Glossary · 2026-09-24
By Alice Kay · Last reviewed 24 Sep 2026
Amino-acid sequence, laboratory definition
Research-use notice: This article summarizes published scientific literature for educational purposes. It is not medical advice and does not provide dosing, administration or human-use information. Findings described in the literature do not apply to any BlueNex Labs product, which is supplied only for in-vitro laboratory research and not for human or animal use.
A sequence is the order of amino-acid residues, written from the N-terminus in one-letter or three-letter code. Some catalogue pages state that string. Epithalon is listed as Ala-Glu-Asp-Gly. BPC-157 is listed as GEPPPGKPADDAGLV, a 15-residue chain, on the pentadecapeptide term and in What is BPC-157?. Those strings are catalogue identity text.
A sequence on a web page is not a mass spectrum. Identity work compares an observed mass with a mass calculated from the sequence and the species the report names. For the structure note, see peptide structure and stability. For the shop URLs, see Epithalon 10 mg and BPC-157 10 mg. Research use only.
Frequently asked questions
- Does the shop title replace the sequence?
- No. A product name is a catalogue label. Use the residue string the page or the lot file actually prints.
- Is a published sequence the result for every later lot?
- No. The string tells you what the calculation should start from. The lot file is what you compare with the vial you received.
Research use only. BlueNex Labs does not provide medical or veterinary advice. Confirm your institution’s policies before purchase. How a comparison or class note is checked sits on documentation standards. Articles are written and reviewed by Alice Kay, Ph.D.