LL-37 5mg research peptide vial, lyophilized powder, Elite Biologix, SKU YPB.244

LL-37 (5mg)

$120.00

SKU: YPB.244 Category:

Description

A single-component research material supplied for controlled research environments. LL-37 is the C-terminal cathelicidin peptide (human hCAP18 fragment), a 37-residue cationic α-helical sequence used in research investigating peptide–membrane interaction, antimicrobial peptide chemistry, and receptor-binding characterization in model systems.

Composition

• LL-37 (cathelicidin antimicrobial peptide, hCAP18 C-terminal fragment)
• Appearance: Lyophilized powder in a sealed research vial

Research Focus (non-clinical)

• Peptide identity and purity assessment via HPLC/LC-MS
• In-vitro characterization of cationic peptide–membrane interaction in bacterial and enveloped-particle model systems
• Receptor-binding and displacement assay development, including MRGPRX2 ligand characterization in cultured cell models
• Assay development and calibration for quantitative analysis of an α-helical cationic peptide
• Stability and solubility profiling of a lyophilized peptide under controlled laboratory storage conditions

For qualified research professionals and institutional laboratories. Not for human use.

Documentation & Quality Assurance

Each lot is sourced through our verified global supply chain with emphasis on traceability and quality control. We work diligently to obtain and maintain third-party analytical reports and Certificates of Analysis for each batch — covering qualitative identity, percent purity, quantitative assay, heavy metals (ICP-MS) and microbial counts (TAMC/TYMC), as part of our ongoing quality process. These documents are reviewed internally and displayed as they become available. Independent third-party testing is also performed on select lots to confirm identity, purity, and alignment with our internal specifications.

Important Notice

LL-37 is sold exclusively for laboratory and research purposes. It is not approved for human use by the FDA or any regulatory authority.

This product is intended for laboratory research use only. It is not intended for human or veterinary use, and must not be used for diagnostic, therapeutic, or clinical purposes.
This material is not a drug, medical device, or dietary supplement, and has not been evaluated by the U.S. Food and Drug Administration.

Quality & Manufacturing

All materials are sourced from carefully vetted domestic and international manufacturing partners who follow quality systems consistent with ISO and cGMP principles. Each supplier is reviewed for reliability, documentation integrity, and transparency in testing.

We require a verified purity of 98% or higher and perform independent third-party batch testing to confirm that lots meet our internal specifications for identity, purity, and composition. Certificates of Analysis report qualitative identity and percent purity by UV-Vis, quantitative assay, heavy metals by ICP-MS, and total aerobic microbial (TAMC) and total yeast and mold (TYMC) counts. These are bioburden and composition panels for research quality assessment only; they are not sterility or endotoxin testing, and they do not imply suitability for human or veterinary use.

All research materials are sealed for integrity and packaged for stability during storage and transport from manufacturing through final delivery.

Additional information

Weight 0.0625 lbs
Dimensions 6 × 4 × 3 in

Certificate of Analysis

LL-37 (5mg)

BatchLL375202026
TestedMay 13, 2026
Purity99.8%
Assay5.79mg
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Storage Instructions

All products from Elite Biologix are manufactured using a lyophilization (freeze-drying) process. This method is designed to maintain product integrity and allows vials to remain stable during shipping for approximately 3–4 months.

Once a vial is reconstituted with bacteriostatic water, it should be stored in the refrigerator to help maintain stability. Under these conditions, reconstituted material is generally considered stable for up to 30 days.

Lyophilization is a dehydration technique in which compounds are frozen and then exposed to low pressure. This causes the water in the vial to sublimate directly from solid to gas, leaving behind a stable, crystalline white structure. This powder can be kept at room temperature until reconstitution.

Upon receipt, products should be stored away from heat and light. For short-term use, refrigeration at approximately 4°C (39°F) is suitable. For long-term storage (several months to years), vials may be placed in a freezer at approximately -80°C (-112°F). Freezing is the preferred method for preserving product stability over extended periods.

⚠️ Important Notice:
These products are intended for research use only. Not for human consumption.

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Frequently Asked Questions

Essential information about our research-grade peptides and quality standards.

Peptides are short chains of amino acids linked by peptide bonds, typically consisting of 2-50 amino acids. They serve as the building blocks of proteins and play crucial roles in biological processes.

Research peptides are synthesized versions of naturally occurring peptides, manufactured to precise specifications for use in scientific studies.

Key characteristics: High purity (≥98%), lyophilized form for stability, accompanied by Certificates of Analysis (COA), and manufactured under strict quality control protocols.

Peptide purity refers to the percentage of the target peptide present in a sample, determined by third-party analytical testing and reported on the batch Certificate of Analysis.

Our Standard: All our research peptides maintain ≥98% purity, verified by third-party laboratory testing and documented in our Certificates of Analysis.

Higher purity is critical for research because impurities can interfere with experimental results and compromise the reproducibility of studies.

All products are supplied in lyophilized powder form within sterile, sealed vials. This format provides:

  • Maximum stability: Extended shelf life compared to liquid solutions
  • Precise measurement: Researchers can work with desired quantities
  • Contamination protection: Sealed vials prevent environmental exposure
  • Shipping durability: Powder form is more stable during transit

Lyophilized peptides:

  • Store at -4°F for long-term storage (up to 24 months)
  • Store at 36-46°F (refrigerated) for short-term storage (up to 3 months)
  • Keep away from light, moisture, and repeated temperature fluctuations

We supply research-grade peptides to:

  • Academic and university research laboratories
  • Pharmaceutical and biotechnology companies
  • Independent research institutions
  • Licensed professionals conducting legitimate scientific research

We maintain rigorous quality control through a multi-step verification process:

  • Purity & Assay: Every batch tested to verify ≥98% purity and label-claim quantity
  • Identity Confirmation: Qualitative ID matched against a characteristic reference standard
  • Third-Party Testing: Independent laboratory verification
  • Heavy Metals & Microbial: ICP-MS heavy-metal screening plus total aerobic (TAMC) and yeast & mold (TYMC) counts
  • Aseptic Handling: Aseptic handling and packaging procedures
  • Batch Documentation: Complete traceability from synthesis to delivery

"Research Use Only" (RUO) is a classification indicating that a product is intended exclusively for laboratory research and experimental investigation.

All orders are shipped with research-grade handling protocols:

  • Packaging: Insulated containers with cold packs when required
  • Carriers: USPS Priority Mail
  • Processing: Orders placed before 12 PM EST ship same business day
  • Tracking: Full tracking information provided via email

We stand behind every product:

  • Quality guarantee: Full replacement or refund if products don't meet stated specifications
  • Shipping issues: Free replacement for damaged or lost shipments
  • Unopened returns: Accepted within 30 days for store credit
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⚠️ Research Use Only — Legal Acknowledgment

All products on this website are sold strictly for in vitro research and laboratory use only.

  • Not for human or veterinary use, consumption, or application
  • Not FDA-approved to diagnose, treat, cure, or prevent any disease
  • Buyer assumes full responsibility for legal compliance in their jurisdiction
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This information is collected for merchant compliance and regulatory purposes.

Please select your research affiliation to continue.

By clicking "Accept," you confirm:

  • You are at least 21 years of age
  • You are a qualified researcher or laboratory professional
  • You represent the affiliation type selected above
  • You understand these products are for research purposes only

Your selection is stored locally and may be recorded for compliance purposes.