Can I see the Certificate of Analysis before buying?

Yes. Ask us for the lot-matched COA before you order and we will send it, documenting identity, purity, and full analytical results.

What does 'Research Use Only' mean?

This product is supplied strictly for laboratory and research use only (RUO). It is not a drug, food, supplement, or cosmetic, is not approved by the FDA, and is not intended to diagnose, treat, cure, or prevent any disease, or for human or veterinary consumption.

How is it shipped and stored?

Orders ship from the United States with tracking, in plain packaging with no identifying labels on the outside. Store the lyophilized material at −20°C, protected from light and moisture.

CatalogPE-22-28

PE-22-28

Name: PE-22-28
Brand: United Peptides
SKU: PE-22-28-10MG
Price: 70 USD
Availability: InStock

Nootropic

PE-22-28: spadin-derived peptide for laboratory research. Third-party tested, 99%+ purity, COA available. Sizes: 10 mg.

$70.00

Per 10 mg · USD

Quantity

SKU PE-22-28-10MG

Third-party tested, ≥99% purity by HPLC and mass spectrometry
Lot-matched Certificate of Analysis available for every lot
Ships from the United States with tracking, in plain packaging

PE-22-28 is a seven-amino-acid fragment derived from spadin, a natural peptide that modulates the TREK-1 potassium channel. It is studied as a TREK-1 channel modulator in neuroscience research.

Common research applications include:

TREK-1 potassium channel research
Mood and neuroplasticity models
Ion-channel pharmacology

Specifications

Class: Spadin-derived peptide
Form: lyophilized powder in a sealed glass vial
Available sizes: 10 mg
Purity: verified at 99% or higher by HPLC, identity confirmed by mass spectrometry
Testing: every lot is third-party tested, with a lot-matched Certificate of Analysis available on request
Manufactured in the USA
Storage: keep sealed, cool, dry and away from light; refrigerate after reconstitution

For laboratory research use only. This product is not for human or veterinary use, is not a drug, food or cosmetic, and is not intended to diagnose, treat, cure or prevent any disease.

Specification

Purity: ≥99% by HPLC · COA available
CAS Number: 1234388-01-0
Molecular Formula: C35H55N11O9
Molecular Weight: 773.89
Amino Acid Count: 7
Sequence: Heptapeptide Gly-Val-Ser-Trp-Gly-Leu-Arg (GVSWGLR) corresponding to the C-terminal 22-28 region of spadin; linear, unmodified termini (full sequence per COA).
Synonyms: Spadin analogue (TREK-1 modulator)
Physical Form: Lyophilized powder
Solubility: Soluble in bacteriostatic water; consult the product COA for specific solvent recommendations.
Storage: Store lyophilized at -20°C; protect from light and moisture. Reconstitute with bacteriostatic water; store reconstituted material refrigerated and use per laboratory procedure.

Complete your setup

Lyophilized peptides need bacteriostatic water and a syringe to reconstitute. Add the essentials in one click.

PE-22-28In your order

Reconstitution Solution — 30 mL$30.00Required

Reconstitution Kit$49.99

Total for 2 items$100.00

Answers

Frequently asked.

Yes. Every lot is independently third-party tested for identity and purity — ≥99% by HPLC and mass spectrometry — with a lot-matched Certificate of Analysis available on request for every lot.