Involving Avidin-biotin Binding Patents (Class 435/7.5)
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Patent number: 6927034Abstract: The present invention provides a method of predicting pregnancy outcome in a subject by determining the amount of an early pregnancy associated molecular isoform of hCG in a sample. The present invention further provides a method for determining the amount of early pregnancy associated molecular isoforms of human chorionic gonadotropin (hCG) in a sample. The present invention also provides a diagnostic kit for determining the amount of early pregnancy associated hCG in a sample. The present invention additionally provides an antibody which specifically binds to an early pregnancy associated molecular isoform of human chorionic gonadotropin. Finally, the present invention provides methods for detecting trophoblast or non-trophoblast malignancy in a sample.Type: GrantFiled: May 13, 1999Date of Patent: August 9, 2005Assignee: The Trustees of Columbia University in the City of New YorkInventors: John O'Connor, Steven Birken, Galina Kovalevskaya
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Patent number: 6924116Abstract: Disclosed are silica-coated nanoparticles and a process for producing silica-coated nanoparticles. Silica-coated nanoparticles are prepared by precipitating nano-sized cores from reagents dissolved in the aqueous compartment of a water-in-oil microemulsion. A reactive silicate is added to coat the cores with silica. Also disclosed are methods for functionalizing silica-coated nanoparticles for use in a variety of applications.Type: GrantFiled: November 13, 2001Date of Patent: August 2, 2005Assignee: University of FloridaInventors: Weihong Tan, Swadeshmukul Santra, Peng Zhang, Rovelyn Tapec, Jon Dobson
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Patent number: 6924153Abstract: This invention provides solid phase specific binding lateral flow assay methods, devices and kits for quantitating high and low molecular weight analytes. The methods and devices of the invention employ labelled reagents which are either analyte analogs or complementary specific binding pair members for the analyte and a novel arrangement of capture zones comprising immobilized specific binding substances for either the analyte or the labelled reagent to effect bound from unbound labelled reagent as a function of analyte concentration. The capture zones are disposed on a non-bibulous matrix defining a flow path from a sample receiving zone to the capture zone. The devices of this invention also include multilane flow paths and multiple capture zones to quantitate analyte.Type: GrantFiled: March 6, 1997Date of Patent: August 2, 2005Assignee: Quidel CorporationInventors: Hans Boehringer, Gerald Rowley, Allan Pronovost
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Patent number: 6921669Abstract: The present invention relates to a linker system for activating surfaces for bioconjugation, and particularly to a linker system having a novel hydrophilic spacer group. The inventive linker system may be used for the construction of sensor chips or biochips for the detection of sample biomolecules.Type: GrantFiled: May 16, 2001Date of Patent: July 26, 2005Assignee: Micronas Holding GmbHInventor: Holger Klapproth
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Patent number: 6911344Abstract: A step-gradient composite waveguide for evanescent sensing in fluorescent binding assays comprises a thick substrate layer having one or more thin film waveguide channels deposited thereon. In one embodiment, the substrate is silicon dioxide and the thin film is silicon oxynitride. Specific binding molecules having the property of binding with specificity to an analyte are immobilized on the surface of the thin film channels. In preferred embodiments, the composite waveguide further includes light input coupling means integrally adapted to the thin film channels. Such light coupling means can be a grating etched into the substrate prior to deposition of the thin film, or a waveguide coupler affixed to the upper surface of the thin film. The waveguide coupler has a thick input waveguide of high refractive index which receives the laser light through one end and propagates it by total internal reflection.Type: GrantFiled: November 3, 1998Date of Patent: June 28, 2005Assignee: BioCentrex, LLCInventors: W. Monty Reichert, James N. Herron, Douglas A. Christensen, Hsu-Kun Wang, Jacob D. Durtschi
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Patent number: 6893881Abstract: The invention relates to a method for detecting specific target-cells in a simple and time saving way, using paramagnetic particles, antibodies recognizing the Fc portions of target-cell associating antibodies and target-cell associating antibodies directed to specific antigen determinants in the target-cell membranes. Incubation of the cell suspension with a mild detergent and/or second set of antibodies or antibody fragments, prelabeled or not with fluorescent agents, metallocolloids, radioisotopes, biotincomplexes or certain enzymes allowing visualization, with dramatically increase the specificity of the method. The method can further be used for isolation of the target-cells by magnetic field application and kit for performing the method according to the invention is described.Type: GrantFiled: September 10, 1993Date of Patent: May 17, 2005Assignee: Abbott Laboratories, Inc.Inventors: Øystein Fodstad, Gunnar Kvalheim
