Abstract
Porcine liver esterase, which cleaves ofloxacin butyl ester enantioselectively to levofloxacin, was successfully immobilized in calcium alginate and polyacrylamide gel. Immobilized esterase in 5% (w/v) calcium alginate exhibited 58% immobilization efficiency and could be reused five times without severe loss of enzyme activity. On the other hand, entrapped esterase in polyacrylamide gel, composed of 20% of total monomer and 8.3% of cross-linking agent, could be reused 10 times, and 51% of enzyme activity remained after the 10th batch without decrease of enantioselectivity. Compared with entrapped methods, significant reduction of enzyme activity was found in the case of physical adsorption on to QAE-Sephadex.
Original language | English |
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Pages (from-to) | 1033-1037 |
Number of pages | 5 |
Journal | Biotechnology Letters |
Volume | 23 |
Issue number | 13 |
DOIs | |
State | Published - 2001 |
Bibliographical note
Funding Information:This work was supported by the Center of Advanced Bioseparation Technology, Inha University. The support is deeply appreciated.
Keywords
- Immobilized enzyme
- Levofloxacin
- Ofloxacin
- Porcine liver esterase