CKS-17 peptide

CKS-17 peptide

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

Batch to batch variation of the purity

LQNRRGLDLLFLKEGGL

H-Leu-Gln-Asn-Arg-Arg-Gly-Leu-Asp-Leu-Leu-Phe-Leu-Lys-Glu-Gly-Gly-Leu-OH

17

97.8%

C₈₇H₁₄₈N₂₆O₂₄

1942.29

Synthetic

Powder

This peptide corresponds to a highly conserved region of the immunosuppressive retroviral envelope protein p15E. CKS-17 has been shown to inhibit lymphocyte proliferation, B cell activation, natural killer cell cytotoxicity, and monocyte-mediated tumor cytotoxicity. S.Haraguchi et al. demonstrated that CKS-17 induces rises in intracellular cAMP levels that may affect several physiological cellular functions.

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

• G.J.Cianciolo et al., Science, 230, 453 (1985)
• M.Ogasawara et al., J. Immunol., 141, 614 (1988)
• R.A.Gottlieb et al., J. Immunol., 142, 4321 (1989)
• S.Haraguchi et al., Proc. Natl. Acad. Sci. USA, 92, 5568 (1995)
• S.Haraguchi et al., J. Leukoc. Biol., 61, 654 (1997)

Trifluoroacetic acid (TFA) has a significant impact on peptides due to its role in the peptide synthesis process.

TFA is essential for the protonation of peptides that lack basic amino acids such as Arginine (Arg), Histidine (His), and Lysine (Lys), or ones that have blocked N-termini. As a result, peptides often contain TFA salts in the final product.

TFA residues, when present in custom peptides, can cause unpredictable fluctuations in experimental data. At a nanomolar (nM) level, TFA can influence cell experiments, hindering cell growth at low concentrations (as low as 10 nM) and promoting it at higher doses (0.5–7.0 mM). It can also serve as an allosteric regulator on the GlyR of glycine receptors, thereby increasing receptor activity at lower glycine concentrations.

In an in vivo setting, TFA can trifluoroacetylate amino groups in proteins and phospholipids, inducing potentially unwanted antibody responses. Moreover, TFA can impact structure studies as it affects spectrum absorption.