摘要:
An apparatus for the separation and fractionation of differentially expressed gene fragments includes a separating means including a capillary filled with a separation medium to separate DNA fragments by electrophoresis, a sampling means including sampling vessels to fractionate and sample the separated DNA fragments, according to their size, a transferring means to transfer buffer solution containing the separated DNA fragments to the sampling means, and a control means to control the sampling means based on a signal gained by detecting means, wherein a voltage for the electrophoresis and a length of the capillary are adjusted such that a spread in time of the separated DNA fragments caused by the transferring means during the transfer of the separated DNA fragments to the sampling vessels is smaller than a difference in separation time of the DNA fragments in the separating means.
摘要:
There are beforehand prepared a monomer having a reaction residue and a polynucleotide probe set comprising plural kinds of polynucleotide probes having a residue bonded to the reaction residue. The monomer is mixed with each kind of polynucleotide probes comprising any plural probes selected from the polynucleotide probe set. Each kind of the resultant mixtures is added to each of different small holes to make the mixture into gel matrix. Thus, a polynucleotide probe chip is produced. Sample DNA is forcibly migrated in the gels by electrophoresis. Laser light is projected onto the side face of the chip. The fluorescence emitted from the whole surface of the chip is collectively detected with a high-sensitive two-dimensional detector. Thus, the polynucleotide probe chip, holding various kinds of DNA probes, for detecting DNA can be provided. This chip has high hybridization-efficiency and makes high-sensitivity and high-speed DNA detection possible.
摘要:
There are beforehand prepared a monomer having a reaction residue and a polynucleotide probe set comprising plural kinds of polynucleotide probes having a residue bonded to the reaction residue. The monomer is mixed with each kind of polynucleotide probes comprising any plural probes selected from the polynucleotide probe set. Each kind of the resultant mixtures is added to each of different small holes to make the mixture into gel matrix. Thus, a polynucleotide probe chip is produced. Sample DNA is forcibly migrated in the gels by electrophoresis. Laser light is projected onto the side face of the chip. The fluorescence emitted from the whole surface of the chip is collectively detected with a high-sensitive two-dimensional detector. Thus, the polynucleotide probe chip, holding various kinds of DNA probes, for detecting DNA can be provided. This chip has high hybridization-efficiency and makes high-sensitivity and high-speed DNA detection possible.
摘要:
Accurate and sensitive sequencing in pyrosequencing is achieved by allowing complementary strand synthesis reaction to proceed homogeneously and completely in a short time while performing luminescence reaction for a sufficiently long time. DNA as a sequencing target is immobilized on the surface of a solid support. Nucleic acid substrates are injected from a dispenser to the support site where complementary strand synthesis is in turn performed rapidly and completely in a short time under a small reaction volume. Next, the support together with the product thereon is moved into a luminescence reaction solution where luminescence reaction is in turn performed. Thus, a DNA complementary strand synthesis reaction site and a luminescence reaction site are completely separated. The support surface is also washed by dipping the support in the luminescence reaction solution that contains a luminescence reagent and an enzyme that degrades redundant nucleic acid substrates.
摘要:
The present invention provides a method and/or means for collecting and analyzing an individual cell in a tissue, and at the same time, quantitatively monitoring the expression levels of various genes while keeping two-dimensional information in the tissue. Specifically, the present invention provides a method comprising preparing a cDNA library from mRNA while keeping two-dimensional cellular distribution information and obtaining the gene expression levels at any site or all sites at a level of single cell. More specifically, the present invention provides a method comprising preparing a cDNA library in a sheet-form from mRNA while keeping two-dimensional cellular distribution information and repeatedly using the cDNA library in the detection of the gene expression, thereby allowing measurement of the expression distribution for a number of genes at a high accuracy.
摘要:
This invention provides a nucleic acid amplification device whereby the abundance of a target molecule can be maintained before and after a step of separately amplifying a sample such that highly accurate analysis results that can be applied to gene expression analysis can be obtained. Also, a nucleic acid amplification device having a structure in which a plurality of minute reaction cells each comprising a set of a bead-retaining space capable of retaining a single analysis bead and a reagent reaction space retaining no bead but having a volume that is large enough to cause a reagent reaction therein are positioned so as to form a planar face is provided.
摘要:
It is intended to provide a technique for amplifying, individually and in parallel, nucleic acids contained in a mixture of plural kinds of nucleic acid samples. The present invention provides a nucleic acid analysis method comprising amplification means, whereby amplification reaction is performed in a reaction solution comprising a homogeneous solvent and comprising at least plural template nucleic acids and solid phase carriers comprising one or more kinds of amplification probes immobilized on the surface, to prevent amplified products attributed to two or more template nucleic acids from being replicated in one solid phase carrier. According to the present invention, plural kinds of analyte nucleic acid samples in a mixed state can be amplified individually and in parallel. This method achieves one solid phase carrier-one nucleic acid. Therefore, a higher density of solid phase carriers with obtained amplified products is easily achieved, leading to improved throughput of amplified product analysis. Reactions in all the amplification reaction steps are performed under homogeneous solvent conditions. Therefore, the method of the present invention is performed by convenient procedures and as such, is suitable to automation.
摘要:
A method of the present invention comprises fractionating a sample solution containing analyte DNA molecules into small droplets, wherein the number M of the droplets is greater than the total number N of the DNA molecules, subjecting an emulsion containing the droplets to, for example, PCR amplification, and detecting the presence or absence (amount) of an amplicon obtained in each droplet by fluorescent detection using an intercalator or the like.
摘要:
By the conventional technique for dispensing more than one reagents accurately, the system is complicated and thus a compact and inexpensive system is difficult to realize. In the present invention, the pressurized dispensing system utilizing a capillary is realized, and in addition, in order to reduce the leakage of reagents different from the reagent dispensed, by forming air layers at the tips of the capillaries after dispensing, a compact, simple, inexpensive analysis apparatus is realized.