Side-by-Side Comparison · 2026

Cathelicidin (LL-37) vs Esculentin

Cathelicidin (LL-37) vs Esculentin — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Cathelicidin (LL-37)
Antimicrobial Peptide

LL-37 is the sole human cathelicidin antimicrobial peptide, derived by proteolytic cleavage of the 18 kDa precursor hCAP18 (encoded by the CAMP gene). It is produced by neutrophils, epithelial cells of the skin, gut, and airways, and mast cells....

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Esculentin
Antimicrobial Peptide

Esculentins are the longest known naturally occurring antimicrobial peptides, isolated from the skin of the water frog Rana esculenta. At 46 amino acids, they form two amphipathic helices connected by a short linker....

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Key Parameters
Parameter Cathelicidin (LL-37) Esculentin
Category Antimicrobial Peptide Antimicrobial Peptide
Research Clinical Research Preclinical
Half-Life < 10 min (plasma) Minutes (proteolytic)
Typical Dose Research: 1-100 ug/mL (topical) N/A
Frequency Varies by application N/A
Route Endogenous; topical/inhalation (research) Research only
FDA Status No approval (clinical trials ongoing) Not approved

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Frequently Asked Questions
What is the difference between Cathelicidin (LL-37) and Esculentin?
Cathelicidin (LL-37): LL-37 is the sole human cathelicidin antimicrobial peptide, derived by proteolytic cleavage of the 18 kDa precursor hCAP18 (encoded by the CAMP gene). It is produced by neutrophils, epithelial cells o... Esculentin: Esculentins are the longest known naturally occurring antimicrobial peptides, isolated from the skin of the water frog Rana esculenta. At 46 amino acids, they form two amphipathic helices connected by...
Which has a longer half-life, Cathelicidin (LL-37) or Esculentin?
Cathelicidin (LL-37) half-life: < 10 min (plasma). Esculentin half-life: Minutes (proteolytic).
Can you stack Cathelicidin (LL-37) and Esculentin?
Cathelicidin (LL-37) and Esculentin are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.