Journal
ELECTROPHORESIS
Volume 28, Issue 10, Pages 1607-1614Publisher
WILEY
DOI: 10.1002/elps.200600656
Keywords
2-DE; in-gel digestion; MALDI-TOF MS; protein staining; proteomics
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The availability of easy-to-handle, sensitive, and cost-effective protein staining protocols for 2-DE, in conjunction with a high compatibility for subsequent MS analysis, is still a prerequisite for successful proteome research. in this article we describe a quick and easy-touse methodological protocol based on sensitive, homogeneous, and MS-compatible silver nitrate protein staining, in combination with an in-gel digestion, employing the Millipore 96-well ZipPlate system for peptide preparation. The improved quality and MS compatibility of the generated protein digests, as compared to the otherwise weakly MS-compatible silver nitrate staining, were evaluated on real tissue samples by analyzing 192 Coomassie-stained protein spots against their counterparts from a silver-stained 2-DE gel. Furthermore, the applicability of the experimental setup was evaluated and demonstrated by the analysis of a large-scale MALDI-TOF MS experiment, in which we analyzed an additional similar to 1000 protein spots from 2-DE gels from mouse liver and mouse brain tissue.
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