Understand the source comparison
KPV vs LL-37: Research Peptide Comparison
The table below summarises the key distinguishing characteristics between KPV and LL-37 across structure, mechanism, application, and handling. Molecular Weight 341 Da (tripeptide) 4493 Da (37 amino acids) KPV is 13× smaller, enabling faster tissue penetration
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- The table below summarises the key distinguishing characteristics between KPV and LL-37 across structure, mechanism, application, and handling.
- Molecular Weight
- 341 Da (tripeptide)
- 4493 Da (37 amino acids)
- KPV is 13× smaller, enabling faster tissue penetration but shorter half-life
- Primary Mechanism
- NF-κB inhibition, anti-inflammatory
- Antimicrobial membrane disruption, immune cell recruitment
- KPV modulates inflammation; LL-37 kills pathogens and recruits immune response
- Half-Life (Serum)
- 15–30 minutes
- 60–90 minutes
- Both are short-lived; LL-37 persists longer in circulation
- Antimicrobial Activity
- None
- Direct bactericidal, fungicidal, antiviral (MIC 1–10 μM)
- Only LL-37 exhibits pathogen-killing activity
- Typical Concentration Range
- 10–100 μM in vitro
- 1–10 μM antimicrobial assays; 0.1–5 mg/mL in vivo
- LL-37 effective at lower molar concentrations for antimicrobial endpoints
- Reconstitution
- Bacteriostatic water, pH neutral
- Slightly acidic buffer (pH 5–6) preferred to prevent aggregation
- KPV is simpler to reconstitute; LL-37 requires pH control
- Storage Post-Reconstitution
- 2–8°C, use within 30 days
- 2–8°C, use within 30 days; avoid freeze-thaw cycles
- Both degrade rapidly at room temperature; single-use aliquots recommended
- Regulatory Pathway Research
- Inflammatory signalling, cytokine suppression
- Infection models, wound healing, immune recruitment
- Select based on experimental question, not perceived potency