Compound monograph
Bradykinin
Bradykinin is a linear nonapeptide composed of standard amino-acid residues, with free N and C termini.
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Identity & nomenclature
Bradykinin is a linear nonapeptide composed of standard amino-acid residues, with free N and C termini.
This record describes the covalent parent without counterion or hydration components.
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Molecular properties
| Molecular formula | C50H73N15O11 |
|---|---|
| Molecular mass | 1060.228 Da |
| CAS Registry Number | 58-82-2 |
| PubChem CID | 439201 |
| UNII | S8TIM42R2W |
| One-letter sequence | RPPGFSPFR |
| Three-letter sequence | Arg–Pro–Pro–Gly–Phe–Ser–Pro–Phe–Arg |
| Terminal groups | Free N-terminus; Free C-terminal carboxyl |
Positions count the mature chain from 1. All chiral amino-acid residues are L; glycine is achiral. Terminal groups are recorded separately.
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Structural characteristics
The chain contains standard L-amino-acid residues and no inter-residue covalent closure.
Terminal features: Free N-terminus, Free C-terminal carboxyl.
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Molecular targets & mechanisms
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Analytical considerations
The molecular formula describes the parent; the average mass is calculated using CIAAW 2024 abridged atomic weights. PubChem displays 1060.2 Da at one-decimal precision. FDA GSRS estimates 1060.0 Da under an unestablished mass convention; that figure is non-defining. A patent intermediate heading and an earlier octapeptide assignment do not redefine the admitted final nonapeptide.
What the studies reported
No verified findings are published for this record under Content Policy v1.
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Verified bibliography
Cited studies by type
The one paper this record cites, counted by the kind of work each reports. A count is the size of this record's selection, not of the research that exists, and says nothing about results, safety, effectiveness or approval.
A paper can report more than one kind of work. Each count opens those papers in the bibliography. Compare every record on the Evidence Map.
Reference 1
Synthesis of 4-L-leucine-6-O-acetyl-L-serine, 4-L-leucine, 6-O-acetyl-L-serine bradykinin, and bradykinin.Suzuki K, Abiko T, Asaka M
Chemical & pharmaceutical bulletin · 1966-03 · Journal Article
current
Study models of these references
What kind of experiment each cited paper reports, taken from its abstract unless marked. Not a summary of results.
| Reference | Study models |
|---|---|
| Suzuki K et al. 1966 | Chemical, structural or analytical study; no biological model reported |
Record history
Published 2026-10-21.
- : Analytical notes
Each entry names the parts of this record that changed on that date. Changes to links between records and to catalogue links are not listed. This history covers the tracked record fields; study findings are not listed here.
Cite this record: Purely Peptides Research Library. Bradykinin. Published 2026-10-21; updated 2026-10-21. https://purelypeptides.org/research/compounds/bradykinin/
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Methodology & citation verification
Reference identity is checked against official PubMed metadata. Local deterministic receipts bind each normalized title and canonical metadata record to its verification date. Scientific values remain absent when an authoritative source has not been verified.
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