biochemical studies, please be aware of its presence.