| 摘要 |
The present teachings are directed to compositions, methods, and kits for detecting and quantitating small nucleic acid molecules, including small DNA molecules and small RNA molecules. The detector probes of the current teachings, including single-loop detector probes, double-loop detector probes, and bimolecular detector probes, are designed to selectively hybridize with a corresponding small nucleic acid target and to produce, under appropriate conditions, a detectable signal or a detectably different signal. The detector complexes of the current teachings comprise a detector probe comprising a first reporter group and a displaceable sequence comprising a second reporter group, wherein the displaceable sequence is hybridized to the detector probe. According to certain methods, detecting a small nucleic acid target comprises the target displacing the displaceable sequence of a detector complex to form a detector probe-small nucleic acid target duplex, illuminating the duplex with light of an appropriate wavelength, and determining the presence of a detectable fluorescent signal or the change in a detectable signal.
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