Semax/Selank is a two-peptide research blend containing Semax and Selank co-lyophilized in a 1:1 ratio, supplied as 10mg (5mg + 5mg) or 20mg (10mg + 10mg) vials. Semax is a synthetic heptapeptide (Met-Glu-His-Phe-Pro-Gly-Pro) derived from the ACTH(4-10) fragment, with the molecular formula C37H51N9O10S, a molecular weight of 813.93 g/mol and CAS number 80714-61-0. Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) based on the IgG-derived tetrapeptide tuftsin, with the formula C33H57N11O9, a molecular weight of 751.87 g/mol and CAS number 129954-34-3. Both peptides carry the same C-terminal Pro-Gly-Pro extension, a motif that resists cleavage by prolyl endopeptidases. Supplied as a white to off-white lyophilized powder, water-soluble, stored refrigerated at 2–8 °C. This product is strictly for research purposes only.
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