860 results about "Reference genes" patented technology

The present invention is directed to a new method for genotype determination at a specific gene locus of an individual or a fetus comprising (i) amplifying a first sequence of said gene locus and a second sequence of a second reference gene locus from DNA originating from a sample containing biological material of said individual or fetus (ii) Monitoring both amplifications preferably in real time and determining the amount of amplification products after each cycle, and (iii) Calculating the ratio between the amount of DNA from the first gene locus and the amount of DNA from the second gene locus. The new method is useful for a variety of applications, especially for detection of chromosomal abnormalities in fetal cells.

The invention discloses a method for detecting mutation information in a multiplex amplification sequencing product of a genome. The method comprises steps as follows: sequencing data are subjected to quality assessment and preprocessing; a recognizable sequencing sequence is selected for sequence assembling; the recognizable sequencing sequence or a sequence obtained through assembling is compared with a reference gene sequence, and preliminary variation information is obtained; fine calibration of sequence variation is performed according to different types of conditions; a calibrated sequencing fragment is obtained; the homozygosis or heterozygosis state of a target fragment is obtained according to the type of the sequencing fragment with the highest abundance; finally, the mutation information in the multiplex amplification sequencing product of the genome is obtained. By means of the method, the amplification product can be rapidly, efficiently and accurately recognized, and the calculation resources are saved; the sequence assembling process is compatible, and the problem of reduction of the quality value of basic groups produced in the sequencing process can be effectively solved; the homozygosis/heterozygosis state of variation information can be more effectively and stably judged, and random errors introduced in the PCR (polymerase chain reaction) process and the sequencing process are eliminated.

The invention provides compositions and methods for determining a prognosis of a B cell chronic lymphocytic leukemia (CLL) in a subject based on the level of expression of at least one marker gene. Marker genes provided by the invention are SEPTlO, KIAA0799, Hs.23133, and ADAM29. The marker genes can be used to differentially diagnose CLL in a subject based on relative gene expression levels in the subject compared to reference gene expression levels established from a clinically characterized population of patients. The invention also provides diagnostic reagents and compositions and kits based on the marker genes.

The invention discloses a method and a device for quick contrast and analysis of a short sequence for second-generation sequencing, which can solve the problems of low contrast efficiency and high memory occupation ratio of sequencing data. The method comprises the following steps of obtaining a DNA (deoxyribonucleic acid) short sequence obtained by sequencing, and respectively mapping and encoding the DNA short sequence by a first hash algorithm and a second hash algorithm, so as to respectively obtain a first index and a second index; according to a preset index query library, the first index and the second index, contrasting the DNA short sequence and a reference gene group, wherein the index query library consists of an unit structure array, and each unit structure comprises value and index 2; storing the array index offset of each unit structure as the corresponding index 1, namely the index value corresponding to the structure array, wherein K is the length of segment sequence; according to the contrast result, when the contrast result is correct, obtaining the value of the K-mer segment contrasted with the corresponding DNA short sequence, and determining the chromosome number of the corresponding DNA short sequence and the site on the chromosome.

The invention discloses a fluorescent quantitative PCR kit for detecting the copy number of a virulence gene of human spinal muscular atrophy. The fluorescent quantitative PCR kit comprises amplimersand fluorescent probes, wherein the amplimers consist of a pair of shared primers for specific amplification of the seventh exon of SMN1 and SMN2 genes, a pair of shared primers for specific amplification of the eighth exon of the SMN1 and SMN2 genes, and a pair of specific primers for specific amplification of a reference gene, i.e., a CFTR gene; and the fluorescent probes consist of a fluorescent probe for specific detection of the seventh exon of the SMN1 gene, a fluorescent probe for specific detection of the eighth exon of the SMN1 gene, a fluorescent probe for specific detection of the seventh exon of the SMN2 gene, a fluorescent probe for specific detection of the eighth exon of the SMN2 gene and a fluorescent probe for specific detection of the reference gene CFTR. The fluorescentquantitative PCR kit for detecting the copy number of the virulence gene of human spinal muscular atrophy is directed at problems and insufficiencies in quantitative detection of the copy numbers of human motoneuron genes and is rapid and simple in detection and reliable in detection results.

