Para uso exclusivo em pesquisa laboratorial. Não destinado ao consumo humano. Não destinado a uso clínico ou terapêutico. Não avaliado pela FDA.
Comparação de pesquisa
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.
| Atributo | 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) |
Perguntas frequentes
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.