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Selective precipitation and recovery of xylanase using surfactant and organic solvent

Selective precipitation and recovery of xylanase using surfactant and organic solvent The selective precipitation of xylanase from an aqueous phase containing mixtures of xylanase and cellulase was studied using an ionic surfactant as precipitating ligand and a polar organic solvent as recovery solvent. Of four ionic surfactants tested, sodium di‐(2‐ethylhexyl) sulfosuccinate (AOT) showed a complete removal of xylanase at pH 4.5. The recovery of xylanase from the xylanase‐AOT complex was a strong function of the type and the volume of the polar solvent and of the concentration of sodium acetate buffer in the final aqueous solution used to solubilize the recovered xylanase. With ethanol as a recovery solvent, a recovery of xylanase activity of 78 ± 10% was obtained. The cellulase activity in the recovered xylanase was below the detection limit. The results demonstrate that an ionic surfactant can recover enzymes from aqueous solutions without loss in their activity. © 2004 Wiley Periodicals, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biotechnology and Bioengineering Wiley

Selective precipitation and recovery of xylanase using surfactant and organic solvent

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References (37)

Publisher
Wiley
Copyright
Copyright © 2004 Wiley Periodicals, Inc., A Wiley Company
ISSN
0006-3592
eISSN
1097-0290
DOI
10.1002/bit.20080
pmid
15137082
Publisher site
See Article on Publisher Site

Abstract

The selective precipitation of xylanase from an aqueous phase containing mixtures of xylanase and cellulase was studied using an ionic surfactant as precipitating ligand and a polar organic solvent as recovery solvent. Of four ionic surfactants tested, sodium di‐(2‐ethylhexyl) sulfosuccinate (AOT) showed a complete removal of xylanase at pH 4.5. The recovery of xylanase from the xylanase‐AOT complex was a strong function of the type and the volume of the polar solvent and of the concentration of sodium acetate buffer in the final aqueous solution used to solubilize the recovered xylanase. With ethanol as a recovery solvent, a recovery of xylanase activity of 78 ± 10% was obtained. The cellulase activity in the recovered xylanase was below the detection limit. The results demonstrate that an ionic surfactant can recover enzymes from aqueous solutions without loss in their activity. © 2004 Wiley Periodicals, Inc.

Journal

Biotechnology and BioengineeringWiley

Published: Jun 20, 2004

Keywords: xylanase; cellulase; precipitating ligand; AOT; recovery solvent; selectivity

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