Abstract:
PROBLEM TO BE SOLVED: To provide a new quencher preferably having low background signal and/or high quenching efficiency. SOLUTION: The invention relates to: novel pyridinyl-isoquinoline-dione derivatives; methods of producing these derivatives; conjugates comprising novel pyridinyl-isoquinoline-dione derivatives and (i) a solid support, or (ii) a biomolecule; methods of producing these conjugates; and the use of these conjugates as quenchers in fluorescence resonance energy transfer (FRET). COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a reagent kit n for fluorometry of an analyte, and a novel oxidation-reduction active compound serving as a fluorescent reagent for the analyte. SOLUTION: In this method for detecting the analyte by an oxidation-reduction reaction and the fluorometry, a sample containing the analyte is brought into contact with a detecting reagent containing a compound expressed by the following general formula (1): Q-F(Q is a quencher group, and F is a fluorophore group) as a fluorescent oxidation-reduction indicator. Examples favorable as the reducible quencher group are quinones, aromatic nitroso compounds such as nitrosoanilines and other nitrosobenzene derivatives, and N-oxides. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
The invention relates to a process for the production of a biomolecule-linker conjugate of uniform stochiometry. It especially relates to a conjugate consisting of a biomolecule of a molecular weight between 5 kD and 500 kD and a hydrophilic linker molecule said linker having a molecular weight between 1 and 15 kD and between 4 and 60 charged residues, characterized in that said conjugate comprises at least one biomelecule-linker product of uniform stoichiometry in a pre-selected amount.
Abstract:
The present invention relates to a method of measuring a vitamin D metabolite in a sample, the method comprising the steps of (a) treating said sample with a vitamin D metabolite releasing reagent under conditions appropriate to release a vitamin D metabolite from vitamin D-binding protein and not to cause protein precipitation, (b) subjecting the treated sample obtained in step (a) to a chromatographic separation, and (c) measuring a vitamin D metabolite during or after said chromatographic separation. The present invention also relates to methods for determining the vitamin D status of a subject, for use in the diagnosis of disease, and to agents and kits for use in performing the methods of the invention.
Abstract:
The present invention concerns new compounds comprising a branched linker and their use for producing conjugates for applications in diagnostic or therapeutic methods.
Abstract:
The invention relates to a method for differentially hemolyzing whole blood. It discloses method for detecting an analyte in a liquid sample known or suspected to comprise red blood cells and suspected or known to comprise eukaryotic cells, the method comprising the steps of processing said liquid sample with a membrane solubilizing agent under conditions appropriate to lyse cell membranes of red blood cells and at the same time not to cause precipitation of sample constituents, subjecting the processed sample to a chromatographic separation, and detecting the analyte. The differential hemolysis of red blood cells is of advantage in a method of detecting an analyte in a liquid sample that may comprise both erythrocytes as well as nucleated cells. The differential solubilization of red blood cells can be easily combined with an online detection methodology, like LC-MS, and is advantageous in the detection of many analytes, e.g. in the detection of folate or of immunosuppressive drugs, like tacrolimus or sirolimus.
Abstract:
The present invention relates to a chemical compound comprising a light emitting moiety precursor (eg. acridine, luciferine) and a precursor of a leaving group (eg. oxazine, anilide), bound to each other by an amide or by an ester bond and characterized in that the leaving group precursor upon oxidation is converted into the leaving group. The invention also relates to compounds additionally comprising a coupling group to the use of such compounds for labeling of biomolecules and more generally to the use of such compounds in chemiluminescence detection procedures.
Abstract:
The invention relates to a process for the production of a biomolecule-linker conjugate of uniform stochiometry. It especially relates to a conjugate consisting of a biomolecule of a molecular weight between 5 kD and 500 kD and a hydrophilic linker molecule said linker having a molecular weight between 1 and 15 kD and between 4 and 60 charged residues, characterized in that said conjugate comprises at least one biomelecule-linker product of uniform stoichiometry in a pre-selected amount.
Abstract:
The present invention relates to novel bis-maleic anhydrides. It especially relates to the discovery that bis-maleic anhydride cross-linking agents can be used for preservation/fixation of a cell or tissue sample. With great advantage a bis-maleic anhydride cross-linking agent can be used in methods requiring fixation of a cell or tissue sample and at the same time requiring that the fixative has little impact on the later detection of a protein or a nucleic acid in procedures like immunohistochemistry, fluorescence in situ hybridization or RT-PCR.
Abstract:
Método para la medición de HbA1c, comprendiendo el método las etapas siguientes: a) mezclar una muestra que contiene hemoglobina con un reactivo para la digestión de la hemoglobina, comprendiendo el reactivo: aa) un tampón, ab) pepsina, y ac) una sal 1,3-dialquil-imidazolio de un catión 1,3dialquil-imidazolio y un contraión. b) digerir la hemoglobina durante 1 a 60 minutos, obteniendo de esta manera un fragmento de hemoglobina que comprende los 14 aminoácidos N-terminales de HbA1c, y c) medir dicho fragmento N-terminal de HbA1c.