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Abstract

Compositions are described for detecting binding of an analyte to a binding partner attached to a nucleic acid hybridization switch probe that includes first and second arm sequences and a support sequence that is at least partially complementary to both arm sequences, allowing the probe under hybridization conditions to form a first conformation in the absence of the analyte and to form a second conformation in the presence of the analyte, and a label associated with the probe that produces a signal that indicates the conformation of the probe. Methods are described for detecting an analyte that forms a specific binding pair with the binding partner attached to the hybridization switch probe, thereby changing the probe from a first to a second conformation that results in a detectable signal that indicates the presence of the analyte in the sample.

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First Claim