31results about How to "High sequencing throughput" patented technology

The invention provides unique index sequences with a length of 7bp. The index sequences can be respectively imported into a DNA(deoxyribonucleic acid) index library through adapter link and PCR (polymerase chain reaction). The invention provides a method for building the DNA index library by using the index sequences based on a solexa sequencing platform of the current illumina company, and the method is applied to solexa DNA sequencing and has the effects on improving the preparation efficiency of the DNA index library, increasing the sequencing throughput of the DNA samples and lowering thesolexa sequencing cost of a single sample.

The invention designs 161 unique index sequences with a length of 8bp, and the indexes are embedded into DNA PCR (deoxyribonucleic acid polymerase chain reaction) primers to form DNA PCR index primers, thus being capable of importing the index sequences through PCR. The invention successfully establishes a method for building a DNA index library, and the method is applied to solexa DNA sequencing.

The invention provides a method and equipment for neoantigen epitope prediction. The method for neoantigen epitope prediction includes (1), building a candidate epitope library; (2), building a prediction model based on a historical database, and (3) taking at least one subset of the candidate epitope library as an input variable of the prediction model to predict neoantigen epitope. The candidate epitope library is composed of differential expression peptides which are peptides with difference between samples having predetermined state and samples having no predetermined state. The historical database is composed of known epitopes related with the predetermined state. By the method for neoantigen epitope prediction, antigen mutation information can be determined according to gene level and protein level really, neoantigen epitopes capable of being bound with MHC are acquired effectively rapidly, and binding capacity of neoantigen epitopes and NHC can be predicted precisely. Besides, the method is easy and convenient and capable of saving manpower and material resources greatly.

The invention relates to the field of genetic engineering, in particular to a gene sequencing device and a gene sequencing system. The gene sequencing device comprises a sample preparation component, a liquid conduction component, a sample loading component, a temperature control component, an image acquisition component and a control component. The gene sequencing system comprises a sample preparation control module, a liquid conduction control module, a reaction control module, a temperature control module, an image acquisition control module and a control module. By adopting the gene sequencing device and the gene sequencing system, the integration from sample preparation to data processing can be realized, and full automation of gene sequencing can also be realized. Meanwhile, the high-pass and low-cost gene sequencing can be realized.

According to the invention, based on a DNA (deoxyribonucleic acid) tag library preparation method provided by a solexa sequencing platform of the illumine corporation, a special tag sequence with length of 6 bp is designed, the tags are embedded into DNA adapters, and the DNA adapters are connected to introduce the tag sequence, thus a library construction method of a DNA tag library is successfully constructed, and the constructed DNA tag library can be applied to solexa DNA sequencing.

The invention relates to a method for constructing a bacterium 16S rDNA overall-length high-throughput sequencing library, and relates to the field of microorganism high-throughput sequencing. The method comprises the steps of firstly, adding unique molecular identifiers (UMIs) which are composed of random base groups to the two ends of each 16S rDNA template molecule, conducting PCR amplificationto obtain multiple copied 16S rDNA overall-length amplicons with two ends containing specific UMIs, randomly breaking and connecting joints of the sequencing library, and conducting paired-end sequencing to obtain the UMI sequences and corresponding 16S rDNA fragment sequences; besides, through cyclizing of the 16S rDNA overall-length amplicons and sequencing, obtaining UMI pairing information oftwo ends of the same molecule; conducting reads assembly according to the same UMI and pairing UMI information to increase the splicing length accordingly, and finally conducting assembly to obtain 16S rDNA overall-length sequence information. The method is low in cost, high in accuracy and suitable for high-throughput sequencing platforms; meanwhile, the method can effectively eliminate the influence of PCR amplification preferences, amplification errors and sequencing errors through the UMIs, and thus the bacterium population abundance in a sample is more precisely quantified.

The invention relates to the field of biochemical equipment and provides gene sequencing equipment, which comprises a sequencing reaction chamber and a temperature control component. The sequencing reaction chamber is used for fixing samples and performing sequencing reaction; the temperature control component is fixed in an area of the sequencing reaction chamber when the samples are fixed and used for controlling temperature of the sequencing reaction chamber. The temperature of the sequencing reaction chamber rises and decreases quickly by the temperature control component, and sequencing reaction efficiency is improved.

