RK-10, a specific PD-L1 binding peptide

RK-10, a specific PD-L1 binding peptide

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

Batch to batch variation of the purity

GSGSGSTYLCGAISLAPKAQIKESL

H-Gly-Ser-Gly-Ser-Gly-Ser-Thr-Tyr-Leu-Cys-Gly-Ala-Ile-Ser-Leu-Ala-Pro-Lys-Ala-Gln-Ile-Lys-Glu-Ser-Leu-OH

25

95.13%

C₁₀₅H₁₇₆N₂₈O₃₆S₁

2438.74

Synthetic

Powder

RK-10, a specific PD-L1 binding peptide, could be used for detecting PD-L1 expressing tumors with immunohistochemistry or flow cytometry. Flow cytometry was performed on cell lines and tissues using a fluorescent peptide (RK-10-Cy5). RK-10 shows staining in the tumor regions of FFPE tissues where the SP263 kit does not. RK-10-Cy5 peptide also demonstrates PD-L1 detection in NSCLC, breast, squamous cell carcinoma, and melanoma.

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

• Caldwell, C., Johnson, C. E., Balaji, V. N., Balaji, G. A., Hammer, R. D., & Kannan, R. (2017). Identification and Validation of a PD-L1 Binding Peptide for Determination of PDL1 Expression in Tumors. Scientific Reports, 7(1).
• Chavda VP, Solanki HK, Davidson M, Apostolopoulos V, Bojarska J. Peptide-Drug Conjugates: A New Hope for Cancer Management. Molecules. 2022 Oct 25;27(21):7232. doi: 10.3390/molecules27217232. PMID: 36364057; PMCID: PMC9658517.

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.