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Continuous isomerization of D-fructose to D-mannose by immobilized Agrobacterium radiobacter cells
Jun Hirose1, Yuka Kinoshita, Seijiro Fukuyama
1Department of Applied Chemistry, Faculty of Engineering, Miyazaki University, Miyazaki 889-2192, Japan. jhirose@cc.miyazaki-u.ac.jp
Biotechnology Letters
|July 29, 2003
Abstract:
D-Fructose was isomerized to D-mannose using immobilized Agrobacterium radiobacter that produces a thermostable mannose isomerase. The cells were immobilized by adsorption on chitosan or by glutaraldehyde crosslinking in the presence of albumin. Optimum conditions for mannose isomerase activity were 60 degrees C and pH 7.5. Continuous reaction at 55 degrees C was achieved with immobilized cells packed in a column to produce D-mannose.