There is described an enzyme inhibitor labelled immunoassay for measuring the concentration of an analyte in a sample wherein the substrate for the enzyme forms at least a part of the sample. In a particular embodiment the sample comprises or consists of a milk sample and the inhibitor label is capable of inhibiting the activity of an enzyme capable of clotting milk. Examples are given of suitable inhibitors. The assay described may be used to measure the concentration of progestagens or oestrogens in milk using the techniques of heterogeneous or homogeneous enzyme inhibitor labelled immunoassay. The results of such an assay give an indication of the fertility of a milk producing domestic animal (e. g. a cow) and may be used to diagnose pregnancy of such an animal. Particular compounds for use in the assay are described, as is a kit of reagents for use in the assay.
本发明描述了一种酶
抑制剂标记免疫测定法,用于测量样品中分析物的浓度,其中酶的底物至少构成样品的一部分。在一个特定的实施方案中,样品包括或由牛奶样品组成,
抑制剂标签能够抑制能够凝结牛奶的酶的活性。本文举例说明了合适的
抑制剂。所述检测方法可用于使用异构或同构酶
抑制剂标记免疫检测技术来测量牛奶中孕激素或
雌激素的浓度。这种检测的结果可显示产奶家畜(如奶牛)的生育能力,并可用于诊断该家畜是否怀孕。本文介绍了用于该测定法的特定化合物,以及用于该测定法的试剂盒。