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Peptide blend
Molecular formula
C33H57N11O9
Molecular weight
~751.9 g/mol
CAS number
129954-34-3
Sequence
Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP)
Molecular formula
C37H51N9O10S
Molecular weight
~813.9 g/mol
CAS number
80714-61-0
Sequence
Met-Glu-His-Phe-Pro-Gly-Pro (MEHFPGP)
Both peptides belong to the 'glyproline-stabilized' class: a short N-terminal sequence is extended with a C-terminal Pro-Gly-Pro (PGP) tripeptide that slows proteolysis. Selank corresponds structurally to the tetrapeptide tuftsin sequence (Thr-Lys-Pro-Arg) carrying the C-terminal PGP extension, giving the heptapeptide Thr-Lys-Pro-Arg-Pro-Gly-Pro. Semax is a synthetic peptide corresponding to the ACTH(4-7) sequence (Met-Glu-His-Phe) carrying the same C-terminal PGP extension, giving the heptapeptide Met-Glu-His-Phe-Pro-Gly-Pro; its N-terminal methionine residue is susceptible to oxidation. The shared PGP scaffold is the common structural feature characterized across both molecules, and the C-terminal glyproline motif is described in the chemistry literature as the modification that resists enzymatic degradation.
Lyophilized
Store frozen and protected from light and moisture
commonly handled at -20°C for long-term storage as a sealed lyophilized powder.
The C-terminal Pro-Gly-Pro motif confers resistance to enzymatic degradation; The methionine residue in Semax is susceptible to oxidation — protect from light and air. Avoid repeated freeze-thaw cycles. For research use only; not for human or veterinary use.
Reviews
Dergunova LV, Filippenkov IB, Limborska SA, et al. (2023). Genes (Basel)
Koroleva SV, Myasoedov NF. (2018). Biology Bulletin
Reviews
Vyunova TV, Andreeva L, Shevchenko K, Myasoedov N. (2018). Protein and Peptide Letters
Clinical
Gusev EI, Martynov MY, Kostenko EV, et al. (2018). Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova
Medvedev VE, Tereshchenko ON, Kost NV, et al. (2015). Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova
Zozulya AA, Neznamov GG, Syunyakov TS, et al. (2008). Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova
Uchakina ON, Uchakin PN, Miasoedov NF, et al. (2008). Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova
Gusev EI, Skvortsova VI, Miasoedov NF, et al. (1997). Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova
Primary research
Inozemtseva LS, Yatsenko KA, Glazova NYu, et al. (2024). European Journal of Pharmacology
Panikratova YaR, Lebedeva IS, Sokolov OYu, et al. (2020). Doklady Biological Sciences
Filatova E, Kasian A, Kolomin T, et al. (2017). Frontiers in Pharmacology
Kasian A, Kolomin T, Andreeva L, et al. (2017). Behavioural Neurology
Volkova A, Shadrina M, Kolomin T, et al. (2016). Frontiers in Pharmacology
Medvedeva EV, Dmitrieva VG, Povarova OV, et al. (2014). BMC Genomics
Inozemtseva LS, Karpenko EA, Dolotov OV, et al. (2008). Doklady Biological Sciences
Dolotov OV, Karpenko EA, Inozemtseva LS, et al. (2006). Brain Research
Eremin KO, Kudrin VS, Saransaari P, et al. (2005). Neurochemical Research
Kost NV, Sokolov OYu, Gabaeva MV, et al. (2001). Russian Journal of Bioorganic Chemistry
Zozulya AA, Kost NV, Sokolov OYu, et al. (2001). Bulletin of Experimental Biology and Medicine
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