Measurement of backbone hydrogen-deuterium exchange in the type III secretion system needle protein PrgI by solid-state NMR

[Display omitted] •We apply the RelaX-EXSY method to measure H/D exchange in a solid state protein.•The method requires proton detection and performs better at higher external magnetic fields.•Amide exchange rates are measured in deuterated Salmonella typhimurium type iii secretion system (T3SS) nee...

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