English  |  正體中文  |  简体中文  |  Items with full text/Total items : 18055/20253 (89%)
Visitors : 25171314      Online Users : 459
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/25228

    標題: Preparation of carboxylated magnetic particles for the efficient immobilization of C-terminally lysine-tagged Bacillus Stearothermophilus aminopeptidaseII
    作者: Cheng-Liang Huang
    Wei-Chun Cheng
    Jia-Ci Yang
    Meng-Chun Chi
    Jiau-Hua Chen
    Hong-Ping Lin
    Long-Liu Lin
    貢獻者: 食品科技系
    日期: 2010-07
    上傳時間: 2012-05-22 13:53:29 (UTC+8)
    摘要: This article reports the synthesis and use of surface-modified iron oxide particles for the simultaneous purification and immobilization of Bacillus stearothermophilus aminopeptidase II ( BsAPII) tagged C-terminally with either tri- or nona-lysines ( BsAPII-Lys3/9). The carboxylated magnetic particles were prepared by the simple co-precipitation of Fe3+/Fe2+ in aqueous medium and then subsequently modified with adipic acid. Transmission electron microscopy (TEM) micrographs showed that the carboxylated magnetic particles remained discrete and had no significant change in size after binding BsAPIIs. Wild-type enzyme and BsAPII-Lys3 could be purified to near homogeneity by the carboxylated magnetic particles, but it was not easy to elute the adsorbed BsAPII-Lys9 from the matrix. Free BsAPII, BsAPII-Lys3, and BsAPII-Lys9 were active in the temperature range 50–70°C and all had an optimum of 50°C, whereas the optimum temperature and thermal stability of BsAPII-Lys3 and BsAPII-Lys9 were improved as a result of immobilization. The immobilized BsAPII-Lys9 could be recycled ten times without a significant loss of the enzyme activity and had a better stability during storage than BsAPII. Owing to its high efficiency and cost-effectiveness, this magnetic adsorbent may be used as a novel purification-immobilization system for the positively charged enzymes.
    關聯: Journal of Industrial Microbiology & Biotechnology 37(7):p.717-725
    Appears in Collections:[ 食品科技系 ] 期刊論文

    Files in This Item:

    File Description SizeFormat
    99_61_j.pdf696KbAdobe PDF427View/Open

    All items in CNU IR are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback