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• W1985280235 endingPage "137" @default.
• W1985280235 startingPage "129" @default.
• W1985280235 abstract "Although quadruplex nucleic acids are thought to be involved in many biological processes, they are massively overwhelmed by duplex DNA in the cell. Small molecules, able to probe quadruplex nucleic acids with high optical selectivity, could possibly achieve the visualization of these processes. The aim of the method described herein is to evaluate quickly the optical selectivity of quadruplex nucleic acid probes, in isothermal conditions, using widely available materials, small quantities of oligonucleotides and virtually any kind and quantity of biological competitor. The assay relies on the use of streptavidin-coated paramagnetic particles and biotinylated quadruplex forming oligonucleotides, allowing a quick and easy separation of the quadruplex target from the competitor. In the present study, two quadruplex nucleic acids (the DNA and RNA human telomeric repeats) have been used as targets while a duplex DNA oligonucleotide, total DNA, total RNA, another quadruplex nucleic acid and a protein have been used as competitors. The optical selectivity of various probes, displaying different photophysical properties and binding selectivities, has been successfully examined, allowing the identification of a best candidate for further cell microscopy experiments. This assay allows a quick and reliable assessment of the labeling properties of a quadruplex binder in cellular environment conditions. It is an interesting alternative to gel electrophoresis experiments since it is performed in solution, has a well-resolved separation system and allows easy quantifications." @default.
• W1985280235 created "2016-06-24" @default.
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• W1985280235 date "2012-05-01" @default.
• W1985280235 modified "2023-10-17" @default.
• W1985280235 title "A streptavidin paramagnetic-particle based competition assay for the evaluation of the optical selectivity of quadruplex nucleic acid fluorescent probes" @default.
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• W1985280235 doi "https://doi.org/10.1016/j.ymeth.2012.02.008" @default.
• W1985280235 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22406492" @default.
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