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Thymulin is a nonapeptide — a chain of nine amino acids — produced by epithelial cells in the thymus gland. It was first isolated and characterized in 1977 and has the sequence Pyr-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn, with a molecular weight of approximately 858 g/mol (without zinc). Its molecular formula is C₃₃H₅₄N₁₂O₁₅. Thymulin is chemically unique among thymic peptides because it requires a zinc ion (Zn²⁺) to fold into its characteristic three-dimensional fold. Without zinc, the peptide remains in an unfolded state. It is supplied as a white lyophilized powder that is soluble in water and should be stored refrigerated at 2–8 °C.
This product is strictly for research purposes only. Not approved for human or animal use.
ℹ️ Note: 1 kit includes 10 vials
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Thymulin is a nonapeptide — a chain of nine amino acids — with the sequence pyroglutamyl-alanyl-lysyl-seryl-glutaminyl-glycyl-glycyl-seryl-asparagine (Pyr-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn). It was first isolated and characterized in 1977 from thymic epithelial cells in the thymus gland. Without its zinc cofactor, the peptide has a molecular weight of approximately 858 g/mol with the formula C₃₃H₅₄N₁₂O₁₅.
What distinguishes thymulin from other thymic peptides is that it requires a zinc ion (Zn²⁺) to adopt its characteristic three-dimensional fold. The zinc binds to specific residues in the peptide chain, and without it the molecule remains in an unfolded state. It is supplied as a white lyophilized powder, soluble in water, and should be stored refrigerated at 2–8 °C. This product is strictly for research purposes only.
PubChem Reference: View compound profile on NIH PubChem
This product is strictly for research purposes only. Not approved for human or animal use.
Sequence: Pyr-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn
Weight: 858 g/mol (without zinc)
Type: Nonapeptide (9 amino acids)
Origin: Thymic epithelial cells
Form: White lyophilized powder
Solubility: Water soluble
Zinc Requirement: Essential for folding
Storage: Keep refrigerated 36‑46 °F (2‑8 °C)
| Weight | 10mg |
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Ashly –
Very satisfied with the smooth process and reliable delivery
Adam.j –
Peptides Vitals combines quality with professionalism perfectly
Michael Chris –
Peptides Vitals delivered my order quickly with excellent packaging. Very satisfied with the service.
James Daniel –
The product quality from Peptides Vitals was outstanding. Everything arrived fresh, sealed, and exactly as described.
Andrew Sam –
Great product consistency and excellent standards. I highly rate the quality from Peptides Vitals.
James T. Harrison –
Excellent purity for our immunology study
The 99% purity was clearly reflected in our ELISA results. Very consistent batch-to-batch. Shipped quickly to our lab
Maria Delgado –
Great addition to our thymic peptide research
Thymulin from Peptides Vital has shown reproducible activity in our in vitro models. Packaging was secure and arrived intact
Linda Park –
Reliable delivery and consistent results. Great stability under recommended storage. Shipping to Canada was faster than expected.
Robert Chen –
Highly satisfied with purity and service
Third-party testing confirmed >99% purity. The product page is clear about “research use only,” which we appreciate. Will buy again.
Sarah Mitchell –
Perfect for our aging study
We required Thymulin for a mouse model of immune senescence. This product delivered consistent biological activity. Free shipping over $200 helped too
Anthony Whitfield .R –
Excellent customer service and product
Had a question about storage — support replied within hours. Thymulin worked perfectly in our Western blot validation. Five stars.
Nicole B. Foster –
Very clean peptide by HPLC
Ran an analytical HPLC — single major peak. No degradation after 3 freeze-thaw cycles (aliquoted properly). Very happy with this purchase
Gregory Liu –
Great value for high-purity Thymulin
Compared to another supplier, Peptides Vital offered better price and same quality. International shipping was smooth. Will be a repeat customer
Vanessa Reynolds –
Fast US shipping and proper cold pack handling.