Formalin-fixed isotope-labeled reference standards and methods for fabrication and use thereof
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United States of America Patent
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Jun 21, 2016
Grant Date -
Sep 13, 2012
app pub date -
Mar 6, 2012
filing date -
Mar 8, 2011
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Abstract
One or more cells are labeled with minor stable isotopes, characterized, and preserved for subsequent use as a bio-specimen reference standard. The one or more cells are grown in culture media supplied with minor stable isotopes in concentrations substantially different from normally occurring concentrations, thereby supplanting major stable isotopes that would normally be incorporated into the proteins of the cells. The proteins of the cells are thus labeled by the minor stable isotopes and can be used in proteomic characterization of the cells. The cells are preserved by fixation as a reference standard. Cells of the reference standard are mixed with the sample and subject to mass spectrometry evaluation, whereby the labeled proteins of the reference standard can be used in determining the proteome of the sample.
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