The invention relates to the field of biochemical equipment, and provides a nucleic acid detection reaction platform. The nucleic acid detection reaction platform comprises a temperature control component, a control component and at least two sequencing reaction chambers, wherein the control component is used for adjusting set temperature to target temperature and controlling a sequencing reaction to reach the target temperature from the current temperature and further used for sending a target temperature instruction to the temperature control component; the temperature control component is used for heating or cooling the sequencing reaction according to the target temperature instruction of the control component, and measuring and feeding back the current temperature of the sequencing reaction in real time; and the sequencing reaction chamber is used for parallel sequencing. The invention further provides a nucleic acid detection system containing the nucleic acid detection reaction platform. The nucleic acid detection reaction platform and the nucleic acid detection system related by the invention can improve the quality of the sequencing reaction and further can improve the sequencing throughput.

The invention discloses a magnetic bead enrichment technique based method for high-flux development of genome SSR (simple sequence repeat) markers. The method comprises the steps of: (1) extracting target genome DNA; (2) subjecting the obtained genome DNA to random fragmentation; (3) constructing a genome random fragmented DNA library; (4) amplifying the DNA library; (5) utilizing a biotin labeled SSR probe to perform hybridization with a target fragment in the library; (6) carrying out streptavidin magnetic bead enrichment on the SSR sequence-containing DNA library fragments; (7) amplifying and purifying the enriched DNA library fragments; (8) subjecting the purified DNA fragments to emulsion PCR amplification and sequencing; and (9) searching sequences containing SSR loci in the obtained sequences. The method reduces the library construction difficulty, shortens the experimental period, improves the sequencing flux, lowers the sequencing cost, and can be widely used as an effective method for high-flux development of various species SSR markers.

The invention relates to a method for linking monomolecular DNA to a single magnetic bead, belonging to the technical field of biology and comprising the following steps: performing fluorescence labeling to DNA, then labeling biotin at the end 3' of the DNA and labeling digoxin at the end 5' of the DNA; or labeling digoxin at the end 3' of the DNA and labeling biotin at the end 5' of the DNA; placing the DNA on glass to carry out an immunoreaction and washing the DNA by running water; carrying out the immunoreaction again; adding DNA endonuclease to the periphery of magnetic beads, after DNA molecules are degraded, collecting magnetic beads carrying DNA fragments one by one by a micro-gunpoint and placing the magnetic beads on a magnet; and cutting target DNA by the endonuclease and linking target DNA fragments with the DNA fragments on the magnetic beads under the action of ligase. The method for linking the monomolecular DNA to the single magnetic bead can acquire the sequence information of target fragments and realize the monomolecular sequencing of the DNA; and when nano-pores are produced into an array to be matched with a decoy array, sequencing throughput can be improved.

The invention discloses DNA tags, a PCR primer and application thereof. The DNA tags of one group are chosen from nucleotides shown as in SEQ ID NO:1-95 and can be used for building a nucleic acid sequencing library to accurately differentiate the nucleic acid sequencing library. The DNA tags and the PCR primer are utilized to build a tagged PCR primer, and by utilizing the tagged PCR primer, STR detection of at most 95 DNA samples can be realized at one step according to a method for determining preset STR gene locus genotype of various DNA samples.

The invention discloses a gene sequencing method capable of increasing the signal-to-noise ratio by detecting pyrophosphoric acid charges. According to the method, by adding dNTP, polymerases and catalysts to a reaction system, pyrophosphoric acid is released through base pairing, pyrophosphoric acid is hydrolyzed to generate hydrogen phosphate ions, and the hydrogen phosphate ions are combined with sensor surface receptors to generate electrical signals which are further translated into corresponding bases. Pyrophosphoric acid generated during amplification can be detected, the diffusion rate of pyrophosphoric acid is much slower than that of hydrogen ions because the relative molecular mass of pyrophosphoric acid is 174, electrical signals which can be detected last for a long time, and accuracy can be effectively improved. Besides, pyrophosphoric acid has four positive charges, diffusion is slowed down, effective surface concentration is high, the converted electric signals are strong, and the detected signal-to-noise ratio is high. The high signal-to-noise ratio allows the use of smaller sensors and a sensor array with higher density and larger scale, so that sequencing throughput can be further improved and sequencing cost can be reduced.

