Chip-Capillary Hybrid Device for Automated Transfer of Sample Preseparated by Capillary Isoelectric Focusing to Parallel Capillary Gel Electrophoresis for Two-Dimensional Protein Separation

In this article, we introduce a chip-capillary hybrid device to integrate capillary isoelectric focusing (CIEF) with parallel capillary sodium dodecyl sulfate- polyacrylamide gel electrophoresis (SDS-PAGE) or capillary gel electrophoresis (CGE) toward automating two-dimensional (2D) protein separati...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 2012-08, Vol.84 (16), p.7001-7007
Main Authors: Lu, Joann J, Wang, Shili, Li, Guanbin, Wang, Wei, Pu, Qiaosheng, Liu, Shaorong
Format: Article
Language:English
Subjects:
Analytical chemistry
Animals
Automation
Cattle
Chemical compounds
Chemical reactions
Chemistry
Chromatographic methods and physical methods associated with chromatography
Electrophoresis, Microchip - instrumentation
Electrophoresis, Polyacrylamide Gel - instrumentation
Exact sciences and technology
Isoelectric Focusing - instrumentation
Other chromatographic methods
Proteins
Proteins - isolation & purification
Protocol
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Summary:In this article, we introduce a chip-capillary hybrid device to integrate capillary isoelectric focusing (CIEF) with parallel capillary sodium dodecyl sulfate- polyacrylamide gel electrophoresis (SDS-PAGE) or capillary gel electrophoresis (CGE) toward automating two-dimensional (2D) protein separations. The hybrid device consists of three chips that are butted together. The middle chip can be moved between two positions to reroute the fluidic paths, which enables the performance of CIEF and injection of proteins partially resolved by CIEF to CGE capillaries for parallel CGE separations in a continuous and automated fashion. Capillaries are attached to the other two chips to facilitate CIEF and CGE separations and to extend the effective lengths of CGE columns. Specifically, we illustrate the working principle of the hybrid device, develop protocols for producing and preparing the hybrid device, and demonstrate the feasibility of using this hybrid device for automated injection of CIEF-separated sample to parallel CGE for 2D protein separations. Potentials and problems associated with the hybrid device are also discussed.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac3017168