Только для использования в лабораторных исследованиях. Не для употребления человеком. Не для клинического или терапевтического применения. Не оценивалось FDA.
Исследовательское сравнение
Semax vs Selank
Semax and Selank are both synthetic heptapeptides ending in the same Pro-Gly-Pro extension, but they start from different parent sequences. Semax (MEHFPGP) extends the ACTH(4-7) fragment; Selank (TKPRPGP) extends tuftsin. Semax contains methionine, so its formula carries sulfur (C37H51N9O10S, 813.93 g/mol); Selank is C33H57N11O9 at 751.89 g/mol.
| Параметр | Semax | Selank |
|---|---|---|
| Peptide class / structure | Linear heptapeptide — ACTH(4-7) fragment + Pro-Gly-Pro | Linear heptapeptide — tuftsin analog + Pro-Gly-Pro |
| Sequence | MEHFPGP | TKPRPGP |
| Parent sequence | ACTH(4-7): Met-Glu-His-Phe | Tuftsin: Thr-Lys-Pro-Arg |
| Shared structural feature | C-terminal Pro-Gly-Pro | C-terminal Pro-Gly-Pro |
| Length (residues) | 7 aa | 7 aa |
| Molecular formula | C37H51N9O10S | C33H57N11O9 |
| Molecular weight | 813.93 g/mol | 751.89 g/mol |
| CAS number | 80714-61-0 | 129954-34-3 |
| Supplied as | Lyophilized powder, 10 mg vial | Lyophilized powder, 10 mg vial |
| COA on file | Yes (Kovera Labs) | Yes (Kovera Labs) |
Часто задаваемые вопросы
What do Semax and Selank have in common structurally?+
Both are seven residues long and both end in Pro-Gly-Pro, a tripeptide extension added to a short parent sequence. The parent sequences differ: Semax starts from ACTH(4-7) (Met-Glu-His-Phe) and Selank from tuftsin (Thr-Lys-Pro-Arg).
How do their molecular formulas and weights differ?+
Semax is C37H51N9O10S (813.93 g/mol); the sulfur comes from its N-terminal methionine. Selank is C33H57N11O9 (751.89 g/mol); its lysine and arginine side chains account for the higher nitrogen count.
Are both supplied lyophilized?+
Yes — both are supplied as lyophilized powder. Store unopened vials at −20 °C for the long term (2–8 °C short term), protected from light and moisture, and avoid repeated freeze–thaw once in solution.