MOTS-C 10mg | Lyophilised Powder

Tesamorelin is a fully synthetic 44-residue peptide amide corresponding to the GHRH(1–44) sequence, distinguished by a trans-3-hexenoyl group acylated onto the α-amino group of the N-terminal tyrosine. That lipophilic N-terminal modification is the structural feature defining it as a discrete entity within the GHRH analogue family, and it's the feature most often referenced in analytical method development and stability profiling.

At 5136 g/mol across 44 residues, this is the largest peptide on our catalogue. Supplied as a lyophilised powder in a sealed single-use vial.

Chemical identity

Product specification

Storage and handling

Store sealed at −20°C, protected from light and moisture. Equilibrate to ambient temperature before opening. Larger peptides are generally more sensitive to freeze-thaw cycling than short chains — avoid repeated temperature excursions. Refer to the lot COA for batch-specific data.

Supply and despatch

UK stock. Same-day despatch before 3pm, Royal Mail 24 Tracked.

FAQ

What is the CAS number for Tesamorelin? 218949-48-5.

What does TH9507 refer to? The original development code for tesamorelin. Both designations appear across the literature and supplier catalogues.

What makes tesamorelin structurally distinct from GHRH? A trans-3-hexenoyl group acylated onto the N-terminal tyrosine of the 44-residue GHRH sequence.

What is the molecular weight? 5135.87 g/mol average; 5132.7166 Da monoisotopic.

Package Includes

1 × Tesamorelin 10mg vial

BPC-157 is a synthetic pentadecapeptide — a 15-residue chain corresponding to a partial sequence of a protein identified in human gastric juice. Supplied as a lyophilised (freeze-dried) powder in a sealed single-use vial for laboratory and analytical work.

Unusually for a short peptide, four of its fifteen residues are proline, which is the structural feature most often referenced in stability and analytical method development work.

Chemical identity

Product specification

Storage and handling

Store the sealed vial at −20°C, protected from light and moisture. Allow to reach ambient temperature before opening to prevent condensation on the powder. Lyophilised material is stable for extended periods under these conditions; refer to the lot COA for batch-specific data. Handle in accordance with your own laboratory's COSHH assessment.

Documentation

Every lot ships against a certificate of analysis covering HPLC purity, mass spectrometric identity confirmation, appearance and water content. Current certificates are published on our test certificates page.

Supply and despatch

Held in UK stock. Orders placed before 3pm are despatched the same working day via Royal Mail 24 Tracked. No import delay, no customs handling.

FAQ

What is the CAS number for BPC-157? 137525-51-0. This identifies the free base pentadecapeptide. Salt forms are supplied against the same CAS with mass adjusted on the COA.

What is the molecular weight of BPC-157? 1419.56 g/mol for the free base. Measured mass on your COA may differ slightly depending on salt form and residual water content.

Are certificate of analysis available to review? Yes — Certificates are published on our test certificates page so you can review before ordering.

Is this material held in the UK? Yes. All stock is held and despatched from the UK.

Read this before you order TB-500 from anyone. "TB-500" is used commercially for two different molecules: the short acetylated fragment, and full-length thymosin β-4. They differ in mass by more than five times, and the analytical literature that applies to one does not apply to the other.

What we supply is the fragment: N-acetyl-Leu-Lys-Lys-Thr-Glu-Thr-Gln — seven residues corresponding to positions 17–23 of thymosin β-4, capped with an acetyl group at the N-terminus. It contains no cysteine, so there is no disulfide bond to preserve. 

Chemical identity

Product specification

Storage and handling

Store sealed at −20°C, away from moisture and light. The peptide is highly water-soluble. Equilibrate to room temperature before opening. Refer to the lot COA for batch-specific stability data.

Documentation

Lot-specific COA with every order, covering HPLC purity and MS identity confirmation. Because of the fragment/full-protein ambiguity described above, we'd encourage you to check the mass on the certificate against the 889.01 g/mol figure — that's the fastest way to confirm which entity you've been sent, by us or by anyone.

Supply and despatch

UK stock. Same-day despatch on orders before 3pm, Royal Mail 24 Tracked.

FAQ

Is TB-500 the same as thymosin beta-4? No. TB-500 as a defined chemical entity (CAS 885340-08-9) is a 7-residue acetylated fragment of around 889 g/mol. Full-length thymosin β-4 is a separate 43-residue protein of around 4963 g/mol. Some suppliers use the name for either — always check the mass on the COA.

What is the CAS number for TB-500? 885340-08-9, for the acetylated heptapeptide.

What is the sequence of TB-500? Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln (Ac-LKKTETQ), the actin-binding motif region of thymosin β-4.

How do I verify what I've received? Compare the mass spectrometry figure on your lot COA against 889.01 g/mol. A result near 4963 indicates full-length protein, not the fragment.

CJC-1295 is one of the most commonly mislabelled compounds in this market.

This is CJC1295 with DAC.

Two distinct molecules share the name, and the CAS number most suppliers publish belongs to the wrong one.

• With DAC — 30 residues, ~3647 g/mol. The C-terminal lysine carries a maleimidopropionyl group (the drug affinity complex).
• Without DAC (also sold as Mod GRF 1-29) — 29 residues, ~3368 g/mol. No conjugation.

This product is the 30-residue with DAC-conjugated compound.

Check the mass on your COA: ~3647 confirms DAC, ~3368 means you have the non-DAC analogue.

Chemical identity

Product specification

Storage and handling

Store the sealed vial desiccated at −20°C, protected from light. The maleimide group is the reactive feature of this molecule and is susceptible to hydrolysis — keep the powder dry and avoid repeated freeze-thaw cycles. Equilibrate to ambient temperature before opening.

Supply and despatch

UK stock. Same-day despatch before 3pm, Royal Mail 24 Tracked.

FAQ

What's the difference between CJC-1295 with and without DAC? The DAC version has a maleimidopropionyl group on a 30th C-terminal lysine residue; the non-DAC version is the 29-residue peptide alone. Masses are ~3647 and ~3368 g/mol respectively.

What is the correct CAS number for CJC-1295 with DAC? 446262-90-4. The widely published 863288-34-0 properly denotes the 29-residue non-DAC compound — a frequent source of confusion when comparing suppliers.

How do I confirm which version I've received? Check the mass on the lot COA against ~3647 g/mol.

Is this the same as Mod GRF 1-29? No. Mod GRF 1-29 is the non-DAC 29-residue compound.