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    • 4. 发明授权
    • Immunoassay element containing a pulverized water-insoluble
polysaccharide and process for immunoassay
    • 含有粉碎水不溶性多糖的免疫测定元件和免疫测定方法
    • US5547848A
    • 1996-08-20
    • US393240
    • 1995-02-23
    • Hiroshi ShinokiToshikage HiraokaMasashi Ogawa
    • Hiroshi ShinokiToshikage HiraokaMasashi Ogawa
    • G01N33/542G01N33/543G01N33/558G01N33/535G01N33/548
    • G01N33/54386G01N33/558
    • An immunoassay element for quantitatively analyzing a ligand by determining the change in enzymatic activity. When the ligand is a low molecular weight antigen, competitive reactions between the ligand, enzyme-labelled antibody and conjugate of the antigen and high molecular weight compound are utilized. When the ligand is a macromolecular antigen, a reaction between the ligand and an enzyme-labelled antibody is utilized directly. The immunoassay element comprises a substrate layer containing a non-diffusible substrate which forms a diffusible material in the presence of the enzyme, and a reagent layer for detecting the thus formed diffusible material. The non-diffusible substrate is composed of a pulverized insoluble polysaccharide. The reagent layer may further contain a fragmenting enzyme for further fragmenting the non-diffusible material. Also provided are processes for quantitatively analyzing both of low molecular weight and macromolecular antigens contained in any samples by the use of the immunoassay elements of the invention.
    • 用于通过确定酶活性的变化定量分析配体的免疫测定元件。 当配体是低分子量抗原时,配体,酶标记抗体与抗原结合物和高分子量化合物之间的竞争性反应被利用。 当配体是大分子抗原时,直接使用配体和酶标记的抗体之间的反应。 免疫测定元件包括含有在酶存在下形成可扩散材料的不扩散基底的基底层和用于检测由此形成的可扩散材料的试剂层。 非扩散性基材由粉碎的不溶性多糖组成。 试剂层可以进一步包含用于进一步碎裂非扩散材料的碎裂酶。 还提供了通过使用本发明的免疫测定元件定量分析任何样品中所含的低分子量和大分子抗原的方法。