T7 peptide

T7 peptide

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

Batch to batch variation of the purity

1 Vial

H-HAIYPRH-OH

H-His-Ala-Ile-Tyr-Pro-Arg-His-OH

7

95.41

C₄₁H₆₀N₁₄O₉

893

Synthetic

T7 (HAIYPRH) peptide, a phage display-selected peptide, exhibited high binding affinity to transferrin receptor (TfR) overexpressed on tumor cells. The binding site of T7 to TfR is distinct from that of Tf, thus avoiding competitive inhibition by endogenous Tf. Moreover, endogenous Tf could facilitate the internalization of T7. T7 demonstrated potential ability as an active targeting ligand for the delivery of agents to TfR-overexpressed tumor cells.

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

• Lee JH, Engler JA, Collawn JF, Moore BA, Receptor mediated uptake of peptides that bind the human transferrin receptor, Eur J Biochem. 268 (2001) 2004-2012.
• Oh S, Kim BJ, Singh NP, Lai H, Sasaki T, Synthesis and anti-cancer activity of covalent conjugates of artemisinin and a transferrin-receptor targeting peptide, Cancer Lett. 274 (2009) 33-39.

Trifluoroacetic acid (TFA) is a strong acid, which is commonly used to cleave synthesized peptides from solid-phase resins and is also used to improve HPLC performance in the peptide purification step. By default, custom peptides are delivered as lyophilized TFA salts, and can contain as much as 10-45% TFA.

TFA in custom peptides can cause inexplicable discrepancies in subsequent assay data. For instance, TFA in nM concentrations has been shown to interfere with cellular assays, inhibiting cellular proliferation in some instances, and increasing cell viability in others . It has also been found to be an unintended allosteric modulator of the glycine receptor, GlyR.

TFA Removal Service is recommended for:

• Peptides that will be used in cellular assays
• Peptides that will be used as APIs or in manufactured products
• For hydrophilic peptides containing numerous basic residues