LL-37 5mg Peptides
LL-37 is supplied as a peptide lyophilized vial with a material quantity of 5mg. The active ingredient is LL-37. Package quantity is one vial. Specifications are defined to support clear identification of compound, strength, and format so researchers can plan and document laboratory, analytical, and experimental work without ambiguity.
The material is suited to antimicrobial-peptide research contexts, including peptide characterization, pathway investigation, and receptor-signaling studies conducted in controlled experimental models. The lyophilized format provides predictable handling within standard laboratory workflows and supports reproducible setup across repeated runs and comparative analyses. Clear strength and unit definitions enable straightforward specification in protocols, inventory systems, and study records.
- Active ingredient: LL-37
- Material quantity per vial: 5mg
- Total supplied quantity: 5mg
- Units per package: 1 vial
- Physical format: Peptide lyophilized vial
- Category: Antimicrobial Peptides
FOR RESEARCH USE ONLY. NOT FOR HUMAN OR ANIMAL USE OR CONSUMPTION.
This material is supplied solely for legitimate laboratory, analytical, and experimental research. It is not intended to diagnose, treat, cure, mitigate, or prevent any disease or condition. No dosing, reconstitution, administration, or medical-use instructions are provided.
- 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.
We prioritize your satisfaction above all, which is why we offer a 100-day, no-questions-asked guarantee on all our products. Learn more about our return policy.
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 Function Dose
Not all peptide vendors hold themselves to the same verification standards.
| VERIFICATION STANDARD | Function Dose | 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.
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.
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.
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. Function Dose supplies synthetic AMP reference compounds for in vitro research use only.
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 Function Dose are intended strictly for in vitro laboratory research and are not drugs, supplements, or therapeutics.
