1236 results about "Molecular probe" patented technology

A system and methods for co-registering multi-channel images of a tissue micro array, comprising the steps of, providing a biological material on a substrate; applying one or more molecular probes, adapted to provide fluorescent molecular markers, to the biological material; obtaining a first digital image of the biological material and the fluorescent molecular markers; applying a morphological stain to the biological material; obtaining a second digital image of the biological material, computing information common to the first and second images; and co-registering the second image with the first image based on one or more registration metrics.

Novel rhodamine dye compounds, labelled conjugates comprising the dyes are described, together with methods for their use. The dyes and labelled conjugates are useful as molecular probes in a variety of applications, such as in assays involving staining of cells, protein binding, and analysis of nucleic acids, such as hybridization assays and nucleic acid sequencing.

A molecular detection chip including a metal oxide silicon-field effect transistor (MOSFET) on sidewalls of a micro-fluid channel and a molecular detection device including the molecular detection chip are provided. A molecular detection method, particularly, qualification methods for the immobilization of molecular probes and the binding of a target sample to the molecular probes, using the molecular detection device, and a nucleic acid mutation assay device and method are also provided. The formation of the MOSFET on the sidewalls of the micro-fluid channel makes easier to highly integrate a molecular detection chip. In addition, immobilization of probes directly on the surface of a gate electrode ensures the molecular detection chip to check for the immobilization of probes and coupling of a target molecule to the probes in situ.

An oligonucleotide-based molecular probe includes at least one pin loop, the pin loop including a loop sequence complementary to a target sequence. A first stem sequence is attached to one end of the pin loop, the first stem having at least one fluorescent label attached thereto. A second stem sequence is attached to the other end of the pin loop. The second stem has a plurality of quencher molecules attached thereto.

The invention relates to the field of specific molecular identification and diagnosis reagent and in particular discloses a near infrared fluorescent dye with structural formulas I and II; and the invention also discloses a near infrared molecular probe which is obtained through covalent bonding between the near infrared fluorescent dye with the structural formulas I and II and a ligand of specific molecules. The near infrared molecular probe can be used for early diagnosis of turmour diseases.

The invention provides a method detecting and quantifying proteins by mass spectrophotometric analysis using peptide internal standards and provides a highly sensitive way of detecting protein modifications. In one aspect, the invention provides a method for determining a site of ubiquitination in a polypeptide and for evaluating ubiquitination targets in a population of polypeptides. In this way, a proteome ubiquitination map can be obtained which comprises information relating to the ubiquitination states of a plurality of cellular polypeptides. Maps can be obtained for a variety of different types of cells and cell states. For example, ubiquitination targets in normal and diseased cells can be evaluated. Preferably, the map is stored as data files in a database. Individual ubiquitinated polypeptides identified can be used to generate molecular probes diagnostic of a cell state and/or can serve as targets for agents that modulate one or more cellular processes.

The present invention provides binding assays, referred to here as fluorescence proximity assays or FPA. The inventions detect binding of target molecules in a sample to a molecular probe or probes that specifically bind or hybridize to those molecules. In particular, the molecular probes are immobilized to a bead or particle, such as colloidal gold, the reflects fluorescent energy from a fluorophore. The derivatized beads are contacted to a sample of fluorescently labeled target molecules, and binding of the target is indicated by an increase in the fluorescent signal. Kits are also provided that contain materials and reagents to performing a fluorescence proximity assay.

Provided herein are compositions of functionalized, fluorescent nanocrystals comprising fluorescent nanocrystals coated with an imidazole-containing compound; compositions of functionalized, fluorescent nanocrystals comprising fluorescent nanocrystals coated with an imidazole-containing compound and cross-linked with a phosphine cross-linking compound; compositions of functionalized fluorescent nanocrystals operably bound to molecular probe; a process of making functionalized, fluorescent nanocrystals; and a process of using functionalized, fluorescent nanocrystals in a detection system.

A method for applying gold nanoparticles mimetic enzyme in biological detection adopts gold nanoparticles instead of horse radish peroxidase (HRP) in the biological detection. The detection comprises the following steps: coupling the gold nanoparticles and a specific molecular probe to construct a specific nano-probe; performing specific binding between the nano-probe and the corresponding target molecule to be detected; developing with coloring solution containing peroxide and hydrogen-donating substrate, and measuring absorbance or performing microscopic observation so as to realize the qualitative and quantitative detection of the target molecule. The method belongs to the nanometer material and biomedical nanometer technical field. In the method, the size of the used gold nanoparticles mimetic enzyme is 1-1000nm, the gold nanoparticles mimetic enzyme can imitate HRP to catalyze peroxide and hydrogen-donating substrate to perform a color development reaction, and the enzymatic activity increases with the decrease of the size of the gold nanoparticles. The method of the invention uses the gold nanoparticles to label antibody and other biological molecules to build the similar enzyme labeled antibody and other diagnose preparations, thus having extensive application value.

