摘要:
A composition capable of showing a color change sufficient for indicating the presence and/or concentration of a protein in a protein-containing liquid sample by contacting with the sample, comprising: indium or an indium compound, and a dye or pigment capable of forming a complex with indium.
摘要:
Labeled oligonucleotides are provided wherein the labeled oligonucleotide is blocked at the 3' end terminus to prohibit incorporation of the labeled oligonucleotide into a primer extension product. The oligonucleotides may be incorporated as a probe in the 5' to 3' nuclease assay format.
摘要:
A dry phase reagent test strip for measuring the concentration of an analyte in a biological fluid includes a colored indicator whose hue indicates a calibration of the strip. Preferably, the test strip measures the concentration of glucose in whole blood.
摘要:
A method of detecting dioxin-like compounds consisting essentially of the group of compounds: polychlorinated dibenzodioxins, polychlorinated dibenzofurans, polychlorinated biphenyls, and structural analogues thereof which exhibit biological activity characteristic of polychlorinated dibenzodioxins, polychlorinated dibenzofurans, polychlorinated biphenyls. The assay includes: 1) an inactive Ah receptor in a form capable of binding to the dioxin-like compounds and being tranformed to an active form that forms a complex with ARNT and binds a dioxin responsive element, and 2) a quantity of ARNT sufficient to optimize Ah receptor transformation. A test sample is contacted with the assay under conditions effective to bind the dioxin-like compounds to the Ah receptor and allow transformation of the Ah receptor to an active form that forms a complex with ARNT. The presence of the complex containing the transformed Ah receptor and the ARNT is detected. The presence of the complex containing the transformed Ah receptor and the ARNT is detected with an antibody with a region capable of binding to the ARNT when associated with the complex.
摘要:
A method for reducing interferent bias such as hemoglobin bias in immunoassays using dried slide test elements featuring peroxidase and leuco dye as the labeling mechanism. The method features the steps of:
a) calibrating an immunoassay of a target analyte by ascertaining the time at which the rate of change in density produced by a first set of the test elements for the target analyte on at least one liquid having a known amount of interferent of choice and a known amount of target analyte, crosses over or minimizes the difference compared to the rate of change in density produced by a second set of test elements substantially identical to the first set of test elements, on a liquid having the known amount of target analyte but a negligible amount of interferent of choice, and b) conducting an assay of a patient sample of unknown amount of the target analyte by reading the rate of change in density in a third set of the test elements substantially identical to the first and second sets, caused by the sample, at a time corresponding to the cross-over time ascertained in step a).
a homogeneous immunochemical detection assay for the determination of aminoglycoside antibiotics in a biological sample, wherein said assay comprises the use of a water-soluble polycarboxylic acid polymer of general formula wherein
R 1 is H or COOH, R 2 is H or CH 3 and n is from 25 to 17,400, and
an assemblage of reagents containing the above polycarboxylic polymer for performing such an assay.
摘要翻译:本发明提供了用于测定生物样品中氨基糖苷类抗生素的均质免疫化学检测测定法,其中所述测定法包括使用通式为CHEM的水溶性多元羧酸聚合物,其中R 1为H或COOH, R 2为H或CH 3,n为25至17,400,以及含有上述聚羧酸聚合物的试剂组合用于进行这种测定。
摘要:
A method is provided for enhancing the stability and increasing the activity of polymer particle reagents by incubating a polymer particle which has been covalently bound to a compound of biological interest, such as a drug, with a modifying agent that will place a negative charge on the surface of the polymer particle and reduce residual functional groups. The modifying agent is preferably an anionic nucleophile selected from the group consisting of β-mercaptoacetic acid and the thiosulfates.
摘要:
The present invention provides antibodies useful in assays for mycophenolic acid (MPA). These antibodies bind MPA and are able to distinguish MPA from its esters, such as morpholineothyl E-6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-4-methyl-4-hexenoate, and/or its metabolites, such as mycophenolic acid glucuronide. The present invention also provides conjugates of labels and MPA or MPA analogs. The antibodies of the invention are capable of binding these conjugates and are also capable of inhibiting the activity of the label when bound to the conjugates. The present invention also provides methods for the determination of MPA in a sample suspected of containing MPA that use the antibodies and/or conjugates of the invention. The present invention also provides assay reagents as well as packaged kits useful for performing the methods of the invention.