Side-by-Side Comparison · 2026

Angiotensin 1-9 vs Apelin-36

Angiotensin 1-9 vs Apelin-36 — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Angiotensin 1-9
Cardiovascular Peptide

Angiotensin 1-9 (Ang 1-9) is a 9-amino acid peptide formed when ACE2 cleaves the C-terminal leucine from angiotensin I (Ang I, 10 AA). Discovered as part of the counter-regulatory renin-angiotensin system (RAS), Ang 1-9 opposes the hypertensive and tissue-damaging actions of angi...

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Apelin-36
Cardiovascular Peptide

Apelin-36 is the full-length 36-amino acid form of the apelin peptide family, encoded by the APLN gene. It activates the APJ (APLNR) receptor, a Gi-coupled GPCR, producing cardiovascular effects including vasodilation, positive inotropy, and cardioprotection. The largest naturall...

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Key Parameters
Parameter Angiotensin 1-9 Apelin-36
Category Cardiovascular Peptide Cardiovascular Peptide
Research Preclinical Research Preclinical / Phase 2
Half-Life ~20-30 minutes 2-5 minutes (IV)
Typical Dose 40-400 ng/kg/min IV infusion (animal) 1-10 nmol/kg IV (research)
Frequency Acute infusion protocols Variable
Route IV/SC (research) IV / SC (research)
FDA Status Research compound Not approved

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Frequently Asked Questions
What is the difference between Angiotensin 1-9 and Apelin-36?
Angiotensin 1-9: Angiotensin 1-9 (Ang 1-9) is a 9-amino acid peptide formed when ACE2 cleaves the C-terminal leucine from angiotensin I (Ang I, 10 AA). Discovered as part of the counter-regulatory renin-angiotensin sy... Apelin-36: Apelin-36 is the full-length 36-amino acid form of the apelin peptide family, encoded by the APLN gene. It activates the APJ (APLNR) receptor, a Gi-coupled GPCR, producing cardiovascular effects inclu...
Which has a longer half-life, Angiotensin 1-9 or Apelin-36?
Angiotensin 1-9 half-life: ~20-30 minutes. Apelin-36 half-life: 2-5 minutes (IV).
Can you stack Angiotensin 1-9 and Apelin-36?
Angiotensin 1-9 and Apelin-36 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.