38 results about "Large-Scale Sequencing" patented technology

The invention relates to a non-diagnostic method for noninvasively detecting fetal hereditary disorder by sequencing nucleotides from a maternal biological sample on a large scale, and further provides a method for eliminating sequencing result GC bias caused by chromosome GC content difference. The method disclosed by the invention not only enables detection to be more accurate, but also provides a non-diagnostic comprehensive method for detecting fatal aneuploidy including sex chromosomal disease cases, for example, XO, XXX, XXY, XYY, and the like.

The invention relates to the field of molecular biology and genome breeding, and particularly discloses a corn whole genome SNP chip and application thereof. SNP loci covering a genetic expression area and SNP loci which are uniformly distributed in the whole genome are collected, after sifting, a high-throughput Infinium SNP chip of Illumina is prepared, and the chip comprises 500 probes of SNP markers shown in a detection list 1. By means of the selected SNP loci based on a large-scale sequencing result, specific signals which have reasonable frequency distribution, a low miss rate and low false positives are obtained, wherein 2/3 SNP loci are distributed in all the corn warm zone and tropical zone materials, and can be effectively used for selecting and utilizing the tropical zone materials; 426 SNP loci are functional markers, and are obviously relevant to kernel substance accumulation gene expression; an Infinium platform of Illumina has the advantages of being high in SNP typingdetection rate, high in repetitive rate, simple in detection and high in accuracy. The corn whole genome SNP chip can be used for corn germplasm resource molecular marker fingerprint analysis, corn linkage map construction, QTL locating, corn breeding material background selection and the like.

The invention discloses a cancer detection kit based on large-scale mining and a detection method, and belongs to the technical field of biomedical detection. The kit comprises a DNA extraction reagent, a high-throughput sequencing library preparation reagent, gene sequence alignment software and chromosome cover degree calculation software. The method comprises the steps that firstly, peripheral blood is collected from a subject and plasma is separated out; DNA polymerase is used for amplification and a sequencing library is prepared; large-scale sequencing is performed on the prepared library; sequence alignment is performed on a sequencing result, statistic is performed on the distribution situation on a genome, and whether a cancer cell genomic sequence from tumor tissue exists or not is judged, so that whether a detection object carries a cancer or not is judged. According to the cancer detection kit and the detection method, the defect that existing cancer screening specificity and sensitivity are poor is overcome, the method causes no irradiation or wounds, and cancer detection can be achieved only through 4-10 mL of peripheral blood.

A nucleic acid sequencing method based on fluorescence quenching is: 1) preparing a sequencing template: the nucleic acid fragments to be sequenced, where the nucleic acid fragments include deoxyribonucleic acid, ribonucleic acid or their nucleic acid sequence amplification products, cloned products, and The product is immobilized on the carrier, 2) On-chip extension: Extend with reaction buffer, polymerase and fluorescently labeled dNTP mixture, 3) Fluorescence quenching: Use a fluorescent quencher to quench the fluorescence, 4) On-chip Extension: use reaction buffer, polymerase and fluorescently labeled dNTP mixture to extend, 5) Image recognition: use Matlab to extract feature points from the obtained extended image, remove noise points to achieve chip analysis or other commercial The optimized software directly processes the image. The invention combines nucleic acid microarray chip technology, and can perform large-scale sequencing of nucleic acids with high throughput, rapidity and low cost.

Chinese amphioxus galactose agglutinin AmphiGAL13 gene and its production are disclosed. The process is carried out by constructing cDNA library, large-scaled sequencing, and separating out AmphiGAL13 gene from digestive tube of Chinese amphioxus. It expresses recombinant amphioxus GST-PGAL13 protein by GST fusion and obtains agglutinin by EK enzyme digestion. It can be used to develop and research for natural small molecule biological granular preparation.

The invention discloses a sequencing data compression method based on a duplex codon. The sequencing data compression method comprises the following steps of (1) cutting; (2) establishing of a hash table; (3) ordering; (4) establishing of a Huffman tree; (5) coding; and (6) calculation of the compression ratio, wherein the compression ratio of the algorithm is 8M/L. Space occupation of sequencing data is greatly reduced so that the sequencing data compression method plays a key role in storage and transmission of the large-scale sequencing data, and transmission time of local and cloud-side data can be saved.

A centrosome located gene cep is disclosed, which is prepared through sequencing, biological information analysis, and gene technique. It can be used as the candidate gene for treating the diseases is hemopoietic system and the generation and transfer of tumor, or as the target point of genetically engineered medicine.

The invention relates to a method for identifying the type and site of a RNA binding with protein in a plant. The method mainly comprises the following steps: immobilizing the in-vivo binding state of protein and nucleic acid through ultraviolet crosslinking; subjecting immunoprecipitated RNAs to digestion with nuclease into small fragments; removing non-specifically bound RNAs by using SDS-PAGE and transferring methods; and carrying out reverse-transcription PCR amplification and large-scale sequencing by using adaptors connected with two ends of the RNA. The method has the advantages that 1) ultraviolet crosslinking is carried out in vivo, so real in-vivo binding conditions can be reflected; 2) since a covalent bond formed by ultraviolet crosslinking is irreversible, the length of nucleic acid binding with protein can be reduced through digestion by nuclease, and subsequent multi-step purification can greatly improve a ratio of signal to noise; 3) most non-specifically bound RNAs in a precipitation sample are removed through SDS-PAGE separation and subsequent transferring process removes free RNAs; and 4) the two ends of the RNA are connected with the adaptors, which makes subsequent PCR amplification and large-scale sequencing to be possible.

