Neuropeptide Research · New
DSIP — Research Peptide
DSIP, a naturally occurring nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) examined in published preclinical research on EEG and neuroendocrine signaling.
$39.99 · 10mg
Third-party tested · Freedom Diagnostics
View lab-hosted COA · Third-party COA · Lot EP-73184K
- Ships from within the U.S.
- Pay by card, Apple Pay, Venmo, Cash App or crypto
- Stored frozen at −10 °F until ship day
- Batch ID and QR code on the label
For in-vitro laboratory research use only. Not for human consumption.
Specifications
DSIP at a glance.
- Size
- 10mg
- Form
- Lyophilized powder
- Storage
- −20°C (Protected from light and moisture)
- Purity
- 99.27% (HPLC-UV · Freedom Diagnostics COA)
- Molecular weight
- 848.81 g/mol
- Molecular formula
- C₃₅H₄₈N₁₀O₁₅
- Certificate of Analysis
- Third-party tested (Lot EP-73184K · Freedom Diagnostics)
- Category
- Neuropeptide Research
- Sequence
- Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu
Third-party COA · Lot EP-73184K
Documented by a third-party lab.
Issued and hosted by Freedom Diagnostics Testing, the independent lab that ran it, with Excalibur Peptides as the client. It covers lot EP-73184K. Open the lab-hosted report, or look it up with the search code.
Independent verification
Verify on Freedom Diagnostics.
This DSIP Certificate of Analysis is hosted on Freedom Diagnostics Testing's own site. Search the code below on the lab's lookup page, or open the lab-hosted PDF. Values are shown as printed on the certificate.
Search code: Exca2609280349
- Lab
- Freedom Diagnostics Testing
- Lot
- EP-73184K
- Sample
- DSIP 10mg
- Received
- 9/28/2026
- Reported
- 9/29/2026
- Purity (HPLC-UV)
- 99.27%
- Identity (LC-MS)
- Confirmed
- Net content
- 12.02 mg
View lab-hosted COA (PDF on coas.freedomdiagnosticstesting.com)
What's in the box
One vial, part by part.
10mg of DSIP, supplied as a lyophilized powder in a sealed glass vial.
On the label
Clearly labeled.
Printed label
Product name, size and a research-use-only statement.
Batch ID
A batch number is printed on every label.
QR code
Printed on the label, next to the batch ID.
Research-use line
“For research and laboratory use only — not for human consumption” runs along the bottom of the label.
More in Neuropeptide Research.
Research
Research background.
Chemical identity, proposed mechanism and published preclinical literature, for laboratory reference.
Mechanism of action
DSIP is a naturally occurring nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) first characterized in 1977 from rabbit cerebral venous blood; the acronym reflects the name assigned at its isolation. A dedicated receptor or precursor gene has not been definitively identified, and its mechanism remains an open research question. Preclinical work has examined its association with EEG activity, its effects on neuroendocrine signaling including corticotropin and luteinizing hormone release, and its transport across the blood-brain barrier.
Research observations
- EEG activity examined in published rabbit and rodent studies
- Luteinizing hormone and corticotropin release examined in rat models
- Neuroendocrine stress-axis signaling examined in preclinical paradigms
- Blood-brain barrier transport and peptide stability characterized in animal and cell-culture models
- Mitochondrial oxidative phosphorylation parameters examined in preclinical studies
Key research & publications
- Schoenenberger & Monnier (1977) — Characterized a nonapeptide isolated from rabbit cerebral venous blood and examined its association with EEG activity in recipient animals.
- Iyer & McCann (1987) — Examined DSIP effects on luteinizing hormone (LH) release in rat models.
- Kovalzon & Strekalova (2006) — Review concluding that, after three decades of study, DSIP’s precursor, receptor and physiological role remain unresolved.
Frequently asked questions.
What is DSIP?
DSIP is a naturally occurring nonapeptide, Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu (C₃₅H₄₈N₁₀O₁₅, 848.81 g/mol), first characterized in 1977. A dedicated receptor has not been identified; preclinical work has examined its association with EEG activity and with neuroendocrine signaling.
Where can I buy DSIP for research?
Excalibur Peptides sells DSIP on this page as a 10mg vial of lyophilized powder, for in-vitro laboratory research only. Orders ship from Austin, Texas, to addresses within the United States, and the product's third-party Certificate of Analysis is published in our COA database. Buyers must be 21 or older and confirm research-use-only status at checkout.
How is DSIP tested, and where is its COA?
DSIP is third-party tested by Freedom Diagnostics Testing: purity by HPLC and identity by LC-MS. The Certificate of Analysis is published in our COA database, and the report can be looked up on the lab's own site with search code Exca2609280349.
How should DSIP be stored in the lab?
Keep lyophilized DSIP sealed at −20 °C, protected from light and moisture, as listed on this page. Let the vial reach room temperature before opening so moisture does not condense on the powder, and avoid repeated freeze–thaw cycles.
How fast does DSIP ship?
DSIP ships from Austin, Texas. Orders placed before 2 PM EST on a business day ship the same day, and delivery within the United States typically takes 2–4 business days. A tracking number is emailed when the order ships.
What payment methods can I use to buy DSIP?
We accept credit and debit cards, Apple Pay, Venmo, Cash App and cryptocurrency. Prices are in U.S. dollars.
Is DSIP approved by the FDA?
No. The DSIP supplied by Excalibur Peptides is not approved by the FDA for human or veterinary use. It is sold only for in-vitro laboratory research and identification purposes and is not for human consumption.
For research and laboratory use only. Not for human consumption.
All products sold on this website are intended for in-vitro laboratory research and identification purposes only. They are not for human or veterinary use and are not for human consumption.
All information is provided for educational and research purposes. Excalibur Peptides does not condone or promote the use of any product for any purpose other than legitimate scientific research and compound identification.