Thymulin vs LL-37
A side-by-side research comparison — classification, molecular weight, mechanism, and how each is verified. For laboratory research use only.
01At a Glance
| Thymulin | LL-37 | |
|---|---|---|
| Classification | Immune | Immune |
| Molecular weight | 854.94 g/mol | 4,493.3 g/mol |
| Also known as | Facteur thymique sérique (FTS) | Cathelicidin antimicrobial peptide; CAP-18 |
| Purity spec | ≥99% HPLC | ≥99% HPLC |
| Verification | MZ Biolabs · 5-panel | MZ Biolabs · 5-panel |
| Use | Research Use Only | Research Use Only |
02How They Differ
Thymulin
A zinc-dependent thymic nonapeptide studied for thymocyte differentiation.
Thymulin is a thymic nonapeptide whose biological activity in research models is strictly zinc-dependent — the zinc-bound form is the active species. It is studied for its role in thymocyte differentiation and T-cell development.
LL-37
The human cathelicidin antimicrobial peptide studied for membrane interaction and innate immunity.
LL-37 is the only human cathelicidin-derived antimicrobial peptide, a 37-residue amphipathic α-helix. Its primary research property is interaction with and disruption of microbial membranes, the basis of its antimicrobial activity in vitro.
Research framing only · No human-use claims
03Selecting for a Research Model
Because Thymulin and LL-37 are both immune research compounds, they are frequently evaluated against one another. Selection depends on the research question, model system, and endpoints. Both are supplied strictly for laboratory research and are not for human or veterinary use.
Whichever you select, every Ethos Bio lot is verified the same way — a five-point independent panel with a batch-specific Certificate of Analysis. See how we test →
04FAQ
What is the difference between Thymulin and LL-37?
Thymulin is a immune research compound — A zinc-dependent thymic nonapeptide studied for thymocyte differentiation. LL-37 is also studied within the immune area — The human cathelicidin antimicrobial peptide studied for membrane interaction and innate immunity. They differ in molecular weight (Thymulin: 854.94 g/mol; LL-37: 4,493.3 g/mol). Both are for laboratory research use only.
What are the molecular weights of Thymulin and LL-37?
Thymulin: 854.94 g/mol. LL-37: 4,493.3 g/mol.
Are Thymulin and LL-37 in the same research class?
Yes — both are categorized as Immune research compounds.
How are Thymulin and LL-37 tested?
Both are analyzed by an independent third-party laboratory (MZ Biolabs, Arizona) on a five-point panel — HPLC purity, mass-spec identity, endotoxin, heavy metals, and sterility — with a batch-specific Certificate of Analysis per lot.