Tyr-Pro-Lys, an angiotensin I-converting enzyme inhibitory peptide derived from broccoli (Brassica oleracea Italica)

Published on Jan 1, 2006in Food Chemistry7.514
· DOI :10.1016/J.FOODCHEM.2005.06.050
Ju-Eun Lee1
Estimated H-index: 1
(Hanyang University),
In Young Bae25
Estimated H-index: 25
(Hanyang University)
+ 1 AuthorsCha Bum Yang1
Estimated H-index: 1
(Hanyang University)
Abstract To investigate the naturally occurring angiotensin I-converting enzyme (ACE) inhibitor, broccoli ( Brassica oleracea Italica ) extracts were used for its isolation and identification. After treatment with 50% acetone for membrane breakdown, ethyl acetate, n -butanol, and water were used for the preparation of broccoli extracts. The water-soluble extract from broccoli had 76.9% ACE inhibitory activity, while those of other organic solvent extracts showed lower ACE inhibitory activities. An ACE inhibitory peptide was isolated using column chromatographic methods including: Amberlite XAD-4, Sephadex LH-20, and high performance liquid chromatography. The purified ACE inhibitory peptide was identified to be a tripeptide, Tyr-Pro-Lys, having an IC 50 value of 10.5 μg protein/ml.
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