331 results about "Pyrosequencing" patented technology

The present invention relates to the field of fluid dynamics. More specifically, this invention relates to methods and apparatus for conducting densely packed, independent chemical reactions in parallel in a substantially two-dimensional array. Accordingly, this invention also focuses on the use of this array for applications such as DNA sequencing, most preferably pyrosequencing, and DNA amplification.

The present invention provides a DNA base sequencing system having a compact, simple and convenient structure.

In one embodiment of the present invention, a reaction chamber module for pyrosequencing in which a multiple number of reaction vessels (reaction chambers) 10 and reagent-introducing narrow tubes 6 are integrated is formed in a device board 5. Reagents held in reagent reservoirs 1, 2, 3 and 4 mounted separately from this reaction chamber module are introduced into the reaction vessels 10 via reagent-introducing narrow tubes (capillaries) 6. The reagent-introducing narrow tubes (capillaries) 6 at the area of 2 cm from the reaction vessels 10 are structured with narrow capillaries having an inner diameter of about 0.1 mm and the conductance of these capillaries for the reagent solution determines the injection speed of the solution.

Using the present invention, many kinds of DNAs can be analyzed simultaneously.

The present disclosure generally pertains to a multiplex method for analyzing samples comprising using polynucleotide amplification to produce amplified products wherein one or more target sequences are tagged with a non-interfering, non-canceling target-specific polynucleotide identification tag, pyrosequencing the amplified products through the non-canceling target-specific polynucleotide identification tag sequence to detect the presence of one or more specific polynucleotide identification tags. The presence of a specific polynucleotide identification tag being correlated with the presence of a specific target sequence.

This invention provides methods for pyrosequencing and compositions comprising 3′-O— modified deoxynucleoside triphosphates.

The present invention relates to methods and apparatus for conducting an assay. In particular, the present invention relates to a rotatable platform which can be used for conducting an assay, in particular multi-step assays. The present invention provides a rotatable platform adapted to immobilise a first binding partner in one or more discrete areas on a surface of said platform, or to selectively immobilise a second binding partner in one or more discrete areas on a surface of said platform. The invention also relates to methods, apparatus, a kit and the use of the rotatable platform for conducting an assay. In particular, the invention has been developed primarily for use in sequencing nucleic acid by pyrosequencing, however the invention is not limited to this field.

The present invention relates to methods and apparatus for conducting nucleic acid sequencing. The method comprises the steps of providing a platform having at least one well for containing at least one support surface, and providing at least one support surface within each well, wherein the support surface is adapted to immobilise a first binding partner or selectively immobilise a second binding partner. The method further comprises the steps of binding or immobilising the first or second binding partner to the support surface and dispensing into each well from a point external of said platform a reagent, wherein after the dispensing step the platform is rotated sufficiently such that any residual or unreacted said reagent is substantially centrifugally removed from each well and/or each support surface, wherein during rotation each support surface is held within each well. The invention also relates to kits and uses of the kits for conducting nucleic acid sequencing. In particular, the invention has been developed primarily for use in sequencing nucleic acid by pyrosequencing, however the invention is not limited to this field.

The invention provides a sequencing primer for qualitative detection of cytochrome oxidase CYP2C19 genetic typing and a kit of the sequencing primer and belongs to the field of external nucleic acid detection. The kit comprises uracil DNA (Deoxyribonucleic Acid) glycosylase, Taq polymerase, PCR (Polymerase Chain Reaction) reaction liquor, PCR amplification primers, pyrophosphoric acid sequencing primers and positive control products. The kit is high in sensitivity and good in specificity, PCR products can be simply treated for a pyrophosphoric acid sequenator for sequencing, operation is simple, reaction time is short, the sensitivity of the kit is higher than that of a golden standard-capillary electrophoresis sequencing, and the kit is suitable for use for mutation analysis.

