162 results about "Transcription (biology)" patented technology

The invention relates to a method for obtaining an SSR (Simple Sequence Repeat) primer of lycium ruthenicum based on transcription sequencing, and belongs to the technical field of molecular marking techniques of molecular genetics of biology. The method comprises the following steps of (1), carrying out transcriptome sequencing; (2), screening an EST-SSR (Expressed Sequence Tag-Simple Sequence Repeat) site; (3), carrying out primer design; (4), extracting DNA (Deoxyribonucleic Acid); (5), carrying out primer screening; (6), carrying out polymorphic primer screening by using 8-percent native polyacrylamide gel electrophoresis. The method for obtaining the SSR primer of the lycium ruthenicum based on the transcription sequencing, which is provided by the invention, can be used as a method for the correction of a linkage map of a genome between remote species and comparative mapping, and has higher utilization value in two aspects. The greatest advantages of the method are that the development is simple and quick and the expense is low. The general characteristic of the SSR of the lycium ruthenicum is specified by utilizing an SSR molecular marking technique; the SSR primer of the lycium ruthenicum is developed; the foundation is laid for carrying out the research on the genetic diversity, the linkage map construction and the affinity relationship of species resources of the lycium ruthenicum by utilizing an SSR molecular marker, so that the method is better applied to molecular breeding.

The invention discloses a detection kit and detection method for H1, H3 and H9 type avian influenza viruses and belongs to the technical field of biology. The kit comprises an RNA extraction kit, an RNA reverse transcription kit and an RPA detection kit. The RNA extraction kit is used for extracting RNA of a to-be-detected sample to be used as a detection template. The RNA reverse transcription kit is used for conducting reverse transcription on the RNA in the detection template to obtain cDNA. The RPA detection kit comprises primers and fluorescent dye. The primers are used for amplifying the cDNA to obtain an amplified DNA sequence. The primers comprise the forward primer and the reverse primer. The fluorescent dye is used for conducting fluorescence detection on the amplified DNA sequence. According to the detection kit and the detection method, the avian influenza viruses can be rapidly, easily and conveniently detected.

The invention relates to a method for realizing efficient and fixed-point transgenosis by using a TALEN (Transcription Activator-Like Effector Nuclease) technology, belonging to the field of molecular biology. The method comprises the following steps of: designing a TALEN target point with a specific sequence in a special position in an organism genome by using the TALEN technology, constructing a TALEN plasmid, and meanwhile, constructing an exogenous gene plasmid; then, co-transfecting the TALEN plasmid and an exogenous gene into recipient cells, and then incising in a to-be-integrated position of a recipient cell genome; and finally, automatically inserting an exogenous gene sequence to the exogenous gene at the incision of the recipient cell genome. The fixed-point integration of the exogenous gene on the genome is realized by using the method; and the method is simple in operation, high in controllability and strong in practicability.

The invention relates to the technical field of molecular biology, and particularly discloses a sarcoma fusion gene joint detection primer group, kit and detection method. The kit provided by the invention comprises: 1) a special linker for DNA library construction; 2) a specific composite primer for detecting fusion genes and point mutation; and 3) a composite primer for library amplification. DNA and RNA of a to-be-detected sample are respectively extracted, reverse transcription is performed on RNA to synthesize cDNA, the cDNA is mixed with DNA, fragmentation, terminal repair and linker ligation are performed on the mixture, PCR amplification is performed on the product, a library is enriched, and high-throughput sequencing is performed. According to the fusion gene detection kit and detection method provided by the invention, various fusion genes or mutations related to sarcoma can be detected at one time, the detection efficiency is improved, the operation is convenient, the consumption time is short, and the sensitivity is relatively high and can reach 0.1%.

The invention belongs to the technical field of crop disease diagnosis and molecular biology and discloses a multiple RT-PCR (Reverse Transcription-Polymerase Chain Reaction) method for synchronously detecting five watermelon viruses. A PCR system contains five pairs of specific primers (SEQ ID NO1-10), and the five viruses are synchronously multiplied in one PCR system, so as to obtain specific bands 1464bp, 1023bp, 810bp, 600bp and 327bp and establish and optimize a multiple RT-PCR reaction system capable of synchronously detecting the viruses CiLCV, CGMMV, ZYMV, MABYV and WMV. A detection result indicates that the optimized multiple RT-PCR reaction system can detect a field sample quickly, efficiently and accurately. The method has a significant meaning for forcasting of occurrence and disease epidemiology of five common viruses such as CiLCV and the like on monitored watermelons.

