4.7 Article

A chemical ''hub'' for absolute quantification of a targeted protein: orthogonal integration of elemental and molecular mass spectrometry

Journal

CHEMICAL COMMUNICATIONS
Volume 50, Issue 50, Pages 6578-6581

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cc48460b

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Funding

  1. National Basic Research 973 Program [2014CB932004]
  2. National Natural Science Foundation of China [21035006, 21275120]

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A novel element-tagged activity-based photo-cleavable biotinylated chemical ``Hub'' was designed and synthesized to orthogonally integrate ICP-MS and ESI-MS for absolute targeted-protein quantification. This tetrafunctional chemical ``hub'' allowed us to quantify a targeted protein using species-unspecific isotope dilution ICP-MS and to know which protein is being quantified using ESI-IT-MS at the same time.

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