专利号:US-5362625-A 优先权日:1991-05-15 标 题:Methods and compositions for enzyme complementation assays using the omega region of β-galactosidase 发明人:KREVOLIN MARK; KATES DAVID 权利人:MICROGENICS CORP 摘要:The use of omega-acceptor and omega-donor polypeptides (comprising about two-thirds and one-third of the beta -galactosidase molecule amino and carboxyl termini, respectively), prepared by recombinant DNA techniques, DNA synthesis, or chemical polypeptide synthesis techniques, which are capable of interacting to form an active enzyme complex having catalytic activity characteristic of beta -galactosidase, is described along with improved methods and novel compositions for enzyme complementation assays for qualitative and quantitative determination of a suspected analyte in a sample.
专利号:US-7223541-B2 优先权日:2001-08-29 标 题:Terminal-phosphate-labeled nucleotides and methods of use 发明人:FULLER CARL; KUMAR SHIV; SOOD ANUP; NELSON JOHN 权利人:GE HEALTHCARE BIO SCIENCES 摘要:The present invention relates to improved methods of detecting a target using a labeled substrate or substrate analog. The methods comprise reacting the substrate or substrate analog in an enzyme-catalyzed reaction which produces a labeled moiety with independently detectable signal only when such substrate or substrate analog reacts. The present invention, in particular, describes methods of detecting a nucleic acid in a sample, based on the use of terminal-phosphate-labeled nucleotides as substrates for nucleic acid polymerases. The methods provided by this invention utilize a nucleoside polyphosphate, dideoxynucleoside polyphosphate, or deoxynucleoside polyphosphate analogue which has a colorimetric dye, chemiluminescent, or fluorescent moiety, a mass tag or an electrochemical tag attached to the terminal-phosphate. When a nucleic acid polymerase uses this analogue as a substrate, an enzyme-activatable label would be present on the inorganic polyphosphate by-product of phosphoryl transfer. Cleavage of the polyphosphate product of phosphoryl transfer via phosphatase leads to a detectable change in the label attached thereon. When the polymerase assay is performed in the presence of a phosphatase, there is provided a convenient method for real-time monitoring of DNA or RNA synthesis and detection of a target nucleic acid.
专利号:US-7052839-B2 优先权日:2001-08-29 标题 :Terminal-phosphate-labeled nucleotides and methods of use 发明人:NELSON JOHN; FULLER CARL; SOOD ANUP; KUMAR SHIV 权利人:AMERSHAM BIOSCIENCES CORP 摘要:The present invention describes methods of detecting a nucleic acid in a sample, based on the use of terminal-phosphate-labeled nucleotides as substrates for nucleic acid polymerases. The methods provided by this invention utilize a nucleoside polyphosphate, dideoxynucleoside polyphosphate, or deoxynucleoside polyphosphate analogue which has a colorimetric dye, chemiluminescent, or fluorescent moiety, a mass tag or an electrochemical tag attached to the terminal-phosphate. When a nucleic acid polymerase uses this analogue as a substrate, an enzyme-activatable label would be present on the inorganic polyphosphate by-product of phosphoryl transfer. Cleavage of the polyphosphate product of phosphoryl transfer via phosphatase leads to a detectable change in the label attached thereon. When the polymerase assay is performed in the presence of a phosphatase, there is provided a convenient method for real-time monitoring of DNA or RNA synthesis and detection of a target nucleic acid.
专利号:US-5643734-A 优先权日:1984-03-01 标题 :Methods for protein binding enzyme complementation assays 发明人:HENDERSON DANIEL ROBERT 权利人:MICROGENICS CORP 摘要:This invention relates to improved methods and novel compositions for enzyme complementation assays for qualitative and quantitative determination of a suspected analyte in a sample. The use of enzyme-acceptor and enzyme-donor polypeptides prepared by recombinant DNA techniques, DNA synthesis or chemical polypeptide synthesis techniques which are capable of interacting to form an active enzyme complex having catalytic activity characteristic of beta -galactosidase is described. Both homogeneous and heterogeneous assays utilizing these polypeptides are described.
专利号:US-5120653-A 优先权日:1985-04-08 标 题:Vector comprising DNA sequence coding for enzyme-donor polypeptide 发明人:HENDERSON DANIEL R 权利人:MICROGENICS CORP 摘要:This invention relates to improved methods and novel compositions for enzyme complementation assays for qualitative and quantitative determination of a suspected analyte in a sample. The use of enzyme-acceptor and enzyme-donor polypeptides prepared by recombinant DNA techniques, DNA synthesis or chemical polypeptide synthesis techniques which are capable of interacting to form an active enzyme complex having catalytic activity characteristic of beta -galactosidase is described. Both homogeneous and heterogeneous assays utilizing these polypeptides are described.
专利号:EP-0199801-B1 优先权日:1984-10-29 标 题:Methods for protein binding enzyme complementation assays 摘要:Improved methods and novel compositions for enzyme complementation assays for qualitative and quantitative determination of a suspected analyte in a sample. The use of enzyme-acceptor and enzyme-donor polypeptides prepared by recombinant DNA techniques, DNA synthesis or chemical polypeptide synthesis techniques which are capable of interacting to form an active enzyme complex having catalytic activity characteristics of beta-galactosidase is described. Both homogeneous and heterogeneous assays utilizing these polypeptides are described.
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合成参考文献
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