Side-by-Side Comparison · 2026

Alamethicin vs Theta-Defensin

Alamethicin vs Theta-Defensin — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Alamethicin
Antimicrobial Peptide

Alamethicin is a 20-residue peptaibol (peptide with a high proportion of alpha-aminoisobutyric acid, Aib) from the fungus Trichoderma viride. It is the prototypical voltage-gated peptide ion channel, forming multi-state conductance channels in lipid bilayers whose opening probabi...

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Theta-Defensin
Antimicrobial Peptide

Theta-defensins are the only known cyclic peptides produced in the animal kingdom. Found in rhesus macaques and other Old World primates, they are formed by ligation of two 9-residue alpha-defensin gene products into an 18-residue macrocyclic structure....

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Key Parameters
Parameter Alamethicin Theta-Defensin
Category Antimicrobial Peptide Antimicrobial Peptide
Research Preclinical (research tool) Preclinical
Half-Life Membrane-stable Extended (cyclic stability)
Typical Dose N/A N/A (research only)
Frequency N/A N/A
Route Research only Systemic (research)
FDA Status Not approved Not approved

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Frequently Asked Questions
What is the difference between Alamethicin and Theta-Defensin?
Alamethicin: Alamethicin is a 20-residue peptaibol (peptide with a high proportion of alpha-aminoisobutyric acid, Aib) from the fungus Trichoderma viride. It is the prototypical voltage-gated peptide ion channel, ... Theta-Defensin: Theta-defensins are the only known cyclic peptides produced in the animal kingdom. Found in rhesus macaques and other Old World primates, they are formed by ligation of two 9-residue alpha-defensin ge...
Which has a longer half-life, Alamethicin or Theta-Defensin?
Alamethicin half-life: Membrane-stable. Theta-Defensin half-life: Extended (cyclic stability).
Can you stack Alamethicin and Theta-Defensin?
Alamethicin and Theta-Defensin 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.