A method of nucleic acid amplification involving using a first modified primer which provides protection to the amplification product from exonuclease degradation and a second primer. The method provides a double stranded nucleic acid, one strand of which is degraded by a double strand nucleic acid specific exonuclease to form a single stranded nucleic acid, which is protected from exonuclease degradation.

The present disclosure provides compositions and methods that employ the compositions for conducting pairwise sequencing and for generating concatemer template molecules for pairwise sequencing. The concatemers can be generated using a rolling circle amplification reaction which is conducted either on-support, or conducted in-solution and then distributed onto a support. The rolling circle amplification reaction generates concatemers containing tandem copies of a sequence of interest and at least one universal adaptor sequence. An increase in the number of tandem copies in a given concatemer increases the number of sites along the concatemer for hybridizing to multiple sequencing primers which serve as multiple initiation sites for polymerase-catalyzed sequencing reactions. When the sequencing reaction employs detectably labeled nucleotides and/or detectably labeled multivalent molecules (e.g., having nucleotide units), the signals emitted by the nucleotides or nucleotide units that participate in the parallel sequencing reactions along the concatemer yields an increased signal intensity for each concatemer.

The present disclosure provides compositions and methods that employ the compositions for conducting pairwise sequencing and for generating concatemer template molecules for pairwise sequencing. The concatemers can be generated using a rolling circle amplification reaction which is conducted either on-support, or conducted in-solution and then distributed onto a support. The rolling circle amplification reaction generates concatemers containing tandem copies of a sequence of interest and at least one universal adaptor sequence. An increase in the number of tandem copies in a given concatemer increases the number of sites along the concatemer for hybridizing to multiple sequencing primers which serve as multiple initiation sites for polymerase-catalyzed sequencing reactions. When the sequencing reaction employs detectably labeled nucleotides and/or detectably labeled multivalent molecules (e.g., having nucleotide units), the signals emitted by the nucleotides or nucleotide units that participate in the parallel sequencing reactions along the concatemer yields an increased signal intensity for each concatemer.

This disclosure relates to compositions and methods for amplifying and identifying a target nucleic acid of interest from a population of non-target nucleic acids. In particular, this disclosure provides compositions and methods for identifying a target sequence from a single known adjacent sequence. This disclosure provides compositions and methods useful for identifying rare sequence variants, gene fusions, and for enriching and identifying nucleic acid whose target region of interest and its barcode for single-cell tracing are located on distant portions of a molecule.

This disclosure relates to compositions and methods for amplifying and identifying a target nucleic acid of interest from a population of non-target nucleic acids. In particular, this disclosure provides compositions and methods for identifying a target sequence from a single known adjacent sequence. This disclosure provides compositions and methods useful for identifying rare sequence variants, gene fusions, and for enriching and identifying nucleic acid whose target region of interest and its barcode for single-cell tracing are located on distant portions of a molecule.

This disclosure provides oligomers, compositions, and kits for detecting and quantifying Hepatitis C virus (HCV), including different genotypes and variants thereof, and related methods and uses. In some embodiments, oligomers target the 5′ untranslated region of HCV and are configured to provide substantially equivalent quantification of different genotypes and variants of HCV.

A method of detection of nucleic acids from a biological sample without isolation or purification of the nucleic acids is described. The method may include direct detection of nucleic acids from humans, animals, viruses or bacteria, including DNA and RNA from a biological sample without isolating or purifying nucleic acids prior to analysis. Biological samples may be blood, urine, semen, tissue, swabs (nasal, buccal, ocular, vaginal or anal).

A method of detection of nucleic acids from a biological sample without isolation or purification of the nucleic acids is described. The method may include direct detection of nucleic acids from humans, animals, viruses or bacteria, including DNA and RNA from a biological sample without isolating or purifying nucleic acids prior to analysis. Biological samples may be blood, urine, semen, tissue, swabs (nasal, buccal, ocular, vaginal or anal).

Embodiments of the present disclosure relate to compositions and kits for use in sequencing by synthesis to improve fluorescent signal intensity and reduce signal decay caused by short wavelength light source during the imaging events. Methods of sequencing using the compositions and kits described herein are also provided.

Embodiments of the present disclosure relate to compositions and kits for use in sequencing by synthesis to improve fluorescent signal intensity and reduce signal decay caused by short wavelength light source during the imaging events. Methods of sequencing using the compositions and kits described herein are also provided.