The present invention relates to a method and apparatus for enhancing the electron transport property measurements of a molecule when the molecule is placed between chemically functionalized carbon-based nanoscopic electrodes to which a suitable voltage bias is applied. The invention includes selecting a dopant atom for the nanoscopic electrodes, the dopant atoms being chemically similar to atoms present in the molecule, and functionalizing the outer surface and terminations of the electrodes with the dopant atoms.

The invention relates to a magnetic gamma-Fe2O3 nano-particle mimetic enzyme and provides a method for applying a magnetic gamma-Fe2O3 nano-particle mimetic enzyme to biological detection. The magnetic gamma-Fe2O3 nano-particle mimetic enzyme replaces a horse radish peroxidase (HRP) to be used in biological detection. The method comprises the following steps: coupling carboxyl groups on the surface of magnetic gamma-Fe2O3 nano-particles and a specific molecular probe to construct a specific nano probe; combining the nano probe with the specificity of the corresponding target molecules to be detected; developing by using a developer containing peroxides and hydrogen-supply zymolytes; and measuring the absorbency or carrying out the micro-observation so as to realize the qualitative and quantitative detection on target molecules.

Novel DNA constructs are provided which may be used as molecular probes or inserted into a plant host to provide for modification of transcription of a DNA sequence of interest in cotton fiber, particularly in very early fiber development. The DNA constructs comprise a cotton fiber transcriptional initiation regulatory region associated with a gene which is expressed in cotton fiber.

A method and apparatus are provided for identifying molecular structures within a sample substance using an integrated circuit array sensor having a plurality of test sites upon which the sample substance is applied. Each test site includes a probe formed therein to bond with an associated target molecular structure. An electrical signal produced on the test site upon forming or breaking of molecular probe-target duplexes is detected to determine which probes have bonded to an associated target molecular structure.

The present invention provides nucleic acid hybridization probes having a target-binding region and a labeled hairpin structure at at least one end of the probe. The hairpin-labeled probes include oligonucleotides, dendrimers, and primer-extended nucleic acids. The probes can be used in disclosed methods for detection of target nucleic acids. In addition, the oligonucleotide probes can be used in disclosed methods for primer-extension, including, e.g., random priming and PCR amplification, to produce the primer-extended hairpin-labeled probes. Also disclosed are kits comprising the hairpin-labeled oligonucleotide and dendrimer probes. Further, the present invention provides biomolecules (e.g., peptides, polypeptides, carbohydrates, lipids, and the like) that are labeled via linkage to labeled hairpin structures.

Compositions, systems and methods utilizing engineered surgical irrigants providing delivery of components with therapeutic or other secondary benefits. Engineered irrigants provide targeted delivery of desired agents, including agents for propulsion of nano-devices, agents including molecular probes, gene expression agents, magnetically orientable agents, agents for discrete tissue temperature detection and tissue regeneration agents.

Methods for concurrently processing multiple biological chip assays by providing a biological chip plate comprising a plurality of test wells, each test well having a biological chip having a molecular probe array; introducing samples into the test wells; subjecting the biological chip plate to manipulation by a fluid handling device that automatically performs steps to carry out reactions between target molecules in the samples and probes; and subjecting the biological chip plate to a biological chip plate reader that interrogates the probe arrays to detect any reactions between target molecules and probes.

The invention provides a phenanthrene and imidazole-coumarin double-fluorescent group ratio fluorescent molecular probe for iron ion detection and synthesis and use methods thereof, relates to fluorescent molecular probes and synthesis and application thereof and aims to solve the problem that an existing Fe<3+> fluorescent probe is prone to being interfered by pH, concentration and other metal ions. The fluorescent molecular probe is 4-methyl-7-hydroxide radical-8-[2-(1- phenyl group-1H-phenanthrene and [9, 10-d] imidazole-2-)benzene ammonia methylene]-2H-pyran-2-ketone. The phenanthrene and imidazole-coumarin double-fluorescent group ratio fluorescent molecular probe is formed by conducting condensation on 1-N-phenyl group-2-(2-aminophenyl)-1H-phenanthrene and [9, 10-d] imidazole and 4-methyl-7-hydroxide radical-8- formyl group coumarin, and the yield is 75-85%. The fluorescent molecular probe is dissolved in mixed liquid of N, N- dimethylformamide and an HEPES buffering solution, existence of iron ions is judged through the absorbance value or fluorescence intensity change before and after adding of test samples, and the fluorescent molecular probe can be used for detection of Fe<3+> pollution in water.

