摘要:
The present disclosure relates to compositions and methods, and related systems, products and kits, for performing temperature-dependent multiplex invasive cleavage assays, where a plurality of target nucleic acids are detected and distinguished from each other in a procedure using only a single fluorescent moiety as the reporter, and single channel fluorescence detection. In some embodiments, at least one of the plurality of target nucleic acids is an amplified nucleic acid, where progress in a thermal cycling amplification reaction is monitored as a function of time (i.e., real-time amplification).
摘要:
The present invention is directed methods for identifying, in a sample, one or more target nucleotide sequences differing from other nucleotide sequences in the sample by one or more nucleotides, one or more copy numbers, one or more transcript sequences, and/or one or more methylated residues, using ligation detection reactions, polymerase mediated extension reactions, and/or cleavage reactions. The present invention is also directed to methods for identifying, in a sample, one or more nucleotides in a target nucleotide sequence.
摘要:
Provided herein is reagent mixture comprising multiplexed amplification reagents and flap assay reagents for detecting, in a single reaction, mutant copies of the KRAS gene that contain any of the 34A, 34C, 34T, 35A, 35C, 35T or 38A point mutations. Methods that employ the reagent mix and kits for performing the same are also provided.
摘要:
The present invention is generally drawn to a novel method for determining a SNP (single nucleotide polymorphism) genotype using a PTO-SNV (Probing and Tagging Oligonucleotide for Single Nucleotide Variation). The present invention provides novel protocols for SNP genotyping in which only one allele-specific oligonucleotide permits in a SNP genotyping reaction to determine whether a target nucleic acid sequence to be analyzed is homozygous or heterozygous for the SNP allele of interest or has no SNP allele of interest.
摘要:
The present invention is directed to methods for identifying the presence of one or more methylated or unmethylated target nucleotide sequences in a sample that involve coupled methylation sensitive restriction enzyme digestion-ligation and/or extension processes. In some embodiments, the ligation and primary extension products formed in the reaction processes of the present invention are subsequently amplified using a polymerase chain reaction. The ligation products or primary extension products are detected, and the presence of one or more methylated or unmethylated target nucleotide sequences in the sample is identified based on the detection.
摘要:
Provided herein is reagent mixture comprising multiplexed amplification reagents and flap assay reagents for detecting, in a single reaction, mutant copies of the KRAS gene that contain any of the 34A, 34C, 34T, 35A, 35C, 35T or 38A point mutations. Methods that employ the reagent mix and kits for performing the same are also provided.
摘要:
Methods and compositions for nucleic acid amplification, detection, and genotyping techniques are disclosed. In one embodiment, a nucleic acid molecule having a target-specific primer sequence; an anti-tag sequence 5' of the target-specific primer sequence; a tag sequence 5 'of the anti-tag sequence; and a blocker between the anti-tag sequence and the tag sequence is disclosed. Compositions containing such a nucleic acid molecule and methods of using such a nucleic acid molecule are also disclosed.
摘要:
A method for detecting a methylated genomic locus is provided. In certain embodiments, the method comprises: a) treating a nucleic acid sample that contains both unmethylated and methylated copies of a genomic locus with an agent that modifies cytosine to uracil to produce a treated nucleic acid; b) amplifying a product from the treated nucleic acid using a first primer and a second primer, wherein the first primer hybridizes to a site in the locus that contain methylcytosines and the amplifying preferentially amplifies the methylated copies of the genomic locus, to produce an amplified sample; and c) detecting the presence of amplified methylated copies of the genomic locus in the amplified sample using a flap assay that employs an invasive oligonucleotide having a 3' terminal G or C nucleotide that corresponds to a site of methylation in the genomic locus.