(D)-PPA 1 peptide

(D)-PPA 1 peptide

• Handling and Storage of Synthetic Peptides
• Material Safety Data Sheets (MSDS)

Batch to batch variation of the purity

H-NYSKPTDRQYHF-OH (All D-type amino acids)

H-Asn-Tyr-Ser-Lys-Pro-Thr-Asp-Arg-Gln-Tyr-His-Phe-OH (All D-type amino acids)

12

95.63%

C₇₀H₉₈N₂₀O₂₁

1555.64

Synthetic

Powder

(D)-PPA 1 is a programmed death protein 1/ programmed death-ligand 1 (PD-1/PD-L1) interaction inhibitor. (D)-PPA 1 binds to PD-L1 with a Kd of 0.51 μM and can inhibit interaction at a concentration of 1 mg/mL in flow cytometry experiments. (D)-PPA 1 is a hydrolysis-resistant D-peptide and can disrupt the PD-1/PD-L1 interaction in vivo, inhibiting tumour growth and prolonging survival time in mouse models.

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

• Chang et al (2015) Blocking of the PD-1/PD-L1 interaction by a D-peptide antagonist for cancer immunotherapy. Angew Chem.Int.Ed.Engl. 54 11760 PMID: 26259671
• Sun et al (2018) PD-1/PD-L1 pathway and angiogenesis dual recognizable nanoparticles for enhancing chemotherapy of malignant cancer. Drug Deliv. 25(1) 1746 PMID: 30394118

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.