Most compounds in this category are short synthetic peptides, from heptapeptides to a 28-residue C-terminally amidated sequence, filed under the conventional literature name for the group. Several share a proline-rich backbone, and some are listed as N-acetylated or C-terminally amidated variants of a parent sequence, which shifts the expected mass by +42.0 Da or −0.98 Da respectively. The listing describes each compound only by its chemistry: name and aliases, residue count, one-letter sequence, molecular formula, average molecular weight and CAS number where one has been assigned. Each vial contains lyophilized powder at the stated nominal quantity, and the analytical report scope is HPLC purity plus mass-spectrometry identity.
Listed here: Semax, Selank, DSIP, ARA-290, Cerebrolysin, N-Acetyl Semax Amidate, N-Acetyl Selank Amidate, VIP (10mg, 16mg, 30mg). Each product page lists the CAS number, molecular formula, molecular weight and, for peptides, the amino-acid sequence. Reported HPLC purity is shown per product; the HPLC and mass-spectrometry identity report is sent by email on request, before you order if you want to see it first.
Guides: Science.bio Closed (January 2026): Closure Date, Official Notice, Current Status and Sources · Semax, Selank and Their N-Acetyl Amidates: Sequences, Mass Differences, CAS and Salt Form
Frequently asked questions
Which neuropeptides does Pepta Labs list?
This category currently lists 8 compounds: Semax, Selank, DSIP, ARA-290, Cerebrolysin, N-Acetyl Semax Amidate, N-Acetyl Selank Amidate and VIP, each supplied as lyophilized powder in a sealed vial at the nominal quantity printed on the label. Each product page states the name and aliases, CAS number where one has been assigned, molecular formula, average molecular weight and, for the defined-sequence peptides, the one-letter sequence, the reported HPLC purity for the listing and, where a verified record exists, the structural class, residue count and typical salt form.
What does neuropeptide mean in this catalogue?
It is the conventional literature name for the group; the listings describe each compound only by its chemistry. Most entries are short synthetic peptides, from heptapeptides to a 28-residue sequence, several with a proline-rich backbone, and some are listed as N-acetylated or C-terminally amidated variants of a parent sequence. For each, the product page gives the residue count, one-letter sequence, molecular formula, average molecular weight and CAS number, and peptide sequence notation explains how the acetyl and amide groups are written.
What is the difference between Semax and N-Acetyl Semax Amidate?
Only the terminal groups: N-Acetyl Semax Amidate has the same seven-residue sequence as Semax with an N-terminal acetyl group and a C-terminal amide. An N-terminal acetyl group adds 42.0 Da to the expected mass and replacing the C-terminal acid with an amide subtracts 0.98 Da, so an N-acetyl amidate variant is expected about 41 Da heavier than its parent sequence, and the mass-spectrometry identity report distinguishes the two by that difference. The Semax, Selank and their N-acetyl amidates guide lists the sequences, mass differences, CAS numbers and salt forms side by side, and the expected mass table explains average versus monoisotopic values.
Are these neuropeptide research vials shipped within the USA?
Yes, to United States addresses only, as sealed vials of dry lyophilized powder at ambient temperature without cold packs. Vial labels identify the compound, quantity and research-use designation and do not carry lot or batch numbers.