Electrochemical assay for nucleic acids and nucleic acid probes
    1.
    发明授权
    Electrochemical assay for nucleic acids and nucleic acid probes 失效
    核酸和核酸探针的电化学测定

    公开(公告)号:US4840893A

    公开(公告)日:1989-06-20

    申请号:US769629

    申请日:1985-10-15

    摘要: The present invention discloses an assay for nucleic acid which comprises the steps of;(a) providing a probe material comprising;(i) a sequence of nucleic acids complementary to a given target sequence and,(ii) a first ligand chemically linked thereto and capable of a specific binding reaction with an antiligand;(b) contacting the said probe material with an assay system comprising:(i) a suitable mediator, enzyme, substrate system capable of transferring charge to an electrode surface when the enzyme is catalytically active, and;(ii) a second ligand chemically linked to one of said mediator, enzyme or substrate, wherein the second ligand is capable of a competitive binding reaction with the antiligand, and;(iii) the said antiligand, Whereby the said first ligand competes with the said second ligand in a specific binding reaction with the antiligand, and;(c) contacting the above system with a solution suspected of containing the said target sequence whereby the binding of any of the said target sequence present to the probe affects the availability of the first ligand and therefore alters the rate of charge transfer to the electrode.

    摘要翻译: PCT No.PCT / GB84 / 00432 Sec。 371日期1985年10月15日第 102(e)日期1985年10月15日PCT提交1984年12月14日PCT公布。 出版物WO85 / 02627 1985年6月20日,本发明公开了一种核酸检测方法,包括以下步骤: (a)提供探针材料,包括: (i)与给定靶序列互补的核酸序列,和(ii)与其结合化学连接且能够与抗配体结合的特异性结合反应的第一配体; (b)使所述探针材料与测定系统接触,所述测定系统包括:(i)当酶是催化活性时能够将电荷转移到电极表面的合适的介体,酶,底物系统; (ii)与所述介体,酶或底物之一化学连接的第二配体,其中所述第二配体能够与所述反配体发生竞争性结合反应;和 (iii)所述抗配糖剂,其中所述第一配体与所述第二配体竞争与所述反配体的特异性结合反应; (c)将上述系统与疑似含有所述靶序列的溶液接触,由此存在的任何所述靶序列与探针的结合影响第一配体的可用性,并因此改变电荷向电极转移的速率。