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 straightforward preparation of primary alkyl triflates and their utility in the synthesis of derivatives of ethidium
作者:Steven A. Ross、Marguerite Pitié、Bernard Meunier
DOI:10.1039/a908389h
日期:——
The reaction of primary alcohols with trifluoromethanesulfonic anhydride in the presence of poly(4-vinylpyridine) [or poly(2,6-di-tert-butyl-4-vinylpyridine)] allows the isolation of the corresponding alkyltriflates in good yields. The quaternisation of 3,8-bis(ethoxycarbonylamino)-6-phenylphenanthridine (1) using these alkyltriflates was found to proceed smoothly at room temperature in nitrobenzene
DNA Binding of an Ethidium Intercalator Attached to a Monolayer-Protected Gold Cluster
作者:Gangli Wang、Jian Zhang、Royce W. Murray
DOI:10.1021/ac0257804
日期:2002.9.1
Ethidium intercalation has been investigated as a means of inducing binding of Au nanoparticles to DNA. The ethidium sites are attached to the nanoparticles as thiolate ligands, using 3,8-diamino-5-mercaptododecyl-6-phenylphenanthridinium (ethidium thiolate). Each nanoparticle bears only one or two ethidium thiolate ligands. The rest of the thiolate monolayer ligands on the monolayer-protected Au clusters (MPCs) were either N-(2-mercaptopropionyl)glycine (tiopronin/ethidium MPC) or trimethyl(mercaptoundecyl)ammonium (TMA/ethidium MPC). In solution mixtures of DNA and MPCs, the energy-transfer quenching of the ethidium ligands by the metal-like MPC core is partially released by ethidium binding to DNA, as observed by an increase in the intensity of ethidium fluorescence. Binding of the cationic TMA/ethidium MPC to DNA was efficient and rapid. The negatively charged tiopronin/ethidium MPC, in contrast, exhibits slow intercalation kinetics, relative to ethidium cation not attached to an MPC. The slow kinetics were analyzed as two competing binding interactions. The tiopronin/ethidium MPC binding to DNA was imaged by AFM.