This disclosure relates to recognition moieties, biosensors, biosensor systems and kits thereof, and the methods for their use in detecting a target nucleic acid molecule in a test sample, including viral RNA and methods for determining whether a subject has a viral infection. The methods disclosed herein include detecting a viral infection in a subject comprising testing a sample from the subject for the presence of a target nucleic acid using a biosensor system, wherein presence of a target nucleic acid indicates that the subject has a viral infection.

The present invention provides modified oligonucleotides and methods for their use in the detection of nucleic acids. The oligonucleotides and methods find particular application in amplifying and/or detecting areas of genetic variation in target nucleic acid sequences.

The present invention provides modified oligonucleotides and methods for their use in the detection of nucleic acids. The oligonucleotides and methods find particular application in amplifying and/or detecting areas of genetic variation in target nucleic acid sequences.

Embodiments of this invention are directed towards the sensitive, fast, and accurate identification and/or characterization of a single cell or bacterium, particularly phenotypic characterization. Certain aspects of the invention include assays that include functional nucleic acid probes (FNAPs). FNAPs can be used to generate deoxyribozyme cleavage cascades (DRCC) initiated by activation of a FNAP resulting in a detectable signal from a single cell.

Embodiments of this invention are directed towards the sensitive, fast, and accurate identification and/or characterization of a single cell or bacterium, particularly phenotypic characterization. Certain aspects of the invention include assays that include functional nucleic acid probes (FNAPs). FNAPs can be used to generate deoxyribozyme cleavage cascades (DRCC) initiated by activation of a FNAP resulting in a detectable signal from a single cell.

Methods, devices, and kits for performing rapid, highly sensitive, high throughput, accurate, and flexible detection and quantification of nucleic acids based on highly optimized rolling circle amplification are provided. The methods, devices, and kits can be used to detect and track an emergent virus or other pathogen, including SARS-CoV-2, to test and diagnose individual patients with respect to a specific pathogen or disease, including COVID-19, and to detect and analyze cellular nucleic acids. The methods and devices also can be used to detect fragments and variants of DNA or RNA, including those present in cancer cells. The methods, devices, and kits are suitable for use in both high throughput screening carried out in centralized testing laboratories and in point-of-care testing devices used in the field, at home, in the workplace, or at public facilities for rapid detection and diagnosis.

Methods, devices, and kits for performing rapid, highly sensitive, high throughput, accurate, and flexible detection and quantification of nucleic acids based on highly optimized rolling circle amplification are provided. The methods, devices, and kits can be used to detect and track an emergent virus or other pathogen, including SARS-CoV-2, to test and diagnose individual patients with respect to a specific pathogen or disease, including COVID-19, and to detect and analyze cellular nucleic acids. The methods and devices also can be used to detect fragments and variants of DNA or RNA, including those present in cancer cells. The methods, devices, and kits are suitable for use in both high throughput screening carried out in centralized testing laboratories and in point-of-care testing devices used in the field, at home, in the workplace, or at public facilities for rapid detection and diagnosis.

This invention provides for processes for creating a long DNA molecule that is a concatamer that comprises a repeating oligonucleotide segment, wherein one or more of the nucleotides of said segment has one or more independently selected templating “non-standard” nucleotides. These are nucleotide analogs that, when incorporated into oligonucleotides (DNA or RNA, collectively xNA), present to a pattern of hydrogen bonds that is different from the pattern presented by adenine, guanine, cytosine, and uracil. This disclosure provides a process for obtaining these using rolling circle amplification.

This invention provides for processes for creating a long DNA molecule that is a concatamer that comprises a repeating oligonucleotide segment, wherein one or more of the nucleotides of said segment has one or more independently selected templating “non-standard” nucleotides. These are nucleotide analogs that, when incorporated into oligonucleotides (DNA or RNA, collectively xNA), present to a pattern of hydrogen bonds that is different from the pattern presented by adenine, guanine, cytosine, and uracil. This disclosure provides a process for obtaining these using rolling circle amplification.

This disclosure relates to biosensors, and in particular, biosensors based on nucleic acid cleaving enzymes such as ribonucleotide-cleaving DNAzymes for the detection of analytes, and methods of use.