Capillary electrophoresis-based separation techniques for the analysis of proteins

Area of Science:

• Biochemistry
• Analytical Chemistry
• Proteomics

Background:

• Capillary electrophoresis (CE) provides high speed and efficiency for protein analysis, requiring minimal sample and buffer volumes.
• Recent advancements focus on coupling CE with various detection systems like absorption, laser-induced fluorescence (LIF), and mass spectrometry (MS).

Purpose of the Study:

• To review CE-based techniques for protein analysis, primarily focusing on developments within the last five years.
• To discuss the principles, advantages, and disadvantages of different CE techniques for protein quantification and profiling.

Main Methods:

• Summary of CE techniques coupled with absorption, LIF, and MS detection.
• Emphasis on advanced CE methods such as on-column concentration and multidimensional separation for high-throughput profiling.
• Analysis of protein analysis within the past five years.

Main Results:

• Developed CE techniques offer enhanced peak capacity for analyzing complex biological samples and single cells.
• Limitations include poor reproducibility, low sample loading capacity, and inefficient interfaces for multidimensional separations and MS coupling.
• Current CE methods are not yet practical tools for large-scale proteomics.

Conclusions:

• Further development is needed to improve analytical sensitivity, throughput, and dynamic ranges for comprehensive proteome analysis.
• Addressing limitations in reproducibility and interface efficiency is crucial for advancing CE in proteomics.
• Novel CE techniques are still in demand to fully capture proteome complexities and dynamics.