LL-37 5mg Peptides
When research demands clarity, start with a peptide you can trust.
Better Molecule LL-37 is a lyophilized peptide vial designed for serious laboratory work, delivering a total of 5mg of the human cathelicidin LL-37 in a clean, stable format. This antimicrobial host-defense peptide is presented as a dry, white lyophilized solid in a sealed research vial for controlled reconstitution and precise experimental use.
- Each vial contains 5mg of LL-37, supporting rigorous investigation of innate immune pathways, antimicrobial activity, membrane interactions, biofilm dynamics, and cell signaling in in vitro or ex vivo research models.
Developed for laboratory workflows, this vial format provides consistent handling from bench to analysis. The peptide is suitable for reconstitution with appropriate sterile diluents and buffers as determined by protocol design, allowing researchers to tailor concentration, aliquoting, and assay conditions to their specific applications. LL-37 is frequently explored across microbiology, cell culture, materials testing, and mechanism-of-action studies where sequence integrity, purity, and reliable dissolution are essential.
Every lot reflects Better Molecule’s disciplined quality approach. LL-37 is produced under controlled conditions and evaluated for identity and purity using independent analytical testing. Each batch is supported by lot-level traceability and a certificate of analysis to aid method validation and documentation. Temperature-conscious handling, moisture protection, and careful packaging help preserve peptide integrity from our facility to your lab.
Choose LL-37 from Better Molecule when experimental precision matters. Our focus is straightforward: dependable sourcing, consistent composition, and transparent documentation, so your team can concentrate on building robust data with a peptide that meets exacting laboratory standards.
Research Use Only: This material is furnished for laboratory research and development purposes exclusively. It is not a drug, food, or cosmetic, and is not intended for human or veterinary use. Do not ingest, inject, or apply to the body. Handle using appropriate laboratory practices and comply with all applicable regulations.
- Most orders ship within 24 hours and arrive within 3 to 5 days of leaving our warehouse.
- Shipping is free on orders of $99+ (except Hawaii and Alaska).
- All orders ship in discreet packaging via USPS Ground Advantage mail.
Delivery restrictions vary by state.
This Product Contains
Research Applications
Our catalog supports controlled laboratory research across areas such as:
- Cellular Signaling — receptor activity, signaling pathways, and molecular interactions
- Metabolic Research — metabolic regulation and incretin receptor-signaling models
- Neurobiology — cognitive, behavioral, and stress-response pathways
- Immunology — immune signaling and host-response models
- Tissue Biology — extracellular-matrix signaling, cellular migration, and tissue remodeling research
- Mitochondrial Biology — cellular energy systems and aging-related pathways
- Endocrine Research — neuroendocrine and reproductive-axis signaling
- Pigment Biology — melanogenesis and related cellular pathways
Research relevance varies by compound and study design. Review the product information and batch-specific documentation before use. All products are intended strictly for laboratory research and are not for human or animal use, therapeutic use, or clinical application.
Research Materials Backed by Clear Documentation
- 99%+ Analytical Purity Where Confirmed by the Applicable Batch COA.
- Third-Party Testing Performed by an ISO/IEC 17025-Accredited Laboratory, Where Applicable.
- Batch-Specific Certificates of Analysis Available for Applicable Research Materials.
- Ships from the U.S.
Orders are dispatched from our U.S. fulfillment center, typically within 1–2 business days. - Clear Product Specifications
Strength, format, quantity, and available batch documentation are presented for review. - Research-First Standards
Our catalog and documentation are built for laboratory research—not consumer, wellness, or therapeutic use.
Storage & Handling
- Product-Specific Storage
This product is supplied as a freeze-dried material. Keep the original container sealed and follow the storage condition shown on the product label or available documentation.
Follow the format-specific instruction shown above. Product-specific label or documentation requirements take priority over the general handling guidance below. - Keep the Original Container Sealed
Until the material is needed for laboratory work, keep it in its original sealed container. Protect it from moisture, unnecessary light exposure, and avoidable temperature fluctuations. - Inspect the Package on Receipt
Check the container, seal, and packaging for visible damage, condensation, or signs of a temperature excursion. Record any issue before placing the material into laboratory storage. - Document Laboratory Handling
Record the material name, batch information, receipt date, storage location, and relevant handling conditions according to your laboratory’s procedures. - After Opening or Preparation
Once the original sealed state changes, follow the product documentation and your laboratory’s validated protocol. Clearly label any prepared material with the preparation date, composition, and applicable storage condition. - Avoid Unnecessary Temperature Cycling
Minimize repeated warming and cooling. Avoid repeated freeze-thaw cycles when frozen storage is required by the applicable protocol. - Use Material-Specific Conditions
Storage requirements can differ between lyophilized, liquid, and prepared materials. Do not apply one temperature, solvent, or stability period to every product.