The invention discloses preparation, detection and application of a polyclonal antibody of a Yam mild mosaic virus (YMMV). Based on a YMMV genome, the inventor purifies a nuclear inclusion protein/coat protein (NIb/CP) of the YMMV through prokaryotic expression and uses the nuclear inclusion protein/coat protein to prepare the polyclonal antibody for an immune rabbit. The polyclonal antibody can specifically identify the Nib/CP protein of YMMV through prokaryotic expression and the Nib/CP protein of the YMMV virus which infects common yam rhizome, and generates specific immunity response. On the basis, the inventor further builds a set of efficient, high sensitive and accurate IC-RT-PCR (Immunocapture-Reverse Transcription-Polymerase Chain Reaction, ELISA (Enzyme-Linked Immuno Sorbent Assay) and Western blot methods which can specifically detect the YMMV from a common yam rhizome plant which is infected by YMMV. By applying the invention, a material basis and a technical support can be provided for research on interaction of the YMMV and the host, quick detection of the virus and somatotype and molecular biology study, thereby laying a solid foundation for epidemiologically monitoring and preventing treating the virus.

The invention belongs to the technical fields of molecular biology, immunology and nucleic acid chemistry, and particularly relates to an HPV nucleic acid detection kit based on enzyme-linked immunosorbent assay and application of the HPV nucleic acid detection kit. The kit is based on an immunoassay method for detecting high-risk HPV16 type E6 and E7 RNA by using an Sdr monoclonal antibody; a detection process is realized as follows: amplification of a target sequence by using technologies such as inverse transcription and PCR is not needed, an unlabelled DNA probe is used for being hybridized with the HPV16 type E6 and E7 RNA to form a DNA:RNA heterozygote, and then the heterozygote is recognized by using the Sdr monoclonal antibody, and subsequent signal multiplication is performed. A detection method has the advantages of high speed, low cost, high sensitivity, and no need of complicated amplification and detection instruments, and is capable of detecting an initial viral load.

The invention relates to a plant expression vector and a construction method thereof, and a method for producing chicken alpha interferon by utilizing crowtoe as a bioreactor, belonging to the technical field of biology. The plane expression vector pSFRLH is shown as the figure 1 in the specification. In the invention, main stem sections, rachis stem sections and tender leaves of crowtoe are used as explants, and a constructed plane expression vector chicken alpha interferon gene ChIFN-alpha is subjected to genetic transformation and regeneration and then subjected to PCR (Polymerase Chain Reaction), RT-PCR (Reverse Transcription-Polymerase Chain Reaction), Southern blot, Western blot and ELISA (Enzyme-Linked Immuno Sorbent Assay). Proved by a detection result, the ChIFN-alpha gene is integrated into a crowtoe chromosome genome and correctly transcribed, translated and expressed, and recombinant protein can be neutralized by a ChIFN-alpha antibody. The invention lays the foundation for producing animal medical protein by utilizing crowtoe pasture grass as a bioreactor and provides a new thinking for the control of animal epidemic diseases.

The invention provides rationally designed multi-targeting therapeutic agents for myotonic dystrophy type 1 (DM1), an incurable neuromuscular disease that originates in an abnormal expansion of CTG repeats (CTG^exp) in the DMPK gene. The rationally designed small molecules target the DM1 pathobiology in three distinct ways: (1) binding the expanded trinucleotide repeat, CTG^exp, and inhibiting its transcription to the toxic CUG^exp RNA, (2) binding the CUG^exp RNA and releasing sequestered muscleblind-like protein (MBNL1), and (3) cleaving the toxic CUG^exp in an RNase-like manner. Importantly, the compounds can reduce the levels of CUG^exp in DM1 model cells and reverse two separate CUG^exp-induced phenotypes of DM1.

