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Structure type: homopolymer ; 2000000
Trivial name: levan
Compound class: O-polysaccharide, fructan
Contained glycoepitopes: IEDB_923066

• 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/jf00092a011
  Journal NLM ID: 0374755
  Publisher: 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
  
   
  
  Bacillus polymyxa NRRL B-18475
  CSDB ID 44256 (all data & tools)

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Structure type: homopolymer ; 2000-100000000
Trivial name: levan
Compound class: polysaccharide, fructan
Contained glycoepitopes: IEDB_923066

• 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: 10.1533/9781845695873.592
  Publisher: 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
  
   
  
  Bacillus subtilis, Bacillus polymyxa, Bacillus polymyxa NRRL B-18475, Aerobacter levanicum, Streptococcus, Pseudomonas, Corynebacterium laevaniformans
  CSDB ID 48428 (all data & tools)