Rapid Analysis of Tryptically Digested Cerebrospinal Fluid Using Capillary Electrophoresis−Electrospray Ionization−Fourier Transform Ion Cyclotron Resonance−Mass Spectrometry

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Abstract

Mass spectrometry has in recent years been established as the method of choice for protein identification and characterization in proteomics. Capillary electrophoresis (CE) is a fast and efficient method for the separation of peptides and proteins. The on-line combination of CE with Fourier transform ion cyclotron resonance (FTICR) mass spectrometry (MS) has been shown to be a powerful tool in the analysis of complex mixtures of proteins. This paper presents the first results from a proteomic analysis of human cerebrospinal fluid proteins by tryptic digestion and CE-FTICR-MS, where 30 proteins could be identified on a 95% confidence level with mass measurement errors less than 5 ppm.

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