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    • 1. 发明公开
    • Immunoassay element
    • 免疫测定的元素
    • EP0884591A1
    • 1998-12-16
    • EP98110905.1
    • 1998-06-15
    • FUJI PHOTO FILM CO., LTD.
    • Sakaino, YoshikiIto, HitomiMori, ToshihiroSeshimoto, OsamuIto, ToshihisaAmano, Yoshikazu
    • G01N33/00C12Q1/40C12Q1/54C12Q1/28
    • G01N33/54386G01N2333/924Y10S435/966Y10S435/969Y10S435/97Y10S436/807Y10S436/81
    • The immunoassay element for quantitatively analyzing an antigen by determining the change in enzymatic activity of an enzyme-labelled antigen or antibody caused by an immunological reaction. The immunoassay element comprises a substrate layer containing a non-diffusible substrate which forms a diffusible material in the presence of the labelling enzyme, and a reagent layer containing a fragmenting enzyme for further fragmenting the diffusible material into a lower molecular weight product. As the non-diffusible substrate, a substrate capable of reacting solely with the lebelling enzyme and incapable of reacting the fragmenting enzyme is utilized. When an endo-active glucosidase is used as the labelling enzyme, and an exo-active glucosidase is used the fragmenting enzyme in the reagent layer, the non-diffusible substrate of the substrate layer is preferred to be an endo type selectively reactive substrate, which means a substrate having a reactivity specific to endo-active glucosidase. Highly sensitive assay is realized with high accuracy and high reproducibility and good storage stability.
    • 用于通过确定由免疫反应引起的酶标记的抗原或抗体的酶活性的变化来定量分析抗原的免疫测定元件。 免疫测定元件包括含有在标记酶存在下形成可扩散材料的非扩散性底物的底物层和含有用于将可扩散材料进一步碎裂成较低分子量产物的碎裂酶的试剂层。 作为非扩散性底物,可以使用能够仅与前体酶反应并且不能使片段化酶反应的底物。 当使用内源活性葡糖苷酶作为标记酶,并且在试剂层中使用断裂酶时,外源活性葡糖苷酶是底物层的非扩散性基质优选为内型选择性反应性底物,其中 是指具有对内源性葡糖苷酶特异性的反应性的底物。 高灵敏度测定以高精度,高重现性和良好的储存稳定性实现。
    • 10. 发明公开
    • Method for amplifying enzyme activity, enzyme conjugates suitable therefor and their preparation
    • 一种用于提高酶的活性的方法,化酶共轭体适合于该目的和它们的制备。
    • EP0243797A2
    • 1987-11-04
    • EP87105569.5
    • 1987-04-15
    • NORTHEASTERN UNIVERSITY
    • Giese, Roger W.Ehrat, MarkusCecchini, Douglas J.
    • C12Q1/00C12Q1/68
    • C12Q1/68C12Q1/00Y10S435/962Y10S435/966C12Q2521/543C12Q2565/518
    • The invention relates to a method for amplifying enzyme activity, spcecific enzyme conjugates suitable therefor and a method for their preparation.
      Enzyme amplification is achieved by covalently bonding enzyme to a support material via a molecular chain which is a substrate for the enzyme, then introducing a small amount of free enzyme to this system, causing release of a large amount of bound enzyme. Alternatively, complementary enzymatically inactive fragments of an active enzyme, which can recombine to form active enzyme, are covalently attached to separate support materials by a molecular chain material which is a substrate for the active enzyme, and these two fragment-support conjugates are connected in series. In a second alternative embodiment, two different active enzymes may be used. The method is suited e.g. for the S-peptide and S-protein fragments of ribonuclease S (RNaseS) which are preferably coupled to Sepharose gels, via a polycytidylic acid substrate leash. Also the released fragments recombine to give RNaseS activity. Thus this system provides more enzymatic activity from the system than is applied. 20 hours to yield activity equivalent to 1.911-g of RNase, by applying it to the S-peptide gel followed by combination of the released S-peptide with excess S-protein. Also, application of 1 ng of RNaseA to a three-stage amplification system in which each stage consists of a pair of S-peptide and S-protein gels produced cumulative amplifications of 4, 9, 52 and 25x after each to the stages, respectively. Only 1 - 2 mg amounts of each gel are used per stage in these experiments, reflecting the significant production of RNaseS activity.
      Molecular amplification factors of -2.104 can be achieved.
    • 本发明涉及的方法用于扩增酶活性,spcecific酶偶联物适合于此的方法和用于它们的制备。 酶扩增通过共价到载体材料经由一个分子链中的所有其是酶的底物结合的酶,然后引入游离酶少量该系统,引起大量的结合的酶的释放来实现。 可替代地,活性酶,其可重新结合形成活性酶的互补无酶活性的片段共价由分子链材料的所有其对于活性酶的底物附着到单独的载体材料,和论文2片段 - 载体缀合物被连接在 系列。 在第二替代实施例中,可以使用两种不同的活性酶。 该方法是适合E.G. 用于S-肽和核糖核酸酶S-(RNA酶),其优选地耦合到琼脂糖凝胶的S-蛋白质片段,通过胞苷酸基板皮带。 因此,释放的片段重组给予核糖核酸酶和活性。 因此,该系统提供了从系统比应用更酶活性。 20小时,以得到同等活性1.9亩克RNA酶的,通过将其应用到随后用过量S-蛋白释放的S-肽的组合的S-肽凝胶。 所以,分别应用1纳克的RNase A的,其中一对S-肽和S-蛋白凝胶中的每一级besteht产生的4,图9,52和25倍累积扩增每个所述阶段之后,一个三阶段的放大系统 , 每个凝胶的只有1〜2毫克量以每级中使用在合成实验,反映了显著生产RNA酶和活性。 的相似2.10分子扩增因子<4>可以实现的。