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- W1964439167 abstract "Uniformly sized (50 μm) porous glycidyl methacrylate/ethylene dimethacrylate particles (SINTEF) were used as the solid phase in a sandwich type mixed-phase hybridization assay based on time-resolved fluorescence detection on a single particle. These particles were coated with oligodeoxyribonucleotide probes by conventional phosphoramidite chain assembly. An oligodeoxyribonucleotide bearing a photoluminescent europium(III) chelate, {2,2‘,2‘ ‘,2‘ ‘‘-{{4‘-{4‘ ‘‘-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]phenyl}-2,2‘:6‘,2‘ ‘-terpyridine-6,6‘ ‘-diyl}bis(methylenenitrilo)}tetrakis(acetato)}europium(III), was hybridized to a complementary sequence of the target oligonucleotide, and the resulting duplex was further hybridized to the particle-bound probes. The latter binding was quantified by time-resolved measurement of the emission signal of a single particle. Kinetics of hybridization and the effect of the concentration of the target oligomer and the fluorescently tagged probe on the efficiency of hybridization were studied. The intensity of the emission signal was linearly related to the concentration of the target oligomer over a range of 5 orders of magnitude. The length of the complementary region between the target oligomer and the particle-bound probe was varied, and the effect of point mutations and deletions on the hybridization efficiency was determined in each case. The maximal selectivity was observed with 10−16-base pair complementary sequences, the optimal length depending on the oligonucleotide loading on the particle. Discrimination between the complete matches and point mismatches was unequivocal, a single point mutation and/or deletion decreasing the efficiency of hybridization by more than 2 orders of magnitude." @default.
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- W1964439167 date "1998-04-16" @default.
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- W1964439167 title "Detection of Oligonucleotide Hybridization on a Single Microparticle by Time-Resolved Fluorometry: Quantitation and Optimization of a Sandwich Type Assay" @default.
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- W1964439167 doi "https://doi.org/10.1021/bc9701860" @default.
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