89 results about "Protein microarray" patented technology

The invention of novel protein microarrays and protein microarray-based techniques to determine the presence and amounts of proteins of interest are described. These microarrays and methods of use can be used for the simultaneous detection of a multiplicity of antigens or antibodies in a high throughput assay based upon the differential affinity of molecules for one another. The microarrays can be formed by immobilizing capture proteins in an array on a membrane. Analytes of interest can be bound by the capture proteins and can be detected either by the position to which they are immobilized or by the identity of detecting proteins or agents which bind to the analytes of interest. The interactions that can be detected using the present invention can also be used to characterize proteins of unknown identity or character.

The present invention provides a protein micro-array surface plasma resonance imaging detection system and its detection method. Said system includes surface plasma resonance micro-array protein sensor, incident arm, reflecting arm and signal processing unit, the described sensor includes prism, micro-array chip and sample cell, between prism and micro-array chip a refractivity oil layer is coated, the incident arm is positioned at one side of the sensor, successively includes semiconductor laser, collimator, polarizer, attenuator and reactangular light diaphragm, the reflecting arm is positioned at another side of the sensor, and successively includes lens and CCD receiver, and signal processing unit includes signal processing circuit and computer.

The present invention is directed to systems and methods for assessing the success of the transplant of a cell, tissue, or organ before and after transplant. Protein array technology is used to obtain a biomarker pattern for the cell, tissue, or organ that is being considered for transplant or that has been transplanted. Samples for the identification of biomarkers and biomarker patterns are obtained from the cell, tissue or organ itself, or from a body fluid of the donor or recipient. Sample biomarker data are compared to reference biomarker data obtained from donors, recipients or cells, tissues or organs that have been transplanted. Correlation of a sample biomarker pattern with the reference biomarker pattern, where transplant outcome for the samples used for the reference biomarkers is known, permits a suggested treatment determination. A computerized system to identify the condition of transplant before or after implantation is also provided.

A data analysis system and/or method, e.g., a data mining/data exploration method, using subtractive clustering is used to explore the similarities and differences between two or more multi-dimensional data sets, e.g., generated using a flow cytometer, an image analysis system, gene expression, or protein microarrays.

The present application relates to methods for providing a protein microarray product and related products and services to a customer, methods, kits, and systems for labeling a probe for a protein microarray, and methods for determining protein concentrations using a protein microarray. The methods for providing a protein micorarray can include, in certain aspects, a computer function for performing some of the steps of the methods. Methods and kits for labeling a probe can include a control array that includes a molecule that binds to a label of a probe.

The present invention involves a multicomponent protein microarray comprising two or more components of a protein-based system entrapped within spots of a biomolecule compatible matrix arranged on a surface. Also included are methods of using the microarray for multicomponent analysis along with kits and machinery comprising the microarray.

The invention provides a method and its kit for quantitatively detecting a specific analyte with a single capturing agent. The quantitative detection of a specific analyte with a single capturing agent comprises: firstly combining the tested analyte with a solid phase capturing agent, then labeling analyte which has been trapped by the capturing agent with a report molecule; secondly eluting the labeled analyte from the complex, recombining the tested analyte with a new solid phase capturing agent, and ascertaining the content of analyte by detecting the report molecule's label signal. The kit of the invention comprises a capturing device, a detecting device, a report molecule for labeling and an analysis substance eluate. The advantages of the invention are the need of one single capturing agent, the capability of detecting for many analytes which can't be tested at present, wide application, high sensibility and low noise. The invention can be applied to diagnosis, medical expertise, new medicine development, application of protein micro array and chip, and fundamental research.