Reliable U.S. Order Fulfillment
- Order Processing
In-stock orders are generally processed within 1–2 business days, Monday through Friday. Orders are not processed or shipped on weekends. - Standard Delivery
Domestic delivery typically takes 3–5 business days, depending on the destination and carrier. - Shipment Tracking
Tracking information is provided after the order ships so delivery progress can be monitored. - Careful, Discreet Packaging
Each order is packed with care to help protect the contents and maintain privacy during transit. - Nationwide U.S. Shipping
Orders can be shipped within the United States where permitted by applicable federal and state law. - Possible Delays
Carrier conditions, weather, holidays, backorders, and periods of high order volume may affect processing or delivery times.
Why Researchers Choose Better Molecule
Not all peptide vendors hold themselves to the same verification standards.
| VERIFICATION STANDARD | Better Molecule | GENERIC VENDORS |
|---|---|---|
| Purity Standard | Batch-Specific Analytical Purity — See Applicable COA | Often Not Disclosed |
| Third-Party Testing | Independent Laboratory | Testing Source Often Unclear |
| COA Published | Batch-Specific COA Available | Inconsistent Availability |
| Batch Traceability | Product, Strength & Lot Matched | Batch Match Often Unclear |
| U.S. Fulfillment | Ships Domestically | Often Ships From Overseas |
| Research Use Standard | Clearly Defined | Standards May Vary |
Frequently Asked Questions
Find answers to common questions about this product, its research context, Certificates of Analysis (COAs), ordering, and laboratory use.
What is LL-37 typically studied for?
Researchers usually study LL-37 for innate immunity, antimicrobial activity, biofilm-related questions, inflammatory signaling, and extracellular-matrix environment biology. Because it sits at the intersection of immunity and matrix signaling, it often appears in experimental discussions of both infection control and cellular-migration pathways.
How do antimicrobial peptides differ from antibiotics?
Classical antibiotics are usually small-molecule compounds — many derived from microbial secondary metabolites — that act on specific bacterial targets such as cell wall synthesis, ribosomes, or DNA replication. Antimicrobial peptides, by contrast, are short amino acid chains produced as part of the innate immune response, and their primary research-studied mechanism typically involves direct interaction with microbial membranes rather than a single enzymatic target.
Because AMPs often act on membrane structure rather than one discrete protein, they have been of research interest in the context of membrane biophysics and resistance evolution. This makes them a distinct class of study from conventional antibiotics, even when the two are sometimes grouped together in broader antimicrobial research literature.
Where do antimicrobial peptides occur naturally?
Antimicrobial peptides are found across essentially every branch of life. In mammals, well-studied examples include cathelicidins (such as LL-37) and defensins, which are expressed in skin, mucosal surfaces, neutrophils, and epithelial tissues. In amphibians, insects, and plants, AMPs form a major part of innate immunity and are secreted in skin, hemolymph, seeds, and other tissues.
This broad distribution across kingdoms is one reason AMPs are a significant subject of biological research — they represent a conserved, ancient strategy for host defense. Better Molecule supplies synthetic AMP reference compounds for in vitro research use only.
What are antimicrobial peptides?
Antimicrobial peptides (AMPs) are short, naturally occurring chains of amino acids that act as part of the innate immune defense in virtually all living organisms — from bacteria and plants to insects, amphibians, and mammals. They are typically between 10 and 50 amino acids long and often carry a net positive charge, which allows them to interact with negatively charged microbial membranes.
In research, AMPs are studied as a broad and evolutionarily ancient class of host defense molecules. They are investigated in the context of innate immunity, membrane biology, structure–activity relationships, and microbial resistance. All AMPs offered by Better Molecule are intended strictly for in vitro laboratory research and are not drugs, supplements, or therapeutics.