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Patent number: 6887672Abstract: The present invention relates to equine Fc epsilon receptor alpha chain nucleic acid molecules, proteins encoded by such nucleic acid molecules, antibodies raised against such proteins, and inhibitors of such proteins. The present invention also includes methods to detect IgE using such proteins and antibodies. Also included in the present invention are therapeutic compositions comprising such proteins, nucleic acid molecules, antibodies and/or inhibitory compounds as well as the use of such therapeutic compositions to mediate Fc epsilon receptor-mediated biological responses.Type: GrantFiled: May 8, 2003Date of Patent: May 3, 2005Assignee: Heska CorporationInventors: Eric R. Weber, Catherine A. McCall
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Patent number: 6884597Abstract: A method for simply and conveniently detecting acetyltransferase and deacetylase activities of proteins by executing an acetylation reaction of a peptide substrate with an acetyltransferase, or a deacetylation reaction of an acetylated peptide substrate with a deacetylase, and after the completion of these reactions, detecting the acetyl group bound to the peptide substrate by using an anti-acetylated peptide antibody. This system for detecting acetyltransferase and deacetylase activities using the anti-acetylated peptide antibody enables screening inhibitors or enhancers of acetyltransferase and deacetylase. A system for screening deacetylase inhibitors or acetyltransferase enhancers using cultured cells is also provided.Type: GrantFiled: July 18, 2000Date of Patent: April 26, 2005Assignee: Medical & Biological Laboratories, Co., Ltd.Inventors: Yoichi Taya, Katsuyuki Tamai, Toshiaki Miyazaki
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Patent number: 6881536Abstract: A method for the detection of an analyte of interest in a sample, which method comprises the steps of: (1) forming a composition comprising (a) a sample, (b) at least one substance selected from the group consisting of (i) added analyte of interest or an analog of the analyte of interest, (ii) a binding partner of the analyte of interest or its said analog, and (iii) a reactive component capable of binding with (i) or (ii), wherein one of said substances is linked to a label compound having a chemical moiety capable of being induced to luminesce, and (c) a plurality of particles capable of specifically binding with the analyte and/or a substance defined in (b) (i), (b) (ii), or (b) (iii); (2) inducing the label compound to luminesce; and (3) measuring luminescence emitted by the composition to determine the presence of the analyte of interest in the sample.Type: GrantFiled: March 30, 1995Date of Patent: April 19, 2005Assignee: BioVeris CorporationInventors: Haresh P. Shah, Lee O. Hall, Michael J. Powell, Richard J. Massey
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Patent number: 6872537Abstract: This invention provides methods for the screening and identification of agents having potent effects on the progression of the cell cycle. In one embodiment, the methods involve contacting a polymerized microtubule with a microtubule severing protein or a microtubule depolymerizing protein in the presence of an ATP or a GTP and a test agent; and (ii) detecting the formation of tubulin monomers, dimers or oligomers. The p60 subunit of katanin provides a particularly preferred microtubule severing protein possessing both ATPase and microtubule severing activities.Type: GrantFiled: April 13, 1999Date of Patent: March 29, 2005Assignee: Regents of the University of CaliforniaInventors: Ronald D. Vale, James J. Hartman
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Patent number: 6858440Abstract: A waveguide probe for the detection of pathogens in a sample which comprises a laser, a first and a second tubes that converge at a point to form a proximal end. A magnet is positioned in the end to configure to focus paramagnetic microspheres attached to antigen/antibody/optically labeled antibody complexes in the field of view. The proximal end is polished to form an aperture.Type: GrantFiled: November 1, 2002Date of Patent: February 22, 2005Assignee: The Board of Governors for Higher Education, State of Rhode Island and Providence PlantationsInventors: Stephen Letcher, He Cao, Hazem Baqaen, A. Garth Rand
