Enzyme Coupled Lactose Sensors Based on Bienzyme Membrane Prepared by an Avidin/Biotin Method (特集 バイオセンサ) Enzyme coupled lactose sensors based on bienzyme membrane prepared by an avidin/biotin method

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Lactose sensors were fabricated by an avidin/biotin method. Biotinylated glucose oxidase (GOx) and β-galactosidase (β-Gal) formed bienzyme membrane on a Pt electrode by a layer-by-layer deposition of avidin and the biotinylated enzymes. The modified electrode functioned satisfactorily as a lactose sensor, in which two enzymatic reactions were coupled. Ten layers of GOx were deposited on the electrode, and then β-Gal layers were deposited step by step on the GOx layer. The response current of the sensor to lactose increased with increasing the number of depositions of β-Gal; I<sub>max</sub> values were 8.4 nA for 2 layers, and 81.3 nA for 12 layer of β-Gal.<br>Three types of arrangement of the enzymes in the membrane were prepared; (5x GOx)+(5x β-Gal), (5x β-Gal)+(5x GOx) and 5x (GOx+β-Gal). The sensor modified with the alternate layers of GOx and β-Gal, 5x (GOx+β-Gal), exhibited a highest signal for lactose. The avidin/biotin method was shown to be useful to optimize composition of the bienzyme membrane.

収録刊行物

  • 電気学会論文誌. E, センサ・マイクロマシン準部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A publication of Sensors and Micromachines Society  

    電気学会論文誌. E, センサ・マイクロマシン準部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A publication of Sensors and Micromachines Society 119(11), 576-580, 1999-11 

    The Institute of Electrical Engineers of Japan

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各種コード

  • NII論文ID(NAID)
    10004834605
  • NII書誌ID(NCID)
    AN1052634X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13418939
  • NDL 記事登録ID
    4892813
  • NDL 雑誌分類
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL 請求記号
    Z16-B380
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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