The invention discloses a quantitative RT-PCR primer and probe and agent box of BCR-ABL fusing gene mRNA fluorescence with BCR-ABL fusing gene primer and probe sequence as SEQ ID NO1-4 and internal reference gene primer and probe sequence as SEQ ID NO5-7, wherein the agent box contains cell cracking liquid, water, RT-PCR reacting liquid, internal reference TBP RT-PCR reacting liquid, BCR-ABL fusing gene detecting probe, TBP internal reference gene testing probe, composite enzyme, standard material and comparing material; the box can test the expressive level of mRNA of P210BCR/ABL and P190BCR/ABL in the specimen, which provides the reference to diagnose, recurrent and treat chronic granulocytic leukemia and acute lymphocyte leukemia.

The invention belongs to the technical field of plant gene engineering, and discloses a screening method for real-time fluorescent quantitative PCR reference genes of Hibiscus hamabo Sieb.et Zucc. Thescreening method utilizes a transcriptome database of Hibiscus hamabo Sieb.et Zucc, selects 10 candidate reference genes, and takes 10 candidate reference gene sequences as templates to design real-time fluorescent quantitative PCR specific primers, selects different tissues of Hibiscus hamabo Sieb.et Zucc and Hibiscus hamabo Sieb.et Zucc leaves under various abiotic stresses and hormone treatments as experimental materials for performing a fluorescent quantitative PCR experiment, and finally, performs data analysis by applying geNorm, NormFinder and BestKeeper software. The most stable reference genes in the screening method are ACT and SKIP. The screening method for real-time fluorescent quantitative PCR reference genes of Hibiscus hamabo Sieb.et Zucc establishes a screening system forstable reference genes of hibiscus hamabo, and provides stable reference genes for developing gene function research of Hibiscus hamabo Sieb.et Zucc.

The invention relates to a multiple reverse transcription real-time fluorescent quantitative PCR detection kit for synchronously detecting an ORF1ab gene, an N gene, and an S gene of 2019 novel coronavirus and a human B2M gene, and a special primer and probe combination thereof. According to the kit, three 2019 novel coronavirus genes and a human reference gene are simultaneously detected by adopting a single-tube four-fluorescence channel, and existence of 2019 novel coronavirus RNA in respiratory tracts and blood samples can be detected. The kit is short in detection period, high in specificity, high in sensitivity, low in omission ratio and good in repeatability, quality monitoring can be performed on an extraction and amplification process of the sample through a detection result of the human reference gene, and a false positive result caused by aerosol pollution is reduced through a dUTP-UNG enzyme anti-pollution system.

The invention provides a method for detecting HER 2 positivity of breast cancer through the ddPCR technology and specifically provides an HER 2 copy number variation detection kit. The kit is characterized by comprising two pairs of primers for detecting HER 2 genes and one or more pairs of primers for detecting reference genes of CEP 17 or EFTUD2 or a combination of CEP 17 and EFTUD2. By combining the ddPCR technology with a combination of multiple reference genes, whether a sample with suspended positivity determined through a conventional method has HER 2 positivity or not can be effectively judged, and therefore assistance and guide can be provided for breast cancer medication.

The invention relates to a tea tree miRNA fluorescent quantitative PCR reference gene Pc-222-3p, which has a nucleotide sequence as shown in SEQ ID NO: 1, as well as a screening method of the reference gene. According to the method, 6 common plant miRNA reference genes and 3 tea tree miRNAs are selected as candidate reference genes, and the expression stabilities of the candidate reference genes under different low temperature stresses and in different tea tree tissues are evaluated by virtue of qRT-PCR technology through two software, namely BestKeeper and geNorm, so as to provide a reference for the selection of reference genes for tea tree miRNA differential expression analysis under low temperature stress. The obtained tea tree miRNA fluorescent quantitative PCR reference gene Pc-222-3p is stable in gene expression under different temperatures of treatment and in different tea tree tissues; therefore, the reference gene Pc-222-3p can be used as a reference gene for tea tree miRNA fluorescent quantitative PCR under low temperature stress.

The invention discloses a primer and a kit for detecting septin9 gene methylation. The primer comprises a target gene primer pair Septin9 forward primer F and an Septin9 reverse primer R. The kit comprises the primer and optimally further comprises a reference gene primer, a TaqMan-MGB probe and two Blocker primers. The kit is simple and convenient to operate, is easy to judge and is low in requirement for instruments; the whole PCR process is fully closed; the cross contamination possibility is avoided; the result is more accurate. Compared with the method of detecting by adopting PCR specific primer, the method of identifying the methylated site by utilizing the probe has higher flexibility and accuracy. Two Blocker primers are utilized to strictly control the amplification of the non-specific stripe, so that the kit has higher detection sensitivity and specificity and is especially fit for early screening of free DNA of colorectal cancer plasma.

The embodiment of the invention discloses a method for quickly comparing gene data, which comprises the following steps: an FPGA reads genes to be compared and a reference gene from a buffer, and thelength of the genes to be compared is L; the FPGA determines a plurality of target seeds from a reference gene accord to a gene to be aligned and a preset algorithm, and the target seeds are gene sequences match with the gene to be aligned for a certain length; the FPGA selects the seeds with the highest similarity from multiple target seeds as the optimal seeds; according to the position of the best seed in the reference sequence, the FPGA obtains the gene sequence with preset length, and the length of the gene sequence is greater than or equal to the length of the best seed; the FPGA scoresthe best seeds by calculating the shortest editing distance between the best seeds and the estimated sequence, and the score is used to indicate the accuracy and authenticity of the best seeds; the FPGA outputs an optimal comparison result according to the scoring of the optimal seeds. The throughput performance of the algorithm can be improved and the efficiency of gene alignment can be improved.

The invention discloses a Kit for detecting the methylation level of a lung cancer associated SHOX2 gene promoter region, which comprises a target gene primer pair, a reference gene primer pair, Taqman probes, and blocking agents, wherein the Taqman probe is used for detecting target genes and reference genes, and the blocking agent has a blocking effect. The target gene primer pair comprises a target gene forward primer shown in a sequence SEQ ID NO.1 and a target gene reverse primer shown in a sequence SEQ ID NO.2; and the reference gene primer pair comprises a reference gene forward primer shown in a sequence SEQ ID NO.3 and a reference gene reverse primer shown in a sequence SEQ ID NO.4. The target gene Taqman probe for detecting is shown in a sequence SEQ ID NO.5, and the reference gene Taqman probe is shown in a sequence SEQ ID NO.6. The blocking agents are shown in a sequence SEQ ID NO.7 and a sequence SEQ ID NO.8.

The invention provides a GSTM3 (Glutathione S-Transferase M3) gene methylation quantitative detection method for hepatic failure prognosis and a kit, and provides a method and a device for quantitatively detecting the methylation degree of a glutathione S-transferase M3 promoter. The kit is internally provided with a reagent for extracting peripheral blood genome DNA (Deoxyribose Nucleic Acid), a reagent for modifying the genome DNA, a 5*premixing PCR (Polymerase Chain Reaction) system, a methylation specific primer pair and a Taqman fluorescence probe aiming at a target gene GSTM3 promoter, and a specific primer pair and a Taqman fluorescence probe of reference genes ALU-C4. According to the GSTM3 gene methylation quantitative detection method for the hepatic failure prognosis and the kit, the methylation specific primer pair and the probe of the target gene GSTM3 promoter and the specific primer pair and the probe of the reference genes can be used for carrying out a real-time quantitative polymerase chain reaction (PCR) on the peripheral blood genome DNA; a quantitative methylation specific PCR method is used for detecting a threshold value circulation value of the target gene GSTM3 and the reference genes ALU-C4 and calculating a gene GSTM3 methylation quantitative value, so as to be good for evaluating illness states, judging the prognosis and guiding the treatment.

The invention belongs to the field of gene data processing and provides a method and device for data classification of metagenomes. The genomic classification precision is improved at a small time cost. The method comprises the steps of calculating feature vectors of a sequencing sequence; clustering the feature vectors to obtain M groups of clusters G1 to GM including read length, and M is an integer not smaller than 1; obtaining a center set Ki of each cluster from the clusters G1 to GM; and through the comparison of each read length of the center set Ki of each cluster and the reference gene sequence, judging the genome category of each cluster. Compared with the prior art, according to the technical scheme, the time cost used for classification is reduced, the operating speed is improved, and the classification precision of the genome category which the sequencing sequence belongs to is remarkably improved.

