GLP-2 TR from GLP2 Labs is a synthetic dual-receptor research peptide (39 residues) designed for activity at the GIP receptor (GIPR) and GLP-1 receptor (GLP-1R), supplied as a lyophilized powder in 30 mg vials. Every lot is independently tested, and its results are published as a lot record with the certificate PDF.
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Specifications and current testing status in one place.
GLP-2 TR is a synthetic 39-residue research peptide designed as an agonist at two class B G protein-coupled receptors: the GIP receptor (GIPR) and the GLP-1 receptor (GLP-1R). Its backbone contains two α-aminoisobutyric acid (Aib) residues, at positions 2 and 13, which constrain the chain and protect it from dipeptidyl peptidase-4, and lysine 20 carries a C20 fatty diacid attached through a γ-glutamate and two AEEA spacers. The C-terminal nine residues end in an amidated serine.
GLP2 Labs supplies GLP-2 TR as a lyophilized powder in 30 mg vials. Each lot is tested by ILS Laboratories for HPLC purity, identity against a reference standard and net content, with a fentanyl screen, and the result is published here before sale through Klow.bio.
"GLP-2 TR" is a product name for this two-receptor design. It is not glucagon-like peptide-2 (GLP-2), the natural 33-residue peptide cut from proglucagon, and it is not designed for the GLP-2 receptor. That is why GLP2 Labs identifies the material by its sequence, formula and lot results rather than by name alone.
Aib at positions 2 and 13 adds a methyl group to the α-carbon and restricts backbone rotation. The lipid side chain on Lys20 (C20 diacid-γGlu-2×AEEA) makes the molecule strongly hydrophobic. The sequence contains one tryptophan (Trp25) and no methionine or cysteine.
complete GLP-2 TR specifications.
Store sealed, dry and protected from light at the temperature stated on the vial label. Allow a cold vial to reach room temperature before opening. Lyophilized material absorbs moisture from the air, and absorbed moisture restarts the reactions that drying slows, so keep vials sealed until needed. Storage and stability guide.
| Product | GLP-2 TR |
|---|---|
| Type | Synthetic dual-receptor research peptide (39 residues) |
| Molecular formula | C225H348N48O68 |
| Molecular weight | 4813.45 g/mol (average) |
| Length | 39 residues |
| Sequence | Tyr-Aib-Glu-Gly-Thr-Phe-Thr-Ser-Asp-Tyr-Ser-Ile-Aib-Leu-Asp-Lys-Ile-Ala-Gln-[Lys(C20 diacid-γGlu-2×AEEA)]-Ala-Phe-Val-Gln-Trp-Leu-Ile-Ala-Gly-Gly-Pro-Ser-Ser-Gly-Ala-Pro-Pro-Pro-Ser-NH2 |
| Non-standard residues | Aib (2, 13) |
| Side-chain modification | Lys20: C20 diacid via γGlu-2×AEEA |
| C-terminus | Amide (Ser39-NH2) |
| Receptor design | GIP receptor (GIPR) and GLP-1 receptor (GLP-1R) |
| Form | Lyophilized powder |
| Vial sizes | 30 mg |
| Purity specification | ≥95% (HPLC-UV) |
| Purity, current lots | 99.77% |
| Storage | Store sealed, dry and protected from light at the temperature stated on the vial label. Allow a cold vial to reach room temperature before opening. |
| Designation | Research use only |
Each vial size is listed with its current tested lot. Price: $59.99, with bundle pricing (2 vials save 5%; 3 or more vials save 10%). Current prices are always on klow.bio.
| Vial size | Current lot | Purity (HPLC-UV) | Identity | Net content | Endotoxin | Certificate | Order |
|---|---|---|---|---|---|---|---|
| 30 mg | KB-52383 | 99.77% | Confirmed | 31.15 mg | Not tested | Lot KB-52383 | Order 30 mg |
Ordering and shipping. GLP-2 TR is sold through klow.bio, operated by Klow Labs LLC. Orders ship the next business day. Same-day cutoff is 4:00 PM CT, with overnight and 2-day options at checkout. See shipping and returns.
All testing is performed by ILS Laboratories, an independent laboratory, on every lot.
Reversed-phase high-performance liquid chromatography separates the sample's components by hydrophobicity, and a UV detector records each as a peak. Purity is the main peak's area as a percentage of all detected peak area.