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Patent number: 6858423Abstract: Interactions between molecules which are components of self-assembled monolayers and other molecules can be amplified and transduced into an optical signal through the use of a mesogenic layer. The invention provides a device and methods for detecting analytes. The device comprises a substrate onto which a self-assembled monolayer is attached and a mesogenic layer which is anchored by the self-assembled monolayer. The mesogenic layer undergoes a change in conformation in response to the molecular interaction.Type: GrantFiled: August 10, 2000Date of Patent: February 22, 2005Assignee: The Regents of the University of CaliforniaInventors: Nicholas L. Abbott, Justin J. Skaife, Vinay K. Gupta, Timothy B. Dubrovsky, Rahul Shah
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Patent number: 6855508Abstract: The vascular endothelial growth factor (VEGF) activity in a patient's bloodstream or other biological sample can serve as a diagnostic and prognostic index for cancer, diabetes, heart conditions, and other pathologies. Antibody-sandwich ELISA method and kits for VEGF as an antigen were developed to detect VEGF levels in biological samples from animal models and human patients and are used as a diagnostic/prognostic index.Type: GrantFiled: August 5, 2002Date of Patent: February 15, 2005Assignee: Genentech, Inc.Inventors: David Tai Wai Fei, Kristen Tomita
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Patent number: 6844162Abstract: A method and kit for monitoring autoantibodies to thyroid stimulating hormone (TSH) receptor in a sample of body fluid, which employs the steps of: (i) incubating TSH receptor with a sample of body fluid; (ii) reacting the incubated sample of body fluid with at least one binding agent which is capable of binding to the TSH receptor in competitive reaction with TSH receptor autoantibodies (TRAb), or in a case where TSH receptor is complexed to labelled antibody, reacting the sample of body fluid with at least one binding agent which can bind to TRAb in such a way as not substantially to interfere with binding of the TRAb to the TSH receptor; and (iii) detecting bound TRAb in the reacted incubated sample of body fluid.Type: GrantFiled: January 31, 2000Date of Patent: January 18, 2005Assignee: RSR LimitedInventors: Bernard Rees Smith, Jane Sanders, Jadwiga Furmaniak
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Publication number: 20040265921Abstract: The present invention provides an intein-mediated method of attaching a ligand to a protein for immobilization onto a support functionalized with an affinity receptor. In one embodiment, the ligand is biotin and the affinity receptor is avidin. Biotin is attached to the protein by reacting cysteine-biotin with a fusion protein comprising a cleavable intein and a protein of interest to effect cleavage of the cystein and attachment of biotin to the protein. The present invention further provides a novel protein array and a high throughput method of preparing protein arrays by expressing the protein of interest as an intein fusion protein including a binding domain for purification, attaching a ligand to the fusion protein under condition suitable for cleavage of the intein and attachment of the ligand to the remaining protein and immobilizing the resulting protein-ligand onto a support that has been functionalized with an affinity receptor.Type: ApplicationFiled: June 30, 2003Publication date: December 30, 2004Applicant: National University of SingaporeInventors: Marie-Laure Lesaicherre, Yee Peng Rina Lue, Mahesh Uttamchandani, Y.J. Grace Chen, Shao Qin Yao
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Publication number: 20040265922Abstract: The invention is directed to novel compositions of matter and methods of detecting in situ an immunohistochemical epitope or nucleic acid sequence of interest in a biological sample comprising binding an enzyme-labeled conjugate molecule to the epitope or sequence of interest in the presence of a redox-inactive reductive species and a soluble metal ion, thereby facilitating the reduction of the metal ion to a metal atom at or about the point where the enzyme is anchored. Novel phosphate derivatives of reducing agents are described that when exposed to a phosphatase are activated to their reducing form, thereby reducing metal ions to insoluble metal.Type: ApplicationFiled: June 24, 2004Publication date: December 30, 2004Applicant: Ventana Medical Systems, Inc.Inventors: Christopher Bieniarz, Casey A. Kernag, Jerome W. Kosmeder, Paula M. Rodgers, Jennifer Wong
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Patent number: 6828157Abstract: A method of single parameter and multiparameter characterizing of cells, particularly immunophenotyping of cells, is provided. The method preferably uses antibody coated microspheres which are adapted to bind to specific types of cells. One or more sets of coated microspheres are added simultaneously or sequentially to a suspension of cells and bind the cells they are adapted to bind. Cells may bind to one or more microspheres. The suspension is then filtered to trap bead-cell complexes. The complexes are preferably stained and then examined to characterize the cells, preferably the cells bound to the microspheres. A kit and apparatus for performing the method are also provided.Type: GrantFiled: May 3, 2000Date of Patent: December 7, 2004Inventor: Dan A. Pankowsky
