Capillary Electrophoresis-Mass Spectrometry for Peptide Analysis: Target-Based Approaches and Proteomics/Peptidomics Strategies
In this chapter, the potential of capillary electrophoresis-mass spectrometry (CE-MS) for peptide analysis is demonstrated by the presentation of two different strategies typically followed in analysis of these biomolecules by CE-MS. The first one is a target-based approach and it is used to detect a toxic oligopeptide in a complex matrix. Namely, CE-MS using an ion trap MS analyzer is applied to detect and quantify γ-glutamyl-S-ethenyl-cysteine (GEC) bioactive dipeptide in a legume plant. The second one is a shotgun-like methodology used for proteomic analysis. Particularly, CE-MS using a time-of-flight MS analyzer is employed to investigate the substantial equivalence between a genetically modified (GM) variety of soybean and its conventional isogenic counterpart. These generic methods have broad applications for the analysis of peptides in a large variety of matrices, including applications in the area of proteomics and peptidomics.
Key wordsPeptides Foodomics Peptidomics Proteomics Target analysis CE CE-MS
This work was supported by AGL2008-05108-C03-01 (Ministerio de Educacion y Ciencia, Spain) and CSD2007-00063 FUN-C-FOOD projects (Programa CONSOLIDER, Ministerio de Educacion y Ciencia, Spain); by the Czech Science Foundation, grant no. 203/08/1428; and by the Academy of Sciences of the Czech Republic (ASCR), Research Project AV0Z40550506. Authors also thank 2008CZ0019 bilateral project (ASCR-CSIC) for the support.
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