p524 peptide

p524 peptide

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

Batch to batch variation of the purity

H-SRLSKVAPVIKARMMEYGTT-OH

H-Ser-Arg-Leu-Ser-Lys-Val-Ala-Pro-Val-Ile-Lys-Ala-Arg-Met-Met-Glu-Tyr-Gly-Thr-Thr-OH

20

95.33%

C₉₇H₁₆₈N₂₈O₂₈S₂

2238.66

Synthetic

Powder

This is amino acids 524 to 543 fragment of glutamic acid decarboxylase 65 (GAD65). It is one of the first fragments of this islet antigen to induce proliferative T cell responses in the non-obese diabetic (NOD) mouse model of spontaneous autoimmune diabetes. This peptide is a specific, possibly low affinity, stimulus for the spontaneously arising diabetogenic T cell clone BDC2.5. Immunization with p524-543 increases the susceptibility of the NOD mice to type 1 diabetes induced by the adoptive transfer of BDC2.5 T 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

• Quinn, A. et al. J. Immunol. 166, 2982 (2001); Dai, Y. et al. J. Immunol. 175, 3621 (2005).

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.