Methods for detecting polynucleotides, especially the DNA replicated from samples obtained from subjects infected with pathogenic viruses such as human immunodeficiency virus, by detecting electromagnetic signals (“EMS”) emitted by such polynucleotides, and methods for improving the sensitivity of the polymerase chain reaction (“PCR”).

Methods for detecting polynucleotides, especially the DNA replicated from samples obtained from subjects infected with pathogenic viruses such as human immunodeficiency virus, by detecting electromagnetic signals (“EMS”) emitted by such polynucleotides, and methods for improving the sensitivity of the polymerase chain reaction (“PCR”).

Provided herein are compositions and methods for detecting nucleic acids. Further provided are methods using Primary Template-Directed Amplification (PTA) to detect trace nucleic acids. Such methods in some instances are applied to diagnostics, biotechnology and pharmaceutical manufacturing, and food safety.

Provided herein are compositions and methods for detecting nucleic acids. Further provided are methods using Primary Template-Directed Amplification (PTA) to detect trace nucleic acids. Such methods in some instances are applied to diagnostics, biotechnology and pharmaceutical manufacturing, and food safety.

This disclosure provides for devices, methods, and systems for performing a non-invasive prenatal testing (NIPT) digital assay upon generating at least a large number of counts per chromosome for a set of chromosomes present in a sample, where performing the NIPT digital assay can include: distributing nucleic acids of the sample and materials for an amplification reaction across a plurality of partitions; amplifying the nucleic acids with the materials, within the plurality of partitions; and generating counts per chromosome upon detecting signals from the plurality of partitions. The inventions enable processing of samples for NIPT digital analyses and/or other digital analyses involving other loci of interest, with unprecedented partitioning, reaction, readout, and analytical performance.

The present invention provides a method of detecting multiple analytes in a sample, wherein said analytes have varying levels of abundance in the sample, said method comprising: (i) providing multiple aliquots from the sample; and (ii) in each aliquot, detecting a different subset of the analytes by performing a separate multiplex assay for each aliquot, wherein the analytes in each subset are selected based on their predicted abundance in the sample.

The present invention provides a method of detecting multiple analytes in a sample, wherein said analytes have varying levels of abundance in the sample, said method comprising: (i) providing multiple aliquots from the sample; and (ii) in each aliquot, detecting a different subset of the analytes by performing a separate multiplex assay for each aliquot, wherein the analytes in each subset are selected based on their predicted abundance in the sample.

Embodiments of the present disclosure relate to method of preparing a substrate for sequencing by synthesis, including capturing library DNA to the surface using a low salt buffer solution prior to grafting primer oligonucleotides. Substrates prepared by the method described herein have increased monoclonality of clusters and sequencing by synthesis using the substrate prepared by the method are also described.

Embodiments of the present disclosure relate to method of preparing a substrate for sequencing by synthesis, including capturing library DNA to the surface using a low salt buffer solution prior to grafting primer oligonucleotides. Substrates prepared by the method described herein have increased monoclonality of clusters and sequencing by synthesis using the substrate prepared by the method are also described.

Provided herein is technology relating to the amplification-based detection of bisulfite-treated DNAs and particularly, but not exclusively, to methods and compositions for multiplex amplification of low-level sample DNA prior to further characterization of the sample DNA. The technology further provides methods for isolating DNA from blood or blood product samples, e.g., plasma samples.