The invention describes the preparation and use of fluorescent stains for nucleic acids derived from unsymmetrical cyanine dyes comprising a substituted benzazolium ring system linked by a methine bridge to a pyridinium or quinolinium ring system having at least one substituent on the pyridinium or quinolinium ring that contains a heteroatom. The presence of the heteroatom-containing substituent results in higher sensitivity to oligonucleotides and larger nucleic acid polymers in a wide range of cells and gels, and for use in analysis of cell structure, membrane integrity or function.
这项发明描述了利用非对称青光菁
染料制备和使用荧光
染料来标记核酸的方法。这些
染料包括一个取代
苯并咪唑环系统,通过甲基桥与至少一个含有杂原子的
吡啶或
喹啉环系统相连。杂原子取代基的存在使得这些
染料对寡核苷酸和大分子核酸在各种细胞和凝胶中具有更高的灵敏度,并可用于细胞结构、膜完整性或功能的分析。