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Patent number: 6828158Abstract: Reagents and the use of the reagents in a microparticle light scattering agglutination assay are disclosed. The reagents comprise a mixture of particles having relatively stronger light scattering properties and particles having relatively weak light scattering properties with respect to one another. The particles having strong light scattering properties carry a binding partner of high reactivity with the analyte. The particles having weak light scattering properties carry a binding partner of low reactivity with the analyte.Type: GrantFiled: April 6, 2001Date of Patent: December 7, 2004Assignee: Roche Diagnostics CorporationInventors: Shinichi Eda, Jörg Heinrich Kaufmann, Stefan Pohl
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Publication number: 20040241766Abstract: Methods and assays for detecting ureido group-containing compounds and quantifying levels of these compounds in a sample are described herein.Type: ApplicationFiled: December 16, 2003Publication date: December 2, 2004Inventors: Sara Rathman Zwart, Robert McMahon
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Patent number: 6824986Abstract: The present invention involves techniques for evaluating in vivo cytokine production through the in vivo capture of secreting cytokines by labeled cytokine-binding reagents, followed by in vitro measurement of serum levels of captured cytokine. The methods of the present invention make use of the ability of a neutralizing antibody to a cytokine, when injected into a person or expierimental animal, to bind that cytokine and prevent its catabolism, excretion, or binding to a cytokine receptor. This causes the cytokine, which may normally have a very short in vivo half life, to accumulate in vivo as a cytokine/anti-cytokine antibody complex. If the anti-cytokine antibody is either labeled with a molecule that can be bound by another molecule (e.g.; biotin, which is bound by avidin or streptavidin), or is itself capable of being bound by another molecule (e.g.Type: GrantFiled: October 6, 1998Date of Patent: November 30, 2004Assignee: University of CincinnatiInventors: Fred D. Finkelman, Suzanne C. Morris
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Publication number: 20040235007Abstract: To detect intracellular negatively supercoiled DNA conveniently and efficiently.Type: ApplicationFiled: November 4, 2003Publication date: November 25, 2004Applicant: National Institute of GeneticsInventors: Susumu Hirose, Kuniharu Matsumoto
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Publication number: 20040229295Abstract: The present invention relates to methods, devices for using electromagnetic energy to inductively alter biomolecular targets for therapeutic or diagnostic purposes. The biomolecular targets optionally may be a composition comprising groups or “sinks” linked to them in order to enhance the magnitude of interaction between the target and the electromagnetic energy.Type: ApplicationFiled: February 6, 2004Publication date: November 18, 2004Inventors: Kevin S. Marchitto, Stephen T. Flock
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Publication number: 20040229248Abstract: This invention provides for labeling reagents, labeled targets and processes for preparing labeling reagents. The labeling reagents can take the form of cyanine dyes, xanthene dyes, porphyrin dyes, coumarin dyes or composite dyes. These labeling reagents are useful for labeling probes or targets, including nucleic acids and proteins. These reagents can be usefully applied to protein and nucleic acid probe based assays. They are also applicable to real-time detection processes.Type: ApplicationFiled: January 23, 2004Publication date: November 18, 2004Applicant: Enzo Life Sciences, Inc.Inventors: Jannis G. Stavrianopoulos, Elazar Rabbani
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Publication number: 20040229222Abstract: This invention relates to methods and compositions for determining single nucleotide polymorphisms (SNPs) in P450 genes. In preferred embodiments, self extension of interrogation probes is prevented by using novel non self-extension probes and/or methods, thereby improving the specificity and efficiency of P450 SNP detection in target samples with minimal false positive results. The invention thus describes a variety of methods to decrease self-extension of interrogation probes. In addition, this invention provides a unique collection of P450 SNP probes on one assay, primer sequences for specific amplification of each of the seven P450 genes and amplicon control probes to evaluate whether the intended p450 gene targets were amplified successfully. The invention also describes a variety of array platforms for performing the assays of the invention; for example: CodeLink™, eSensor™, multiplex arrays with cartridges etc., all described herein.Type: ApplicationFiled: April 1, 2002Publication date: November 18, 2004Inventors: Buena Chui, Robert Elghanian, Vineet Gupta, Krishnamurthy Jayaraman, Gretchen Kiser, Changming Li, Chang-Gong Liu, Kenneth R. Luehrsen, Abhijit Mazumder, Ramesh Ramakrishnan, Arkadiy Silbergleyt, Todd Tuggle, Carl Yamashiro, Handy Yowanto, Ekaterina Pestova, David R. Fermin, David G. Wang, Zhijie John Gu
