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Mammalian Cell Encapsulation in Alginate Beads Using a Simple Stirred Vessel
Published on: June 29, 2017
Alginate beads encapsulation matrix for urease and polyethyleneglycol-urease
1Ege University, Bornova, Izmir, Turkey. senay.baysal@ege.ede.tr
Summary
Immobilized urease and PEG-urease within alginate beads showed improved stability and activity. PEG-urease beads demonstrated enhanced performance and reusability at pH 6.0, indicating potential for biocatalytic applications.
Area of Science:
- Biochemistry
- Biomaterials Engineering
Background:
- Enzyme immobilization is crucial for enhancing biocatalyst stability and reusability.
- Polyethylene glycol (PEG) modification can improve enzyme properties, but its effect within immobilized systems requires further investigation.
Purpose of the Study:
- To immobilize urease and PEG-modified urease within alginate beads.
- To characterize and compare the stability and activity of encapsulated urease and PEG-urease with free enzyme.
- To evaluate the performance of immobilized enzymes for potential biocatalytic applications.
Main Methods:
- Urease and PEG-modified urease were encapsulated in alginate beads.
- Characterization of encapsulated enzymes included pH, temperature, and stability assessments.
- Enzyme activity yield, bead diameter, and reusability were determined.
Main Results:
- Encapsulation yielded 34% mass and 19.3% activity for urease, and 57% mass and 43% activity for PEG-urease.
- PEG-urease beads (1.8 mm) were smaller than urease beads (2.5 mm).
- PEG-urease beads exhibited higher stability at pH 6.0 and retained 70% activity after seven reuses.
Conclusions:
- Alginate encapsulation effectively immobilized both urease and PEG-urease.
- PEG modification significantly enhanced the stability and reusability of encapsulated urease.
- PEG-urease alginate beads show promise for efficient and stable biocatalysis.
