申请人:Hogy Medical Co., Ltd.
公开号:EP0926497A2
公开(公告)日:1999-06-30
Disclosed is a colorimetric sensor comprising polydiacetylene membrane liposomes, a polydiacetylene membrane film or fine particles coated with a polydiacetylene membrane, in which the polydiacetylene membrane is incorporated with a protein having a reduced molecular weight low enough not to cause color change in the polydiacetylene membrane. The examples of the reduced-molecular-weight proteins include an antibody Fab' fragment, an antigenic protein of molecular weight of 100,000 or less, and a peptide consisting of 3-20 amino acid residue, which undergo an antigen-antibody reaction with an antigen or antibody contained in a sample. As the reduced-molecular-weight protein is also employed a combination of single-stranded DNA of 100 bases or less which hybridizes with single-stranded DNA contained in a sample to form a double-stranded DNA, and an antibody which reacts with said double-stranded DNA but does not react with the single-stranded DNA contained in the sample. A method for analysis of biosample is also disclosed, which comprises contacting the colorimetric sensor with a solution sample and utilizing an absorption measurement or a visual observation with the naked eye to detect color change in the polydiacetylene membrane.
本发明公开了一种比色传感器,包括聚二乙烯膜脂质体、聚二乙烯膜薄膜或涂有聚二乙烯膜的细颗粒,其中聚二乙烯膜掺入了一种蛋白质,该蛋白质的分子量降低到足以不引起聚二乙烯膜的颜色变化。降低分子量蛋白质的例子包括抗体 Fab'片段、分子量为 100,000 或更小的抗原蛋白和由 3-20 个氨基酸残基组成的肽,它们会与样品中的抗原或抗体发生抗原-抗体反应。作为减小分子量的蛋白质,还采用了 100 个碱基或更少的单链 DNA 与样品中的单链 DNA 杂交形成双链 DNA 的组合,以及与上述双链 DNA 反应但不与样品中的单链 DNA 反应的抗体。还公开了一种分析生物样品的方法,包括将比色传感器与溶液样品接触,利用吸收测量或肉眼观察来检测聚二乙烯膜的颜色变化。