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Received December 31, 2007
Accepted February 27, 2008
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Determination of meaty peptide in enzymatic hydrolyzate of beef protein by HPLC-MS

1College of Food Engineering & Biotechnology, Tianjin Key Laboratory of Food Nutrition & Safety, Tianjin University of Science & Technology, Tianjin 300457, China 2Yingdong College of Bioengineering, Shaoguan University, Shaoguan 512005, China 3Tianjin Chunfa Food Ingredient Limited Company, Tianjin, 300300, China
Korean Journal of Chemical Engineering, September 2008, 25(5), 1120-1124(5), 10.1007/s11814-008-0183-2
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Abstract

The purpose of this study is to detect beefy meaty peptide (BMP) in beef hydrolyzate. The synthesized BMP is used as a standard sample in the study. High performance liquid chromatography (HPLC)/ion trap electrospray ionization mass spectrometry (ESI-MS) with UV detection was applied in qualitative analysis of the peptides. Six beef protein enzymatic hydrolyzate samples were separated on a Surveyor HPLC system through a SUPELCO Discovery® C18 analytical column (5 μm, 15 cm×2.1 mm i.d.). The column was eluted at a flow rate of 0.2 mL/min in a linear gradient elution mode of acetronitrile-water solution with 0.1% trifluoroacetic acid. The concentration of acetronitrile was increased from 5% to 50% in 40 minutes. A Finnigan LCQ Advantage MAX instrument was used as detector to analyze with ESI-MS and ESI-MS/MS in positive mode. Among the six samples of beef protein enzymatic hydrolysate, the BMP is detected and confirmed in sample No.4 with a higher intensity of characteristic peak and is further investigated by ESI-MS/MS. As a result, BMP exists in sample No.4. The study proves that HPLC-ESI-MS/MS is a simple, rapid, sensitive method to analyze target peptides from complex polypeptides.

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