What it is
Kisspeptin-10 is the C-terminal decapeptide of a longer parent protein — ten residues carrying the receptor-binding region, with a C-terminal amide rather than a free acid. The amidation is present in the natural molecule and is required for the compound to be what the literature describes.
| Property | Value | Where it is confirmed |
|---|---|---|
| Residue count | 10 | Synthesis record |
| C-terminus | Amide | Synthesis record; identity result |
| Approximate mass | near 1,302 g/mol | Certificate of analysis |
| Character | Strongly basic; multiple Arg residues | Structure |
| Physical form supplied | Lyophilized solid | Label and batch record |
Three features, three lines on a report
- The amide cap. Replacing a terminal hydroxyl with an amino group makes the molecule about one mass unit lighter than the corresponding free acid. Material left as the acid is a plausible impurity, separable chromatographically, and a report should make clear which form it describes. This is the same check as on Ipamorelin and the GHRP family.
- A strongly basic chain. Several arginine residues give the molecule a high positive charge at working pH. Highly basic peptides interact with residual silanols on a reversed-phase column, which produces peak tailing — a broad, asymmetric main peak here is more likely a method artefact than evidence of an impurity. Knowing that prevents misreading the chromatogram. See how to read an HPLC chromatogram on peak shape.
- A tryptophan. Light-sensitive, and degrading by less predictable routes than a methionine. Several small early peaks are more consistent with tryptophan chemistry than with synthesis failure.
Why peak shape deserves attention here
Most of this library treats the chromatogram as a record of what is in the vial. For a very basic peptide it is also a record of how well the method suited the molecule. A tailing peak inflates its own integrated area and can swallow a small impurity sitting on its trailing edge, so a purity figure derived from a badly shaped peak is less trustworthy than the same figure from a sharp one — regardless of how high it is.
This is a case where reading the plot rather than the number is not a refinement but the whole point.
Storage of the lyophilized solid
Supplied as a freeze-dried solid, governed by temperature and moisture, with the tryptophan adding an argument for opaque storage. Highly basic peptides are also notably hygroscopic, so equilibration to room temperature before opening a vial matters.
Stability is a documented property rather than an assumed one: a laboratory establishes it by holding material under defined conditions and re-analysing at intervals. Where a retest date is stated, the question worth asking is what data supports it. See storing lyophilized research materials.
What the published literature covers
The research record is preclinical and comparatively recent, covering the kisspeptin receptor system, reproductive endocrinology in animal models, and receptor pharmacology in cell culture. Much of the literature concerns the longer parent protein or other fragment lengths, so matching the fragment studied in a paper to the material in a listing is a real consideration here.
The compound has not completed the regulatory process that would establish safety or efficacy for any medical indication, and findings in animal models and cell culture do not transfer automatically to other species. Arctic Lab Supply does not publish research conclusions, recommend applications, or provide guidance on experimental design.