Compound

L-Phe-L-Arg

A peptide cation obtained by deprotonation of the carboxy terminus and protonation of the side-chain guanidino group and the amino terminus of Phe-Arg; major species at pH 7.3.

Definition from ChEBI (CHEBI:133147), read 2026-09-23. CC BY 4.0.

CHEBI:133147ChEBI

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Structure

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A generated conformer of L-Phe-L-Arg — one low-energy arrangement PubChem computed, not a measured structure. Hydrogens are not drawn; the formula counts them.

Class: Organic compound, cation
Formula: C15H24N5O3
Mass: 322.389 g/mol
Charge: +1
InChIKey: OZILORBBPKKGRI-RYUDHWBXSA-O
SMILES: NC(=[NH2+])NCCC[C@H](NC(=O)[C@@H]([NH3+])Cc1ccccc1)C(=O)[O-]
Look it up: ChEBI PubChem By InChIKey

Identity from ChEBI, geometry from PubChem. Not evidence.

Reactions

1 reaction

bradykinin+waterL-Phe-L-Arg+bradykinin(1-7)
Catalysed by ACE
Reaction pageLeft to rightBalanced
Rhea RHEA:71451CC BY 4.0Reference data

Other names

6 names

Resolves to: L-Phe-L-Arg

Also called: FR(1+)L-Phe-L-Arg(1+)L-phenylalanyl-L-arginine(1+)phenylalanylargininephenylalanylarginine(1+)
Systematic name: (2S)-5-{[azaniumyl(imino)methyl]amino}-2-{[(2S)-2-azaniumyl-3-phenylpropanoyl]amino}pentanoate