Abstract: The present invention is directed to novel methods for in vitro and in vivo detection of target nucleic acid molecules, including DNA and RNA targets, as well as nucleic acid analogues. The present invention is based on protein complementation, in which two individual polypeptides are inactive. When the two inactive polypeptide fragment are brought in close proximity during hybridization to a target nucleic acid, they re-associate into an active, detectable protein.

Abstract: The present invention is directed to novel methods for in vitro and in vivo detection of target nucleic acid molecules, including DNA and RNA targets, as well as nucleic acid analogues. The present invention is based on protein complementation, in which two individual polypeptides are inactive. When the two inactive polypeptide fragment are brought in close proximity during hybridization to a target nucleic acid, they re-associate into an active, detectable protein.

Abstract: The present invention is directed to novel methods for in vitro and in vivo detection of target nucleic acid molecules, including DNA and RNA targets, as well as nucleic acid analogues. The present invention is based on protein complementation, in which two individual polypeptides are inactive. When the two inactive polypeptide fragment are brought in close proximity during hybridization to a target nucleic acid, they re-associate into an active, detectable protein.

Abstract: The present invention relates to a method to detect nucleic acid molecules, such as RNA molecules in vivo using real time protein complementation methods. The invention further relates to methods for detecting nucleic acids, for example RNA in real-time in living cells with a high sensitivity, using a novel split biomolecular conjugate of the invention.

Abstract: In general, the invention provides novel methods for generating, selecting, and displaying small molecules on the surface of a virus or cell. The viruses or cells expressing these small molecules may be assayed to select the small molecules that bind a target molecule.

Abstract: A stable complex, we refer to as a PD-Loop, between double stranded nucleic acid and a nucleobase polymer is assembled with the aid of strand invading peptide nucleic acid (PNA). The PD-Loop can be used in the detection, analysis, quantitation and even in the affinity capture of the duplex nucleic acid. Alternatively, the PD-Loop can be used to initiate polymerase extension of a primer to thereby facilitate sequencing of the double stranded nucleic acid even in the presence of large excesses of unrelated double stranded nucleic acid. As an additional feature, the PD-Loop can also be used to generate a construct comprised of a double stranded nucleic acid through which is threaded a single stranded dosed circular nucleic acid wherein the closed circular nucleic acid can be used in a signal amplification methodology.

Abstract: A stable complex, we refer to as a PD-Loop, between double stranded nucleic acid and a nucleobase polymer is assembled with the aid of strand invading peptide nucleic acid (PNA). The PD-Loop can be used in the detection, analysis, quantitation and even in the affinity capture of the duplex nucleic acid. Alternatively, the PD-Loop can be used to initiate polymerase extension of a primer to thereby facilitate sequencing of the double stranded nucleic acid even in the presence of large excesses of unrelated double stranded nucleic acid. As an additional feature, the PD-Loop can also be used to generate a construct comprised of a double stranded nucleic acid through which is threaded a single stranded dosed circular nucleic acid wherein the closed circular nucleic acid can be used in a signal amplification methodology.