The invention relates to a complementary DNA (cDNA) sequence of tobacco NtFT1 genes and transient expression thereof for inducing tobacco early blossoming, in particular to NtFT1 genes of tobacco FT (Flowering locus T) and application of the NtFT1 genes in inducing the tobacco early blossoming, and belongs to the field of genes in molecular biology. The invention discloses a full-length coded sequence of the NtFT1 genes derived from tobacco for controlling the plant blossom time and a protein sequence coded by using the full-length coded sequence. The NtFT1 genes are obtained by performing Blastn comparison and splice site analysis on the data searched from China tobacco genome sequencing planning data through homologous sequence searching. According to the cDNA sequence, a method for performing semi-quantitative polymerase chain reaction (PCR) or reverse transcription-polymerase chain reaction (RT-PCR) on NtFT1 gene specific primers is designed to clone the genes. According to the invention, a potato virus X (PVX) virus expression vector of the NtFT1 genes is also constructed, and the constructed virus expression vector is used for performing diafiltration and infestation on flue-cured tobacco varieties including Hongda and Yunnan tobaccos 87 and K326 through agrobacterium, and can induce the early blossoming of the varieties to prove that the genes have a function of inducing the early blossoming of cured tobaccos. When a PVX virus transient expression system of the NtFT1 genes is used for tobacco breeding, the growing time of the tobaccos can be shortened, and the fixed number of years for breeding a new tobacco variety is reduced.

The invention discloses a method for testing the development process of silkworm embryos. The method specifically comprises the following steps of: (1), establishing a model expressing the incidence relation between the relative transcription expression quantity of the acetylcholine esterase type 1 (ace1) of a to-be-tested variety of the silkworm embryos and the development process of the embryos; (2), selecting at least one embryo from the to-be-tested silkworm embryos to use as a sample, testing the relative transcription expression quantity of the ace1 of the sample, and then contrasting with the model obtained in step (1) to determine the development process of the silkworm embryos according to the relative transcription expression quantity of the ace1 of the to-be-tested sample. The development stage of a whole graine can be accurately determined by the method through the test on the development process of a small quantity of silkworm embryos. Manual operation errors can be reduced, the test process is simplified, and a development process identification method is provided for molecular biology study of the silkworm embryos.

The invention relates to the technical field of biology, and discloses a single-input multi-output gene loop. The gene loop selects two pairs of inhibitory transcription factors having good orthogonality and remarkable inhibition efficiency differences and DNAs combined with the inhibitory transcription factors for responding to the cell surface antigen density, and different functional proteins are driven to be expressed according to the intensity of input signals. Effect cells are improved through the single-input multi-output gene loop, and can be driven to differentially express differentfunctional proteins such as cell factors along with density changes of antigens of target cells, and a combination effect on the target cells is achieved. According to the single-input multi-output gene loop, the efficiency for cell treatment of a single antigen can be improved, and the single-input multi-output gene loop is considered in a method for cell treatment of multiple antigens.

The invention discloses a one-step RT-PCR (Reverse Transcription-Polymerase Chain Reaction) detection kit for an influenza virus, relating to a PCR kit in the technical field of biology. The kit comprises one-step 5xRT-PCR Buffer, positive control, negative control, three pairs of specific primers and Enzyme Mix; a specific primer AF: 5'-ATTCTAACCGAGGTCGAAACGT-3' and a specific primer AR: 5'-GACAAAGCGTCTACGCTGCAGTC-3' are designed according to a gene M of an influenza virus type A; a specific primer is designed according to a gene NS of an influenza virus type B; and a specific primer is designed according to a gene HA of an influenza virus A type H1N1. The detection kit has a short detection time period, high detection efficiency, high virus detection specificity, high accuracy, higher detection sensitivity than an immunological detection method and high experiment result repeatability, can be applied to qualitative analysis of viruses, and is easy to operate and popularize.

The invention discloses a multiple RT-PCR (reverse transcription-polymerase chain reaction) detection primer group and kit for rapidly distinguishing PEDV (porcine epidemic diarrhea virus), PDCoV (porcine deltacoronavirus) and PReoV (porcine reovirus), and belongs to the technical field of animal virology and molecular biology. The kit comprises primer sequences as shown in SEQ ID 1-6, Prime STARHR buffer solution, a cDNA template and sterile water. The multiple RT-PCR detection kit of the PEDV, the PDCoV and the PReoV is amplified by multiple RT-PCR, three lesions are similar and serve as primary detection of RNA viruses, total detection time is controlled to be about 2 hours, the detection method is easy to operate, convenient and rapid, and rapid detection can be achieved.

