摘要:
The present invention relates to a method for identifying a target nucleotide sequence. This method involves forming a ligation product on a target nucleotide sequence in a ligation detection reaction mixture, amplifying the ligation product to form an amplified ligation product in a polymerase chain reaction (PCR) mixture, detecting the amplified ligation product, and identifying the target nucleotide sequence. Such coupling of the ligase detection reaction and the polymerase chain reaction permits multiplex detection of nucleic acid sequence difference.
摘要:
This disclosure provides for methods and reagents for rapid multiplex RPA reactions and improved methods for detection of multiplex RPA reaction products. In addition, the disclosure provides new methods for eliminating carryover contamination between RPA processes.
摘要:
The present invention relates to a novel method for detection of target nucleic acid sequences on a solid phase using dual-labeled immobilized probes and its resistance to a 5′ to 3′ exonuclease activity of a DNA polymerase. Because the label is remained on the solid substrate by resistance to nucleases due to labeling of a base component the internal nucleotide, the present invention requires no consideration of a suitability of position of the label for remaining on the solid substrate. The present invention ensures to minimize background signal by positioning labels at a site on probes suitable to maximize quenching efficiency of the dual label system, since it permits to freely determine the position of the internal label on probes.
摘要:
The invention provides a novel array method for nucleic acid sequence detection with improved specificity which allows for detection of genetic variation, from simple SNPs (where the variation occurs at a fixed position and is of limited allelic number) to more complex sequence variation patterns (such as with multigene families or multiple genetic strains of an organism where the sequence variation between the individual members is neither fixed nor consistent). The array is comprised of short, synthetic oligonucleotide probes attached to a solid surface which are hybridized to single-stranded targets. Single stranded targets can be produced using a method that employs primers modified on the 5′ end to prohibit degradation by a 5′-exonuclease that is introduced to degrade the unprotected strand. The invention further provides for printing buffers/solutions for the immobilization of oligonucleotide probes to an array surface. The invention also provides hybridization and wash buffers and conditions to maximize hybridization specificity and signal intensity, and reduce hybridization times.
摘要:
The present invention relates to the detection of RNA in a sample of cells. More particularly, the present invention relates to the localized detection of RNA in situ. The method relies on the conversion of RNA to complementary DNA prior to the targeting of the cDNA with a padlock probe(s). The hybridization of the padlock probe(s) relies on the nucleotide sequence of the cDNA which is derived from the corresponding nucleotide sequence of the target RNA. Rolling circle amplification of the subsequently circularized padlock probe produces a rolling circle product which may be detected. Advantageously, this allows the RNA to be detected in situ.
摘要:
A composition for sequencing DNA is provided and comprises a nuclease and a nuclease-resistant sequencing primer. A method of preparing DNA for sequencing and a method of sequencing DNA are also provided. The method of sequencing DNA can comprise contacting amplification reaction products with the composition under conditions in which excess amplification primer is degraded by the nuclease and the nuclease-resistant sequencing primer is essentially non-degraded.
摘要:
The present invention provides novel compositions, kits and methods employing RNA 5′ polyphosphatases, RNA 5′ monophosphatases, capping enzymes, decapping enzymes, nucleic acid pyrophosphatases and RNA ligases, as well as other enzymes, for selective 5′ ligation tagging of desired classes of RNA molecules that differ with respect to particular chemical moieties on their 5′ ends. The 5′tagged RNA molecules can be used for synthesis of tagged first-stand cDNA, double-stranded cDNA, and sense or antisense RNA for a variety of uses.
摘要:
This disclosure provides for methods and reagents for rapid multiplex RPA reactions and improved methods for detection of multiplex RPA reaction products. In addition, the disclosure provides new methods for eliminating carryover contamination between RPA processes.
摘要:
Provided herein are compositions, materials, methods and kits for immobilizing a template polynucleotide in a first orientation, and immobilizing a complementary sequence of the template polynucleotide in an orientation that is flipped compared to the orientation of the template polynucleotide. Provided herein are adaptive oligonucleotides that can be used in various nucleic acid manipulations to generate immobilized complement polynucleotides that are flipped in orientation compared to the orientation of the immobilized template polynucleotides.
摘要:
The present invention relates to compositions, methods and systems for analyzing the methylation state of nucleic acids. Some embodiments relate to a compositions, methods and systems for analyzing the methylation state of DNA with a gene array.