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  • VPYPQ peptide

VPYPQ peptide

Not For Human Use, Lab Use Only.

Cat.#: 319351

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Optional Service: TFA RemovalWhat's this?

Special Price 94.2 USD

Availability: 1-2 weeks
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Product Information

  • Product Name
    VPYPQ peptide
  • Documents

    Batch to batch variation of the purity

  • Sequence Shortening
    H-VPYPQ-OH
  • Sequence
    H-Val-Pro-Tyr-Pro-Gln-OH
  • Length (aa)
    5
  • Peptide Purity (HPLC)
    95.94%
  • Molecular Formula
    C29H42N6O8
  • Molecular Weight
    602.68
  • Source
    Synthetic
  • Form
    Powder
  • Description
    VPYPQ is a casein-derived peptide which was the most potent DPP-IV inhibitory peptide among them with an IC50 value of 41.45 μM. VPYPQ was resistant to hydrolysis by gastrointestinal enzymes and was relatively more stable to hydrolysis by DPP-IV and peptidases in plasma compared with its fragments. VPYPQ was a promising casein-derived DPP-IV inhibitor.
  • Storage Guidelines
    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
  • References
    • Zheng L, Xu Q, Lin L, Zeng XA, Sun B, Zhao M. In Vitro Metabolic Stability of a Casein-Derived Dipeptidyl Peptidase-IV (DPP-IV) Inhibitory Peptide VPYPQ and Its Controlled Release from Casein by Enzymatic Hydrolysis. J Agric Food Chem. 2019 Sep 25;67(38):10604-10613. doi: 10.1021/acs.jafc.9b03164. Epub 2019 Sep 12. PMID: 31466448.
  • About TFA salt

    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.

  • Molar Concentration Calculator

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  • Percent Concentration Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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• Peptide Services: NovoPro's peptide synthesis services include standard chemical peptide synthesis, peptide modification, peptide libraries, and recombinant peptide expression.

• Standard Peptide Synthesis: NovoPro offers quality peptides at the most competitive prices in the industry, starting at $3.20 per amino acid. NovoPro provides PepBox – Automatic Quote Tool for online price calculation.

• Peptide Modifications: NovoPro offers a wide range of peptide modification services including isotope labeling (2H, 15N, and 13C), multiple disulfide bonds, multiple phosphorylations, KLH, BSA, ovalbumin, amidation, acetylation, biotin, FITC, etc.

Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"