The invention discloses preparation, detection and application of a polyclonal antibody of a virus of the potato virus X potyvirus for infecting yam virus X, (yam virus X, YVX). Based on the YVX genome, prokaryotic expression is utilized by an inventor to purify the CP (coat protein) and be used for immune a rabbit to prepare the polyclonal antibody; the polyclonal antibody can specifically recognize the CP of the YVX subjected to prokaryotic expression and the CP of the YVX virus infected by yam, and can generate a specificity immune reaction. Based on the preparation, an efficient, high-flexibility and accurate IC-RT-PCR (immunocapture-reverse transcription-polymerase chain reaction), ELISA (enzyme-linked immuno sorbent assay) and Western blot method is established by the inventor, and YVX can be detected specifically from a yam plant which is infected by the YVX. According to the invention, a material basis and a technical support can be provided for the mutual interaction research of the YVX and a host and the rapid detection, parting and molecular biology research of the virus, and a solid basis is developed for the prevalence monitoring, prevention and treatment of the virus.

The invention relates to the field of molecular biology, and relates to a circular RNA detection method and kit. The circular RNA detection method comprises the following steps: S1, primer design; S2,reverse transcription reaction: taking 0.1-1 [mu]g of extracted total RNA, adding N6 Random Primer and RNase-Free H2O, performing mixing to obtain a reaction solution I, adding 5 x HT RT Buffer intothe reaction solution I, adding HT M-MLV Mix into the reaction solution I, and finally adding RNase-Free H2O to obtain cDNA; and S3, HS PCR amplification: performing qPCR detection by using the FSjodPrimers obtained in the step S1, 2 x SNP Taq Mix, 50 x ROX Mix *, the RNase-Free H2O and the cDNA obtained in the step S2.

The invention discloses a double RT-PCR (reverse transcription-polymerase chain reaction) detection method of CVB (chrysanthemum virus B) and CChMVd (chrysanthemum chlorotic mottle viroid), belonging to the virus detection field of molecular biology. The method comprises the following steps of: (1) sampling from chrysanthemum plants, and extracting total RNA (ribonucleic acid); (2) respectively designing two pairs of specific primers for CVB and CChMVd: CVB-F and CVB-R; CChMVd-F and CChMVd-R; (3) carrying out reverse transcription by taking a random hexamer as a primer to obtain two kinds of cDNA (complementary deoxyribonucleic acid); and (4) amplifying the cDNA by utilizing the RT-PCR technology, and carrying out agarose gel electrophoresis on the amplified products to obtain a 665bp specific fragment for expressing infection of CVB and obtain a 206bp specific fragment for expressing infection of CChMVd. The detection method provided by the invention can be used for simultaneously detecting diseased plants which are compositely infected by CVB and CChMVd, and has the advantages of strong detection specificity, high sensitivity, simple process and cost saving.

The invention discloses a primer combination and plasmid for simultaneously detecting 9 kinds of respiratory tract viruses and a detection kit and belongs to the technical field of biology. The primercombination comprises primer pairs for detecting an influenza a virus, an influenza b virus, an H7 influenza virus, an NL63 corona virus, a 229E corona virus, a type 2 parainfluenza virus, Bocavirus,a respiratory syncytial virus A, a respiratory syncytial virus B and a human internal-reference GAPDH gene. The detection kit comprises a 2*multiple reverse transcription PCR reaction solution, a reverse transcription PCR enzyme mixed solution, a primer mixed solution, non-RNAase water, a magnetic bead mixed solution, a reported buffer solution, a positive control and phycoerythrin-modified streptavidin. According to the primer combination and plasmid and the detection kit, by virtue of a liquid-phase chip technology, the manufactured detection kit can be used for carrying out qualitative analysis on a variety of respiratory tract viruses simultaneously, and the sensitivity and specificity of detection reach PCR levels; and types of respiratory tract virus infections can be rapidly and accurately judged, early etiologic diagnosis and treatment on clinical respiratory tract infections are facilitated, the shortening of a treatment cycle is facilitated, the medical expense is reduced, and good social benefits are generated.