The present invention relates to methods of conducting assays for enzymatic activity on microarrays useful for the large-scale study of protein function, screening assays, and high-throughput analysis of enzymatic reactions. The invention relates to methods of using protein chips to assay the presence, amount, activity and/or function of enzymes present in a protein sample on a protein chip. In particular, the methods of the invention relate to conducting enzymatic assays using a microarray wherein a protein and a substance are immobilized on the surface of a solid support and wherein the protein and the substance are in proximity to each other sufficient for the occurrence of an enzymatic reaction between the substance and the protein. The invention also relates to microarrays that have an enzyme and a substrate immobilized on their surface wherein the enzyme and the substrate are in proximity to each other sufficient for the occurrence of an enzymatic reaction between the enzyme and the substrate.

Provided are protein microarrays, their manufacture, use, and application. Protein microarrays in accordance with the present invention are useful in a variety preoteomic analyses. Various protein arrays in accordance with the present invention may immobilize large arrays of proteins that may be useful for studying protein-protein interactions to improve understanding of disease processes, facilitating drug discovery, or for identifying potential antigens for vaccine development. The protein array elements of the invention are native or modified proteins (e.g., antibodies or fusion proteins). The protein array elements may be attached directly to a organic functionalized mirrored substrate by a binding reaction between functional groups on the substrate (e.g., amine) and protein (e.g., activated carboxylic acid). Techniques for chemical blocking of the arrays are also provided. The invention contemplates spotting of array elements onto solid planar substrates, labeling of complex protein mixtures, and the analysis of protein binding to the array. The invention also enables the enrichment or purification, and subsequent sequencing or structural analysis of proteins that are identified as differential by the array screen. Kits including protein-binding microarrays for proteomic analysis in accordance with the present invention are also provided.

The present invention relates to a slide having a first and a second major surface on opposite sides of the slide and one or more openings through the slide from the first major surface to the second major surface and one or more membranes mounted to one major surface of the slide over the one or more openings. The slide provides for both an ability to wash and to reduce the background fluorescence in the active membrane area. Preferably the membrane is made of nitrocellulose, nylon or PVDF. The opening(s) can be used to allow wash solutions to pass through the membrane and be removed along with the contaminants (unattached materials such as proteins or antibodies, dyes, salts, etc) from the slide thereby reducing the fluorescent background. Additionally, the one or more openings exhibit a lower fluorescence than a membrane that is laid over or attached to the slide, as neither the slide material or any adhesive is present which would otherwise increase the background fluorescence.

The present invention provides proteomic techniques that extend sensitive and quantitative analysis of proteins to post-translational modifications. Protein micro-arrays and/or multiplex coded-microbeads are used in combination with multilayered affinity interaction detection (MAID) methods that permit high throughput analysis of cellular protein modifications and functional protein interactions.

A microarray comprising: a support, on which is disposed a layer of microspheres bearing biological probes; wherein said microspheres comprise at least one material with a latent color that can be developed and used to identify said microsphere. A method of identifying biological analytes using the microarray is also disclosed.

Disclosed are a polyacrylamide-based method of fabricating surface-bound peptide and protein arrays, the arrays themselves, and a method of using the arrays to detect biomolecules and to measure their concentration, binding affinity, and kinetics. Peptides, proteins, fusion proteins, protein complexes, nucleic acids, and the like, are labeled with an acrylic moiety and attached to acrylic-functionalized glass surfaces through a copolymerization with acrylic monomer. The specific attachment of GST-green fluorescent protein (GFP) fusion protein was more than 7-fold greater than the nonspecific attachment of non-acrylic labeled GST-GFP. Surface-attached GST-GFP (0.32 ng/mm²) was detectable by direct measurement of GFP fluorescence and this lower detection limit was reduced to 0.080 ng/mm² using indirect antibody-based detection. The polyacrylamide-based surface attachment strategy was also used to measure the kinetics of substrate phosphorylation by the kinase c-Src. The surface attachment strategy is applicable to the proteomics field and addresses denaturation and dehydration problems associated with protein microarray development.

