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Two-component protein adsorption to the cation exchanger S Sepharose FF
1Department of Chemical Engineering, University of Cambridge, U.K.
Journal of Chromatography
|May 4, 1990
Summary
Investigating multicomponent protein adsorption to ion exchangers revealed competitive interactions. While a competitive model better predicted packed-bed experiments, factors like molecular size and protein interactions necessitate further model refinement.
Area of Science:
- Biochemistry
- Chemical Engineering
- Separation Science
Background:
- Ion exchange chromatography is crucial for protein purification.
- Understanding multicomponent protein adsorption is vital for optimizing separation processes.
- Existing models often simplify competitive interactions between proteins.
Purpose of the Study:
- To investigate multicomponent protein adsorption onto ion exchangers.
- To compare experimental data with competitive and non-competitive adsorption models.
- To identify factors influencing the accuracy of adsorption models.
Main Methods:
- Utilized a model system with bovine serum albumin and lysozyme on S Sepharose FF.
- Performed packed-bed experiments to determine breakthrough curves and adsorbed protein profiles.
- Compared experimental results against two theoretical models: non-competitive and fully competitive adsorption.
Main Results:
- Experimental evidence supported competitive adsorption between proteins.
- The fully competitive model provided a closer prediction for packed-bed experiments.
- Discrepancies indicate limitations of the competitive model alone.
Conclusions:
- Multicomponent protein adsorption to ion exchangers is competitive.
- Molecular size and inter-protein interactions influence adsorption behavior.
- Developing a general model for multicomponent protein adsorption requires incorporating these additional factors.