Confirmation of the primary structure of thymosin alpha1 by microsequence analysis of limited acid and enzymatic hydrolysis fragments.
Michalewsky. J J; Gabriel. T F TF; Winter. D P DP; Makofske. R R; Danho. W W; Shively. J J; Biemann. K K; Meienhofer. J J
Key Findings
- The 28‑amino‑acid sequence of thymosin‑alpha‑1 reported by Goldstein et al. was independently confirmed.
- Limited acid digestion produced two fragments (26‑ and 22‑residue) that helped map the peptide from the C‑terminus.
- Multiple methods—Edman sequencing, carboxypeptidase Y, thermolysin digestion, and fast atom bombardment mass spectrometry—were combined to verify the structure.
Practical Outcomes
- For DIY biohackers, this study simply reassures that the published sequence of thymosin‑alpha‑1 is correct, which is useful when ordering or synthesizing the peptide. It does not provide new dosing guidance, safety data, or performance‑enhancing protocols.
Summary
Scientists double‑checked the exact order of the 28 amino acids that make up thymosin‑alpha‑1 using several lab techniques, confirming the sequence that was first reported years ago.
Abstract
The primary structure of the 28-peptide thymosin alpha 1 as determined by Goldstein et al. (1) has been confirmed by independent procedures. Limited dilute acid digestion generated a 26-peptide and a 22-peptide both extending to the C-terminal and lacking the N-terminal blocking group. A combination of Edman microsequencing, carboxypeptidase Y and thermolysin digestion, and fast atom bombardment mass spectrometry was used.
Study Information
pubmed
1983
10.1111/j.1399-3011.1983.tb03082.x