The present invention provides a nucleic acid probe that can achieve high detection sensitivity and high specificity in mutation detection, mismatch detection, etc. by the PCR method, a method for designing such a nucleic acid probe, and a method for detecting a target sequence. The nucleic acid probe includes a nucleic acid molecule, and the nucleic acid molecule includes a plurality of fluorescent dye moieties that exhibit an excitonic effect. At least two of the fluorescent dye moieties that exhibit an excitonic effect are bound to the same base or two adjacent bases in the nucleic acid molecule with each fluorescent dye moiety being bound via a linker (a linking atom or a linking atomic group). The extension-side end of the nucleic acid molecule is chemically modified, thereby preventing an extension reaction of the nucleic acid molecule.
本发明提供了一种在利用 PCR 方法检测突变、错配等时可实现高检测灵敏度和高特异性的核酸探针、设计这种核酸探针的方法以及检测目标序列的方法。核酸探针包括核酸分子,核酸分子包括多个表现出激发效应的荧光
染料分子。至少两个具有激发效应的荧光
染料分子与核酸分子中的相同碱基或两个相邻碱基结合,每个荧光
染料分子通过连接体(连接原子或连接原子团)结合。核酸分子的延伸侧端经过
化学修饰,从而防止核酸分子发生延伸反应。