The invention relates to fluorescent nanoparticles Ru(bpy)3/SiO2, a preparation method and application thereof. The fluorescent nanoparticles have nuclear shell structures; the nuclear shell structure is formed by taking tris(2,2'-bipyridyl)ruthenium as a core, covering silicon dioxide with netlike structure on the surface of the tris(2,2'-bipyridyl)ruthenium and carrying active amino groups on the surface of the silicon dioxide, wherein the mass ratio of the tris(2,2'-bipyridyl)ruthenium to the silicon dioxide is 1:5 to 1:8; and every milligram of nanoparticles comprises 385nmol of amino group. The silicon fluorescent nanoparticles Ru(bpy)3/SiO2 have the advantages of uniform size, high monodispersity, mean diameter of 70+/-6nm, high light stability and difficult dye leakage in aqueous solution. The fluorescent probe is applied to a protein microarray chip to detect HIV p24 antigen after marking streptavidin; the analysis method is a sandwich fluorescence immunoassay method; and the result shows that the fluorescence intensity is in good positive relationship with p24 concentration and the analytical sensitivity is 3.1ng/mL. The result shows that the nanoparticles, serving as a novel fluorescent probe, can be applied to the systems of the protein microarray chip and fluorescence immunoassay and the like for high flexibility detection.

Methods and reagents for site-selective functionalization of peptides and proteins. The methods most generally involve the reaction of a thioester with hydrazine. Reagents include bifunctional reagents of formula:

H₂N—NH—CH₂-M-L-FG

and salts thereof where M is a single bond or a chemical group carrying a non-bonding electron pair, such as —C(O)NR′—, where R′ is H, or an alkyl or aryl group; L is an optional linker group as described above; and FG is a functional group having reactivity that is orthongonal to that of the hydrazine group. FG can, among others, be an azide, alkenyl, alkynyl, nitrile (—CN) or triazole group and is preferably an azide group (—N₃). Methods and reagents can, for example, be combined with intein-mediated protein splicing to link proteins or fragments thereof to various chemical species or to a surface. Surface immobilization of proteins via the methods herein results in immobilized proteins which substantially retain biological activity and is thus useful for the generation of peptide or protein microarrays. Kits for functionalization and/or immobilization of peptides and proteins are provided as well as microarrays of peptides, proteins or both.

A system and method are disclosed for the rapid, reproducible and inexpensive visualization, imaging and digital analysis of molecular interactions between ligands and proteins immobilized on an addressable two-dimensional microarray.

The present invention relates to automated methods, systems, and apparatuses for protein separation and analysis. In particular, the present invention provides an automated system for the separation, identification, and characterization of protein samples. The present invention thus provides improved methods for the separation and analysis of samples containing a plurality of proteins (e.g., cells).

A protein microarray element comprising: a) a support; b) a gelatin layer containing functional groups capable of binding biological probes; and interposed between the support and the gelatin layer and c) an adhesive interlayer layer capable of maintaining contact with the support and with the gelatin layer.

The invention relates to a protein membrane chip which comprises a pedestal, a spacer, a diaphragm and an upper cover; a group of pedestal holes are disposed on a pedestal; a group of spacer holes are disposed on the spacer; the lower end surface of the spacer is pasted and fixed on the upper end surface of the pedestal from the upper side; the lower end surface of the diaphragm is pasted and fixed on the upper end surface of the spacer from the upper side; the upper cover comprises an upper cover substrate, an upper cover boss and a cutting edge; the upper cover boss is disposed at a center position of the upper cover substrate; the upper cover boss comprises an upper cover boss outer frame and an upper cover boss fence; the upper cover boss fence partitions a center hole of the upper cover boss outer frame into a group of upper cover holes with the same number and size as the pedestal holes; the cutting edge is disposed along the central part of the upper cover boss outer frame and the central part of the upper cover boss fence, and the upper end surface is connected to the bottom of the upper cover boss; the upper cover is detachably fixed on the pedestal; the cutting edge of the upper cover passes through the diaphragm, is inserted into the spacer, and cuts the diaphragm into protein micro-array areas. The invention is convenient for assembly, and can prevent sample cross contamination.