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1. (Article ID: 5295)
Han YW, Clarke MA
Production and characterization of microbial levan
Journal of Agricultural and Food Chemistry 38(2) (1990)
393-396
A levan-producing bacterium was isolated from soil. Cultural and physiological characteristics of the isolate identified the organism as a strain of Bacillus polymyxa. The organism's characteristics for polysaccharide synthesis were studied. The bacterium produced polysaccharide in high yield when grown on sucrose solution. Hydrolysis and subsequent analysis showed the product to consist entirely of D-fructose. 13C NMR and methylation analyses indicated the product to be a β(2→6)-linked polymer of fructose, with 12% branching. The polysaccharide has a molecular weight of about 2 million and is readily soluble in water.
production, sucrose, levan, Bacillus polymyxa
Publication DOI: 10.1021/jf00092a011Journal NLM ID: 0374755Publisher: American Chemical Society
Institutions: Southern Regional Research Center, USDA, New Orleans, USA, Sugar Processing Research Inc., New Orleans, USA
Methods: 13C NMR, GLC, HPLC, extraction, optical rotation measurement, CC, cell growth, ethanol precipitation
The publication contains the following compound(s):
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2. (Article ID: 5658)
Park JK, Khan T
Other microbial polysaccharides: pullulan, scleroglucan, elsinan, levan, alternant, dextran
Book: Handbook of Hydrocolloids (2009)
Chapter 21, 592-614
Other microbial polysaccharides (pullulan, scleroglucan, elsinan, levan, alternan, dextran) deals with the miscellaneous polysaccharides possessing important and potential applications in the food industry. It provides a comprehensive but concise description of all these microbial polysaccharides. The chapter begins with an introductory section which gives a brief overview of the polysaccharides. This section is followed by respective sections for each of the individual polysaccharides. Each of these sections discuss the origin and manufacture, chemical structure, functional properties, technical data, uses and applications and regulatory status of each polysaccharide. The chapter concludes with the future prospects of these polysaccharides
Dextran, levan, pullulan, scleroglucan, elsinan, alternan
Publication DOI: 10.1533/9781845695873.592Publisher: Boca Raton, FL: Cambridge, England: CRC Press, Woodhead Pub
Editors: Phillips GO, Williams PA
Institutions: Kyungpook National University, Daegu, South Korea, COMSATS Institute of Information Technology, Islamabad, Pakistan
The publication contains the following compound(s):
- Compound ID: 14321
Structure type: homopolymer
; 2000-100000000
Trivial name: levan
Compound class: polysaccharide, fructan
Reference(s) to other database(s): GTC:G29465PK
- Compound ID: 14323
Structure type: structural motif or average structure
; 10000000-100000000
Trivial name: dextran
Compound class: glucan, polysaccharide
Reference(s) to other database(s): GTC:G36375DE
- Compound ID: 14322
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a-D-Glcp-(1-3)-a-D-Glcp-(1-6)-20%a-D-Glcp-(1-6)-+
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-3)-a-D-Glcp-(1-6)-a-D-Glcp-(1- |
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Structure type: structural motif or average structure
; 1000000-10000000
Trivial name: alternan
Compound class: glucan, polysaccharide
Reference(s) to other database(s): GTC:G11511PX
- Compound ID: 21066
Structure type: polymer chemical repeating unit
; 10000-3000000
Trivial name: pullulan
Compound class: EPS, glucan, polysaccharide
Reference(s) to other database(s): GTC:G71532WE
- Compound ID: 19476
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b-D-Glcp-(1-6)-+
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-3)-b-D-Glcp-(1-3)-b-D-Glcp-(1-3)-b-D-Glcp-(1- |
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Structure type: polymer chemical repeating unit
; 130000-6000000
Trivial name: scleroglucan
Compound class: EPS, glucan, polysaccharide
Reference(s) to other database(s): GTC:G66305IS
- Compound ID: 21067
Structure type: structural motif or average structure
; 5000-10000000
Trivial name: elsinan
Compound class: glucan, polysaccharide
Reference(s) to other database(s): GTC:G06261MN
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