The invention relates to the technical field of biology and discloses a whole genome cloning method of pelteobagrus fulvidraco bacillus-shaped virus. The method comprises the following steps of: designing 14 specific primers for reverse transcription and 14 pairs of specific primers for PCR, wherein the primer sequences are shown as SEQ ID No.1-SEQ ID No.14; extracting pelteobagrus fulvidraco bacillus-shaped virus RNA; taking the extracted viral RNA as a template, respectively adding the extracted viral RNA into a reverse transcription reaction system and a PCR reaction system by using the primers, cloning the whole genome of the pelteobagrus fulvidraco bacillus-shaped virus by sections under reaction conditions, wherein 13 fragments of the amplified product are 2000bp in size, one fragment is 1000bp in size, a total of 14 fragments contain the entire genome sequence of the pelteobagrus fulvidraco bacillus-shaped virus. The invention provides a cloning method of the whole genome of thepelteobagrus fulvidraco bacillus-shaped virus. The method not only can be used for rapid cloning of the whole genome of the pelteobagrus fulvidraco bacillus-shaped virus, but also can be used for researching molecular biology pathogenic mechanism and molecular epidemiology investigation of the pelteobagrus fulvidraco bacillus-shaped virus, and is convenient to use and has good effect.

The present invention relates to the field of molecular biology, and particularly discloses a full-length cDNA nucleic acid linear amplification method. The method comprises the following steps: separating and purifying mRNA, carrying out reverse transcription synthesis of first strand cDNA, carrying out first strand cDNA 3' terminal extension to obtain full-length first strand cDNA, enriching and purifying the full-length strand cDNA, synthesizing double-stranded cDNA, and the like, such that the full-length cDNA with both known terminal sequences is synthesized. The full-length cDNA nucleic acid linear amplification method has characteristics of high sensitivity and simpleness, and is suitable for efficient synthesis of the full-length cDNA.

The invention relates to clone and application of a loose leaved Chinese cabbage nitratase gene BcNR, belonging to the molecular biology and biotechnology field. Total RNA is extracted from a loose leaved Chinese cabbage leaf and then 2 gamma of the total RNA is reversely transcribed into cDNA; three pairs of special primers are designed according to conservative nucleotide sequences in an NIAI (mouseearcress) and an NR (cabbage type rape) for routine polymerase chain reaction (PCR); PCR products are respectively connected to pMD18-T vectors; DH5alpha cells are transformed and sequencing is performed; full-length cDNA is obtained through quick amplification of 3' terminals and 5' terminals; a sense expression vector is further constructed and the NIAI is transformed. The transgenic NIAI has high nitratase transcription level. The genetic transformation vegetable can adjust the content of nitrate in the vegetable and improve the output and the quality and have very important economic benefit and social benefit.

The invention discloses a transcription factor C/EBPZ for regulating adipocyte formation and application thereof, belongs to the field of animal molecular genetics and developmental biology, and discloses application of the transcription factor C/EBPZ for regulating and controlling chicken adipocyte formation. The invention discloses an expression mode of chicken C/EBPZ in various tissues and an expression rule of C/EBPZ in a chicken adipose tissue growth and development process by utilizing an RT-PCR technology. According to the invention, an overexpression vector of the transcription factoris constructed, and the C/EBPZ transcription factor is verified to regulate and control the differentiation and proliferation of chicken preadipocytes; the invention further discloses an action mechanism of the transcription factor C/EBPZ in chicken adipose tissue formation. The invention provides a novel application of a C/EBPZ transcription factor in regulation and control of chicken adipocyte formation, and the C/EBPZ transcription factor has practical value in the fields of chicken genetic breeding and animal nutrition.

The invention relates to the technical field of molecular biology and gene engineering, in particular to application of a phytophthora sojae oospore development-related transcription factor Myb gene. The phytophthora sojae oospore development-related transcription factor Myb gene has a nucleotide sequence as shown by SEQIDNO.1. A phytophthora sojae Myb transcription factor PsMyb1 gene is the nucleotide sequence as shown by SEQIDNO.1. Protein of the phytophthora sojae Myb transcription factor PsMyb1 gene is a nucleotide sequence as shown by SEQIDNO.2. The PsMyb1 gene provided by the invention mainly aims at regulating and controlling target gene transcription and controlling the development of phytophthora sojae oospores. The gene provided by the invention has a very great value of application to control of phytophthora root rot of soybean. Bactericides which are developed by using the gene as a target have a very important and practical significance to preventing the phytophthora root rot of soybean from occurring and being spread.