title: Purification of fructooligosaccharides by immobilized yeast cells and identification of ethyl β-D-fructofuranoside as a novel glycoside formed during the process.
abstract: A yeast strain (XS1) capable of selective utilization of fructooligosaccharides (FOSs) syrup was identified as Wickerhamomyces anomala. Cells of W. anomala XS1 were immobilized in calcium alginate and incubated with an FOS mixture at 30 °C. The purity of the FOS increased from 54.4% to 80.1% (w/w) as 93.6% of monosaccharides were metabolized while the oligosaccharides were not affected. The immobilized yeast cells could be recycled 10 times and the corresponding batch treatments achieved FOS purities around 80%. Thus, the method could be promising for large-scale purification of FOS syrup at low cost. A byproduct formed by the yeast was identified as ethyl β-D-fructofuranoside by MS and NMR spectroscopy.
authors.affiliation: State Key Lab of Microbial Technology and National Glycoengineering Research Center, Shandong University, Jinan 250100, PR China.
authors.forename: Lili
authors.initials: L
authors.lastname: Lu
authors.forename: Jian
authors.initials: J
authors.lastname: Wu
authors.forename: Deyong
authors.initials: D
authors.lastname: Song
authors.forename: Han
authors.initials: H
authors.lastname: Zhao
authors.forename: Guofeng
authors.initials: G
authors.lastname: Gu
authors.forename: Yuchuan
authors.initials: Y
authors.lastname: Guo
authors.forename: Jin
authors.initials: J
authors.lastname: Lan
authors.forename: Min
authors.initials: M
authors.lastname: Xiao
mesh_terms: D001709:Biotechnology / Q000379:methods*; D018914:Cells, Immobilized; D005240:Feasibility Studies; D005632:Fructose / Q000737:chemistry / Q000378:metabolism; D005663:Furans / Q000737:chemistry / Q000378:metabolism; D006027:Glycosides / Q000737:chemistry* / Q000378:metabolism; D009844:Oligosaccharides / Q000302:isolation & purification*; D004718:Saccharomycetales / Q000378:metabolism*
chemical_list: D005663:Furans; D006027:Glycosides; D009844:Oligosaccharides; C116580:fructooligosaccharide; D005632:Fructose