Side-by-Side Comparison · 2026

Bactenecin vs Polyphemusin

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

Bactenecin
Antimicrobial Peptide

Bactenecins are a diverse family of antimicrobial peptides from bovine neutrophil granules. The family includes both the small cyclic dodecapeptide Bac1 (with one disulfide bond) and the larger linear proline-rich Bac5 and Bac7....

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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 Bactenecin 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 Bactenecin and Polyphemusin?
Bactenecin: Bactenecins are a diverse family of antimicrobial peptides from bovine neutrophil granules. The family includes both the small cyclic dodecapeptide Bac1 (with one disulfide bond) and the larger linear... 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, Bactenecin or Polyphemusin?
Bactenecin half-life: Minutes (proteolytic). Polyphemusin half-life: Hours (disulfide stabilized).
Can you stack Bactenecin and Polyphemusin?
Bactenecin 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.