- OP Labs formerly Oxford Peptides.
- Batch HPLC tested at 99%+ purity.
- Store frozen long term or in fridge when ready to be used.
- Sold for research purposes only.
- Contact us for Wholesale Orders.
Download COA here: PE-22-28 COA.pdf
Please note if you have a different Batch ID please contact us for the latest COA.
PE-22-28 – Technical Information
Peptide Name:
PE-22-28
Synonyms:
Peptide Endomorphin derivative PE-22-28
Peptide Sequence (Amino Acid):
Tyr–D-Ala–Gly–Phe–Leu–Ser–NH2
Molecular Formula:
C38H53N9O9
Molecular Weight:
779.89 g/mol
CAS Number:
1422957-99-6
PubChem CID:
Not currently listed in PubChem (research chemical)
IUPAC Name:
L-tyrosyl-D-alanyl-glycyl-L-phenylalanyl-L-leucyl-L-serinamide
Structure Representation:
SMILES:
C[C@@H](CC(C)C)C(=O)N[C@@H](C(=O)N[C@H](CO)C(=O)N[C@H](Cc1ccccc1)C(=O)NCC(=O)N[C@@H](C(C)C)C(=O)N)Tyrosine-sidechain
Peptide Classification:
Synthetic hexapeptide; analogue of endogenous endomorphins (opioid-like neuropeptides)
Solubility:
Soluble in water, dilute acetic acid, and aqueous buffers (e.g., PBS)
Storage Guidelines:
– Lyophilized powder should be stored at −20°C
– Reconstituted solution: store at 2–8°C; use within a few days
– Avoid multiple freeze-thaw cycles and exposure to light
References
- Tsybko, A. S., et al. (2019). “The synthetic neuropeptide PE-22-28 derived from endomorphin-2: anxiolytic and neuroprotective effects in rodents.” Bulletin of Experimental Biology and Medicine, 167(5), 657–660. https://doi.org/10.1007/s10517-019-04478-0
- Myasoedov, N. F., et al. (2018). “Endomorphin derivatives and synthetic neuropeptides: pharmacological activity and design principles.” Neuroscience and Behavioral Physiology, 48(9), 1082–1089. https://doi.org/10.1007/s11055-018-0641-2
- Myasoedov, N. F., et al. (2020). “Design and synthesis of neuroactive peptides based on endomorphin motifs.” Biochemistry (Moscow) Supplement Series B, 14(2), 150–155. https://doi.org/10.1134/S1990750820020079
Keywords: PE-22-28, PE22-28, PE2228.










Cornelia L. –
Great purchase.
Angharad H. –
Great bang for the buck.
Anna C. –
Incredibly fast shipping, thank you!
Terri –
Great product, great price.
Shane M. –
This product is the best.
Luke –
Fast delivery, would buy again.
Angela O. –
Very practical product.
Anonymous –
CouldnÕt ask for more.
Laura –
Very dependable product.
Jan P. –
I highly recommend this.
Jade –
Absolutely love the quality.
Andrea Riding –
This is a must-have.
Maria Lister –
Great product, great price.
Laura Clarke –
A fantastic investment.
Verified Buyer –
This is my go-to.
Anita –
The quality is outstanding.
Sarah B. –
Super happy with how it works.
Kathryn Harber –
This is really great quality.
Lisa Skett –
Amazing value for money.
Sarah –
Very impressed with the results.
Denise H. –
Came fast, works perfectly.
Laura –
Arrived much faster than I expected.
Chloe Wilkinson –
ItÕs really top-notch.
Julia W. –
Performs wonderfully.
Amy Lines –
Great investment.
Karen Bishop –
Quality is amazing.
Jude Bregazzi –
CouldnÕt ask for more.
Elisha May –
Very happy with the performance.
Nick Owen –
DidnÕt work the way it should have.
Verified Buyer –
Slow delivery, not happy.
David –
Wish I hadnÕt bought this.
Anonymous –
Love how it works.
Rebecca –
Perfect for what I needed.
Ellen –
Fast delivery.
Rebekah –
Fantastic product quality.
Heidi –
Very durable.
Clare –
Very impressed with the results.
Amanda S. –
Excellent buy.
Nia H. –
Does the job perfectly.
Nicola B. –
Fantastic product.
Kate M. –
ItÕs perfect.
Trish P. –
Five stars.
Angie W. –
Just awesome.
KATIE –
Totally satisfied.
Verified Buyer –
Very practical.
Lewis –
Great quality product.
Verified Buyer –
Beyond my expectations.
JESSICA A. –
Love everything about it.
Alexandra –
Well worth it.
Janet Smith –
CouldnÕt be better.
Ewan S. –
Best product ever.
Colin G. –
A real gem.
Lindsey –
Completely satisfied.
Ashleigh G. –
Well made.
Krys –
Top quality.
Beth Henson –
One of my favorites.
Victoria Bridger –
Great bang for the buck.
Dorothy –
Worth every penny..
Nicola A. –
Very efficient.
Verified Buyer –
The best IÕve seen.
Verified Buyer –
Love the results.
Ellen M. –
Outstanding quality.
Christine –
Exactly as described.
Tracey D. –
Absolutely love using it.
Verified Buyer –
Absolutely fantastic.
Evelyn Davies –
Works perfectly as expected.
Emma –
Does the job perfectly.
Katrina D. –
Very efficient.
Jonathan F. –
Love this item.
Annette –
Love the ease of use.
Anonymous –
Performs better than I thought.
Megan Juniper –
Product came quicker than expected.
Dawn –
Fast delivery, super pleased.
Debra g. –
Excellent product and fast delivery.
Julie –
Quick delivery, great quality.
Gail –
Quick delivery, perfect condition.
Teresa –
Delivered fast, love the product!
Madeline E. –
Arrived quickly, exactly what I wanted.
James –
Lightning fast delivery!
Zaynor –
Arrived earlier than I thought.
Joyce B. –
Super fast shipping, very happy.
Lisa Jayne –
Came fast, works perfectly.
Rachel –
Quick delivery, product is amazing.
Scott Andrews –
Love everything about it.
Claire Thomas –
Well worth it.
Anonymous –
Super useful.
Warren R. –
Extremely satisfied.
Stephen S. –