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Patent number: 6818413Abstract: The invention relates to novel fluorescence-based assays for protein kinases and phosphatases which can be used in high throughput screening. The methods of the invention utilize a competitive immunoassay to determine the amount of substrate that is phosphorylated or dephosphorylated during the course of a kinase or phosphatase reaction to yield a product, as well as the phosphorylating or dephosphorylating activity of a kinase or phosphatase.Type: GrantFiled: June 20, 2003Date of Patent: November 16, 2004Assignee: Pharmacia and Upjohn CompanyInventors: Dennis E. Epps, Charles K. Marschke
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Patent number: 6815174Abstract: The present invention relates to a novel protein, a recombinant fusion hybrid, thioredoxin-human glutamate decarboxylase 65 and to a method of using such fusion protein in assaying anti-human glutamate decarboxylase antibodies for the diagnosis of insulin dependant diabetes mellitus. The present invention is further related to methods isolating said fusion protein ans said biotinylated fusion protein. Methods of detecting anti-glutamate decarboxylase 65 antibodies in human serum using either an E. coli protein thioredoxin-glutamate decarboxylase fusion protein or E. coli protein thioredoxin-glutamate decarboxylase-biotin as an antigen are disclosed.Type: GrantFiled: November 28, 1997Date of Patent: November 9, 2004Inventors: Edgardo Poskus, Mario Roberto Ermacora, Mariana Lorena Papouchado, Silvina Noemi Valdez
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Patent number: 6815217Abstract: A solid phase with at least one test area is described which contains reagents for the detection of at least one analyte in a sample, wherein the solid phase additionally comprises at least one control area for the detection of interfering reactions.Type: GrantFiled: January 21, 2000Date of Patent: November 9, 2004Assignee: Roche Diagnostics GmbHInventors: Johann Karl, Helmut Lenz, Friedemann Krause, Peter Finckh, Hans Hornauer, Johann Berger
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Publication number: 20040219611Abstract: A method for selecting high level antibody producing cells, comprising the step of attaching protein A or protein G to a cell surface, thus capturing secreted, soluble antibody. Fluorescence staining of the captured antibody by conventional methods and subsequent FACS analysis allows to select low abundance high producer single cells.Type: ApplicationFiled: January 26, 2004Publication date: November 4, 2004Inventor: Andy Racher
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Patent number: 6811966Abstract: The present invention is directed to novel methods for rapidly and unambiguously identifying small organic molecule ligands for binding to biological target molecules. Small organic molecule ligands identified according to the methods of the present invention may find use, for example, as novel therapeutic drug lead compounds, enzyme inhibitors, labeling compounds, diagnostic reagents, affinity reagents for protein purification, and the like. Also presented are novel methods for identifying high affinity binding ligands for a biological target molecule of interest, wherein those methods comprise linking two or more small organic molecule ligands previously identified as being capable of binding to the biological target molecule of interest. Biological target molecules include, for example, polypeptides, nucleic acids, carbohydrates, nucleoproteins, glycoproteins, glycolipids and lipoproteins.Type: GrantFiled: January 11, 2002Date of Patent: November 2, 2004Assignee: Sunesis Pharmaceuticals, Inc.Inventors: Jim Wells, Dan Erlanson, Andrew C. Braisted
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Patent number: 6812341Abstract: The present invention provides methods and compositions, including kits, for the isolation and purification of mRNA, particularly poly(A) RNA. It concerns the use of isostabilizing salts such as TMAC and TEAC to reduce rRNA carryover during the purification process, thus facilitating the isolation of poly(A) RNA.Type: GrantFiled: May 11, 2001Date of Patent: November 2, 2004Assignee: Ambion, Inc.Inventor: Richard C. Conrad