The invention discloses primers, method and kit for detecting secreted frizzled-related protein (SFRP)2 gene CpG island methylation. The primers include specific primers for amplifying deoxyribonucleic acid (DNA) segments of three CG loci (related to intestinal cancer) on an SFRP2 gene CpG island from a sample nucleic acid, and primers for pyrosequencing the obtained nucleic acid segments. By the primers, the method and the kit disclosed by the invention, the frequency of the SFRP2 gene methylation related to colorectal cancer susceptibility can be detected by adopting a pyrosequencing technique, so as to screen out susceptible people with early colorectal cancer. The primers, the method and the kit are good in specificity, and high in accuracy, and can detect samples at high flux.

The present invention relates to a method for high throughput nucleic acid sequencing using a multi-bead flow cell and pyrophosphate sequencing, a sequencer capable of performing this method, and a kit of the pyrophosphate sequencing reagents.

The present invention discloses a cucumber variety identification method based on single nucleotide polymorphism markers, wherein 12 single nucleotide polymorphism markers of cucumber are subjected to genotyping analysis by using a pyrosequencing technology so as to achieve authenticity identification on the cucumber variety. With the detection method of the present invention, the cucumber variety authenticity identification can be completed within 5 h, and characteristics of stability, high-throughput, accuracy and the like are provided.

The invention discloses a kit and method for detecting gene polymorphism of an irinotecan personalized medicine by a pyrophosphoric acid sequencing method. The kit is used for parting an irinotecan medicine gene, particularly single nucleotide polymorphism of UGT1A1*6 (rs4148323) and UGT1A1*28 (rs3064744). The kit comprises primers shown as SEQ ID NO. 3-8. According to the kit, accurate, quick and high-flux detection of the UGT1A1*6 (rs4148323) and the UGT1A1*28 (rs3064744) can be realized, so that individual administration for realizing safe, rational and effective irinotecan medicine is achieved.

The invention discloses a kit detecting hot spot mutation sites in a colorectal cancer PIK3CA gene. The kit comprises an erythrocyte lysate, a whole blood DNA extraction reagent, an anhydrous ethanol, a PCR amplification reaction solution, a positive control, a negative control and a pyrosequencing reaction solution. The kit is characterized by comprising upstream and downstream primers 9F-Biotin and 9R for detecting exon 9 of the target gene and a sequencing primer 9RCX, and upstream and downstream primers 20F-Biotin and 20R for detecting exon 20 of the target gene and a sequencing primer 20RCX. The kit can be used to detect polymorphism of hot spot mutation sites (E542K, E545K and H1047R) in the colorectal cancer related PIK3CA gene, and has good specificity and high accuracy.

The invention discloses a palmtop pyrosequencing system based on digital microfluidic technology, and belongs to the technical field of digital microfluidics. A digital microfluidic chip, an electromagnetic module, and an integrated circuit are connected, and the integrated circuit and a chemiluminescent collection module are connected to a computer. According to the palmtop pyrosequencing systembased on digital microfluidic technology, a printed circuit board is used as a chip substrate, and based on an on-chip dielectric wetting principle, the electrifying sequence of electrodes that are located on the chip is regulated to achieve liquid drop generation, transportation, mixing and splitting in a sequencing process. The system is easy to operate and is miniaturized, and the produced optical signal can be fast rapidly read, so that single base on the chip is measured. The system is simple in structure, low in cost, easy to integrate, and high in detection sensitivity, the sequencing cost is greatly reduced, and the system can be widely applied to the field of pyrosequencing-based gene detection.

The invention discloses a kit and a method for detecting the gene polymorphism related to warfarin personalized medication by a pyro sequencing method. The kit is used for typing genes related to the warfarin medication, and the single nucleotide polymorphism of VKORC1-1639 G>A (rs9923231) and CYP2C9*31075A>C(rs1057910) is involved; and the kit comprises primers shown as SEQ ID NO.3-8. By the kit, VKORC1-1639G>A and CYP2C9*3 1075A>C can be detected accurately and quickly in high flux, so that the safe, reasonable and effective personalized administration of the warfarin medication is realized.