The invention discloses a primer probe assembly for high-specificity amplification HLA (Human Leukocyte Antigen)-B*5801 alleles on the basis of a TaqMan probe detection method. The primer probe assembly comprises an upstream primer Fp: 5'-AGGGGCCGGAGTATTGGGATG-3', a downstream primer Rp: 5'-TTGGCCTCAACTGAAAATGAAAC-3' and a probe: 5'-HEX-TCAGGGAGGCGGATCTCGGAC-BHQ2-3'. Primers and probes of reference genes ACTB are used simultaneously, target genes and the reference genes are added into a tube for dual-channel fluorescent quantitative PCR reaction, and a result is analyzed through an amplification curve. The method has the characteristics of simplicity, convenience, flexibility, quickness, high specificity, high flux, zero pollution, high resolution and the like, and is applicable to detection of the HLA-B*5801 alleles of a whole-genome DNA (Deoxyribonucleic Acid) sample in the peripheral blood and the saliva of a human body.

The invention discloses screening and application of fluorescent quantitative reference genes of pear fruits at different development stages, and relates to the field of pear molecular biology researches. Reference genes, which are more stable than common housekeeping genes at different development stages of Cuiguan, Fengshui and Xueqing pear fruits, are pertinently obtained according to dynamic RNA (Ribonucleic Acid)-Seq sequencing results, post-period experience validation and data analysis of pear fruits of various varieties; the difference between samples and the difference in the samples, which are caused by the selection of the reference genes, are reduced to the greatest extent; the correction and standardization of a target gene expression level can be realized, and accurate quantification of functional gene expression of the pear fruits is realized.

The invention discloses a method for detecting a CNV (copy number variation) mark of a MAPK10 gene of Nanyang cattle and an application thereof. The method comprises the following steps: respectively amplifying the CNV region and reference gene BTF3 of the MAPK10 gene of Nanyang cattle through a real-time fluorescence quantification PCR method by taking blood genome DNA of Nanyang cattle as a template; dividing the result into insert type, deficient type and normal type according to log22-delta delta Ct; and identifying CNV of the MAPK10 gene of Nanyang cattle. Analysis correlated to Nanyang cattle production data indicates that the growth and development of Nanyang cattle is remarkably influenced by different copy numbers of MAPK10, wherein the birth weight, 18-month-aged body height and 24-month-aged body weight and daily gain of a normal type individual body are remarkably higher than those of the insert type and deficient individual bodies. The CNV mark closely related to the production traits of Nanyang cattle is detected on DNA level, and can be used as an important candidate molecular mark for marker assisted selection of the growth traits of Nanyang cattle of China.

The invention discloses a quantitative detection method for a gene copy number. The method comprises the following steps of: respectively designing primers and fluorescence probes for target gene and reference gene amplification sequences, and designing a closed probe for the target gene amplification sequence; detecting a sample: performing multiple TaqMan fluorescent quantitative polymerase chain reaction (PCR) on target genes and reference genes by using the DNA sample to be detected as a template, and respectively recording Ct values by using a DNA sample with known target gene copy number as a reference sample; and analyzing the result. By the method, the copy number of the functional genes can be directly and quantitatively detected, and deletion, deletion number and multiple copies (CNVs) of the detected genes are directly reflected, so that synchronous quick detection of gene deletion and multiple gene copies is realized; and the method is high in sensitivity, the synchronous quick detection of the gene deletion and the multiple gene copies can be finished only by a common fluorescent quantitative PCR instrument, and experiments prove that the method is accurate and reliable.

The invention discloses a composition for noninvasive screening of an early lung cancer and application of the composition. The composition comprises three pairs of methylation-specific primer probes of SHOX2 (Short Stature Homebox2) genes, three pairs of methylation-specific primers of PTGER4 (Prostaglandin E Receptor 4) genes and one pair of reference gene primer probes and further comprises three MGB probes corresponding to non-methylation target genes in the SHOX2 genes and three MGB probes corresponding to the non-methylation target genes in the PTGER4 genes. A methylation detection kit for the noninvasive screening of the early lung cancer comprises the composition. Patients suffering from the early lung cancer are screened by detecting promoters of the SHOX2 genes and the PTGER4 genes of free DNA in blood of high-risk lung cancer individuals and methylation conditions of three target sites in gene coding and non-coding areas, and early diagnosis of the lung cancer is aided. The methylation-specific PCR/MSP detection method is simple and convenient in operation and low in time consumption, and the results are easily analyzed.