There is provided a paper-based colorimetric sensor kit for quickly and simply diagnosing mercury in situ with a naked eye. The paper-based colorimetric sensor kit includes: a circular template for rolling circle amplification (RCA); a primer that does not hybridize to the circular template when a mercury ion is bonded to a primer that hybridizes to the circular template; a DNA polymerase; a sensing material kit including a nanoparticle probe labeled to a DNA coil formed in the circular template for RCA; and a radial chromatography paper.

There is provided a paper-based colorimetric sensor kit for quickly and simply diagnosing mercury in situ with a naked eye. The paper-based colorimetric sensor kit includes: a circular template for rolling circle amplification (RCA); a primer that does not hybridize to the circular template when a mercury ion is bonded to a primer that hybridizes to the circular template; a DNA polymerase; a sensing material kit including a nanoparticle probe labeled to a DNA coil formed in the circular template for RCA; and a radial chromatography paper.

The present disclosure in some aspects relates to methods and compositions for accurately detecting and quantifying analytes present at high levels, such as highly expressed genes in a sample. In some embodiments, a probe-resolution barcode sequence disclosed herein does not specifically correspond to any particular target analyte(s) but can be used to resolve dense optical signals due to spatially overlapping signals associated with different molecules of a target analyte, thereby enabling resolution of signals in a dense “spot” and accurate counting of spots associated with molecules that are in spatial proximity. Also provided are kits comprising probes for use in such methods.

The present disclosure in some aspects relates to methods and compositions for accurately detecting and quantifying analytes present at high levels, such as highly expressed genes in a sample. In some embodiments, a probe-resolution barcode sequence disclosed herein does not specifically correspond to any particular target analyte(s) but can be used to resolve dense optical signals due to spatially overlapping signals associated with different molecules of a target analyte, thereby enabling resolution of signals in a dense “spot” and accurate counting of spots associated with molecules that are in spatial proximity. Also provided are kits comprising probes for use in such methods.

The present disclosure relates in some aspects to methods for analyzing a target nucleic acid in a biological sample. In some aspects, the methods involve the use of a set of oligonucleotides, for example a set of two or more oligonucleotides, wherein one or more oligonucleotides comprises one or more photoreactive nucleotides, for analyzing target nucleic acids. In some aspects, the presence, amount, and/or identity of a target nucleic acid is analyzed in situ. Also provided are oligonucleotides, sets of oligonucleotides, compositions, and kits for use in accordance with the methods.

The present disclosure relates in some aspects to methods for analyzing a target nucleic acid in a biological sample. In some aspects, the methods involve the use of a set of oligonucleotides, for example a set of two or more oligonucleotides, wherein one or more oligonucleotides comprises one or more photoreactive nucleotides, for analyzing target nucleic acids. In some aspects, the presence, amount, and/or identity of a target nucleic acid is analyzed in situ. Also provided are oligonucleotides, sets of oligonucleotides, compositions, and kits for use in accordance with the methods.

Methods and systems are provided for massively parallel genetic analysis of single cells in emulsion droplets or reaction containers. Genetic loci of interest are targeted in a single cell using a set of probes, and a fusion complex is formed by molecular linkage and amplification techniques. Methods are provided for high-throughput, massively parallel analysis of the fusion complex in a single cell in a population of at least 10,000 cells. Also provided are methods for tracing genetic information back to a cell using barcode sequences.

Methods and systems are provided for massively parallel genetic analysis of single cells in emulsion droplets or reaction containers. Genetic loci of interest are targeted in a single cell using a set of probes, and a fusion complex is formed by molecular linkage and amplification techniques. Methods are provided for high-throughput, massively parallel analysis of the fusion complex in a single cell in a population of at least 10,000 cells. Also provided are methods for tracing genetic information back to a cell using barcode sequences.

The present invention relates to improved processes for production of closed linear deoxyribonucleic acid (DNA), in particular cell-free enzymatic production of closed linear DNA molecules, preferably using a closed linear DNA as a template for DNA synthesis. The invention further relates to a novel closed linear DNA species, suitable for use as a template in the improved processes for production of closed linear DNA. Further, the invention pertains to the intermediate products of the processes, since this enables the production of larger quantities of closed linear DNA from the template than with methods known in the art.

The present invention relates to improved processes for production of closed linear deoxyribonucleic acid (DNA), in particular cell-free enzymatic production of closed linear DNA molecules, preferably using a closed linear DNA as a template for DNA synthesis. The invention further relates to a novel closed linear DNA species, suitable for use as a template in the improved processes for production of closed linear DNA. Further, the invention pertains to the intermediate products of the processes, since this enables the production of larger quantities of closed linear DNA from the template than with methods known in the art.