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Updated: Jul 5, 2026
11:09
Online Size-exclusion and Ion-exchange Chromatography on a SAXS Beamline
Published on: January 5, 2017
Size-exclusion chromatography with on-line light scattering.
Current Protocols in Protein Science
|April 23, 2008
Summary
This study details using size-exclusion chromatography with light scattering, UV, and refractive index detectors (SEC-LS/UV/RI) to measure molecular weights. The method accurately determines the size and composition of proteins, glycoproteins, and their complexes.
Area of Science:
- Biochemistry
- Analytical Chemistry
Background:
- Accurate determination of molecular weight is crucial for characterizing proteins and their interactions.
- Size-exclusion chromatography (SEC) is a common technique for separating molecules by size.
Purpose of the Study:
- To describe the application of SEC coupled with multi-detector systems for precise molecular weight determination.
- To outline the methodology for analyzing simple proteins, glycoproteins, and complex assemblies.
Main Methods:
- Utilizing size-exclusion chromatography (SEC) integrated with on-line light scattering (LS), UV absorbance, and refractive index (RI) detectors.
- Employing multiangle light scattering (MALS) for enhanced molecular weight and structural analysis.
Main Results:
- The SEC-LS/UV/RI method enables accurate molecular weight determination for various biomolecules.
- The technique is effective for characterizing individual proteins, glycoproteins, and complex stoichiometry.
Conclusions:
- SEC-LS/UV/RI provides a robust platform for comprehensive molecular weight and complex analysis.
- This analytical approach is vital for understanding protein structure, function, and interactions.
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