For informational and educational purposes only. BPC-157 is for in-vitro research use only. Not for human or animal use. Not medical advice.
Thymulin is a nonapeptide — a chain of nine amino acids — produced by epithelial cells in the thymus gland. First isolated and characterized in 1977, it has the sequence Pyr-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn, with a molecular weight of approximately 858 g/mol and molecular formula C₃₃H₅₄N₁₂O₁₅.
What makes Thymulin chemically unique among thymic peptides is its absolute dependence on zinc. The peptide requires a zinc ion (Zn²⁺) to fold into its characteristic three-dimensional conformation. Without zinc, the molecule remains in an unfolded, biologically inactive state — making it a particularly interesting subject for researchers studying the intersection of trace mineral biology and immune regulation.
Thymulin is produced exclusively by thymic epithelial cells and is found in circulation in both zinc-bound (active) and zinc-free (inactive) forms. Published research has investigated Thymulin’s apparent role in T-cell differentiation and maturation — the process by which immature thymocytes develop into functional T lymphocytes within the thymus. This makes it a subject of ongoing interest in immunology research focused on thymic function and adaptive immunity.
Researchers have also examined Thymulin in the context of age-related immune decline. Thymulin levels in circulation decrease with age, paralleling the well-documented involution of the thymus gland, making it a point of investigation in longevity and immunosenescence research.
Research NoteThe published literature on Thymulin spans immunology, endocrinology, and neuroimmunology. Findings from preclinical models should be evaluated critically and cannot be extrapolated directly to human outcomes. Kilo. Research supplies Thymulin at 99%+ purity with full independent COA documentation for every batch.
For researchers working with Thymulin, the zinc-dependent activity of the peptide is an important experimental consideration. Studies investigating Thymulin activity must account for zinc availability in their experimental systems. The ratio of zinc-bound to zinc-free Thymulin in biological samples has been used as a marker of thymic secretory activity in published research.
Thymulin is supplied as a white lyophilized powder, soluble in water. Store at 2–8°C. Kilo. Research recommends refrigerated storage at all times and cold-chain shipping is standard on all orders.