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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Gibbs, M. D. Reeves, R. A. Hardiman, E. M. Choudhary, P. R. Daniel, R. M. Bergquist, P. L. |
| Description | Country affiliation: Australia Author Affiliation: Gibbs MD ( Applimex Systems Pty Ltd, North Ryde, NSW 2109, Australia.) |
| Abstract | Xylanases have several industrial uses, particularly in baking, modification of animal feed and in pulp bleaching in the paper industry. Process conditions in kraft pulp bleaching generally favour an enzyme that is active at high pH values. The activities of several glycosyl hydrolase family 11 xylanases reported to be active under alkaline conditions were determined under optimal conditions and found to have optima in the pH 5-6 range. Only one enzyme tested, BadX, was shown to have an alkaline pH optimum. Significant activity at pH values higher than 8 appears often to be the result of excess enzyme added to the reaction mixtures so that substrate is limiting. The different nature of laboratory and industrial substrates needs to be taken into consideration in designing assay conditions. In some cases, significant differences were observed in pH profiles generated using a small-molecule substrate when compared to those generated using xylan. We conclude that small-molecule substrates are not a suitable proxy for determining the pH profiles of family 11 xylanases. |
| File Format | HTM / HTML |
| ISSN | 18716784 |
| Issue Number | 6 |
| Volume Number | 27 |
| e-ISSN | 18764347 |
| Journal | New Biotechnology |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-12-31 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biomedical Engineering Discipline Molecular Biology Bacterial Proteins Chemistry Metabolism Hydrogen-ion Concentration Xylosidases Animals Genetics Recombinant Proteins Temperature Xylans Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Molecular Biology Bioengineering Biotechnology |
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