Thymosin Alpha-1 is a synthetic version of a naturally occurring thymic peptide originally isolated from thymosin fraction 5. With the molecular formula C₁₂₉H₂₁₅N₃₃O₅₅ and a molecular weight of 3108.3 g/mol (CAS: 62304-98-7), Thymosin Alpha-1 is a 28-amino acid peptide representing the N-terminal acetylated fragment of prothymosin alpha.
Ac-Ser-Asp-Ala-Ala-Val-Asp-Thr-Ser-Ser-Glu-Ile-Thr-Thr-Lys-Asp-Leu-Lys-Glu-Lys-Lys-Glu-Val-Val-Glu-Glu-Ala-Glu-Asn


