Home-made capillary array electrophoresis for high-throughput amino acid analysis

Area of Science:

• Analytical Chemistry
• Biochemistry
• Separation Science

Background:

• High-throughput analysis of amino acids (AAs) is crucial for various biological and chemical applications.
• Existing methods for AA analysis may lack the speed and resolution required for complex sample matrices.
• Carboxytetramethylrhodamine succinimidyl ester (TAMRA) labeling offers a fluorescent tag for sensitive detection of AAs.

Purpose of the Study:

• To develop and evaluate a capillary array electrophoresis (CAE) system with a confocal rotary scanner for high-throughput TAMRA-labeled AA analysis.
• To demonstrate the capability of the CAE system for enantiomeric separation of specific AAs.
• To showcase the system's versatility by applying micellar electrokinetic chromatography (MEKC) for AA separation.

Main Methods:

• Development of a capillary array electrophoresis (CAE) setup incorporating a confocal rotary scanner.
• Utilized carboxytetramethylrhodamine succinimidyl ester (TAMRA) for fluorescent labeling of amino acids (AAs).
• Applied capillary zone electrophoresis (CZE) with cyclodextrin-modified electrolytes for enantiomeric separation.
• Employed micellar electrokinetic chromatography (MEKC) for separation of multiple AAs.

Main Results:

• The CAE system enabled parallel detection of up to 128 capillaries, facilitating high-throughput analysis.
• Successfully achieved enantiomeric separation of isoleucine, cysteine, and glutamic acid for the first time using this CAE setup.
• Demonstrated baseline separation of seven AAs utilizing the MEKC method.

Conclusions:

• The developed CAE system provides a robust and efficient platform for high-throughput TAMRA-labeled AA analysis.
• The system's capability in enantiomeric separation and MEKC applications highlights its potential for complex chiral and mixture analyses.
• This technology advances the field of amino acid analysis, offering improved speed and resolution.