Synthesis, properties and bioconjugation of water-soluble asymmetric indodicarbocyanine dyes
作者:Viktoriya E. Kuznetsova、Vadim A. Vasiliskov、Aleksandr S. Zasedatelev、Aleksandr V. Chudinov
DOI:10.1016/j.mencom.2008.05.009
日期:2008.5
New indodicarbocyanine dyes have been synthesised and converted into succinimidyl active esters for the fluorescent labeling of proteins and oligonucleotides.
Phosphine Quenching of Cyanine Dyes as a Versatile Tool for Fluorescence Microscopy
作者:Joshua C. Vaughan、Graham T. Dempsey、Eileen Sun、Xiaowei Zhuang
DOI:10.1021/ja3105279
日期:2013.1.30
We report that the cyanine dye Cy5 and several of its structural relatives are reversibly quenched by the phosphine tris(2-carboxyethyl)phosphine (TCEP). Using Cy5 as a model, we show that the quenching reaction occurs by 1,4-addition of the phosphine to the polymethine bridge of Cy5 to form a covalent adduct. Illumination with UV light dissociates the adduct and returns the dye to the fluorescent state. We demonstrate that TCEP quenching can be used for super-resolution imaging as well as for other applications, such as differentiating between molecules inside and outside the cell.