Identifying proteins and peptides, and more specifically large-scale sequencing of single peptides in a mixture of diverse peptides at the single molecule level is an unmet challenge in the field of protein sequencing. Herein are methods for identifying amino acids in peptides, including peptides comprising unnatural amino acids. In one embodiment, the N-terminal amino acid is labeled with a first label and an internal amino acid is labeled with a second label. In some embodiments, the labels are fluorescent labels. In other embodiments, the internal amino acid is Lysine. In other embodiments, amino acids in peptides are identified based on the fluorescent signature for each peptide at the single molecule level.

The invention discloses a DNA (deoxyribonucleic acid) sequencing method based on micro emulsion isothermal amplification on a biochip. The method comprises the following steps of: firstly, modifying the surface of a slide, performing corresponding aldehyde group, amino group or streptavidin modification on a DNA fragment to be detected; then amplifying the mixture of the modified DNA fragment to be detected and T7gp4 primase in a micro emulsion; then fixing the amplified product to the modified slide for providing a template for sequencing; and finally, performing on-chip extension sequencingon the template fixed to a biochip. In the invention, micro emulsion isothermal amplification and biochip technology are combined, so that large-scale sequencing can be performed on DNA quickly with high flux and high sensitivity.

The invention provides a primer sequence for detecting a tetracycline resistant gene tetO in a water body and sediments in a classified mode and a corresponding detecting method for detecting the tetracycline resistant gene tetO in the water body and the sediments through the primer sequence. The primer sequence comprises a tetO-F, a tetO-R and a tetO-F-GC. The PCR amplification and denaturing gradient gel electrophoresis technology are conducted through the primer sequence, and then the aim of detecting the tetO sequence in the classified mode is achieved. By designing a primer and applying the PCR-DGGE technology to the classified identification of the tetO sequence, the steps, highly consuming labor, time and expenses, of the separation and purification of DNA, the connection and conversion of carriers, the screening of positive clone, the large-scale sequencing of sequences and the like are omitted compared with a traditional method, the comprehensive tetO sequence information in a sample can be obtained, the whole operation becomes easy and rapid, and cost is saved.

The invention discloses a multiple cancer risk susceptibility mutation site, an application thereof and a produced kit thereof. The research verifies that a multiple cancer family chromosome 3q24-26 area is tightly linked with a disease site, gene mutation screening verifies that ATG upstream-91bp of human TSC22D2 gene T>C mutation (c.-91T>C) is co-separated from pathotype in a multiple cancer family, According to large scale sequencing verification in local normal population, the mutation is negative. The genotype provides that the mutation site can be used for screening the tumor heredity susceptible population and predicting the prevalence risk of tumor. The invention also provides a kit for screening the relative mutation. The kit has the advantages of high sensitivity, good specificity, high flux and the like. Compared with the traditional sequencing method, a PCR product is not required for purifying, and the method is capable of minimizing the interference of artificial factors like cross-contamination, simultaneously the labor resources, the financial resources and the material resources can be saved.

The invention discloses a male infertility related genetic marker, the sequence of which is that of the UBE2B gene. The binding site of the UBE2B gene's promoter region and the transcription factor SP1 undergoes mutation, and the mutation site is one or more of Chr.133706771T>A, Chr.133706876T>G and Chr.133706925A>G. By large-scale sequencing, four new mutation sites of the UBE2B gene's promoter region are selected from male infertility patients, a transcription factor plasmid is cotransfected into cells together with a wild type plasmid and a mutant plasmid respectively, and experiments find significant function differences and show that mutation of the UBE2B gene's promoter region is relevant to male infertility (especially azoospermia). Therefore, diagnosis detection of male infertility can be realized through the mutation.

The invention belongs to the technical field of genetic engineering high-throughput sequencing, and discloses a 16S rDNA library construction method, a 16S rDNA library and application, and the 16S rDNA library construction method comprises the following steps: repairing the tail end of a DNA fragment; specific joint connection; and carrying out PCR amplification. According to the 16S rDNA library construction method provided by the invention, the cost can be greatly reduced by a next-generation sequencing technology represented by illumina, and the 16S rDNA library construction method is suitable for large-scale sequencing. The essence of 16S rDNA library establishment is to perform PCR enrichment and screening on a specific region by using enzyme and primers, and the library establishment method is lower in cost compared with methods such as a machine interruption method and the like. The 16S rDNA not only can reflect the difference between different bacteria genus, but also can easily obtain the sequence by utilizing a sequencing technology, and is widely applied to detection and identification of pathogenic bacteria at present. According to the 16SrDNA library building method disclosed by the invention, a library building system is obtained after multiple experiments, so that the library building time and cost can be effectively saved.