Side-by-Side Comparison · 2026

Buforin II vs Polyphemusin

Buforin II vs Polyphemusin — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Buforin II
Antimicrobial Peptide

Buforin II is a 21-residue antimicrobial peptide derived from histone H2A in the stomach of the Asian toad Bufo gargarizans. Unlike most AMPs that kill bacteria by membrane disruption, Buforin II translocates across bacterial membranes without causing lysis and kills by binding n...

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Polyphemusin
Antimicrobial Peptide

Polyphemusin I is an antimicrobial peptide from the hemocytes of the American horseshoe crab (Limulus polyphemus). Structurally similar to tachyplesin from the Japanese horseshoe crab, it adopts a disulfide-bridged beta-hairpin with potent antimicrobial activity....

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Key Parameters
Parameter Buforin II Polyphemusin
Category Antimicrobial Peptide Antimicrobial Peptide
Research Preclinical Preclinical
Half-Life Minutes (proteolytic) Hours (disulfide stabilized)
Typical Dose N/A N/A
Frequency N/A N/A
Route Research only Research only
FDA Status Not approved Not approved

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Frequently Asked Questions
What is the difference between Buforin II and Polyphemusin?
Buforin II: Buforin II is a 21-residue antimicrobial peptide derived from histone H2A in the stomach of the Asian toad Bufo gargarizans. Unlike most AMPs that kill bacteria by membrane disruption, Buforin II tran... Polyphemusin: Polyphemusin I is an antimicrobial peptide from the hemocytes of the American horseshoe crab (Limulus polyphemus). Structurally similar to tachyplesin from the Japanese horseshoe crab, it adopts a dis...
Which has a longer half-life, Buforin II or Polyphemusin?
Buforin II half-life: Minutes (proteolytic). Polyphemusin half-life: Hours (disulfide stabilized).
Can you stack Buforin II and Polyphemusin?
Buforin II and Polyphemusin 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.