摘要:
Disclosed is a method for simultaneously detecting a large number of mutations of different target genes with high specificity and sensitivity. It exploits single-molecule clonal amplification techniques, a hybridization-based decoding technique and a primer extension-based detection method to enable simultaneous measurement of hundreds and thousands of mutation DNAs in a sample. Also disclosed is a method for detecting copy number variation with high sensitivity and accuracy. The invention provides a method for efficiently and accurately counting thousands and millions of sequences from a plurality of target regions, enabling detection of copy number variation at the whole genome, the whole chromosome, sub-chromosomes or single gene level.
摘要:
Proximity coupling and sequencing methods to screen identify, validate and/or characterize interactions between analytes and binding moieties are disclosed. Also disclosed herein are proximity coupling methods and sequencing methods to determine or quantify levels of target analytes. The disclosed methods can be multiplexed in two dimensions, and can be used to determine the affinity and specificity of each of a plurality of binding moieties for each of a plurality of target analytes. Also disclosed herein are substrates, arrays, and reagents for use in the methods, and methods of their preparation.
摘要:
Methods of generating a nucleic acid signature for identifying particles associated in a partition are provided. In one aspect, the method comprises: partitioning a sample into a plurality of partitions comprising a particle comprising a solid support surface, the solid support surface having a plurality of oligonucleotide primers conjugated thereon, wherein the oligonucleotide primers comprise a barcode sequence, and wherein the partitions have 0, 1, or more than 1 particles per partition; providing in a partition a substrate comprising a barcode sequence or repeating clonal barcode sequences; and in the partition, associating a first particle conjugated to oligonucleotide primers comprising a first barcode sequence and a second particle conjugated to oligonucleotide primers comprising a second barcode sequence to a barcode sequence from the substrate, thereby generating a nucleic acid signature for the particles in the partition.
摘要:
Presented are methods and compositions for spatial detection and analysis of nucleic acids in a tissue sample. The methods can enable the characterization of transcriptomes and/or genomic variations in tissues while preserving spatial information about the tissue.
摘要:
The present disclosure provides a polymer array comprising a plurality of polymers, each of which is immobilized at a distinct locations and differs from adjacent polymers by one and only one subunit. Also provided herein are methods for generating a set of masks which may define strings of synthetic steps for forming polymer arrays on a substrate.
摘要:
The present invention provides compositions, methods, and kits for inserting a plurality of synthetic transposons each comprising a different nucleic acid sequence (i.e., molecular barcode) in a target nucleic acid of interest to allow extraction of contiguity information in the target nucleic acid. The molecular barcodes are also useful for reducing amplification or sequencing bias and errors, and for guiding accurate sequence assembly of the target nucleic acid from sequencing reads. The compositions, methods, and kits described herein have many applications, including haplotyping, genome assembly, sequencing of repetitive regions, detection of structural variations and copy number variations, chromosomal conformation analysis, and methylation analysis.
摘要:
The disclosed embodiments concern methods, apparatus, systems and computer program products for determining sequences of interest using unique molecular index (UMI) sequences that are uniquely associable with individual polynucleotide fragments, including sequences with low allele frequencies and long sequence length. In some implementations, the UMIs include both physical (exogenous) UMIs, e.g. introduced using Y-shaped adaptors, and virtual (endogenous) UMIs present in the DNA fragments to be sequenced. In some implementations, the unique molecular index sequences include non-random sequences. System, apparatus, and computer program products are also provided for determining a sequence of interest implementing the methods disclosed.
摘要:
The invention discloses diagnostic techniques based on single cell genomics, consisting of obtaining a blood sample, enriching a sub-population of cells present in the blood sample, sequestering individual cells or group of cells from the blood sample, obtaining sequencing data from the sequestered cells or group of cells, using genetic variant information to determine the provenance of the cells, and genetically analyzing the cells of the correct provenance to provide a diagnostic readout. Using the cell-based testing techniques of the invention, the number of false positives is greatly reduced when compared to cell-free DNA (cfDNA) based traditional testing techniques. The invention may be effectively employed for non-invasive prenatal (NIPT) diagnostics, oncological testing and other diagnostic procedures.
摘要:
The disclosure provides methods and compositions useful for labeling of target molecules with origin-specific nucleic acid identifiers (for example, barcodes), which can be used subsequently to identify, quantify, or otherwise characterize a feature or activity of target molecules originating from a particular discreet volume. Such target molecules can include polypeptides expressed by cells, in which nucleic acid molecules encoding the polypeptides are labeled with the same, or matched, origin-specific nucleic acid identifiers.