Research peptide
Pack of 10Lyophilised powder. Requires bacteriostatic water or dilute acetic acid for reconstitution.
Product images are illustrations. The vials you receive may look different from the ones pictured. The compound, the strength and the count are what the listing says.
Research peptide
LL-37
In the catalogue
Research use only. Not for human or veterinary consumption. 18+.
Available as 5mg, sold by the 10-vial kit. The price falls as the total kits in your basket rise, counted across every compound.
5mg
LL375
$230
per 10-vial pack
$23.00 per vial
$4.60 per mg
Set a quantity against any strength. Your tier is set by the total kits in your basket across every compound, not per line, so keep adding across the catalogue and the discount follows. Supplies and gram sizes price differently — the ladder is published in full.
- PresentationLyophilised powder
- Units per kit10 vials
- Minimum orderOne 10-vial kit
- Shipping$79, free over $1,500
- Third-party testComing soon
- Importer of recordYou — check what you may import
Research use only. Not for human or veterinary consumption. 18+.
Details
What it is
The 37-residue mature peptide released from hCAP18, the only cathelicidin found in humans. It is named for its length and its two leading leucines. An amphipathic helix, which is the structural feature shared by most antimicrobial peptides of the innate immune system.
Also sold as: cathelicidin LL-37, CAP-18, hCAP18
- As suppliedLyophilised powder.
- Into solutionBacteriostatic water. Adsorbs to plastic, so glass is preferred for storage.
Reconstitution and handling
Handling
- As suppliedLyophilised powder
- Sealed, refrigeratedMonths
- In solutionRefrigerate, use short-term
Concentration is mass divided by the volume you added. A 5mg vial made up to one millilitre of solvent gives 5mg per millilitre; to two millilitres, half that. Record the volume you used: a solution whose concentration is not written down is a solution you cannot use quantitatively.
The full procedure is on our reconstitution guide, with a concentration calculator; what is known about keeping these materials is on storage and stability. Bacteriostatic water and acetic acid are both in our catalogue and can be ordered with a product or on their own.
Bulk pricing
Your tier is set by the total kits in your basket across every compound, not per line. The full ladder is published on our bulk pricing page: nothing is gated, there is no code to enter and nothing to apply for.
| Kits | Per kit | You save |
|---|---|---|
| 1 | $230 | — |
| 2–5 | $205 | 11% off, save $25 per kit |
| 6–15 | $185 | 20% off, save $45 per kit |
| 16+ | $175 | 24% off, save $55 per kit |
Identity
- Molecular formula
- C205H340N60O53
- Molar mass
- 4493 g/mol
- CAS number
- 154947-66-7
- PubChem CID
- 16198951
- InChIKey
- POIUWJQBRNEFGX-XAMSXPGMSA-N
Source: PubChem, compound 16198951, read 2026-09-12. We publish no purity figure or lot number of our own.
Sequence
L-SERINE, L-LEUCYL-L-LEUCYLGLYCYL-L-.ALPHA.-ASPARTYL-L-PHENYLALANYL-L-PHENYLALANYL-L-ARGINYL-L-LYSYL-L-SERYL-L-LYSYL-L-.ALPHA.-GLUTAMYL-L-LYSYL-L-ISOLEUCYLGLYCYL-L-LYSYL-L-.ALPHA.-GLUTAMYL-L-PHENYLALANYL-L-LYSYL-L-ARGINYL-L-ISOLEUCYL-L-VALYL-L-GLUTAMINYL-L-ARGINYL-L-ISOLEUCYL-L-LYSYL-L-.ALPHA.-ASPARTYL-L-PHENYLALANYL-L-LEUCYL-L-ARGINYL-L-ASPARAGINYL-L-LEUCYL-L-VALYL-L-PROLYL-L-ARGINYL-L-THREONYL-L-.ALPHA.-GLUTAMYL-
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Research use only. Not for human or veterinary consumption. 18+.