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Publication number: 20040214240Abstract: This invention uses a receptor molecule such as an antibody etc immobilized to a chip for a solid phase, and a sensor such as a pH electrode or an oxygen electrode or a glucose electrode for a search device. After immobilizing specific living cells by a bio-specific recognition reaction (a special immunity bond reaction) and washing the solid phase chip, one can measure the change of pH or oxygen consumption or glucose consumption from the metabolism of the specific living cells in substrate solution. This makes it possible to measure the activity and quantity of living cells specifically, accurately and quickly.Type: ApplicationFiled: March 3, 2004Publication date: October 28, 2004Inventor: Bo Cao
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Patent number: 6809186Abstract: The present invention relates to methods for coupling labels to particular target moieties. The coupling reactions of the present invention use temporal spacing of the reactants through phase change (i.e. by rapid freezing) to control the initiation and termination of reaction. This process results in a simplified and improved method for linking labels to specific binding moieties using N-hydroxysuccinimide chemistry. The present invention further relates to kits comprising all necessary components to easily and rapidly make protein conjugates.Type: GrantFiled: December 6, 2001Date of Patent: October 26, 2004Assignee: Martek Biosciences CorporationInventors: John P. Morseman, Xiangfei Zeng
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Publication number: 20040209317Abstract: The invention provides compositions and methods of use thereof for labeling peptide and proteins in vitro or in vivo. The methods described herein employ biotin ligase mutants and biotin analogs recognized by such mutants.Type: ApplicationFiled: January 9, 2004Publication date: October 21, 2004Applicant: Massachusetts Institute of TechnologyInventor: Alice Y. Ting
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Patent number: 6806058Abstract: The invention provides methods of analzying a secreted protein from a cell encapsulated in a microdrop. The microdrop is formulated with biotinylated matrix molecules at a reduced ratio of biotin to matrix molecules compared with previous formulations. The reduced ratio is advantageous for improving the resolution of detection and allows simultaneous detection of multiple secreted proteins and/or multiple cell surface markers. The invention further provides inter alia methods of isolating IgG isotype antibodies that have switched from IgM isotype.Type: GrantFiled: May 28, 2002Date of Patent: October 19, 2004Assignee: One Cell Systems, Inc.Inventors: Diana Jesperson, Yevgenya Akselband, Patricia McGrath, Jan Trnovsky, Phillip T. Moen
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Patent number: 6806057Abstract: Many of the effects of nitric oxide are mediated by the direct modification of cysteine residues resulting in an adduct called a nitrosothiol. A method to detect proteins which contain nitrosothiols involves several steps. Nitrosylated cysteines are converted to tagged cysteines. Tagged proteins can then be detected, for example, by immunoblotting and/or can be purified by affinity chromatography. The method is applicable to the detection of S-nitrosylated proteins in cell lysates following in vitro S-nitrosylation, as well as to the detection of endogenous S-nitrosothiols in selected protein substrates.Type: GrantFiled: October 29, 2001Date of Patent: October 19, 2004Assignee: The Johns Hopkins UniversityInventors: Solomon H. Snyder, Samie R. Jaffrey, Christopher D. Ferris, Hediye Erdjument-Bromage, Paul Tempst
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Publication number: 20040197844Abstract: Use of pregnancy-associated plasma protein-A as a marker for inflammatory conditions, and in particular, for acute coronary syndromes is described.Type: ApplicationFiled: January 29, 2004Publication date: October 7, 2004Applicant: Mayo Foundation for Medical Education and Research, a Minnesota CorporationInventors: Cheryl A. Conover, Antonio Bayes-Genis, David R. Holmes, Robert S. Schwartz
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Publication number: 20040198963Abstract: In general, the invention features proteins having covalently bonded C-terminal puromycin tags and methods for their production.Type: ApplicationFiled: December 8, 2003Publication date: October 7, 2004Inventors: Peter Lohse, Michael McPherson, Robert G. Kuimelis
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Patent number: 6800608Abstract: This invention relates to stabilized formulations comprising a glycopeptide antibiotic immobilized on carrier particles, and more particularly stabilized vancomycin bidentate conjugate formulations for assaying the concentration of vancomycin in a test sample. The invention also relates to assay formats that utilize such stabilized formulations. The invention further provides a test kit for detecting the presence of vancomycin in a test sample, wherein the test kit includes a stabilized vancomycin conjugate formulation. The invention further provides a novel rate enhancer for immunoassays for enhancing the rate of binding of an anti-analyte antibody to the analyte.Type: GrantFiled: June 22, 2001Date of Patent: October 5, 2004Assignee: Beckman Coulter, Inc.Inventors: Anthony K. Cheng, Julie S. Kim
