What Are the Differences Between AKTA Fast Protein Liquid Chromatography and HPLC in Protein Purification?
Both AKTA and HPLC are chromatographic techniques commonly used for the purification of proteins and other biomacromolecules. However, they differ significantly in terms of design, applications, and operational characteristics:
Primary Applications
1. AKTA
The AKTA system, developed by GE Healthcare (now Cytiva), is specifically designed for the purification of biomolecules, particularly proteins. It is widely used in affinity chromatography, ion-exchange chromatography, and size-exclusion chromatography.
2. HPLC
High-performance liquid chromatography (HPLC) is designed for the separation, identification, and quantification of various types of molecules, including small molecules, peptides, nucleic acids, and proteins.
Operating Pressure
1. AKTA
Operates at relatively low pressures, typically below 500 psi.
2. HPLC
Can function at pressures up to several thousand psi, particularly in ultra-high-performance liquid chromatography (UHPLC).
Column Characteristics
1. AKTA
Uses columns with larger-diameter particles and larger pore sizes, which are well-suited for biomacromolecule separation.
2. HPLC
Employs columns packed with smaller-diameter particles and smaller pores, enhancing resolution but requiring higher operational pressure.
Detection Systems
1. AKTA
Typically equipped with UV detectors and, in some cases, conductivity or other specialized detectors.
2. HPLC
Supports a variety of detectors, including UV, fluorescence, refractive index, and mass spectrometry.
Automation and User-Friendliness
1. AKTA
Offers a high degree of automation and user-friendly operation, making it particularly advantageous for large-scale protein purification.
2. HPLC
While automation is available, it often requires more manual intervention, especially for complex sample separations.
Sample Volume Handling
1. AKTA
Typically used for biological samples in the microgram-to-gram range.
2. HPLC
Depending on the system and column size, it can process sample volumes from nanograms to milligrams or larger.
Resolution and Separation Efficiency
1. AKTA
Provides sufficient resolution for biomacromolecule separation.
2. HPLC
Due to its use of smaller-particle columns, it generally achieves higher resolution and better separation efficiency.
While both AKTA and HPLC are effective for protein purification, they serve different purposes based on experimental needs. The AKTA system is advantageous for large-scale, automated protein purification but requires a significant investment and technical expertise. HPLC, on the other hand, is widely used for high-resolution separations across a broad range of sample types but typically involves longer separation times and greater manual involvement. The choice between these methods should be based on experimental objectives, required purity levels, sample throughput, and available laboratory resources.
MtoZ Biolabs, an integrated chromatography and mass spectrometry (MS) services provider.
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