Fluorescent protein-based calcium integrators
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United States of America Patent
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Dec 13, 2016
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app pub date -
Aug 5, 2014
filing date -
Aug 5, 2013
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Abstract
The presently-disclosed subject matter includes fluorescent protein-based indicators for detecting ions, small molecule analytes, or combinations thereof. In some embodiments the indicators include a polypeptide, which itself includes a fluorescent polypeptide, a compound-binding polypeptide, and a polypeptide target of the compound-binding polypeptide. In some embodiments the polypeptide includes an EosFP polypeptide, a calmodulin polypeptide, and a M13 polypeptide, or fragments and/or variants thereof. The presently-disclosed subject matter also includes methods for detecting calcium in a sample with embodiments of the present polypeptides. In some embodiments the present indicators experience a permanent shift from green to red fluorescent when exposed to an detecting substance, such as calcium.
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