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  • 1
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Microbial cells and cellular organelles were immobilized by mixing aqueous suspensions of the biocatalysts with water-miscible urethane prepolymers. Thus immobilized preparations of acetone-dried cells of Arthrobacter simplex and thawed cells of Nocardia rhodocrous showed appreciable {ie351-1} activities in the transformation of hydrocortisone into prednisolone and 4-androstene-3,17-dione to androst-1,4-diene-3,17-dione, respectively. The activities of catalase and alcohol oxidase were observed in the immobilized peroxisomes (microbodies) of a methanol-grown yeast Kloeckera sp. No. 2201. Yeast mitochondria entrapped with the prepolymer showed adenylate kinase activity. These results indicate the usefulness of the urethane prepolymers as convenient materials for entrapment of not only enzymes, but also organelles and microbial cells.
    Type of Medium: Electronic Resource
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