A method for immunoassay for a ligand suspected to be present in a fluid includes use of an enzyme, a metal ion catalyst for an indicator reaction and a blocked modulator for the catalyst. Ligand present in the fluid binds to an antiligand. The resulting bound fraction activates the enzyme to unblock the modulator. The free modulator activates or inhibits the catalyst thereby modulating the rates of an indicator reaction between a substrate and a redox reagent. The presence or absence of the ligand in the fluid is indicated by a signal, such as a colour change or a rate of colour change, consequent to the indicator reaction. The invention also includes a kit of materials useful for performing the method of the invention.
一种对疑似存在于液体中的
配体进行免疫测定的方法包括使用酶、用于指示剂反应的
金属离子催化剂和用于催化剂的阻断调节剂。 液体中存在的
配体与抗
配体结合。 由此产生的结合部分激活酶以解除对调节剂的阻断。 游离调节剂激活或抑制催化剂,从而调节底物与氧化还原试剂之间指示剂反应的速率。 液体中
配体的存在与否通过指示剂反应产生的信号(如颜色变化或颜色变化速率)来指示。 本发明还包括用于执行本发明方法的材料包。