Research Overview

The Selank / Semax Blend pairs two of the most widely studied synthetic peptide research compounds — Selank and Semax — in a single lyophilized preparation containing 10 mg of each. Both are short synthetic heptapeptides derived from endogenous human sequences and stabilized with a C-terminal proline-glycine-proline (Pro-Gly-Pro) extension. Both are investigated in neuroscience and behavioral-research models, and supplying them together provides a convenient research tool for laboratories examining the two peptides in parallel.

Selank

Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) derived from the immunomodulatory peptide tuftsin, to which a Pro-Gly-Pro sequence was added to improve stability. In research it is examined in the context of anxiolytic- and nootropic-related pathways and neuroimmune signaling. It is also offered on its own as Selank.

Semax

Semax is a synthetic heptapeptide (Met-Glu-His-Phe-Pro-Gly-Pro) based on the ACTH(4-10) fragment, likewise stabilized with a C-terminal Pro-Gly-Pro. It is studied for neuroprotective- and nootropic-related activity in laboratory models. Related research compounds in the catalog include N-Acetyl Semax Amidate, Noopept, and P21.

Molecular Profiles

Selank (free base): sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro, molecular formula C₃₃H₅₇N₁₁O₉, average molecular weight 751.9 Da, CAS 129954-34-3. Semax (free peptide): sequence Met-Glu-His-Phe-Pro-Gly-Pro, molecular formula C₃₇H₅₁N₉O₁₀S, average molecular weight 813.9 Da, CAS 80714-61-0. Both values describe the free peptides; acetate or other salt forms carry additional mass.

Laboratory Handling

The blend is supplied as a co-lyophilized powder, soluble in water and standard aqueous buffers. It is kept sealed, cold, and protected from light and moisture until use. Each batch is third-party tested with a Certificate of Analysis.