In situ hybridization method
First Claim
1. A method of identifying the presence of a known target sequence in a double-stranded nucleic acid contained in a fixed cellular or subcellular biological structure, in a defined morphological relationship with the structure, comprisingadding to the structure, a probe complex composed of RecA protein stably bound to a single-stranded, reporter-labeled probe which is complementary to a duplex target sequence, under conditions in which the complex can contact the duplex nucleic acid target,allowing the complex to bind to the target sequence under non-denaturing conditions,removing unbound complex from said structure, andexamining the structure for the presence of the reporter-labeled probe bound to the nucleic acid.
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Abstract
A method of identifying the presence of a known target sequence in nucleic acid contained in a fixed cellular or subcellular biological structure. By adding a stable, reporter-labeled RecA/single-stranded probe complex to the cellular or subcellular structure, the target sequence can be effectively labeled by in situ hybridization, allowing the target sequence to be visualized histologically and microscopically or detected by in situ cytometry or cell sorting flow techniques.
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Citations
44 Claims
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1. A method of identifying the presence of a known target sequence in a double-stranded nucleic acid contained in a fixed cellular or subcellular biological structure, in a defined morphological relationship with the structure, comprising
adding to the structure, a probe complex composed of RecA protein stably bound to a single-stranded, reporter-labeled probe which is complementary to a duplex target sequence, under conditions in which the complex can contact the duplex nucleic acid target, allowing the complex to bind to the target sequence under non-denaturing conditions, removing unbound complex from said structure, and examining the structure for the presence of the reporter-labeled probe bound to the nucleic acid.
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16. A method of identifying the presence of a known double-stranded viral nucleic acid target sequence contained in a fixed cellular or subcellular biological structure, comprising
adding to the structure, a prone complex composed of RecA protein stably bound to a single-stranded, reporter-labeled probe which is complementary to the double-stranded viral nucleic acid target sequence, under conditions in which the complex can contact the double-stranded nucleic acid target, allowing the complex to bind the target sequence under non-denaturing conditions, removing unbound complex from said structure, and examining the structure for the presence of the reporter-labeled probe bound to the nucleic acid.
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31. A method of detecting a single copy nucleic acid target sequence contained in a cellular or subcellular biological structure, comprising
fixing the cellular or subcellular biological structure, adding to the structure, a probe complex composed of RecA protein stably bound to a single-stranded, reporter-labeled probe which is complementary to the single-copy nucleic acid target sequence, under conditions in which the complex can contact the nucleic acid target, allowing the complex to bind to the target sequence under non-denaturing conditions, removing unbound complex from said structure, and examining the structure for the presence of the reporter-labeled probe bound to the nucleic acid.
Specification