Thymalin is supplied as the synthetic thymic nonapeptide thymulin, a nine-amino-acid peptide with the sequence Pyr-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn. It has the molecular formula C33H54N12O15, a molecular weight of approximately 858.86 g/mol, and CAS number 63958-90-7 (thymulin). The peptide is characterized in the literature as a zinc-binding thymic factor; the biologically described form is the zinc complex, while the peptide itself is supplied metal-free. Supplied as a white to off-white lyophilized powder, soluble in water, stored refrigerated at 2–8 °C. This product is strictly for research purposes only.
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