LL-37
LL-37 is the human cathelicidin antimicrobial peptide studied in immune and tissue-repair research.
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Research use only. Not for human or veterinary use. Not FDA approved. Supplied as lyophilized powder in a sterile vial for in-vitro laboratory research by qualified professionals.
Storage & Stability — Research Handling Guidance
- 🧊Lyophilized (sealed vial): store at −20 °C; typically stable 24+ months.
- ❄️Reconstituted: refrigerate at 2–8 °C and use within ~30 days.
- 🔄Avoid repeated freeze/thaw cycles — aliquot before freezing if needed.
- 🌞Protect from light — keep the vial in its carton or amber storage.
General peptide storage guidance for laboratory settings. Research use only — not for human or veterinary use.
About LL-37
LL-37 is a 37-residue cationic peptide and the only human member of the cathelicidin family of antimicrobial peptides, named for the two leucine residues at its N-terminus. Beyond its host-defense origin, its amphipathic structure makes it a tool for investigating membrane interactions and innate-immune signaling.
Researchers examine LL-37 in studies of antimicrobial activity, immune modulation, wound-environment models, and angiogenesis. It is supplied as a lyophilized powder intended for reconstitution in suitable solvent under laboratory conditions, manufactured to ≥98% purity with a certificate of analysis available on request. This material is sold strictly for research use only.
LL-37 — Frequently Asked Questions
LL-37 — what is it?
LL-37 is the human cathelicidin antimicrobial peptide studied in immune and tissue-repair research.
How pure is LL-37, and is there a COA?
LL-37 is ≥98% purity, checked by HPLC. Want the COA? Ask for it and we'll send it over, so you can confirm identity and purity before you use it.
What does LL-37 ship as, and how do I store it?
LL-37 comes as a freeze-dried powder in a sterile vial. Keep it cold and out of the light until you use it. Once you reconstitute it, refrigerate it and handle it the way you would any peptide in solution.
What sizes does LL-37 come in, and what do they cost?
LL-37 comes in 5mg. It starts at $38.00 a vial, and the bigger quantities come down from there — up to 35% off. Shipping inside the US is free, whatever you order.
Is LL-37 for human use?
No, and that isn't a formality. LL-37 is sold for in-vitro laboratory research by qualified professionals only. It is not for human or veterinary use, and it is not FDA approved for any therapeutic purpose.
How do I order and pay for LL-37?
Put LL-37 in the cart and check out here. Pay by PayPal or Bitcoin. Orders confirmed before 2 PM ET leave the US the same day; anything later goes the next day. New to Bitcoin? There's a five-minute guide linked at checkout.
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