The invention relates to a preparation method of a fluorescent molecular probe for detecting sulfite ions through naked eyes and fluorescence ratio as well as the application of the fluorescent molecular probe in detecting sulfite ions. The fluorescent molecular probe is prepared by condensing 4-hydroxy naphthalimide serving as raw material and acetylpropionic acid in refluent methylene dichloride. The synthesis is simple and convenient, and the reaction conditions are mild. The probe molecule provided by the invention has higher sensitivity, stable fluorescence performance, higher synthesis yield and good selectivity, and furthermore, the response range of the probe is 0-1500 mu m, the detection limit is 6 mu m; the detection range is wide, the lower detection limit is low, and the probe is suitable for naked eye detection. Meanwhile, the florescence-ratio detection is adopted to avoid errors caused by exciting light intensity, probe concentration and environment factors of an off-on type probe which detects ions only depending on the change of fluorescence intensity and the probe disclosed by the invention is not influenced by anions such as F<->, Cl<->, Br<->, I<->, HPO4<2->, SO4<2->, NO<3->, AcO<->, ClO<4->, N<3-> and HCO<3->. Even interfering ions exist, the probe has very good response to sulfite ions. Therefore, the fluorescent molecular probe has practical application value in the fields of biochemistry, environmental science and the like.

The invention relates to a copper ion/mercury ion fluorescence molecular probe, and a preparation method and application thereof. The invention mainly aims to solve the problem of single detection ion in the fluorescence molecular probe for detecting copper ions or mercury ions in the prior art, and the problems of low sensitivity, poor selectivity, high sensitivity to pH value, and the like in most fluorescence molecular probes. The preparation method of the fluorescence molecular probe comprises the following steps: (1) dissolving 1 part of rhodamine B in ethanol, adding 2-5 parts of hydrazine hydrate at room temperature, stirring under reflux for 1-2 hours, cooling, and filtering to obtain a precipitate; and (2) adding 1 part of precipitate into 50-500 parts of mixed solvent composed of methanol and dichloromethane in a volume ratio of 3:1, adding 2-6 parts of 40-60wt% formalin, stirring at room temperature in a nitrogen atmosphere for 6-8 hours, evaporating under reduced pressure to remove the solvent, and carrying out silica gel chromatographic separation to obtain the fluorescence molecular probe. The invention has the advantages of high fluorescence quantum yield, low sensitivity to solvent polarity, high chemical/light stability and the like.

The invention provides compositions useful as molecular probes. In particular, the invention provides activatable cell penetrating peptides comprising a fluorescence donor and a fluorescence acceptor. Exemplary fluorescence donors and fluorescence acceptors include compounds derived from cyanine. Also provided are ratiometric, multispectral, and excitation lifetime imaging methods for detecting the molecular probes provided herein.

The invention relates to a preparation method of a fluorescence enhanced fluorescent molecular probe for detecting mercapto-containing amino acids, and an application of the probe, and concretely relates to a preparation method of a 7-hydroxyquinoline derivative and an application of the 7-hydroxyquinoline derivative in the mercaptoamino acid detection. The fluorescent probe is a pure probe synthesized through directly reacting the 7-hydroxyquinoline derivative with dimethyl sulfate. The largest absorption wavelength of the molecule of the probe is 315nm; and the absorption wavelength of the probe molecule redshifts to 406nm from 315nm with the addition of the mercapto-containing amino acids, the intensity of a fluorescent spectrum at 505nm is continuously enhanced, and very strong green fluorescence is emitted. The probe molecule has the advantages of high detection sensitivity, strong identification capability on the mercapto-containing amino acids, and fast response speed, and has detection limits of Cys, GSH and Hcy mercaptoamino acids being 23nM, 52nM and 5.3nM respectively, and like probes have important application values in the biochemical field and the like.

The present disclosure relates to compositions and methods of RNA analysis. In particular, the present disclosure provides a method of RNA analysis that includes obtaining a sample, applying one or more multi-partite probes to the sample, where each of the one or more multi-partite probes includes at least two sub-probes, annealing at least one of the applied one or more multi-partite probes to at least one target nucleic acid within the sample, and ligating the at least two sub-probes associated with the at least one annealed multi-partite probe to create a target nucleic acid proxy that can be detected.