Cyanine7 NHS ester
胺类活性染料,近红外荧光染料,Cy7®的改进的类似物。近红外荧光素可以被用来利用生物组织的近红外窗口。在这个光谱区域,高度增强的组织透明度使得活体成像成为可能。该染料可用于制备CY7标记的生物分子来进行后续试验,如活体研究及开发相关实验。Cy7的特殊结构加固了中心聚亚甲基(polymethyne)链的稳定性。这种增强的分子结构会使其产率较其母结构提供20%,因此它的荧光强度会更大。该试剂在标记时需要共溶剂有机溶剂。水溶Cy7 NHS ester可以用于蛋白NIR标记。
Sulfo-Cyanine7 maleimide
A reactive dye with a maleimide group for the labeling of thiol groups of proteins and other biomolecules, an analog of Cy7® maleimide.
Sulfo-Cyanine7 is a near infrared fluorophore which is hydrophilic and contains a rigidizing ring in its heptamethine chain that improves its photophysical properties. A great dye for various applications, including NIR imaging.
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荧光染料是指吸收紫外线或可见光后发射波长较长的可见光的物质,大多是含有苯环或杂环并带有共轭双键的化合物。其用途广泛,医学上可用于进行基因检测、分类与识别,尤其在单分子技术中。荧光染料也起到了重要作用由于其高灵敏度、操作方便等优点荧光染料作为标记物已广泛应用于荧光免疫、荧光探针、细胞染色等多个方面。很多单分子技术,如荧光共振能量转移、双光子融合技术等,运用染料分子来标记待测物质,测得其荧光光谱从而阐述DNA转录、RNA聚合、动力蛋白和蛋白质折叠机理。