Unsymmetrical cyanine dyes that incorporate an aza-benzazolium ring moiety are described, including cyanine dyes substituted by a cationic side chain, monomeric and dimeric cyanine dyes, chemically reactive cyanine dyes, and conjugates of cyanine dyes. The subject dyes are virtually non-fluorescent when diluted in aqueous solution, but exhibit bright fluorescence when associated with nucleic acid polymers such as DNA or RNA, or when associated with detergent-complexed proteins. A variety of applications are described for detection and quantitation of nucleic acids and detergent-complexed proteins in a variety of samples, including solutions, electrophoretic gels, cells, and microorganisms.
The invention provides compounds, including fluorescent nucleic acid dyes, and methods for use including nucleic acid detection. Further provided are kits, instruments and systems comprising compounds of the invention or adapted for use with compounds of the invention or other nucleic acid dyes.
A far-red fluorescent probe for selective G-quadruplex DNA targeting
作者:Feng Zhang、Gan Li、Fang-Lei Lv、Guang-Bin Jiang、Han-Xiang Wang、Ming-Qi Wang、Shuo Li
DOI:10.1016/j.tetlet.2018.07.037
日期:2018.8
rapid and simple approaches for detection of G-quadruplexDNA structures has attracted significant attention to disclose their diverse physiological and pathological functions. Thiazole orange (TO) is a common fluorescence probe used for the detection of G-quadruplexes. However, it still suffers from some common problems like non-selective for G-quadruplex and emission in the lower wavelength region
Abstract In this study, the structure and some molecular properties of a new substance sodium 4-[(4E)-4-[(2E)-2-(2-chloro-3-(E)-2-[1-(4-sulfonatobutyl)quinolinium-4-yl]ethenyl}-2,3-dihydro-1H-inden-1-ylidene)ethylidene]quinolin-1(4H)-yl]butane-1-sulfonate ( Q ) with maximum absorption in near-IR region ( λ max = 832 nm) was modeled using the Density Functional Theory method (DFT) and then synthesized
Thermostable polarizing PVA thin films based on dichroic dyes were created, and the photostability could be improved by incorporating ZnO nanoparticles in the polymer matrix.