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    • 74. 发明公开
    • METHODS FOR PREPARING BIOREACTORS
    • 用于生产生物反应器
    • EP0919616A1
    • 1999-06-02
    • EP97933862.1
    • 1997-07-30
    • FUJISAWA PHARMACEUTICAL CO., LTD.
    • ASAI, Katsushi
    • C12N9/00C12N11/06C12N9/80
    • C12N9/80C12N11/02C12N11/08Y10S435/816
    • Methods for purifying enzymes, in particular, acylases characterized by selectively aggregating and precipitating contaminating enzymes, in particular, deacetylases with the use of surfactants, in particular, cationic surfactants; methods for regenerating immobilized enzyme carriers, in particular, those made from synthetic absorbents or ion exchange resins by treating immobilized enzymes prepared by bonding the enzymes to the carriers optionally followed by cross-linking with proteases; methods for regenerating carriers as described above wherein the carriers are porous ones; and methods for regenerating carriers as described above wherein the enzyme is a cephalosporin C acylase. By the above methods for purifying enzymes, contaminating enzymes which are undesirable for the target enzymes but cannot be eliminated by the conventional separation techniques can be selectively eliminated. Thus, these methods are useful in the production of highly pure enzyme specimens. Compared with the conventional methods, the above-mentioned methods for regenerating immobilized enzyme carriers make it possible to very efficiently eliminate the enzymes from the carriers, in particular, porous ones through digestion with proteases. Therefore, the carriers can be used repeatedly, which makes these methods useful from the viewpoints of the environment and cost.
    • 76. 发明公开
    • Novel creatine amidinohydrolase, production thereof and use thereof
    • Neue Creatinamidohydrolase,ihre Herstellung und Verwendung
    • EP0790303A1
    • 1997-08-20
    • EP97102270.2
    • 1997-02-13
    • Toyo Boseki Kabushiki Kaisha
    • Sogabe, Atsushi, Toyo Boseki K.K.Hattori, Takashi, Toyo Boseki K.K.Nishiya, Yoshiaka, Toyo Boseki K.K.Kawamura, Yoshihisa, Toyo Boseki K.K.
    • C12N9/78C12N9/80C12Q1/34
    • G01N33/52C12Q1/34G01N2333/978Y10S435/829
    • A creatine amidinohydrolase having the following physicochemical properties:

      Action: catalyzing the following reaction; creatine + H 2 O → sarcosine + urea
      Optimum temperature: about 40 - 50°C
      Optimum pH: pH about 8.0 - 9.0
      Heat stability: not more than about 50°C (pH 7.5, 30 min)
      Km value for creatine in a coupling assay using a sarcosine oxidase and a peroxidase: about 3.5 - 10.0 mM
      Molecular weight: about 43,000 (SDS-PAGE)
      Isoelectric point: about 3.5,
      a method for producing said enzyme, comprising culture of microorganism producing said enzyme, a method for the determination of creatine or creatinine in a sample using said enzyme, and a reagent therefor. According to the present invention, a creatine amidinohydrolase having a smaller Km value than that of the conventionally known creatine amidinohydrolase can be produced in an industrially large amount, and can be used as a routine reagent for clinical tests for determining creatine and creatinine in biological samples.
    • 具有以下物理化学性质的肌酸脒基水解酶:作用:催化以下反应; 肌酸+ H2O - >肌氨酸+尿素最佳温度:约40 - 50℃最佳pH:pH约8.0 - 9.0热稳定性:不超过约50℃(pH 7.5,30分钟)偶联试验中肌酸的Km值 使用肌氨酸氧化酶和过氧化物酶:约3.5-10.0mM分子量:约43,000(SDS-PAGE)等电点:约3.5,一种生产所述酶的方法,包括培养产生所述酶的微生物,测定方法 使用所述酶的样品中的肌酸或肌酸酐及其试剂。 根据本发明,具有比常规已知的肌酸脒基水解酶更小的Km值的肌酸脒基水解酶可以在工业上大量生产,并且可以用作生物样品中肌酸和肌酸酐测定的临床试验的常规试剂 。