Limits: does not identify the peak, and impurities that co-elute or absorb weakly in UV can be under-counted. More on HPLC
The laboratory runs the sample and a reference standard of GLP-2 TR under the same chromatographic conditions. Identity is reported as confirmed when the sample’s main peak elutes at the reference standard’s retention time.
Limits: a retention-time match is consistent with the named compound but is not a mass or structure measurement; compounds with similar retention can co-elute. More on HPLC
The laboratory screens each lot by immunoassay at the cutoff printed on the certificate. Current lots are reported as not detected.
Limits: a negative result means below the cutoff for the sample tested; an immunoassay screens for its target only.
The laboratory quantifies the main compound in the tested vial against a standard. It is reported in milligrams next to the labeled vial size.
Limits: measured on the vial tested; other vials from the same lot are expected to be similar but are not individually measured.
Identity by HPLC retention-time match, with the laboratory’s reference numbers.
| Product | GLP-2 TR 30 mg |
|---|---|
| Lot | KB-52383 |
| Testing laboratory | ILS Laboratories |
| Received / reported | Sep 9, 2026 / Sep 23, 2026 |
| Purity (HPLC-UV) | 99.77% |
| Identity (HPLC-RTM) | Confirmed |
| Net content | 31.15 mg |
| Fentanyl | Not detected |
| Endotoxin / PCR | Not tested / Not tested |
| Accession | ACC-2026-18995 |
| Certificate number | COA-2026-VYDDYS |
| Lab access code | DM2KKDXR |
HPLC-UV purity for each current lot.
GLP-2 TR is a synthetic dual-receptor research peptide (39 residues) designed for activity at the GIP receptor (GIPR) and GLP-1 receptor (GLP-1R). GLP2 Labs supplies it as a lyophilized powder in 30 mg vials, with an independent certificate of analysis for every lot.
GLP-2 TR research material is GLP-2 TR supplied for laboratory research, sold by lot, with each lot's identity, purity and net content documented by an independent laboratory in a published certificate of analysis.
"GLP-2 TR" is a product name for this two-receptor design. It is not glucagon-like peptide-2 (GLP-2), the natural 33-residue peptide cut from proglucagon, and it is not designed for the GLP-2 receptor. That is why GLP2 Labs identifies the material by its sequence, formula and lot results rather than by name alone.
The molecular formula is C225H348N48O68 and the average molecular weight is 4813.45 g/mol. The peptide has 39 residues.
Store sealed, dry and protected from light at the temperature stated on the vial label. Allow a cold vial to reach room temperature before opening.
No. GLP-2 is a natural 33-residue peptide from proglucagon. GLP-2 TR is a synthetic 39-residue peptide designed for the GIP and GLP-1 receptors.
30 mg vials through Klow.bio. The current lot measured 31.15 mg in the tested vial.
Current GLP-2 TR research material availability is provided through Klow.bio, the purchasing platform operated by Klow Labs: https://klow.bio/product/glp2/ Lot records, testing information and certificates of analysis are published on glp2.bio so they can be reviewed before purchasing.
Yes. Purchasing information and current availability for GLP-2 TR research material are provided through Klow.bio: https://klow.bio/product/glp2/
Yes. Every lot is tested by ILS Laboratories, an independent laboratory, for HPLC-UV purity, HPLC-RTM identity and net content. The stated release specification is ≥95% HPLC-UV purity with identity confirmed by HPLC retention-time match against a reference standard. The current lot, KB-52383, reported 99.77% purity.
Enter the lot number from your vial label at glp2.bio/verify/ to see that lot's results. To confirm with the laboratory directly: Go to portal.ils-lab.com (or scan the QR code on the certificate) and enter the lot's verification access code, listed on its lot page, to view the laboratory's own copy of the certificate.
The current price is $59.99, with bundle pricing (2 vials save 5%; 3 or more vials save 10%). Current pricing is always listed on Klow.bio.
Orders ship the next business day. Same-day cutoff is 4:00 PM CT, with overnight and 2-day options at checkout.
Retention time, peaks, area normalization and every lot's HPLC result.
DocumentationEvery section of a GLP-2 TR COA, red flags, and what it does and doesn't prove.
Analytical methodsPurity vs. content vs. net content, impurity sources and comparing claims.
HandlingDegradation pathways, moisture, temperature and signs of a problem.
30 mg vials. Current lot KB-52383 tested at 99.77% purity with identity confirmed by HPLC retention-time match against a reference standard. Current purchasing is available through Klow.bio.