A method to recover an extracellular vesicle at a high efficiency, including (a) and (b): wherein (a) is mixing (i) an extracellular vesicle-containing sample, (ii) particles on which a substance having an affinity to extracellular vesicle membrane is immobilized, and (iii) a polymer to give a mixture solution containing (i′) target particles bound to the extracellular vesicle via the substance and (ii′) the polymer; and (b) separating the target particles from the mixture solution. The method further includes reducing a viscosity of the mixture solution between (a) and (b). A method for analyzing an extracellular vesicle. A kit having (a) a polymer, (b) a substance having an affinity to the extracellular vesicle membrane, and (c) an enzyme capable of degrading a polymer.

A method to recover an extracellular vesicle at a high efficiency, including (a) and (b): wherein (a) is mixing (i) an extracellular vesicle-containing sample, (ii) particles on which a substance having an affinity to extracellular vesicle membrane is immobilized, and (iii) a polymer to give a mixture solution containing (i′) target particles bound to the extracellular vesicle via the substance and (ii′) the polymer; and (b) separating the target particles from the mixture solution. The method further includes reducing a viscosity of the mixture solution between (a) and (b). A method for analyzing an extracellular vesicle. A kit having (a) a polymer, (b) a substance having an affinity to the extracellular vesicle membrane, and (c) an enzyme capable of degrading a polymer.

A method of conjugating a substrate includes exchanging a counter ion associated with a biomolecule with a lipophilic counter ion to form a biomolecule complex, dispersing the biomolecule complex in a nonaqueous solvent, and coupling the biomolecule complex to a substrate in the presence of the nonaqueous solvent.

A method of conjugating a substrate includes exchanging a counter ion associated with a biomolecule with a lipophilic counter ion to form a biomolecule complex, dispersing the biomolecule complex in a nonaqueous solvent, and coupling the biomolecule complex to a substrate in the presence of the nonaqueous solvent.

A composition for binding to human papillomavirus type 16 (HPV16)-positive tumor cells, the composition including a DNA aptamer. The DNA aptamer includes one of SEQ ID NO: 1 and SEQ ID NO: 2.

Provided herein is a method for biosensing a target substance [110] using a collection of particles [104] tethered to a surface [100] by tether molecules [102] and a plurality of capture molecules. A concentration of the target substance is determined from the time sequence of individual association/dissociation rates of the capture molecules. Competitive assay configurations are also described.

Provided herein is a method for biosensing a target substance [110] using a collection of particles [104] tethered to a surface [100] by tether molecules [102] and a plurality of capture molecules. A concentration of the target substance is determined from the time sequence of individual association/dissociation rates of the capture molecules. Competitive assay configurations are also described.

The invention relates to the technical field of nucleic acid detection and discloses a novel coronavirus nucleic acid rapid hybrid capture immunofluorescence detection kit, and a preparation method and a detection method thereof. The kit includes a COVID-19 reaction solution, wherein the COVID-19 reaction solution is prepared from a COVID-19 fluorescence marker and a COVID-19 probe solution; and the COVID-19 probe solution includes: an ORFlab section probe, an N section probe and an E section probe. Compared with general fluorescence PCR and sequencing detection, the kit has the advantages of stronger signal intensity, better specificity, shorter detection time, no need of professional technicians for operation, no need of refrigeration in transportation and storage, no need of a matched laboratory and a matched PCR instrument, and convenience and rapidness in use.

The invention relates to the technical field of nucleic acid detection and discloses a novel coronavirus nucleic acid rapid hybrid capture immunofluorescence detection kit, and a preparation method and a detection method thereof. The kit includes a COVID-19 reaction solution, wherein the COVID-19 reaction solution is prepared from a COVID-19 fluorescence marker and a COVID-19 probe solution; and the COVID-19 probe solution includes: an ORFlab section probe, an N section probe and an E section probe. Compared with general fluorescence PCR and sequencing detection, the kit has the advantages of stronger signal intensity, better specificity, shorter detection time, no need of professional technicians for operation, no need of refrigeration in transportation and storage, no need of a matched laboratory and a matched PCR instrument, and convenience and rapidness in use.

Provided are high throughput methods for physically linking cDNA molecules derived from mRNA molecules expressed by the same cell, and libraries of linked cDNA molecules produced by the methods. The methods comprise reverse transcribing mRNA from a single cell in a first container to produce cDNA molecules, and linking the cDNA molecules in a second container. The methods unexpectedly produced libraries of cDNA molecules with an increase in the number of molecules that are correctly linked to other molecules derived from the same cell.