Method for detecting a target substance
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United States of America Patent
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app pub date -
Jun 29, 2006
filing date -
Dec 29, 2003
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Abandoned
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Abstract
In order to separate a complex of a first probe, a second probe and a target substance from a reaction mixture obtained by reacting the first probe having first particle (such as labeled particle) and a first binding substance (such as a first oligonucleotide) immobilized on the first particle, the second probe having second particle (such as magnetic particle) and a second binding substance (such as a second oligonucleotide) immobilized on the second particle, and the target substance (such as a target nucleic acid) under mild conditions which do not cause destruction or degradation of the complex, the reaction mixture is mixed with a liquid having a specific gravity greater than that of the first particle, less than that of the second particle and less than that of a particle complex composed of the first particle and the second particle, or a liquid having a specific gravity less than that of the first particle, greater than that of the second particle and greater than that of a particle complex composed of the first particle and the second particle, and then allowed to stand undisturbed until a precipitate and a floating substance are formed.
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