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Patent number: 6797481Abstract: Methods, compositions and kits are disclosed. The methods are directed to determining the presence of one or more analytes in a sample suspected of containing any one of a plurality of the analytes. A combination is provided comprising in a medium (i) the sample, (ii) a binding partner for each of the analytes, (iii) for each of the analytes, a first reagent comprising a member of a signal producing system, a ligand and an analyte analog, and (iv) a second reagent comprising a binding partner for the ligand. The binding of the binding partner for the ligand is affected by the presence of an analyte and alters the amount of signal produced by the member of the signal producing system. The signal thus is modulated if one or more of the analytes are present in the sample. The amount of the signal is determined and is related to the presence of one or more of the analytes in the sample. The method may be homogeneous or heterogeneous.Type: GrantFiled: October 17, 2000Date of Patent: September 28, 2004Assignee: Dade Behring Marburg GmbHInventors: Edwin F. Ullman, Marcel Pirio, Mary C. Ericson, Daniel B. Wagner, Dariush Davalian
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Publication number: 20040180367Abstract: In the present invention, we described the use of anti-DNA antibody for the detection of prions and diagnosis of Transmissible Spongiform Encephalopathies (TSE) diseases in animals and humans.Type: ApplicationFiled: December 18, 2003Publication date: September 16, 2004Inventors: Jian Zheng, Steve Stanley Alexander
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Patent number: 6790625Abstract: A monoclonal antibody (Mab) capable of binding Placental Protein 13 (pp-13) is disclosed. Also disclosed are hybridoma clone producing the Mab, an immunoassay using the Mab for measuring the level of PP-13 in a biological fluid, and a kit for measuring the level of PP-13 in a biological fluid.Type: GrantFiled: February 21, 2002Date of Patent: September 14, 2004Assignee: Diagnostic Technologies Ltd.Inventors: Yoav Paltieli, Lev Rabinovitch
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Publication number: 20040175768Abstract: Complexes of a biotinylated fluorescent polymer and a biotin binding protein and solid supports coated with the fluorescent polymer complexes are described. The complexes can be used as sensors for detecting biological recognition events (e.g., nucleic acid hybridization reactions or enzymatic induced polypeptide cleavage). Methods of making the complexes and methods of using the complexes for detecting the presence and/or amount of a target analyte in a sample are also described. The target analyte can be an enzyme (e.g., &bgr;-secretase) or a nucleic acid (e.g., a single stranded or double stranded nucleic acid).Type: ApplicationFiled: November 14, 2003Publication date: September 9, 2004Inventors: Stuart A. Kushon, Sriram Kumaraswamy, Wensheng Xia, Robert M. Jones, Kevin D. Ley, Duncan McBranch, David G. Whitten
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Patent number: 6787325Abstract: Provided are novel complexes containing a crosslinked avidin, an analyzing method and analyzing reagents and kits whereby a compound to be analyzed can be quickly, conveniently and accurately analyzed while taking advantage of the avidin-biotin reaction. The complexes contain at least two homogeneous or heterogeneous biotin-introduced products and one crosslinked avidin sandwiched therebetween. In the analyzing method, the homogeneous or heterogeneous biotin-introduced products and the crosslinked avidin are used. The analyzing reagent contains the crosslinked avidin. The analyzing kit contains the crosslinked avidin and a biotinylating agent.Type: GrantFiled: July 5, 2000Date of Patent: September 7, 2004Assignees: Iatron Laboratories, Inc., Kikkoman CorporationInventors: Kazuyuki Sugiyama, Nobuhiro Hoshino, Hiroki Tatsumi, Satoshi Fukuda
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Publication number: 20040171087Abstract: An immunoassay kit for the qualitative and quantitative determination of a sample by the aid of specific binding partners such as, e.g., antibodies, antigens, receptors and ligands, includes a carrier or microtiter plate having a plurality of wells and precoated with a primary binding partner, which binding partner is present in fixed form as a lyophilisate. Part of the wells of the microtiter plate additionally contain a reference standard series of the sample to be determined with incremental dilutions in lyophilized form.Type: ApplicationFiled: April 19, 2004Publication date: September 2, 2004Inventors: Irene Rech-Weichselbraun, Michael Schaude
