A method for enzyme immunoassay for a ligand suspected to be present in a liquid sample includes signal amplification by use of at least two enzymes and a blocked modulator for one of the enzymes. Ligand present in the liquid binds to an antiligand and an enzyme-labeled tracer. The resulting bound fraction is separated and the enzyme in the tracer removes the blocking group from the blocked modulator. The modulator activates or inhibits a second enzyme which catalyzes the conversion of a substrate to a product. The presence or absence of the ligand in the liquid is indicated by a signal, such as a color change or a rate of color change, associated with the product. The invention includes a new class of enzyme inhibitors and blocked inhibitors and a kit of materials useful for performing the method of the invention.
一种对怀疑存在于液体样品中的
配体进行酶免疫测定的方法,包括使用至少两种酶和其中一种酶的阻断调节剂进行信号放大。 液体中存在的
配体与抗
配体和酶标记的示踪剂结合。 由此产生的结合部分被分离,示踪剂中的酶从阻断调节剂中去除阻断基团。 调节剂激活或抑制第二种酶,该酶催化底物向产物的转化。 液体中
配体的存在与否通过与产物相关的信号(如颜色变化或颜色变化率)来指示。 本发明包括一类新的酶
抑制剂和阻断
抑制剂,以及一套用于实施本发明方法的材料。