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On-line low-volume transesterification-based assay for immobilized lipases
Pawel L Urban1, David M Goodall, Edmund T Bergström
1Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
Journal of Biotechnology
|June 24, 2006
Summary
This study introduces a rapid method for assessing immobilized lipase transesterification activity using microreactor technology. The system efficiently quantifies enzymatic reactions in continuous flow, enabling solvent compatibility studies and product distribution analysis.
Area of Science:
- Biocatalysis
- Enzyme immobilization
- Analytical chemistry
Background:
- Lipase-catalyzed transesterification is crucial for various industrial applications.
- Efficient methods are needed to evaluate immobilized enzyme activity.
- Microfluidic systems offer potential for high-throughput enzymatic assays.
Purpose of the Study:
- To develop a fast assay for evaluating transesterification activity of immobilized lipases.
- To compare enzyme performance in different solvent systems.
- To visualize product distribution within a microreactor.
Main Methods:
- A microreactor system using capillary tubing and UV detection was employed.
- Immobilized microbial lipases were packed into a Teflon tube microreactor.
- Continuous-flow and stopped-flow modes were utilized for analysis.
- Acetaldehyde product was quantified via UV absorbance at 280 nm.
Main Results:
- The method allows rapid evaluation of transesterification activity with microlitre volumes.
- Acetonitrile was identified as a compatible solvent enhancing lipase activity.
- Product distribution was visualized using CMOS imaging in stopped-flow mode.
Conclusions:
- The developed microreactor system provides a rapid and efficient platform for lipase activity assessment.
- This method facilitates solvent screening and optimization for enzymatic reactions.
- The visualization technique aids in understanding enzyme performance and reaction dynamics.