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Patent number: 6783947Abstract: Alpha-haloketones are useful alkylating agents for coupling to sulfhydryl-containing biomolecules. However, they react spontaneously with water, alkali and organic bases and therefore cannot be stored for extended periods of time in aqueous solutions, particularly in the presence of proteins at physiological pH. The present invention provides novel solutions to these problems, however, as novel compounds and compositions comprising protected haloketones are disclosed herein. Methods of preparing and using protected haloketones which are useful in a variety of applications—e.g., in assays and conjugation reactions—are also disclosed herein.Type: GrantFiled: September 9, 1999Date of Patent: August 31, 2004Assignee: Dade Behring Marburg GmbHInventors: Steve de Keczer, Yen Ping Liu, Dariush Davalian, Nurith Kurn, Edwin F. Ullman
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Patent number: 6780600Abstract: Disclosed are nucleotide coding sequences and polypeptide sequences for synaptic activation binding proteins that are characterized by induction in the central nervous system following neuronal activity in rat hippocampus. Such proteins are identified by (i) substantial homology at the nucleotide or protein sequence level to specifically defined rat, human or mouse coding sequences or proteins, (ii) ability to bind to and affect the activity of effector proteins in the CNS, such as metabotropic glutamate receptors, (iii) binding specificity for a particular binding sequence, and (iv) presence in the sequence of a PDZ-like domain. Nucleotides and polypeptides of the invention are useful in screening and diagnostic assays.Type: GrantFiled: July 20, 2001Date of Patent: August 24, 2004Assignee: The Johns Hopkins University School of MedicineInventors: Paul F. Worley, Paul R. Brakeman
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Publication number: 20040161784Abstract: This invention provides methods for the screening and identification of agents having potent effects on the progression of the cell cycle. In one embodiment, the methods involve contacting a polymerized microtubule with a microtubule severing protein or a microtubule depolymerizing protein in the presence of an ATP or a GTP and a test agent; and (ii) detecting the formation of tubulin monomers, dimers or oligomers. The p60 subunit of katanin provides a particularly preferred microtubule severing protein possessing both ATPase and microtubule severing activities.Type: ApplicationFiled: January 20, 2004Publication date: August 19, 2004Applicant: The Regents of the University of CaliforniaInventors: Ronald D. Vale, James J. Hartman
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Patent number: 6770460Abstract: The invention relates to a fusion protein having epitopes of at least two of the autoantigens glutamic acid decarboxylase (GAD65), islet cell antigen (IA2) and preproinsulin (PPINS) wherenin said epitopes are connected with a linker peptide. The fusion protein must be able to bind to a solid phase. The invention also concerns the cDNA, and a vector and cell comprising said cDNA. Furthermore, this invention relates to the use of said fusion protein in an immunoassay for the simultaneous detection of autoantibodies related to insulin-dependent diabetes mellitus.Type: GrantFiled: January 29, 1998Date of Patent: August 3, 2004Assignee: Wallac OyInventor: Ari Hinkkanen
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Publication number: 20040146950Abstract: A phosphoprotein detection reagent that selectively binds phosphoamino acids. Methods of generating and employing the reagent are also provided, as are methods of detecting modulation of protein phosphorylation are disclosed. Methods of detecting a change in state of a cell are also disclosed. Additionally, a kit for the detection of phosphoproteins is also disclosed.Type: ApplicationFiled: November 21, 2003Publication date: July 29, 2004Applicant: The University of North CarolinaInventor: Alan Howe
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Patent number: 6767714Abstract: The invention provides an improved test cell for detecting the presence of an analyte in a liquid sample. The device has an elongate casing defining a liquid sample inlet, a reservoir volume, a test volume, and a window through the casing at the test volume. Disposed within the cell is a sample absorbent, a novel biphasic substrate and a reservoir, together capable of transporting an aqueous solution within the casing along a flow path extending from the sample inlet through the test volume and into the reservoir volume. The invention further comprises a method for detecting the presence of an analyte in a liquid sample using the device and a biphasic chromatographic material for carrying out the method.Type: GrantFiled: September 12, 2001Date of Patent: July 27, 2004Assignee: Armkel, LLCInventors: Albert Nazareth, Mary Beth Boyle, Yea-Shun Cheng