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):
CYFQNCPRG
Residues plotted ~100° apart around an α-helix — clustering of one color reveals an amphipathic face.
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).