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    • 9. 发明授权
    • Novel radioassay procedure
    • 小说传记录音程序
    • US4372941A
    • 1983-02-08
    • US184653
    • 1980-09-05
    • James W. Ryan
    • James W. Ryan
    • C07K5/087C12Q1/37A61K43/00
    • C07K5/0812C12Q1/37
    • A rapid, efficient and accurate method is provided for quantitatively assaying for an enzyme, such as angiotensin converting enzyme, an aminopeptidase, a carboxypeptidase, or trypsin, which catalyzes hydrolysis of a radiolabelled substrate to produce a radiolabelled remnant product preferentially soluble in a water-immiscible organic solvent, whereby the assay is conducted in a vial having a volume of not more than 20 milliliters, preferably 7 ml. or less, by incubating substrate in buffer and sample, stopping the reaction after a predetermined time with, e.g., acid or base, adding the water-immiscible organic solvent containing scintillant, capping the vial, mixing by inverting the vial whereupon a spontaneous phase separation occurs. The radioactivity of the organic phase is then counted in an appropriate scintillation counter and the enzymic activity is thereupon calculated.
    • 提供了一种快速,有效和准确的方法来定量测定酶,例如血管紧张素转换酶,氨基肽酶,羧肽酶或胰蛋白酶,其催化放射性标记的底物水解产生优选溶于水溶性的放射性标记的残留产物, 不混溶的有机溶剂,其中测定在体积不大于20毫升,优选7毫升的小瓶中进行。 或以下,通过将缓冲液和样品中的底物孵育,在例如酸或碱等预定时间后停止反应,加入含有闪烁体的与水不混溶的有机溶剂,盖上小瓶,通过翻转小瓶进行混合,从而自发相分离 发生。 然后在合适的闪烁计数器中计数有机相的放射性,并计算酶活性。