Comprehensive protein profiling by multiplexed capillary zone electrophoresis using cross-linked polyacrylamide...

Area of Science:

• Analytical Chemistry
• Biochemistry
• Separation Science

Background:

• Protein-wall interactions hinder efficient separation in capillary electrophoresis.
• Existing methods struggle with comprehensive analysis of proteins with varying charges.

Purpose of the Study:

• To develop and demonstrate cross-linked polyacrylamide (CPA) coated capillaries for protein separation.
• To achieve high-efficiency and high-throughput protein analysis using capillary zone electrophoresis (CZE).
• To enable comprehensive analysis of both positively and negatively charged proteins.

Main Methods:

• Development of cross-linked polyacrylamide (CPA) coatings on capillary walls.
• Application of CPA-coated capillaries in capillary zone electrophoresis (CZE).
• Implementation of a "one-sample-two-separation" strategy for comprehensive analysis.
• Utilizing a multiplexed CZE system for high throughput.

Main Results:

• CPA coatings effectively suppress protein-wall interactions.
• Achieved high separation efficiency exceeding 2 x 10^6 plates per meter.
• Demonstrated comprehensive analysis of both positive and negative proteins via the developed approach.
• High throughput achieved using a multiplexed CZE system.

Conclusions:

• CPA-coated capillaries offer a robust platform for high-efficiency protein separations via CZE.
• The "one-sample-two-separation" method successfully addresses the challenge of analyzing proteins with different charges.
• The developed system provides a high-throughput solution for comprehensive protein analysis.