Name: LL37
Brand: Lilipeptide
SKU: LILI-ll37
Price: 110.00 USD
Availability: InStock

What is LL-37?

LL-37 is cleaved from the precursor protein hCAP18 and is expressed by neutrophils, epithelial cells and other immune-related cell types throughout the body. Its name reflects the peptide’s first two residues, leucine-leucine, and its 37-amino-acid length, and it folds into an amphipathic alpha-helix that underlies much of its activity.

This listing is LL-37 from Lilipeptide (China), sold on Stairway to Gray with escrow: your payment is held until the order arrives and only then released to the brand.

How it is understood to work

LL-37 physically disrupts bacterial membranes and can neutralize bacterial endotoxin and break down established biofilms, functioning as part of the innate immune system’s first line of defense. Beyond direct antimicrobial action, it modulates immune-cell recruitment and cytokine release and has been linked to promoting epithelial repair and new blood vessel formation in study models.

Research status

LL-37 is studied extensively in antimicrobial-resistance research, biofilm-associated infection models, wound-healing biology and innate-immunity signaling, spanning bacterial, cell-culture and animal-model systems. It is a naturally occurring host-defense peptide rather than a drug candidate on its own, and research continues into engineered variants with improved selectivity.

This listing: Lilipeptide LL-37

Brand: Lilipeptide
Also sold by: Uther Peptide 5mg $95.00 · HK Peptide 5mg $75.00 · Lianhua Peptide Co. 5mg $46.00 · SSRBIO 5mg $81.90 · European Peptide Sciences 5mg $500.00 · Jinlu Peptides 5mg $210.00

Lab testing

There is no public lab report for this listing yet. We can ask the brand for the batch COA before you order. Many buyers also split an independent HPLC test with others who bought the same batch.

Request the batch COA · How group testing works

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

Specifications

Compound: LL-37
Also known as: Cathelicidin Antimicrobial Peptide (CAMP), hCAP18-derived peptide
Class: Human cathelicidin antimicrobial peptide
Form: Lyophilized (freeze-dried) powder
Molecular formula: C₂₀₅H₃₄₀N₆₀O₅₃
Molecular weight: 4493.37 g/mol
Brand: Lilipeptide · China

Handling & storage

Supplied as a lyophilized powder; keep unopened vials frozen and protected from light, and once reconstituted with bacteriostatic water, store refrigerated and use within the timeframe appropriate to your study.

Questions

Is LL-37 the same molecule in every mammal?

No, LL-37 specifically refers to the human cathelicidin peptide; other species produce related but structurally distinct cathelicidin peptides, so cross-species comparisons in the literature should be read with that distinction in mind.

Why is LL-37 of interest for antimicrobial-resistance research?

Because it kills bacteria by physically disrupting membranes rather than targeting a single enzyme or protein, it is studied as a model for antimicrobial mechanisms less prone to the resistance pathways that undermine many conventional antibiotics.

For laboratory research use only. Not for human or veterinary use. Nothing on this page is medical advice.