A diagnostic kit, method, and apparatus for electrochemically determining the presence or concentration of an analyte in a sample. A mixture is formed which includes the sample, an enzyme acceptor polypeptide, an enzyme donor polypeptide, and a labeled substrate. The enzyme donor polypeptide is capable of combining with the enzyme acceptor polypeptide to form an active enzyme complex. The formation of such the active enzyme complex is responsive to the presence or concentration of the analyte in the fluid sample. The active enzyme hydrolyzes the labeled substrate, resulting in the generation of an electroactive label, which can then be oxidized at the surface of an electrode. A current resulting from the oxidation of the electroactive compound can be measured and correlated to the concentration of the analyte in the sample.
一种诊断试剂盒、方法和仪器,用于电
化学测定样品中分析物的存在或浓度。形成的混合物包括样品、酶受体
多肽、酶供体
多肽和标记底物。酶供体
多肽能与酶受体
多肽结合形成活性酶复合物。这种活性酶复合物的形成与流体样本中分析物的存在或浓度有关。活性酶
水解标记底物,产生电活性标记,然后在电极表面氧化。电活性化合物氧化产生的电流可以测量,并与样品中分析物的浓度相关联。