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Updated: Jun 14, 2026

Analyzing Protein Dynamics Using Hydrogen Exchange Mass Spectrometry
Published on: November 29, 2013
Comment on "Innovative scattering analysis shows that hydrophobic disordered proteins are expanded in water"
Robert B Best1, Wenwei Zheng2, Alessandro Borgia3
1Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA. robert.best2@nih.gov schuler@bioc.uzh.ch.
None:
Riback et al (Reports, 13 October 2017, p. 238) used small-angle x-ray scattering (SAXS) experiments to infer a degree of compaction for unfolded proteins in water versus chemical denaturant that is highly consistent with the results from Förster resonance energy transfer (FRET) experiments. There is thus no "contradiction" between the two methods, nor evidence to support their claim that commonly used FRET fluorophores cause protein compaction.
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