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Vasopressin

Vasopressin (antidiuretic hormone) is a nine-residue peptide closely related to oxytocin, central to water balance physiology.

By The Peptides Codex Editorial TeamReviewed July 10, 2026
Length
9 aa
Class
Hormone
Function
Water retention, vasoconstriction
Context
Diabetes insipidus and related clinical uses

Sister nonapeptide to oxytocin; differs by two residues.

Also known as: ADH · arginine vasopressin

Part of the Foundational & therapeutic peptides cluster

Overview

Vasopressin (antidiuretic hormone) is a nine-residue peptide closely related to oxytocin, central to water balance physiology.

Source & context

Biological / chemical source: Hypothalamus

Primary research or clinical context: Diabetes insipidus and related clinical uses

Comparison with oxytocin

Two residue differences dramatically shift receptor preference and physiology — a textbook example of sequence–function relationships in peptides.

Sequence

One-letter sequence commonly cited for Vasopressin (educational; isoforms and modifications may differ):

FAQ about Vasopressin

What is Vasopressin?+

Vasopressin (antidiuretic hormone) is a nine-residue peptide closely related to oxytocin, central to water balance physiology.

Is Vasopressin an approved medicine?+

Vasopressin is discussed here as a research / educational topic. Diabetes insipidus and related clinical uses. This is not medical advice.

What is the typical length of Vasopressin?+

Vasopressin is commonly described as approximately 9 amino acids (Hormone).

Related peptides

References & further reading

  1. 1.Wikipedia — Vasopressin
  2. 2.PubChem — compound summary for Argipressin / Arginine vasopressin (CID 644077)
Disclaimer: Educational content only. Not medical advice. Not instructions for human use. Research peptides and unapproved products may be restricted or illegal to market for human consumption in your jurisdiction. Consult qualified professionals and applicable law.
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Cite this: Peptides Codex — Vasopressin educational profile.
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