Journal
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Volume 78, Issue 1, Pages 56-63Publisher
WILEY
DOI: 10.1002/jctb.742
Keywords
lyophilisation; lignin peroxidase enzyme; lyoprotectants; storage; shelf stability
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The effect of different lyoprotectants (sucrose, dimethyl-succinate buffer (DMS), bovine serum albumin (BSA), mannitol and dextran, mw 60kDa) on the stability of the enzyme lignin peroxidase (LiP, EC number: 1.11.1.-), both during the freeze-drying process and storage were investigated. The shelf stability tests were performed at 4degreesC and 27degreesC. Both DMS buffer and sucrose showed a good protective action: the former was particularly effective during the process, while the latter improved the stability during storage. In contrast, mannitol and dextran had negative effects, reducing the activity also in the lignin peroxidase solution. BSA was discarded because, in the range of compatible concentrations with LiP, it does not confer a consistent structure to the freeze-dried product. (C) 2002 Society of Chemical Industry.
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