Biotechnology of Microbial Exopolysaccharides by Ian W. Sutherland PDF

By Ian W. Sutherland

ISBN-10: 0511525389

ISBN-13: 9780511525384

ISBN-10: 0521063949

ISBN-13: 9780521063944

ISBN-10: 0521363500

ISBN-13: 9780521363501

This quantity presents an intensive account of the constitution and synthesis of microbial exopolysaccharides and in their common program throughout a vast diversity of industries, together with meals, oil and drugs. The winning exploitation of those polysaccharides calls for a valid medical figuring out in their chemical and actual homes and likewise their biochemistry and biosynthesis.

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Extra resources for Biotechnology of Microbial Exopolysaccharides

Example text

The enzymes have the additional value that they can be used to yield relatively large quantities of oligosaccharides of the isomaltose series. C. 41) Three specific endoenzymes acting on pullulan have been described, each being devoid of effect on the corresponding polysaccharide of uniform linkage. Pullulanase cleaves the 1,6-a-D-glucosyl linkage to yield maltotriose as the final product. The enzyme hydrolyses pullulan randomly, the initial products being hexasaccharides and nonasaccharides. These are eventually degraded to give maltotriose.

Products not identified. a glucose, laminaribiose, etc. 2. Dextranases Source Mode of action Products Achromobacter sp. Streptococcus mutans Pseudomonas sp. UQM733 Cladosporium resinae Pseudomonas sp. NRRL B12324 Aspergillus nidulans Flavobacterium sp. Arthrobacter globiformis Streptococcus mitis exohydrolase endodextranase endodextranase endo-1,3-a-D-glucanase endo-1,3-a-D-glucanase exoglucanase endoglucanase exo-1,6-a-D-glucanase exo-1,6-a-D-glucanase isomaltose, limit dextrin glucose, isomaltose, isomaltotriose etc.

D. & Jurasek, L. (1979). Hydrolysis of Cellulose: Mechanisms of enzymatic and acid hydrolysis. ACS Symposium 181. American Chemical Society, Washington. Rieger-Hug, D. & Stirm, S. (1981). Comparative Study of Host Capsule Depolymerases associated with Klebsiella Bacteriophages. Virology 113, 363-78. Tipson, R. S. & Horton, D. ) (1986). Advances in Carbohydrate Chemistry and Biochemistry, vol. 44. Academic Press, London. 1. Introduction The biosynthesis of most exopolysaccharides closely resembles the process by which the bacterial wall polymers peptidoglycan and lipopolysaccharide are formed.

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Biotechnology of Microbial Exopolysaccharides by Ian W. Sutherland

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