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Magnetic aqueous two-phase separation in preparative applications.
S Flygare1, P Wikström, G Johansson
1Department of Pure and Applied Biochemistry, University of Lund, Sweden.
Enzyme and Microbial Technology
|February 1, 1990
Summary
Magnetic separation rapidly speeds up aqueous two-phase systems, reducing separation time by up to 240,000 times. This technique effectively extracts enzymes without adverse effects, even in complex biological mixtures.
Area of Science:
- Biochemistry
- Separation Science
- Biotechnology
Background:
- Aqueous two-phase systems (ATPS) are used for separating biological molecules.
- Traditional ATPS separation can be slow and inefficient, especially with viscous or protein-rich phases.
Purpose of the Study:
- To introduce and evaluate magnetic aqueous two-phase separation as a method to accelerate phase separation.
- To develop and test apparatus for preparative and continuous magnetic separation.
Main Methods:
- Addition of magnetically susceptible materials (iron oxide particles) to ATPS.
- Application of a magnetic field to induce rapid phase separation.
- Construction and testing of preparative and continuous magnetic separation apparatus.
Main Results:
- Phase separation time decreased by factors ranging from 5 to 240,000.
- Magnetic separation was effective for high-protein and viscous systems.
- Extracted glycolytic enzymes showed no adverse effects from iron oxide particles.
- Continuous separation apparatus processed crude dextran and cell homogenate effectively.
Conclusions:
- Magnetic aqueous two-phase separation significantly enhances separation efficiency and speed.
- The technique is robust and applicable to complex biological mixtures and large-scale processing.
- Iron oxide particles do not negatively impact the integrity or function of extracted biomolecules.