FOOD SCIENCE ›› 2004, Vol. 25 ›› Issue (5): 65-69.

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Purification and Characterization of Aspergillus niger Endoinulinase

 SHI  Xian-Jun, LIN  Ying, WU  Xiao-Ying   

  1. College of Food and Bioengineering, South China University of Technology
  • Online:2004-05-15 Published:2011-10-24

Abstract: Three enzymes EI、EII and EIII were purified from crude A.niger inulinase Fructozyme by DEAE-Sepharose CL-6B ion-exchange chromatography.EI was identified as endoinulinase,its molecular weight was 65,000.The optimum reaction pHof endoinulinase was about 4.6 and optimum temperature was 60℃ when inulin was used as substrate. Thus Michaelis constantKm was 16mmol/L and endoinulinase was fairly stable to pH and temperature. The application of endoinulinase was approachedpreliminarily.

Key words: endoinulinase, inulin, ion-exchange chromatography, kinetics