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.
本发明提供了一种核酸探针,该探针可以通过PCR方法在突变检测、错配检测等方面实现高检测灵敏度和高特异性,以及设计这种核酸探针的方法和检测目标序列的方法。该核酸探针包括一个核酸分子,该核酸分子包括多个表现出激子效应的荧光
染料基团。至少两个表现出激子效应的荧光
染料基团与核酸分子中的同一碱基或相邻的两个碱基结合,每个荧光
染料基团通过连接物(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,从而防止核酸分子的扩增反应。