The gas-phase dissociation of protein assemblies is becoming crucial for the application of mass spectrometry to structural biology. However certain aspects of the dissociation mechanism remain elusive. Moreover, many protein complexes resist dissociation at the energies accessible with current instrumentation. Here we report new insights into the collision-induced dissociation mechanism of protein assemblies. By holding activation energy constant and varying the charge state of the precursor...Expand abstract
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Quadrupole-time-of-flight mass spectrometer modified for higher-energy dissociation reduces protein assemblies to peptide fragments.
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