The invention relates to a sequencing primer pair for detecting an ALDH2 (Aldehyde Dehydrogenase 2) genotype with a pyrosequencing method and a kit thereof, and belongs to the technical field of in-vitro nucleic acid detection. The primer pair comprises a positive amplification primer, a reverse amplification primer and a sequencing primer, wherein a 5' end of the positive amplifier primer is subjected to biotin labeling. The kit comprises the positive amplification primer, PCR (Polymerase Chain Reaction) reaction liquid containing the reverse amplification primer, the sequencing primer, uracil DNA (Deoxyribose Nucleic Acid) glycosylase and Taq polymerase. The kit provided by the invention has the advantages of accurate detection result, high specificity, short detection period, easiness in operation, and capability of effectively meeting clinical examination requirements. Moreover, the kit further has the advantages that a reaction process can be monitored in real time, the reaction time is short, a PCR product can be subjected to pyrosequencing by a pyrosequencing instrument and high-flux sample detection through simple treatment, and the sensitivity is higher compared with a golden standard method, namely, a capillary electrophoresis sequencing method.

The invention discloses a method for detecting the community structure and abundance of ammonia oxidizing bacteria in a wastewater system. The method comprises the following specific steps: (A) extracting all genome DNA (Deoxyribonucleic Acid) of microorganisms in active sludge of the wastewater system; (B) performing PCR (polymerase chain reaction) amplification by taking all genome DNA as a template and taking amoAlF with a sequence number of SEQ ID No.1 and amoA2R with a sequence number of SEQ ID No.2 as primers; and (C) sequencing an amplification product by adopting a Roche 454 pyrosequencing process, dividing an operational taxonomic unit for a sequencing result by applying a Mothur program, performing online BLASTn comparison on representative sequences with the similarity of 99% in the operational taxonomic unit and sequences disclosed in a database GenBank, and dividing a system evolutionary tree according to a comparison result to obtain the community structure distribution and abundance of the ammonia oxidizing bacteria. The method is simple to perform, low in cost, quick in detection and high in sequence analysis accuracy, can be used for qualitatively analyzing different community structures of the ammonia oxidizing bacteria and quantitatively analyzing the abundance of different species of the ammonia oxidizing bacteria, can be used for simultaneously analyzing a plurality of samples, and is relatively high in practicality and easy to popularize and apply.

The invention discloses a kit and method for detecting the tamoxifen personalized medicine genetic polymorphism by use of the pyrosequencing technique. The genetic polymorphism specifically refers to the single nucleotide polymorphism of CYP2D6*10(rs1065852) and (SULT1A1*2) (rs9282861). The kit comprises the primer shown by SEQ ID NO.3-8. The kit disclosed by the invention can realize accurate, quick and high-flux detection on CYP2D6*10(rs1065852) and (SULT1A1*2) (rs9282861) so as to realize safe, reasonable and effective personalized administration of the tamoxifen medicine.

The present invention relates to a method of assessing the soil quality and health of mined and un-mined lands. The present invention further relates to a method of assessing ecosystem health and soil restoration efforts. The method employs a multi-prong approach combining DNA fingerprinting and in-depth pyrosequencing of soil microorganisms that are responsible for maintaining soil fertility and productivity. The method incorporates assessing the indigenous bacterial community structure data derived from PCR-DGGE analysis and 165 rRNA gene clone libraries, and then further identification of those microorganisms that are known to promote soil health by soil metagenome analysis. Disparity between un-mined and post-mined soils are comprehensively studied via multivariate statistical analyses on the polyphasic dataset.

A conventional large-scale parallel pyrosequencing apparatus has the disadvantage that throughput decreases because much time and a large number of procedures are required for introduction of measurement beads, and analysis accuracy is deteriorated due to a reduction in accuracy of reagent replacement. There is provided an apparatus, wherein the apparatus includes a flow cell having a plurality of microfabricated reactors, and a camera opposed thereto, and DNA to be measured is fixed on the surfaces of beads having a specific gravity of 4 or greater, preferably zirconia beads. The flow cell is made horizontal when introducing the beads into the flow cell, and opposed to an optical axis of the camera when measuring an elongation reaction, the optical axis of the camera having a gradient with respect to the horizontal direction.