The invention provides a sebastiscus marmoratus gene screening and mining method based on a simplified genome sequencing technology, and belongs to the technical field of molecular marker development. The method comprises steps as follows: genome DNA extraction; genome DNA double digestion; linkage connection; PCR (polymerase chain reaction) amplification; sequence fragment recovery and high-throughput sequencing; data analysis and screening and gene locus mining. According to the method, extracted DNA has higher quality, enzyme cleavage rate is effectively increased, primer design difficulty is reduced, recovered fragments have more uniform size, the sequencing amount is larger, and a sequencing result is more accurate; areas such as a high-repetition area and the like with relatively higher methylation degree can be avoided, so that enzyme cleavage fragments with more specific sequences are collected, and marking effectiveness of SNPs (single nucleotide polymorphisms) for following identification is higher; obtained nucleic acid molecules have quite low preference and high complexity, and therefore, the maximum gene coverage is obtained with the least sequencing data during sequencing.

In the invention, a unique index sequence (index1-12) is designed aiming at a digital gene expression profiling (DGE) library sample building method based on a Solexa Single End sequencing platform provided by the current illumina company, and indexes are embedded in a 3' adapter in a DGE library by adapters, thus successfully establishing a DGE index library building method. The method is suitable for building the DGE index library of any eukaryote RNA sample and is successfully used for solexa sequencing, thus not only increasing the sequencing throughput of the DGE samples but also lowering the cost of solexa aiming at DGE sequencing.

The invention relates to the technical field of biology, in particular to a Dystrophin gene detection probe, a kit and a method. The invention also relates to a design method of the probe. The primerand the kit provided by the invention can be combined with a three-generation sequencing method to effectively sequence the human Dystrophin gene and analyze mutation in the human Dystrophin gene.

The invention relates to a construction method and application of a sequencing library of circular small non-coding RNA (Ribonucleic Acid). The construction method comprises the following steps: (1) culturing cells; (2) extracting total RNA (Ribonucleic Acid) from the cells; (3) extracting RNA by using a small RNA extraction kit, and removing 28S and 18S rRNA; (4) further removing 5S and 5.8 S rRNA by an RAP method; (5) removing linear RNA; and (6) constructing the sequencing library of the circular small non-coding RNA. The constructed sequencing library of the circular small non-coding RNA has the advantages of few rRNA residues, high detection efficiency of the circular RNA, high sequencing flux, better data repeatability and high success rate of verification of a sequencing result. The whole method is simple and convenient to operate, low in cost and time consumption, high in stability and very good in repeatability and reliability.

The invention discloses a novel tetracycline resistance gene tetX and application thereof. The nucleotide sequence of the novel tetracycline resistance gene tetX is as shown in SEQ ID NO: 1. According to the potential tetracycline resistance gene tetX found in the invention, a database of the tetracycline resistance gene is supplemented, help is provided for understanding the resistance mechanism of tetracycline, and theoretical support is also provided for subsequent tetracycline action target research.

The invention discloses a novel tet34 resistance gene of tetracycline and application of the novel tet34 resistance gene. The nucleotide sequence of the tetracycline novel tet34 resistance gene is as shown in SEQ ID NO: 1. According to the potential tetracycline resistance gene tet34 found in the application, a database of the tetracycline resistance gene is supplemented, help is provided for understanding the resistance mechanism of tetracycline, and a theoretical support is also provided for subsequent tetracycline action target research.

The invention belongs to the field of high-throughput sequencing, and discloses a three-color high-throughput sequencing reagent and a sequencing method. The method comprises the steps that corresponding to-be-labeled basic groups and proton sponge are obtained on the basis of sequencing requirements and stirred for multiple times under different temperatures and environments, and solids obtained through filtering are dissolved in water; a TEAB gradient is used as a negative ion exchange column to purify a solid dissolved in water, and then HPLC (High Performance Liquid Chromatography) is used for purifying to obtain a labeled basic group; the labeled basic group is cleaned and then subjected to fluorescence labeling determination, after determination is completed, a corresponding chemical reagent is used for splitting, sequencing of the current to-be-labeled basic group is completed after cleaning, the processes of reaction, cleaning, basic group reading, splitting and cleaning are circularly conducted on each sequencing process, the used three-color sequencing technology accelerates the sequencing speed like a two-color sequencing technology, base signals are not separately detected, and the sequencing length is not influenced and is increased, so that the sequencing efficiency and the sequencing flux are improved.